hlm vertical roller mill

hlm vertical roller mill

The motor drives the reducer to rotate the millstone, the raw material are send into the center of the millstone from the air lock rotary feeder. Under the effect of centrifugal force, the material moves to the edge of the millstone. Material than be ground by the force of the roller and smashed under extrusion, grinding and cutting. At the same time, hot air is blew up around the millstone and bring up the ground material. The hot air will dry the floating material and blow the coarse material back to the millstone. The fine powder will be brought to the classifier, and then, the qualified fine powder will flow out the mill and be collected by dust collector, other coarse powder will be brought down to the millstone by the blade of classifier and be ground again. The circulation like this is the overall process of grinding.

With scientific & reasonable design and its unique advantages, HLM vertical roller mills are applied widely in power, metallurgical, cement, chemical and non-metallic industry, for grinding of various materials, such as cement raw material, clinker, limestone, slag, manganese, gypsum, coal, barite, calcite etc.. The grinding field is wide and grinding type is abundant.

1. Humidity of grinding materials: from materials of 20-30% humidity(such as carbide, lignite, chalk, etc.) to materials of humidity less than 1% (such as cement clinker), wide range of materials. 2. Grindability of materials: from high grindability(such as quartz sand, steel slag, mining slag, pyrophyllite, iron ore etc.) to low grindability (such as gypsum, calcite, etc). 3. Fineness of grinding product: from 2-5mm(such as raw shale for making brich in new wall material industry, sand for construction industry, etc) Product fineness is easy to adjust and simple operation.

HLM vertical Mill uses standard modules to design and fabricate pressurization device. With the increase in mill capacity, there is an increase in roller numbers (we can use 2,3 or 4 rollers, 6 rollers maximum) in proper permutation and combination to form the series of equipment of various capacitieswith minimum standard parts in order to meet the requirements of different materials, finenessand outputs.

A cyclone filter is used for collection of product. This arrangement can help to reduce negative working pressure and air volnme of system. Both EP and bag filter can be used as final prodnct collector.

The equipment features in a combination of crushing, drying, grinding, and conveying, simple process flow, reasonable and compact layout, space-saving (50% less than ball mill), lower foundation cost and workshop cost in the field;

(3)Vertical mill is the better equipment to lower power consumption in the mill industry, which is also what the country advocate and a must to increase the enterprise competitiveness in China powder industry.

(1) Vertical mill features in high trying ability with hot air direct contact with the material in the mill, maximalfeeding moisture of 15% is workable. A separatedrying machine and energy for the mill system can be both saved. The vertical mill can satisfy the materials in different humidity by adjusting the hot air temperature.

Simply complete the form below, click submit, you will get the price list and a Hongcheng representative will contact you within one business day. Please also feel free to contact us by email or phone. ( * Denotes a required field).

Copyright 2004-2018 by Guilin Hongcheng Mining Equipment Manufacture Co. LTD All rights reserved Tel: |FAX: | E-mail: [email protected] | After-Sales-Service:+86-400-677-6963.

vertical roller mills

vertical roller mills

With the many advantages vertical roller mills offer, we continually develop our VRM offering with the latest upgrades, including the OKTM Mill and the ATOX Coal Mill. The OKTM Mill skilfully comminutes raw material, cement and slag. It features a patented roller and table design and concrete mill stands instead of traditional, heavy steel structures.

The OKTM Mills flexible design makes it possible to operate it with a number of rollers out of service while still reaching 60 to 70 percent of the normal operation output, minimising production losses.

The compact and long-lasting ATOX Coal Mill has the capability to grind virtually all types of raw coal, to your desired fineness. It is suitable for feed materials with varying moisture percentages, handling abrasive and sticky raw coal with ease.

The cement industrys focus on energy reduction has made vertical roller mills particularly compelling. Grinding systems in cement production make up approximately 85 to 90 percent of total plant electrical energy consumption. As vertical roller mills are 30 to 50 percent more efficient than other grinding solutions, they give cement plant owners a great opportunity to

When it comes to grinding raw coal, savings in specific energy consumption can be achieved with vertical roller mills. Specific energy consumption depends on the grindability of the raw coal and the coal meal fineness required. A dynamic separator that ensures high separation efficiency also helps to reduce specific energy use.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

mtw grinding mill,mineral grinding mill manufacturer,professional grinding plant - kefid machinery

mtw grinding mill,mineral grinding mill manufacturer,professional grinding plant - kefid machinery

Recently, an ultimate showdown between MTW European Tech. Grinding Mill and another hot sale brand is unfolding, and we will evaluate the grinding mill of the same model in capacity, production efficiency and innovative technology, and announce the performance results.

Chief engineer of KEFID grinding mills, Mr. Bai Yinghui said, "In China, many customers only consider the capacity when choosing the grinding mill, but ignore the production efficiency. Today we will duke it out at site."

MTWM European Tech. Grinding Mill keeps many advantages of TGM grinding mill especially the linkage pressure of the rollers, which greatly prolongs the useful life of the equipment and increases the capacity by 20% under the same power.

The MTW is driven through the bevel gear and compact in its structure, thus it is quite easy to be installed and adjusted; While the traditional mill has to be equipped with a reducer which drives the main axis through coupling, it is rather difficult to be centered while being installed, and it's noise-making and inefficient.

The curved air channel makes the air flow smoothly and causes low resistance and few blocking, thus increases the production efficiency by 30% ; while the traditional one uses straight-type air channel which often increases eddy vortex and blocking.

The observation window of the air volute of traditional mill is not in the same surface with the volute, causing vortex flow and increasing energy consumption; while the MTW avoids the above problem, and greatly enhances the milling efficiency.

The traditional mill uses grease lubrication, which makes high resistance and temperature, thus shortening the bearings' life. MTW series mill adopts inner oil pumps, so the main shaft bearing and bevel gear bearing can be lubricated without an additional lubrication system. Meanwhile it has water cooling system which can prolong the equipment's life greatly.

The edge of the blade of traditional mill has faster speed of abrasion. And the blade is a whole plant, if one edge of the blade was abraded, you should change the whole blade, it will waste your material and the working time. But MTW mill will have longer life because of the material of the blade is high wear resistant material. You just need to change the edge of the blade, which increases the material utilization. What's more, The blade of the traditional mill is planar, materials were always accumulated together in one place, which made the central of the roller and ring abraded greatly. But the camber blade do not have this problem, all the upper, middle and lower of the roller and ring can grind evenly, so it will increase capacity.

First, raw material should be crushed by the jaw crusher to the size specified, and then the crushed stuff is elevated into a hopper from which the stuff is loaded, through the vibrating feeder, evenly and continuously into the grinding chamber for powder-processing.

After this, the ground stuff is carried by the air into the separator for screening. The fine powder are blow into the cyclone collector and are poured out through the output-powder valve as the final products and the rough stuff after the screening will be recycled back into the grinding chamber for regrinding.

MTW European Tech. Grinding Mill can be widely used for grinding the following non-flammable and non-explosive materials with Moh's hardness and moisture lower than 9.3 and 6% respectively, such as quartz, feldspar, calcite, talc, barite, fluorite, marble, ceramics, bauxite, mineral slag, grain slag, cement clinker, activated carbon, dolomite, granite, , fertilizer, kaolin, coke, bentonite, pyrophyllite, basalt, gypsum, graphite, etc. Next, let's see production sites of MTW European Tech. Grinding Mill from all over the world.

Client situation: This is the second time for this client to cooperate with KEFID. The most important factor they choose us is MTW215, which is the biggest model of pendulum mill in the world. KEFID is the original manufacturer in China to supply this kind of HighCapacity Limestone Grinding Mill, we had cooperated with this customer for fours years. The other two important factors he chose us is KEFID's professional technology and perfect after-sale service: "Our site space is limited in Thailand , but KEFID chief engineer gave us a special design for the grinding mill according to my site situation. I like their service and I trust KEFID. "

Client situation: This client originally used our old Overpressure Trapezium Mill, and was very satisfied with our product quality and after-sales service. With the upgrade of our products, the client unhesitatingly chose our latest MTW European Tech. Grinding Mill to enlarge their production line. The equipment adopts advanced inner thin-oil lubricating system with easy repair and maintenance, moreover, replaceable shovel blade in hook face prolongs the service time of wearing parts, all these can greatly reduce the replacement cost in later period. So far the equipment operates in stability and local customers take delight in talking about it.

Client situation: This client didn't believe in our finished product ratio at first. After 3 times actual field experiments, finally the client was deeply convinced that our equipment can meet their requirements. The client had considered other manufacturers before us, but after visiting our site, he was deeply impressed by our site's clean surroundings and advanced lubrication system, which greatly reduced the customers' operation cost and met the high demand of European environmental protection, therefore, the client happily decided to cooperate with KEFID.

Please enter your demand such as: Material: granite, limestone or gypsum, etc. Production: 5TPH, 10TPH or 100TPH, etc. Input size: 30cm, 50cm, 100cm, etc. Output size: 200 mesh, 400 mesh, or 3mm, 10mm, etc

mtw european trapezium mill_henan yuhong heavy machinery co.,ltd

mtw european trapezium mill_henan yuhong heavy machinery co.,ltd

Processed Materials:Limestone, calcite, barite, dolomite, potassium feldspar, bentonite, medical stone, rock phosphate, manganese ore, iron ore, quartz, active carbon, carbon black, ceramic, coal, etc..

MTW European Trapezium Mill--- the latest type of Raymond Mill, has become one of the most advanced grinding mills in the world with its so many intellectual properties like bear-gear drive, inner oil lubricating system, arc air channel, etc.

1. EfficientBevel gear overall drive reduces noise and increases drive efficiency and capacity.Inner automatic thin-oil lubricating system makes better lubrication for bearings.2. EconomicalEdge-replaceable shovel saves you money and frequency-control separator and cyclone powder collector ensure high capacity.3. AdvancedArc air channel reduces energy consumption and intelligent control ensures better operation.4. Environmentally friendlyUnique air recycling system and dust collector make clean environment.

The system consists of grinding mill, separator, air blower, jaw crusher, vibrating feeder, hopper, dust collector, pipe, powder collector, electric cabinet, motors, etc.Big lump materials are crushed to required size by jaw crusher, then elevated to buffering hopper through elevator, after that fed into the mill to be ground. Materials are to be ground between ring and rollers, and move up with the air flow, those particles which cannot pass the separator will fall down and be ground again, while others will be collected as finished product. Air flow passing through separator will go to the air blower for recycling, it's a closed system.

Focus on Quality, Serve Worldwide Establish strong sales service system with full coverage for 6 continents, 140 countries. Whatever your requirements, you 'll find the perfect service-oriented solution to match your specific needs with our help.

brief introduction of gypsum

brief introduction of gypsum

Gypsum, a monoclinic mineral, is a hydrate of calcium sulfate (CaSO4). Gypsum is a kind of widely used industrial materials and building materials. It can be used for cement retarder, gypsum building products, model making, medical food additives, sulfuric acid production, paper filler, paint filler, etc.

vertical roller mill for coal lm series

vertical roller mill for coal lm series

For each project scheme design, we will use professional knowledge to help you, carefully listen to your demands, respect your opinions, and use our professional teams and exert our greatest efforts to create a more suitable project scheme for you and realize the project investment value and profit more quickly.

Vertical Roller Mill, LM Vertical Grinding Mills LM vertical grinding mill is the world expert on the basis of long-term state company's mill development experience, according to the United States, Germany, Japan and other experts for the Chinese mill use of user requirements and recommendations, based on the original high pressure hanging roller mill on After painstaking research to design a ...

MTW Series Trapezium Mill is owns many independent patents, such as overall prick gear drive, internal thin oil lubrication system, arc-shaped air duct. LUM Ultrafine Vertical Roller Mill Based on abundant experience on producing vertical grinding mill and the latest technology from Taiwan &Germany, ZENITH developed the LUM Series Ultrafine Vertical Roller Mill, which gets high reputation from ...

vertical roll mill LM - mine-equipments. LM Vertical Grinding Mill,Vertical Roller Mill Operation For those mining investors who want to get a cheap price and cost of mining grinder, 's LM series vertical grinding mill can meet their particular ...

HLM Series vertical roller mill is a kind of advanced mill developed by Hongcheng based on two decades of R&D experience and introduction of foreign advanced technology. It features in a combination of drying, grinding, classifying and conveying. HLM vertical ...

LM Vertical Roller Mill integrates crushing, drying, grinding, classifying and conveying together, and it is specialized in processing non-metallic minerals, pulverized coal and slag. Its coverage area is reduced by 50% compared with ball mill, and the energy consumption is saved by 30%-40% similarly.

Request a quotation Thank you for your interest in Our Industrial Grinding Mill. If you want to get help immediately, please chat online now. At the same time, you can also fill in your requirements, we will reply you in 24hours. * Product

MTM Series Trapezium Mill Raymond mill is ever one classic powder grinding machine in the past. And most of modern mill are from it and. More LM Vertical Roller Mill Vertical Roller Mill is our newly-launched product which is applied as a solution to the More

LM Vertical Grinding Mill Get Product Quotation SBM has launched the LM vertical grinding mill which integrates five functions of crushing, grinding, powder selection, drying and material conveying. It is characterized by centralized technological process, small ...

LM series vertical mill is one advanced mill adopted top technology of domestic and abroad, and based on many years mill experience. LM vertical mill can be widely used in such industries as Cement, electric power, metallurgy, chemical industry, nonmetallic mineral.

We have supplied vertical roller mills VRM for raw coal slag and cement grinding for several decades The vertical roller mill is well known in the cement and power plant industries as the preferred mill for grinding of raw materials It is increasingly used as a solution ...

Lm Vertical Grinding Mills Lm Vertical Grinding Mills Scm Ultrafine Mill; LM Vertical Grinding Mills Working Principle. LM vertical grinding mills is widely absorb the advanced technology in the foundation of international well-known company, combined with our thirty years of grinding equipment production experience, integrated design and development of a set of crushing, grinding, powder

LM series vertical roller mill (vertical mill) is the Zenith to solve industrial mill production is low, the energy consumption of higher technical challenges, absorb the advanced technology and combining the Zenith years flour mill design and manufacture of advanced

LM vertical roller mill is our company in the relevant grinding technology is becoming more mature and technical advantages. Latest Solutions. Serbia is rich in coal, iron ore, zine ore, quarry stone, etc..

ATOX Coal Mill An extremely compact, air-swept vertical roller mill, the ATOX coal mill grinds and dries all types of coal and is ... Compare this product Remove from comparison tool Raymond grinding mill / single-roller / vertical / for limestone MB5X

The selection rate of vertical mill in the raw materials, coal, cement and slag grinding accounts for 85%, 80%, 70% and 93% respectively. Vertical roller mill has become the preferred grinding equipment in .

LM series vertical roller mill set broken, dry, grinding, graded transport in one, compact layout, covers an area of only 50% of the ball mill system. Roller in the disc directly crushed grinding materials, energy consumption than the ball mill system by 30% -40%.

lm vertical grinding mill for sale in georgia For each project scheme design, we will use professional knowledge to help you, carefully listen to your demands, respect your opinions, and use our professional teams and exert our greatest efforts to create a more suitable project scheme for you and realize the project investment value and profit more quickly.

Vertical Roller Mill Great Wall Vertical roller mill is mainly used for grinding raw meal, clinker, GGBFS(Ground Granulated Blast Furnace Slag), iron ore, limestone, coal powder, coke powder, coal gangue, fly ash, volcanic ash, gypsum, calcite, pyrophyllite, quartz ...

The selection rate of vertical mill in the raw materials, coal, cement and slag grinding accounts for 85%, 80%, 70% and 93% respectively. Vertical roller mill has become the preferred grinding equipment in .

The DLP Lump Breaker consists of a square cross section casing with upper and lower flange, two horizontal rotating shafts equipped with chopping knives, a grid to hold back lumps, four end bearing assemblies with integrated ...grinding roller mill (US Patent Nos. 7665681 and 7963471) was specifically designed to achieve a product size distribution with d50 measurement of less than 10 microns ...

LM vertical roller mill is our company in the relevant grinding technology is becoming more mature and technical advantages. Latest Solutions. Serbia is rich in coal, iron ore, zine ore, quarry stone, etc..

Because of increasingly mature vertical mill technologies and prominent technical advantages of vertical mills, SBM releases LM Series Vertical Mill. It is a vertical mill with multiple intellectual property rights and a successful result of absorption of foreign .

Vertical Roller Mill, LM Vertical Grinding Mills LM vertical grinding mill is the world expert on the basis of long-term state company's mill development experience, according to the United States, Germany, Japan and other experts for the Chinese mill use of user requirements and recommendations, based on the original high pressure hanging roller mill on After painstaking research to design a ...

LM series vertical roller mill set broken, dry, grinding, graded transport in one, compact layout, covers an area of only 50% of the ball mill system. Roller in the disc directly crushed grinding materials, energy consumption than the ball mill system by 30% -40%.

lm vertical grinding mill for sale in georgia For each project scheme design, we will use professional knowledge to help you, carefully listen to your demands, respect your opinions, and use our professional teams and exert our greatest efforts to create a more suitable project scheme for you and realize the project investment value and profit more quickly.

Vertical Coal Mill, also known as coal mill, for superfine grinding of raw coal, soft coal specifically for cement, power plant, steel mill and other fields. Its special design structure and production process creates the higher production efficiency with lower energy consumption, less dust, lower noise than ball mill, which meets national standard of energy saving industry.

LM vertical roller mill (medium speed mill, vertical mill,2016-06-28 LM vertical roller mill, vertical mill is a mature technology, foreign successful experience and our technical innovation and upgrading the perfect combination of an energy-efficient mill equipment.

us patent for vertical roll mill patent (patent # 10,843,200 issued november 24, 2020) - justia patents search

us patent for vertical roll mill patent (patent # 10,843,200 issued november 24, 2020) - justia patents search

A vertical roll mill may include a grinding plate, a grinding roll, a nozzle ring that horizontally surrounds the grinding plate, an air feed apparatus disposed under the nozzle ring, a discharge element disposed below or in a region of the air feed apparatus, and a bypass apparatus disposed in the nozzle ring. The bypass apparatus may form a connection between the nozzle ring and the discharge element. Further, the bypass apparatus can discharge particles that are difficult to grind, for example, ductile particles such as iron particles, from the grinding process. In some examples, the bypass apparatus includes a gas-impermeable outer skin in the region of the air feed apparatus.

This application is a U.S. National Stage Entry of International Patent Application Serial Number PCT/EP2016/053905, filed Feb. 25, 2016, which claims priority to German Patent Application No. DE 10 2015 203 856.4 filed Mar. 4, 2015, the entire contents of both of which are incorporated herein by reference.

The present disclosure generally relates to vertical roll mills and, more particularly, to vertical roll mills with bypass apparatuses for discharging difficult-to-grind particles from the grinding process.

In the grinding of cement, cement clinker is increasingly being replaced by further constituents, such as for example limestone, slag sand or fly ash. This has the result that the clinker component, in a decreasing fraction, must tendentially be ground more finely in order to ensure the product quality, in particular the cement strengths. It is to be expected that this trend will continue in future for economical and ecological reasons. A modern vertical roll mill must therefore be capable of processing these different feed materials in a simultaneously diversified product portfolio (individual customer demands) in order to meet the market requirements. This however has the effect that a vertical roll mill cannot be optimized for operation with a particular feed material, but rather, where possible, a series of different feed materials must be ground together or separately in the mill. The cement grinding installation should in this case be capable of being converted quickly and flexibly (without mechanical modifications) between different grinding products. It is thus necessary for suitable process and operating parameters to be found which permit energy-efficient and throughput-optimized grinding operation for all grinding materials.

In the grinding of slag sand, it is furthermore the case that a build-up of magnetic fine iron occurs on the grinding plate. Here, the build-up of fine iron on the grinding plate or on the grinding track during the grinding of slag sand or blast furnace slag cannot be prevented by means of an adaptation of the operating parameters alone. An average slag sand or blast furnace slag comprises an iron fraction in a mass fraction of between 0.3% and 0.5%.

In principle, the iron may be discharged from the mill in two ways. One variant is the discharging of the iron via the product flow. Here, the iron must be transported pneumatically to the classifier and subsequently passed through the classifier rotor in order to exit the mill with the grinding product. The high density of the iron in relation to the slag sand, and the small particle size of the product, oppose a discharge of the iron with the product flow. Thus, the pneumatic transport to the classifier is impeded, and in the classifier, the iron is preferentially repelled at the rotor owing to its relatively high density, such that said iron is fed to the plate again as grit. Owing to the ductility of the iron particles, scarcely any comminution occurs, such that the fine iron circulates and builds up in the mill.

In the second variant, the iron particles fall through the nozzle ring and are thereafter extracted from the material stream in the external material circuit by means of a magnetic separator. The second discharge possibility via the nozzle ring is however restricted only to the coarse iron particles, because the relatively fine iron particles are conveyed back to the plate owing to the high speed in the nozzle ring. By contrast, the coarse iron particles fall through the nozzle ring and are conveyed with the aid of discharge elements into the external circuit. A lowering of the speed in the nozzle ring for the ejection of fine iron particles is not expedient, because this, inter alia, has an adverse effect on the load capacity within the mill. A structural enlargement of the nozzle ring surface area (lowering of the speed in the nozzle ring) in turn impairs the operation, because the transmitted momentum is not sufficient to accelerate the product particles in the direction of the classifier. In particular during swing operation, for example during the grinding of cement clinker using the same grinding installation, the grinding process is adversely affected.

The accumulated fine iron is accordingly too coarse for the product and too fine for the transverse-flow classification at the nozzle ring. The build-up of the fine iron has an adverse effect on the wear of the grinding tools, of the mill housing and of the classifier. Furthermore, the fine iron that circulates in the mill causes an increase in the energy requirement, with an associated decrease in throughput capacity. Furthermore, the fine iron, above a certain concentration in the grinding circuit, leads to relatively intense vibrations during the operation of the mill.

Although certain example methods and apparatus have been described herein, the scope of coverage of this patent is not limited thereto. On the contrary, this patent covers all methods, apparatus, and articles of manufacture fairly falling within the scope of the appended claims either literally or under the doctrine of equivalents. Moreover, those having ordinary skill in the art will understand that reciting a element or an element in the appended claims does not restrict those claims to articles, apparatuses, systems, methods, or the like having only one of that element, even where other elements in the same claim or different claims are preceded by at least one or similar language. Similarly, it should be understood that the steps of any method claims need not necessarily be performed in the order in which they are recited, unless so required by the context of the claims. In addition, all references to one skilled in the art shall be understood to refer to one having ordinary skill in the art.

The invention generally relates to vertical roll mills that have a bypass apparatus for discharging particles that are difficult to grind such as, for example, ductile particles such as iron particles, from the grinding process.

The vertical roll mill according to the invention comprises a grinding plate, at least one grinding roller, a nozzle ring, an air feed apparatus and at least one discharge element. The nozzle ring horizontally surrounds the grinding plate, which means that the nozzle ring is arranged in ring-shaped fashion around the grinding plate in the same plane. The air feed device is arranged below the nozzle ring, and the at least one discharge element is arranged below or in the region of the air feed device. The at least one discharge element is preferably arranged below the air feed device. According to the invention, the vertical roll mill comprises at least one bypass apparatus, wherein the at least one bypass apparatus forms a connection between the nozzle ring and the at least one discharge element.

The at least one bypass apparatus preferably does not make direct contact with the walls of the discharge element, because the discharge element rotates with the grinding plate and the bypass apparatus may be fixed in static fashion.

By means of the at least one bypass apparatus, a flow-calmed region is generated at the location of the bypass apparatus in the nozzle ring. In said region, practically any material can be discharged, regardless of size and specific weight, through the at least one bypass apparatus.

In one embodiment of the invention, the at least one bypass apparatus comprises a gas-impermeable outer skin in the region of the air feed apparatus. The gas-impermeable outer skin is for example a metal wall, a plastics wall or a composite material wall, in particular a glass fiber composite material wall or a carbon fiber composite material wall. In the context of the invention, gas-impermeable is to be understood here merely to mean that the outer skin is impermeable to the relatively intense gas flow in the region of the air feed apparatus, and thus generates no significant flow in the region of the nozzle ring. Questions regarding gas diffusion are therefore irrelevant in the context of this invention.

In a further embodiment of the invention, the number of bypass apparatuses corresponds to the number of grinding rolls. Alternatively, the number of bypass apparatuses corresponds to an integer multiple of the number of grinding rolls. The vertical roll mill particularly preferably comprises two to six grinding rolls and two to six bypass apparatuses.

In a further embodiment of the invention, the vertical roll mill comprises at least two bypass apparatuses. The at least two bypass apparatuses are arranged equidistantly. In the case of two bypass apparatuses, it is thus the case that these are spaced apart by 180 on the nozzle ring, and in the case of three bypass apparatuses, these are spaced apart by 120, and in the case of four bypass apparatuses, these are spaced apart by 90. If the vertical roll mill comprises an integer multiple of bypass apparatuses in relation to the number of grinding rolls, it is thus possible for groups of bypass apparatuses, which correspond to a number corresponding to the integer multiple, to be arranged equidistantly with respect to one another.

In a further embodiment of the invention, the at least one bypass apparatus comprises a cross-sectional area at the surface of the nozzle ring, wherein the cross-sectional area of the at least one bypass apparatus amounts to less than 2.5% of the surface area of the grinding plate.

In a further preferred embodiment of the invention, the at least one bypass apparatus comprises a cross-sectional area at the surface of the nozzle ring, wherein the cross-sectional area of the at least one bypass apparatus amounts to less than 1.0% of the surface area of the grinding plate.

In a further preferred embodiment of the invention, the at least one bypass apparatus comprises a cross-sectional area at the surface of the nozzle ring, wherein the cross-sectional area of the at least one bypass apparatus amounts to less than 0.5% of the surface area of the grinding plate.

The at least one bypass apparatus self-evidently adversely affects the functioning and thus the efficiency of the nozzle ring. In particular, product is also discharged through the at least one bypass apparatus. Therefore, an excessively high bypass rate, which would arise as a result of an excessively large cross-sectional area of the at least one bypass apparatus, is not expedient.

In a further embodiment of the invention, the at least one bypass apparatus comprises a cross-sectional area at the surface of the nozzle ring, wherein the cross-sectional area of the at least one bypass apparatus amounts to at least 0.01% of the surface area of the grinding plate.

In a further embodiment of the invention, all of the bypass apparatuses together comprise a cross-sectional area at the surface of the nozzle ring, wherein the cross-sectional area of all of the bypass apparatuses together amounts to less than 2.5% of the surface area of the grinding plate.

In a further embodiment of the invention, the sum of all of the cross-sectional areas of all of the bypass apparatuses at the surface of the nozzle ring amounts to less than 10% of the surface area of the nozzle ring.

In a further preferred embodiment of the invention, the sum of all of the cross-sectional areas of all of the bypass apparatuses at the surface of the nozzle ring amounts to less than 5% of the surface area of the nozzle ring.

In a further embodiment of the invention, the bypass apparatus comprises a largest cross section of less than 250 mm. For example, in the case of a circular cross section, the largest cross section is to be understood to mean the diameter, and in the case of a rectangular cross section, the largest cross section is to be understood to mean the diagonal between opposite corners. The largest cross section thus constitutes the largest dimension that the cross section of a particle can have in the same plane such that the particle can pass through the bypass apparatus.

In a further embodiment of the invention, a separator is arranged downstream of the discharge element. The separator is preferably a magnetic separator, and the magnetic separator is particularly preferably selected from the group comprising drum-type magnetic separator and overbelt magnetic separator.

In a further embodiment of the invention, a material return line to the grinding plate is arranged downstream of the separator. By means of the separator, it is possible in particular for the iron to be removed. The other components generally comprise the starting material or the product, such that these are advantageously fed to the grinding plate again.

For example, the bypass apparatus is of conical design. This has the advantage that, as a result of the relatively small diameter at the lower end, less air can pass from the air feed device via the discharge element into the bypass apparatus, and thus the flow region above the bypass apparatus can be calmed in a particularly efficient manner.

In a further embodiment of the invention, the bypass apparatus is arranged within a region, which exhibits a below-average throughflow, of the air feed apparatus. This arrangement, too, has the effect that less air can pass from the air feed device via the discharge element into the bypass apparatus, and thus the flow region above the bypass apparatus can be calmed in a particularly efficient manner. The bypass apparatus is particularly preferably situated in a region which exhibits a sufficient ejection of material from the grinding plate. In this context, sufficient is to be understood to mean a region which exhibits locally above-average ejection of material.

In a further embodiment of the invention, the discharge element comprises a closure flap and the bypass apparatus is at a maximum distance of 950 mm from the bottom edge of the discharge element. As a result of the relatively small spacing, less air can pass from the air feed device via the discharge element into the bypass apparatus, and thus the flow region above the bypass apparatus can be calmed in a particularly efficient manner.

In a further preferred embodiment of the invention, the discharge element comprises a closure flap and the bypass apparatus is at a maximum distance of 750 mm from the bottom edge of the discharge element.

In a further preferred embodiment of the invention, the discharge element comprises a closure flap and the bypass apparatus is at a maximum distance of 550 mm from the bottom edge of the discharge element.

In a further embodiment of the invention, the vertical roll mill comprises an axis of symmetry, particularly preferably a threefold axis of rotation (C3 in Schoenflies notation), a fourfold axis of rotation (C4 in Schoenflies notation) or a sixfold axis of rotation (C6 in Schoenflies notation).

FIG. 1 shows a schematic cross section of the vertical roll mill 10, and FIG. 2 shows a schematic plan view onto the plane of the grinding plate 20. The grinding plate 20 comprises for example a diameter of approximately 4.5 m, and the nozzle ring 40 comprises a width of approximately 40 cm. In this exemplary vertical roll mill 10, three grinding rolls 30, of which only one is visible in FIG. 1, are situated above the grinding plate 20. Situated below the nozzle ring 40 is the air feed device 50, into which air is introduced by three air inlets (visible in FIG. 2), which air rises upward through the nozzle ring 40 and discharges the ground product from the vertical roll mill 10. In the region of the air feed device 50 there is arranged a discharge element 60 in which material that falls through the nozzle ring 40 is captured. Said material generally comprises large and relatively heavy particles. These are fed through a closure flap 80 to a separator 90. In the separator 90, which in this example is designed as a magnetic separator, iron particles are removed. The remaining material is fed via the return line 100 back to the grinding plate 20. Furthermore, the vertical roll mill 10 comprises an air outlet 105. This construction corresponds in this respect to a vertical roll mill according to the prior art.

The vertical roll mill 10 according to the invention additionally comprises, in the example shown, three bypass apparatuses 70 which lead from the nozzle ring 40 into the discharge element 60. Since the discharge element 60 is designed in the form of a depression below the air feed device 50, said region exhibits reduced flow, whereby only very little air is conducted from the air inlet 55 through the air feed device 50, the discharge element 60 and the bypass apparatuses 70. As a result, the flow above the bypass apparatuses 70 is greatly reduced, and it is thus possible for even small and relatively lightweight iron particles to be discharged through the bypass apparatuses 70.

As emerges from FIG. 2, the bypass apparatuses 70 are oriented with a maximum spacing in terms of flow to the three air inlets 55. In this way, the air flowing through the bypass apparatuses 70 is additionally reduced.

FIG. 3 shows a bypass apparatus 70, wherein the bypass apparatus 70 comprises, in the upper region, additional material-guiding panels 75 which, in the region of the nozzle ring 40, increase the introduction of material into the bypass apparatus 70. FIG. 3a shows, in cross section, the funnel function of the material-guiding panel 75, and FIG. 3b clearly shows, in plan view, the relationship between the diameter of the bypass apparatus 70 and that of the material-guiding panel.

10 Vertical roll mill 20 Grinding plate 30 Grinding roll 40 Nozzle ring 50 Air feed device 55 Air inlet 60 Discharge element 70 Bypass apparatus 75 Material-guiding panel on bypass apparatus 80 Closure flap 90 Separator 100 Return line 105 Air outlet

3. The vertical roll mill of claim 1 wherein the bypass apparatus is one of a plurality of bypass apparatuses and the grinding roll is one of a plurality of grinding rolls, wherein a quantity of the plurality of bypass apparatuses corresponds to a quantity of the plurality of grinding rolls.

4. The vertical roll mill of claim 1 wherein the bypass apparatus comprises at least two bypass apparatuses disposed equidistantly within the nozzle ring such that each of the at least two bypass apparatuses is equidistant from the adjacent bypass apparatus in both directions along a circumference of the nozzle ring.

5. The vertical roll mill of claim 1 wherein the bypass apparatus comprises a cross-sectional area at a surface of the nozzle ring, wherein the cross-sectional area of the bypass apparatus amounts to less than 2.5% of a surface area of the grinding plate.

6. The vertical roll mill of claim 1 wherein the bypass apparatus comprises a cross-sectional area at a surface of the nozzle ring, wherein the cross-sectional area of the bypass apparatus amounts to less than 1.0% of a surface area of the grinding plate.

7. The vertical roll mill of claim 1 wherein the bypass apparatus comprises a cross-sectional area at a surface of the nozzle ring, wherein the cross-sectional area of the bypass apparatus amounts to less than 0.5% of a surface area of the grinding plate.

8. The vertical roll mill of claim 1 wherein the bypass apparatus is one of a plurality of bypass apparatuses, wherein a sum of all cross-sectional areas of the plurality of bypass apparatuses at a surface of the nozzle ring amounts to less than 10% of a surface area of the nozzle ring.

9. The vertical roll mill of claim 1 wherein the bypass apparatus is one of a plurality of bypass apparatuses, wherein a sum of all cross-sectional areas of the plurality of bypass apparatuses at a surface of the nozzle ring amounts to less than 5% of a surface area of the nozzle ring.

top 5 common lime uses in your daily life

top 5 common lime uses in your daily life

3. lime soil and tabia after mixing lime powder and clay is called lime soil, and then add sand or stone chips, slag, etc. tabia. Lime and tabia are widely used for foundation of buildings and bedding of roads.

4. Silicate concrete and its products with lime and siliceous materials (such as quartz sand, fly ash, slag, etc.) as the main raw materials, through grinding, batching, mixing, forming, curing (steam curing or steam curing) and other processes to get artificial stone. Commonly used silicate concrete products are steam curing and pressure curing of various fly ash brick, lime sand brick, block and aerated concrete, etc.

5. carbonated lime plate will grind lime, fibrous filler (such as glass fiber) or lightweight aggregate and water mixing molding for the blank body, and then through carbon dioxide for artificial carbonization (about 12 ~ 24 hours) and become a kind of lightweight plate. Suitable for non-load-bearing inner partition panels, ceilings, etc.

Cast lime blocks and powder should be transported and stored under dry conditions, and should not be stored for too long. Long-term storage should be under airtight conditions, and should be moisture-proof, waterproof.

MTW European Grinding Mill is innovatively designed through deep research on grinding mills and development experience. It absorbs the latest European powder grinding technology and concept, and combines the suggestions of 9158 customers on grinding mills. This grinding mill perfectly satisfies the production demands of the customers on 200-33m (80-425Mesh) fine powder.

Get in Touch with Mechanic
Related Products
Recent Posts
  1. ore grinding appliion and roller crusher type

  2. high quality mine raymond mill roller dolomite dry calcium carbonate milling machine

  3. chinaware ball mill roller

  4. toothed roll crusher yurkoff

  5. melaleuca stone raymond roller mill

  6. landis 36 and 216 type 30r roll grinding machine

  7. large roll crusher

  8. digunakan mesin roll grinding

  9. jewelry rolling mills for sale sa

  10. mtw110 vertical roll mill slag grinding mills

  11. ore mining vibration screen for sale

  12. crusher 36 machine

  13. u s a ball mill balls ceramics

  14. spiral recipes

  15. indoor portable air purifier with ultraviolet function 7 stages purifying true hepa filter ionizer

  16. rotary kiln and dryer metal of america rotary serv

  17. singapore city low price new ilmenite crushing production line price

  18. wet ball dry ball mill machines made in chile mining mobile

  19. flotation machine never

  20. gold mining equipment in dubai