sawdust briquetting systems - ruf briquetting systems

sawdust briquetting systems - ruf briquetting systems

Dealing with sawdust and wood dust is a costly hassle. Sawdust, the byproduct of most woodworking processes, leaves manufacturers and facilities with fine particles of wood everywhere. Flammable and dangerous when inhaled, sawdust has to be stored in your facilitywith a multi-step disposal process. But theres a better solution.

We know how frustrating it is to feel like youre leaving money on the floor. Instead of dumping sawdust in a landfill, you can convert it into briquettes, which can be sold for home heating and outdoor recreational use. With the growing market for briquette-based fuel, selling energy-efficient and carbon-neutral wood briquettes as a fuel source provides numerous benefits for companies.

metal briquetting press | ruf briquetting systems

metal briquetting press | ruf briquetting systems

The value of metal residues can be greatly increased with our metal press machine. The metal chip briquetting machine is a real all-rounder and is suitable for pressing aluminium, steel, cast iron, copper and countless other metals. On the basis of the particular experience we have gained in the field of metal chip recycling, we are able to offer briquetting solutions which are individually tailored to customer-specific requirements.

Briquetting is a suitable treatment method for de-watering or de-oiling wet metal chips. During the briquetting process, our metal chip press recovers cooling lubricants that adhere to the damp metal chips. Consumption of these expensive cooling lubricants is thereby significantly reduced. Depending on customer requirements, we offer metal chip presses for throughputs between 30 and 5,000 kg per hour. The required throughput and briquette density will have an influence on the choice of the briquette format.

"This is the perfect solution to our handling and space problems. And the waste aluminium in the compact briquette shape largely cleaned of the cooling lubricant emulsion achieves a higher profit when sold on ."

"First and foremost I am impressed by the good price-performance ratio, the quality and the reliability of the machines. Besides I truly appreciate the excellent personal relationship I have experienced with the family business and their Senior Director Hans Ruf from day one."

"Our collaboration with company RUF has started in 2002 and has been successful through all these years. RUF is not just a world known machinery producer name and the leader in briquetting technologies market. RUF is your trustful business partner as it has been a reliable and supporting partner for us during both periods of the sales peaks and during market depression. Its our luck to have the same business philosophy with our main business partner the RUF company. When both of you have the same aim, you achieve it faster!"

"We do not have one unsatisfied customer with a RUF machine and we have sold some 40 systems here in Australia and New Zealand. That in itself speaks volumes for the RUF company and its equipment. In our opinion the RUF briquette press cannot be matched from a performance basis. Although it is more expensive than most competing machines from a capital cost point of view, the ongoing trouble free performance and maintenance of the RUF machines put them well ahead of the opposition."

We always try to find the best possible briquetting solution. Our range has therefore been specifically developed for certain materials, production conditions or marketing purposes of the briquettes. Our experts will be happy to advise you with respect to processing several different materials with one briquetting machine.

Briquetting can be worthwhile even with very small quantities of chips. Briquette presses with a lower throughput should be considered here. Depending on the material, our systems can make economic sense in these cases too. Our specialists will be happy to advise you!

ruf 4-11 | ruf briquetting systems | ruf brikettierpressen und brikettiersysteme hersteller

ruf 4-11 | ruf briquetting systems | ruf brikettierpressen und brikettiersysteme hersteller

Unsere Our RUF 4-11 metal press series is best suited to small to medium quantities of metal chips. The value of your metallic residues can be increased through the process of briquetting. At the same time, expensive cooling lubricants are recovered, which our briquette presses squeeze out of the damp metal chips. The throughput is between 40 and 300 kg/hour, depending on the material to be briquetted. The briquette machines can be adapted to your individual requirements.

In addition to our briquette presses, we also offer additional peripheral equipment, such as conveyors, silos or chip hoppers. These allow the material flow of your chips to be optimised, and RUF peripheral devices can also be used to enable the briquetting of your chips to be fully-automated. Your briquette press will always be individually custom-made in accordance with your specific requirements.

ruf 1110+ | ruf briquetting systems

ruf 1110+ | ruf briquetting systems

Chips and residues that are produced in very large quantities (e.g. wood, agricultural residues, paper, textile dust, etc.) can best be formed into briquettes through the use of the RUF 1100+. To ensure briquettes of a consistently high quality and density, it is important that the water content of the starting material is below 15%. Briquette formats of either 240 x 70mm or 240 x 80mm are possible with this briquette press, again without the addition of any binding agents. A wide variety of options also enable the briquette press to be optimally tailored to customer requirements.

rap: briquetting press for metal | ruf briquetting systems

rap: briquetting press for metal | ruf briquetting systems

Smaller quantities of metal chips that are produced as a waste product in the metal processing industry can be briquetted with the RUF integration press (RAP). The value of metal residues can be greatly increased through briquetting with RUF chip presses. Another advantage lies in the recovery of cooling lubricants, especially oil. RUF briquetting machines for metal can be individually customised to customer-specific requirements.

In addition to our briquette presses, we also offer additional peripheral equipment, such as conveyors, silos or chip hoppers. These allow the material flow of your chips to be optimised, and RUF peripheral devices can also be used to enable the briquetting of your chips to be fully-automated. Your briquette press will always be individually custom-made in accordance with your specific requirements.

downloads | ruf briquetting systems

downloads | ruf briquetting systems

Here you can always find the most up-to-date documents and information about our company, our services and our material-specific briquetting solutions, to download free of charge as a PDF. If you have any questions about our briquette presses, our highly-experienced experts will be only too happy to help. Feel free to give us a call or send us an e-mail!

The recycling sector is an important segment of the market when it comes to the use of our briquette presses. In this flyer, we show you the diverse range of possible uses of our briquetting machines, using examples of various materials and showing how different customers use them.

Satisfied customers from the wood and metal processing industries are the best proof of the widespread and efficient use of our RUF briquetting machines. Read where and how RUF systems are improving everyday manufacturing and making it easier.

briquetting machines - we are #1 in briquette machine manufacturing

briquetting machines - we are #1 in briquette machine manufacturing

Our briquetting machines can be used for many applications, where the best known are briquetting lines for consumer logs and industrial boilers. Lately, we have been delivering many lines for the production of briquettes from agricultural residues. More specialized applications include briquette lines for MDF, Wood fines, bedding for animals and briquettes for biogas. The latest addition includes the production of briquettes for the production of carbonized briquettes. Take a look at some of our cases.

Consumer wood briquettes are the ideal products for replacing traditional firewood. Since the end of the 90s, the demand for consumer wood briquettes used for home heating systems, fireplaces and wood burning stoves have increased. Driven by the global focus on renewable energy, this demand is still growing. Compared to alternatives, briquettes are both convenient, profitable and sustainable.

With our briquetting machines, your waste will be turned into valuable renewable energy. In collaboration with our sister company RUF Briquetting System, we offer a wide range of customized solutions and a full line of consumer briquetting machines varying from low to very high capacities.

At C.F. Nielsen, we have specialized in mechanical briquetting. We offer high capacity lines ranging from 4-500 kg/hour and upwards, corresponding to wood waste of approximately 1.000 tonnes per year and more.

Testing of your raw material is essential, as raw material, even if it is the same species, varies from country to country and from customer to customer. By testing your actual raw material many potential difficulties will be avoided during start-up and production at your new briquetting plant.

Costs should not be the only factor to be considered, when evaluating a briquetting plant. For newcomers in the business of biomass, production might not seem complicated. Never the less, it is our experience that two customers with similar raw material can have a very different success rate in terms of profitability.

The moisture content of wood changes the calorific value of the latter by lowering it. Part of the energy released during the combustion process is spent in water evaporation and is consequently not available for any wished-for thermal use.

Raw material is the residue you are looking to use in your briquetting production. It is typically unprocessed material from either from wood or agricultural by-products. Examples such as straw, pineapple waste, sugarcane bagasse, birch, larch etc. can be used for briquetting.

The calorific or heating value is an important indicator of the quality of the pressed fuel briquettes. It measures the energy content of the briquettes. It is defined as the amount of heat evolved when a pressed fuel briquette is completely burnt and the combustion products are cooled. And the Gross Calorific Value, shortened as GCV, refers to the calorific value with the condensation of water in the latent heat, also known as higher heating value. Whereas during combustion, the heat of condensation of water contained in the fuel and formed during combustion will become unavailable because of the vaporization of the water. And then, the useful heating value is gained after the heat of condensation of the water being subtracted from the gross calorific value, which is referred to as the Net Heating Value or lower heating value.

Due to low level of lignin, it is not possible to make briquettes in bigger diameter than 75 mm without adding any binder. Although rice husks are perfect for briquetting, they also contain a high silica content, resulting in a high ash content. Briquettes from rice husk are most often used in boilers or furnaces with very high burning temperature to avoid a low silica melting point and sintering (crystallization) of ash.

Biomass briquettes are a biofuel substitute to coal and charcoal. Briquettes are mostly used in the developing world, where cooking fuels are not as easily available. There has been a move to use briquettes in the developed world, where they are used to heat industrial boilers in order to produce electricity from steam. The briquettes are co-fired with coal in order to create the heat supplied to the boiler.

used briquetting presses for sale. shengbo equipment & more | machinio

used briquetting presses for sale. shengbo equipment & more | machinio

Product Description charcoal briquette coal ball press machine Advanced technology, reliable quality, multi-purpose, strong pressure, suitable for large, medium and small enterprises to establish a certain produc...

Product Description Honeycomb coal charcoal briquette extruder making machine The structure and principle of honeycomb briquette machine is simple, divided into the body, rotation, feeding, punching, conveying fi...

Product Description Coal briquette press wood charcoal briquette making machine The structure and principle of honeycomb briquette machine is simple, divided into the body, rotation, feeding, punching, conveying ...

Shisha Charcoal Briquette Machine can press many different kinds of chips/tablets (circle, square, irregular, etc) by replacement of some spare parts.the finished products are circle, one side is concave and the ...

Screw Press Briquette Machine is a kind of economic and environmental friendly sludge dewatering equipment. It is a new type of sludge extrusion dewatering equipment by using the principle of screw extrusion, thr...

Metal Scrap Briquetting press is a kind of equipment whichcan press the metal scraps/filing and metal powder (such as Iron scraps, sponge iron powder, ironpowder, mill scale, copper scraps, copper powder, alumi...

What do you do with your metal scraps? If you let the scraps stored in your facility, and then hauled away to be disposed of, our briquetting press can turn your copper waste into an asset. Shengbo briquetters tu...

High Pressure Dry Powder Briquetting Machine is used for making lime powder, ferrosilicon powder, chromium powder, Refractory materials and other different fines which contain low content of water or no water.Th...

Product information Laboratory Used Small Heat Roller Press Machine For Battery Electrode 1 TMAX-JS-100L Hot roller press machine is a compact hot rolling press machine mainly serves for pressing samples in the l...

Product Description Hot Rolling Press Machine With 200mm Width Steel Rollers For Battery Making 1 TMAX-DR-H150-200 Lab Roll Press Machine is a compact precisionRoll Heat Press Machine. It has dual rollers of 15...

SHENGBOis located in Jiangyinnear Shanghaiin China. For more than 15years we develop and produce briquetting systems. When using a SHENGBObriquetting system you simplify chip handling and increase your produ...

What do you do with your metal scraps? If you let the scraps stored in your facility, and then hauled away to be disposed of, our briquetting press can turn your metal waste into an asset. Shengbo briquetters tur...

What do you do with your metal scraps? If you let the scraps stored in your facility, and then hauled away to be disposed of, our briquetting press can turn your metal waste into an asset. Shengbo briquetters tur...

ruf metal chip briquetting systems and machines | worksmate

ruf metal chip briquetting systems and machines | worksmate

Leader in hydraulic briquetting machines. A tailor-made briquetting system that meets your needs precisely, taking into account the material to be used , the required throughput and the production conditions.The briquetting machines are real all-rounder and is suitable for pressing Aluminium, Stainless steel, Mild steel, Cast iron, Copper alloy, Grinding swarf, Titanium and countless other metals.

The high-quality, dense briquettes, which have a defined residual moisture, offer better opportunities for marketing than loose chips. There is also a profitable side effect to briquetting aluminium chips cooling lubricants that adhere to the chips are efficiently recovered by our aluminium press. These cooling lubricants can then be reused after appropriate treatment.

The value of metal residues can be greatly increased with our metal press machine. The metal chip briquetting machine is a real all-rounder and is suitable for pressing aluminium, steel, cast iron, copper and countless other metals.

Briquetting is a suitable treatment method for de-watering or de-oiling wet metal chips. During the briquetting process, our metal chip press recovers cooling lubricants that adhere to the damp metal chips. Consumption of these expensive cooling lubricants is thereby significantly reduced.

Depending on customer requirements, we offer metal chip presses for throughputs between 30 and 5,000 kg per hour. The required throughput and briquette density will have an influence on the choice of the briquette format.

Our grinding sludge press forms briquettes from grinding sludge, recovering expensive cooling lubricants, such as oil or emulsion, in the process. These may actually account for more than 50% of the starting material.

The special briquetting technique used for grinding sludge is based on a special construction, developed by RUF, which has been technically adapted to deal with this particularly abrasive material. Due to its compact structure, the grinding sludge press can easily be incorporated into existing production processes and is suitable for 24h operation.

used briquetters for sale at phoenix equipment

used briquetters for sale at phoenix equipment

Used Komarek Greaves (Now part of Bepex) 50 HP Briquetter, reportedly a Model MS-75. Segmented pocket design, spare die pockets, missing motor.

Used Briquetter compactor, manufactured by KR Komarek, Model B300, 15" diameter x 2-7/8" wide rolls, pockets are 1/2" diameter, half sphere on one roll and smooth roll on second roll. currently less the 30 HP motor, equipped 7.5 HP horizontal feed auger, and 2.5 HP vertical feed auger. The unit will be offered reconditioned, cleaned and painted. Serial number B-357. Built 1976. No Controls. Previous use: Fertilizer pellets.

Used Bepex Hutt Roll Compactor/ Briquetter, Type L200/50P. Made in Germany, built 1979, Serial Number 10179. 50 mm x 200 mm diameter rolls. Feed hopper with 1 HP variable speed auger. Stainless steel feed hopper and auger. Main drive: 3kw(4 HP) variable speed gear reduced drive. With control panel.

Used Komarek Greaves (Now part of Bepex) 50 HP Briquetter, reportedly a Model MS-75. Segmented pocket design, spare die pockets, missing motor.

Used Briquetter compactor, manufactured by KR Komarek, Model B300, 15" diameter x 2-7/8" wide rolls, pockets are 1/2" diameter, half sphere on one roll and smooth roll on second roll. currently less the 30 HP motor, equipped 7.5 HP horizontal feed auger, and 2.5 HP vertical feed auger. The unit will be offered reconditioned, cleaned and painted. Serial number B-357. Built 1976. No Controls. Previous use: Fertilizer pellets.

Used Bepex Hutt Roll Compactor/ Briquetter, Type L200/50P. Made in Germany, built 1979, Serial Number 10179. 50 mm x 200 mm diameter rolls. Feed hopper with 1 HP variable speed auger. Stainless steel feed hopper and auger. Main drive: 3kw(4 HP) variable speed gear reduced drive. With control panel.

Phoenix Equipment buys and sells used, unused and reconditioned Briquetters, manufactured by: Komarek Greaves, Puckmaster, CF Nielsen, RUF GmbH & Co, Bepex, Allis-Chalmers, Koppern, Hutt, SKB, Ferro-Tech and others. We buy and sell all models including the following Komarek B Model, Komarek DH Model, Komarek Laboratory Roller Model, Puckmaster LTL Pucker Series, Puckmaster 225 Series, Puckmaster 275 Series, Bepex MS Roll Compactors. We have the right briquetting equipment in production and pilot scale sizes for various applications such as: wood/non-wood biomass; metal; sludge recovery; scrap metal; fines; and dry briquettes. Briquetters can be used in the chemical, mining, non-metallic and metallic minerals, crushed wood and metal shavings processing industries. Typical applications for briquetters are gypsum processing, charcoal processing, potash processing, maleic anhydride processing, tungsten processing, coal processing, kaolin processing, salt processing, water treatment chemicals, refractory material processing, metallic ore processing, barite processing, wood shavings processing. Generally, the briquetters we offer include hydraulic, spring loaded and mechanical rolls, double and quadruple rolls, pocketed or smooth face rolls and segmented or single piece rolls. Fill out our quick and easy quote form for more information about our Briquetters inventory.

Phoenix Equipment buys and sells used, unused and reconditioned Briquetters, manufactured by: Komarek Greaves, Puckmaster, CF Nielsen, RUF GmbH & Co, Bepex, Allis-Chalmers, Koppern, Hutt, SKB, Ferro-Tech and others. We buy and sell all models including the following Komarek B Model, Komarek DH Model, Komarek Laboratory Roller Model, Puckmaster LTL Pucker Series, Puckmaster 225 Series, Puckmaster 275 Series, Bepex MS Roll Compactors. We have the right briquetting equipment in production and pilot scale sizes for various applications such as: wood/non-wood biomass; metal; sludge recovery; scrap metal; fines; and dry briquettes. Briquetters can be used in the chemical, mining, non-metallic and metallic minerals, crushed wood and metal shavings processing industries. Typical applications for briquetters are gypsum processing, charcoal processing, potash processing, maleic anhydride processing, tungsten processing, coal processing, kaolin processing, salt processing, water treatment chemicals, refractory material processing, metallic ore processing, barite processing, wood shavings processing. Generally, the briquetters we offer include hydraulic, spring loaded and mechanical rolls, double and quadruple rolls, pocketed or smooth face rolls and segmented or single piece rolls.

Phoenix Equipment buys and sells used chemical process equipment and plants for relocation. Our industry focus includes process plants and machinery in the chemical, petrochemical, fertilizer, refining, gas processing, power generation, pharmaceutical and food manufacturing industries. We have extensive experience acquiring processing plants and process lines that require the execution of complex dismantlement, demolition and decommissioning projects. Based in Red Bank, New Jersey, USA, we have team members located in China, India, Germany and relationships throughout the world.

Why Use Phoenix for Your Plant Dismantling & Plant Relocation Needs A Common Plant Liquidation Scenario Your company has made the tough decision to close a plant. This plant was running for years, and the company paid a lot to have it built, paid everyones salaries, and maintained or even modernized all of the production assets over the plants life but the plant needs to be sold off for one reason or another. Your company has called upon you to recover as much dollar as you can to help keep the organization alive, and better yet, healthy, in what is a constant battle in the marketplace. Youve either: Have spent months, maybe even years trying to find a buyer that would operate the plant in place, without any success, while the plants assets lose value every passing day. Or, you cant sell it to another company, as you are one of the few suppliers of the product the plant makes, and you dont want to create a competitor, or improve a competitors position. Or, the plant is on leased propert

Hydrogenation: Major Applications Hydrogenation is a billion-dollar industry. Hydrogenating means to add hydrogen to something. According to Haldor Topsoe, hydrogenation comprises 48% of total hydrogen consumption, 44% of which is for hydrocracking and hydrotreating in refineries , and 4% for hydrogenation of unsaturated hydrocarbons (including hardening of edible oil) and of aromatics, hydrogenation of aldehydes and ketones (for instance oxo-products), and hydrogenation of nitrobezene (for manufacture of aniline). Hydrocracking & Hydrotreating Industrially, hydrotreating and hydrocracking are performed in down flow trickle bed reactors, where the gas and the liquid feed are sent concurrently through a fixed bed plug flow reactor. Although the flow pattern in the reactor can be reasonably approximated, the observed kinetics in such a trickle bed reactor are quite often affected by minor unplanned oscillations in the flow. How the gas and liquid collide and mix together affects the end prod

Thermoplastics A Focus on Polyethylene & Polypropylene Thermoplastics are a class of polymers, that with the application of heat, can be softened and melted, and can be processed either in the heat-softened state (e.g. by thermoforming) or in the liquid state (e.g. by extrusion and injection molding). Over 70% of the plastics used in the world are thermoplastics, and the two most commonly used thermoplastics are both olefins, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond. These two olefins are polyethylene and polypropylene. Polyethylene Polyethylene is a tough, light, flexible synthetic resin made by polymerizing ethylene, chiefly used for plastic bags, food containers, and other packaging. It may be of low density or high density depending upon the process used in its manufacturing. It is resistant to moisture and most of the chemicals. It can be heat sealed and is flexible at room temperature (and low temperature), and in additional to its material properties,

ruf sz1/sz1+ wood briquetting system - akhurst machinery ltd

ruf sz1/sz1+ wood briquetting system - akhurst machinery ltd

The RUF SZ1 / SZ1+ briquetting system presses loose wood chips into compact RUF briquettes. The high pressure ensures a constant high quality and density. As an entrylevel model of our wood presses, the SZ1 / SZ1+ is available in a standard design with proven RUF technology for small capacities (20 60 kg/hour).

The basic requirement for the briquetting of wood/paper on the SZ1 is a water content of <15% and a particle size of < 30 mm. Due to the absence of a precharger, the capacity is strongly influenced by the chip form. From our experience, the capacity of the SZ1 with wood chips range from 30 kg/h to 50 kg/h, depending on the customers material. A definite statement on the capacity of the machine and the briquette quality is only possible after a briquetting test with original material at RUF. Functional description SZ1 Series Unlike our mould models and shutter models, the SZ1 does not produce single briquettes, but a briquette string. A feeding screw conveyor transports the material into the press channel. The collet consists of two semicircular plier parts, through which the material is pressed. Compaction is achieved by the pressure of the press channel and the two pliers parts that are firmly pressed against each other (friction force). As soon as the press piston has reached its pressure, the upper pliers part opens and relieves the material. The briquette string is pushed out to the front.

A feeding screw conveyor transports the material into the press channel. The collet consists of two semicircular plier parts, through which the material is pressed. Compaction is achieved by the pressure of the press channel and the two pliers parts that are firmly pressed against each other (friction force).

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aluminium cycle: machining, briquetting, melting - ruf briquetting case study

aluminium cycle: machining, briquetting, melting - ruf briquetting case study

Aluminium chips are produced throughout the entire product creation process; during the surface treatment of cast bolts and rolling ingots, during profile, plate and sheet production as well as the machining of components. Depending on whether they are produced by milling, turning, grinding or sawing, the chips, which are often wet, vary in form and properties; wool-like, spiral, rough, fine etc. What they all have in common is: they will be re-melted, whether in a Remelter or a Refiner. This phase describes both: The end and the new beginning of the eternal Aluminium-Recycling-Cycle.

But what are the key considerations in detail? Loose chips have a large volume at low weight; so they display low bulk weight, typically lying between 140 to 250 kg/m3. This effects significant costs for storage as well as transport, both internally and externally.

In order to react against this, the chips must be pressed. This is where the applied technology is of high importance. RUFs machines can compress to a level of 2,200 to 2,400 kg/m3 (and in individual cases these figures may be exceeded) when required. As a comparison: the density of solid aluminium lies, on average, at 2,700 kg/m3.

Chips are created in Rolling mills through the milling off of the casting surface. So-called edge trimming shavings are also created during the machining of sheets, coils or foils. Briquetting applies for either form. When the company has an affiliated melting works, the pressed aluminium will be conveyed directly there (highest added value). Otherwise they will be stored and sold on the scrap market.

On account of the high density when compared to loose chips, storage and transport costs are reduced by the use of briquettes. Furthermore, briquettes achieve higher sales revenue because they are better suited to the melting process.

Pressing plants produce chips primarily through reprofiling and sawing of casted round bolts as well as finished extruded sections. As very few of these types of companies are affiliated with a melting works, storage and transport costs are extra significant.

Another factor above all in achieving higher sales revenues is that Stamping/pressing plants dispose of single origin chips with a clearly defined composition. This means they can be used as alloying additions during the melting process, which is very much in-demand in the melting plants as it means they have to purchase less, very expensive, alloying elements and aggregates.

Machining companies are to be found in many branches like e.g. in the Automobile industry, Aerospace and Mechanical engineering. Handling chips is daily business for these companies, and it has the association of a waste product of machining. The advantages of briquetting regarding storage and transport costs also exist here, just like the optimisation of sales revenues, because of the volume reduction of the chips after

RUFs systems are equipped with an integrated catchment device for fluids. This ensures that your storage area remains clean, which is very much in alignment with orderly production processes and environmental protection in practice. Personnel costs are reduced and work safety levels are increased when the machine works automatically and only the conveyance of chips or briquettes requires service personnel.

Remelters and Refiners are smelters, which are differentiated by e.g. the products they manufacture. Remelters mostly produce wrought alloys as wire, bolts and rolling ingots. Refiners produce casting alloys in the form of ingots. Both utilise chips, amongst others. The difference between using loose chips or briquetted aluminium for remelting is, in both cases, significant.

Because under the effect of flames, the light material burns-off very quickly instead of melting. And as the relation between surface area and density is particularly big with chips, a lot of material is lost through this burn-off. Moreover, the large exposed aluminium surface area of the chips mean a high tendency to oxide formation. This leads to further losses in the melting furnace in the form of dross.

A further problem factor in the melting of aluminium: when the liquid metal comes into direct contact with other liquids such as cooling lubricants, an almost explosive reaction takes place. Therefore, the factor of residual moisture is important.

Loose chips often have a moisture content of 20 per cent and more. If they are not briquetted, the chips must go through a centrifuge and further drying systems in order to remove the residual moisture. In contrast briquetting is significantly more economically effective, especially when high quality systems are used. An appropriately high pressing power reduces the moisture content down to between three and five per cent. If the briquettes are subsequently stored in a dry place, this reduces to values fewer than two per cent. And the briquettes can be safely and efficiently melted.

Because of burn-off and oxidation, loose chips cannot be used in some melting furnaces or only after very cost intensive treatment. The melting process of loose chips in a rotary drum furnace requires the addition of salt. The inherent problem here is: the left over salt slag has to be disposed of or undergo re-treatment, which is very expensive.

Hearth type melting furnaces can also be equipped with so-called Vortex-installations, which can be operated with electromagnetic or mechanical pumps. This leads to the chips being stirred into the molten mass. This functions pretty well, but it requires a lot of effort. And apart from the purchase costs, the installation needs space, regular maintenance and there are also extra personnel and operating costs involved, particularly due to the high wear factor.

Independent of which furnace technology is implemented, the melting process functions at its best with highly compressed briquettes. What is decisive is the density of the briquettes, which lies between 2,200 and 2,400 kg/m3.

The density of liquid aluminium is, on average, around 2.350 kg/m3, depending on the alloy. Therefore the briquettes hardly float at all, which means burn-off and oxide formation are reduced to the minimum. This is the reason why Refiners generally report a yield at least two per cent higher. Some have confirmed five to seven per cent more metal yield.

Whether Rolling mill, pressing plant, Machining company or smelters; what is decisive is always using a needs based, high quality briquetting system. RUF has an appropriately large range of systems with customised automation and further accessories. Moreover, the numerous users of RUF systems confirm the high level of robustness, reduced maintenance costs as well as reliable service. This means ROI is achieved often within one or two years.

As a leading innovator, the Bavarian company invests regularly in the optimisation of its systems and cooperates with research institutions and universities. Furthermore, RUF works intensively together with their customers. RUF offers the companies the opportunity to test the briquetting of their own chips in in-house test systems and/or they rent them briquetting machines. This is a basis for RUF engineers to optimise system solutions for individual cases and it is a way of introducing new areas of application.

RUF briquetting systems: innovative, individual, international. Being a machine builder and the market leader in the field of briquetting, the Ruf GmbH & Co. KG has successfully been specialising in the development and production ofbriquetting ...

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