In flotation mineral processing, the flotation machine scrapes the foams with minerals, to separate the valuable minerals and gangue minerals. In this period, the foam pulp contains solid, liquid and gas materials. The process by which the mineral particles in the pulp adhere to the bubbles is called bubble mineralization.
The process of bubble mineralization has certain selectivity to ore particles. In this process, the hydrophobic ore particles adhere to the bubbles and form a gas-solid complex. Hydrophilic ore particles are difficult to adhere to the bubble, remain in the pulp. For the flotation process, the adhesion degree of ore particles on bubbles has a direct impact on the flotation effect, so improving the degree of bubble mineralization is one of the key factors to improve the flotation process effect.
How can we improve the flotation mineral process effect by improving the bubble mineralization process? The more important factors include bubble size, mineral surface properties, mineral particle density and particle size, etc. We will explore their role in influencing the flotation mineral processing effect from these aspects one by one.
In the process of bubble adhesion to mineral, the bubble and mineral particles are close to each other and collide with each other. Only after several collisions can the bubble capture mineral particles. At least ten collisions occur between the minerals and the bubbles during the phase in which the grains and bubbles are realized. Reducing the bubble diameter can increase the probability of the collision between the bubble and the mineral particles, so that the mineral particles are easier to adhere to the bubble, and the mineralization process is easier to carry out.
In production practice, the size of the bubble should be determined according to the size of the mineral particles. When the mineral particle size is fine, the bubble size can be appropriately reduced, but not too small, otherwise the recovery rate and concentrate quality will be reduced, so as to increase the collision probability between the bubble and the mineral, so as to improve the flotation mineral processing effect.
The mineral surface property here mainly refers to the wettability of the mineral surface, which determines whether the mineral can carry out selective adsorption, that is, whether the mineralization process can be completed. Generally, surface wettability is determined by the structural properties of minerals. The worse the surface wettability is, the stronger the hydrophobicity is, and the better the natural floatability of minerals is. For this mineral, bubbles easily displace the hydration film on the surface of the mineral, allowing it to adhere to the surface of the bubble in a stable manner, thus forming bubble mineralization.
In general, in the determination of mineral composition, the floatability of constituent minerals can be compared according to their different surface wettability. When the difference of surface wettability between useful minerals and gangue minerals is relatively small, we can enlarge the difference of floatability between them by adding suitable medium adjustment agent and collector, so that one of them can adhere to the bubble more easily, which is convenient for flotation mineral processing.
When the mineral attaches to the bubble, the bubble rises to the surface of the pulp and enters the foam product. The bubble capacity is limited, how to ensure that mineral particles do not fall off the bubble surface from the time they are attached to the slurry surface until they are scraped into the foam tank?
When the mineral particles adhere to the bubble, the forces on the mineral particles include the buoyancy of the bubble, the gravity of the ore particles themselves, and the adhesion between the mineral and the bubble. Therefore, in addition to the wettability of the mineral surface, mineral density and particle size are also important factors in this process. After analysis, it is not difficult to find that the adhesion and buoyancy of mineral particles should be greater than their own gravity when they rise to the foam layer. Therefore, for mineral particles, under certain gravity conditions, the smaller the density of the mineral, the larger the diameter of the mineral particles that can be flotation. Therefore, for minerals with poor wettability and low density, the grinding fineness of these minerals can be appropriately relaxed during flotation mineral processing, such as graphite, molybdenite and so on.
Above, we explained how the bubble mineralization influences the flotation mineral process from three aspects. In fact, the above factors are some controllable aspects, and there are many factors that can affect the flotation effect, such as the hydrodynamic morphology in the flotation machine, the mechanism of flotation agents and the right amount of addition. For some complex ores, in the development of the process, do not mechanically follow, according to its ore properties, through the test to determine the appropriate process and its parameters is a more scientific and reasonable means, you can consult the processing equipment manufacturers with the qualification of mineral processing test, the ore process, to avoid economic losses and resource waste.
According to the different properties of phosphate ore, phosphate flotation technology has flotation process, gravity separation, scrubbing and mud removal; chemical leaching, combined beneficiation; photoelectric sorting, magnetic shield method, in which flotation process is common widely used phosphate rock sorting process, including direct flotation, reverse flotation, positive flotation process, and double reverse flotation process.In the reduction process, jaw crusher, impact crusher, and cone crusher are indispensable crushing plants. In the beneficiation process, there will be many other types of equipment applied such as classifier, screening machine, magnetic separator, sand washing machine and dryer etc. All these equipment consist of a whole complete production line.
The process is generally used for the classification of low-grade phosphate rock, including the processing of of siliceous and silicon, calcium phosphate and calcium magnesia phosphate.The process must have a strong inhibition inhibitors used in conjunction with in order to get satisfactory results, is mainly used in the phosphate rock materials and fine disseminated gangue minerals.
Direct flotation inhibits gangue minerals by effective inhibitors, and the phosphorus mineral is enriched in foam by collecting agent. This process is suitable for low grade phosphate ores including magmatite type apatite and sedimentary metamorphic type phosphorite ore.
Mainly used for the separation of phosphate and dolomite; dolomite is collected with fatty acid collector in weak alkaline medium, and the phosphorus mineral is enriched in the groove. The biggest advantage of reverse flotation process is the realization of the normal temperature flotation.
In alkaline conditions, double-reverse flotation makes the silicate surface positively charged, and the anionic collector separates minerals meaning floating dolomite firstly, and then reverse floating silicate; the product is heavy concentrate in groove; the production line can be carried out at normal temperature and coarse grain condition.
Production situation:Usingcoarse jaw crusherto doprimary crushingat first, then fine jaw crusher will do secondary crushingto make sure the materialsarein line with the ball mill feedingrequirements. Put the materialsinto the ball millto do grinding, after that using spiral classifierto classify the qualified materials. Next is adopting flotation machine to doflotation, then doing initial concentrationby high efficiency thickener, the raw materialsof phosphate oreneeded for production are obtainedafter drying.
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Taguta, Jestos, Kebone C. Teme, and Portia Ngobeni. 2020. "The Role of Gangue Mineralogy on Flowsheet Development in Fluorite Processing" Minerals 10, no. 3: 237. https://doi.org/10.3390/min10030237
Based industry line development needs of manufacturers, HCMilling(Guilin Hongcheng) tailored to the design of the selection of vertical roller mill configuration options for customers, is conducive to turning waste into treasure and creating value together.
Coal gangueis a solid waste produced by coal mining, not easy to burn.If coal gangue is allowed to pile up, not only occupy a large amount of land, and will emit sulfur dioxide and other harmful gases. This will lead to a decline in water quality in the region, the formation of acid rain and other environmental hazards, is a major scourge of air pollution. And it will it under certain conditions spontaneous combustion, triggering an explosion or collapse accident, bringing safety hazards to local residents.
The vertical roller mill is a special grinding mill equipment to meet the recycling value of industrial solid slag, and is also a tailor-made increase in production for HCMgenerating income grinding mill machine. It integrates breaking, grinding, grading, drying and conveying into one. It has high grinding efficiency, energy saving and low consumption, and high grading efficiency. It has a scientific design structure, and the materials it can grind are high humidity materials, dry materials, hard to grind materials and easy to grind materials, it is the type of grinding A wide variety and range of specialized equipment.
Pulverizing field:It is designed for various non-metallic mineral materials with Mohs hardness below grade 7 and humidity within 6%. The mill is widely used in electric power, metallurgy, cement, chemical industry, rubber, coatings, ink, food and medicine and other production fields.
Performance characteristics:It integrates drying, grinding, grading and conveying. It has the advantages of high efficiency of grinding, low power consumption, large feed size, easy to adjust the fineness of products, simple process flow, small footprint, low power consumption, high efficiency and low cost. Low noise, small dust, easy to use and maintain, low operating costs, less wear-resistant material consumption and other characteristics.
What is the price of the complete set of equipment for coal gangue grinding line? The price of the mill equipment is closely related to many factors, such as the fineness of the project, capacity, and where it will be installed. Only by understanding these needs before the sale, can we customize a set of reasonable production line program, matching the price of the mill more in line with the Customer's production needs.
If you want to processcoal gangue solid residue, welcome to learn about the special vertical roller mill coal gangue grinding mill production line. HCMhas a wealth of experience in mechanical processing and manufacturing, the development of vertical roller millis a new generation of energy-saving environmentally friendly powder mill equipment. More detail please contact:
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There are all kinds of crusher for pyrite crushing. Like jaw crusher, cone crusher and grinding mill. These crusher and classifier, magnetic separator, floatation separatorand some auxiliary equipment such as feeder, elevator and belt conveyor can be composed of a pyrite production line. In the primary crushing, you can use jaw crusher. Shanghai Shibangs production of PE series jaw crusher has many advantages. Like simple structure, easy maintenance, stable performance, and high crushing ratio. In the second crushing, you can use cone crusher.
CS cone crusher of Shanghai shibang also has many technology advantages. Like high yields, high grade final products, long-playingstable operation of machine, overload protective system and easy to control discharging size.Our jaw crusher and cone crusher also have widely application. Jaw crusher can be used in various materials processing of mining &construction industries, such as it is suit for crushing granite, marble, basalt, limestone, quartz, cobble, iron ore, copper ore, and some other mineral &rocks.CS series cone crusher is applied to cement mill, mining, building construction, road &bridge construction, railway construction and metallurgy and some other industries. Materials like iron ore, granite, limestone, quartzite, sandstone, cobblestone and some others are easily crushed by cone crusher. Ball mill for pyrite crushing
The ball mill also is key equipment in pyrite grinding.All aspectsCalculation shows thatthe discharging size of final production which use ball mill can get best effect. Shanghai Shibang production has many advantages which other ordain grinding mill doesnt have. It is suitable for grinding material with high hardness, the shape of the final products is circular,with no pollution for the powder and stable performance andeasy installation,also capacity and fineness can be adjusted by adjusting the diameter of the ball.
As a kind of mineral resource, pyrite plays an important role in many areas. There are two methods for pyrite mineral processing which are gravity separation and flotation separation. Gravity separation is often used for processing medium particle disseminated pyrite ore with good separation performances. The specific gravity of pyrite is higher, which can reach to 4.9-5.2. Floatation method is mainly for fine disseminated pyrite ore. The choice of pyrite ore crushing method is according to ores characteristic, beneficiation site etc.Most pyrite ores contain sulfur and iron combination with coarser disseminated particle size above 1mm. sorting out the sulfur and iron element, and selling them to sulfuric acid plant, you will get considerable profits.
Gravity separation that can process pyrite is the separation that is according to the proportion difference between the pyrite and gangue which is associated with pyrite. The specific gravity of pyrite is higher and the specific gravity of gangue is lower. Through crushing and grinding, intergrowth structure in pyrite will be destroyed.
The pyrite ores areput into jaw crusher for the primary crushing. Then, the ores will come into storage bin when they are crushed to a reasonable fineness. Through feeding machine transfer ores to ball mill equably. Then ball mill will crushing and grinding these ores. Mineral fines that ground by ball mill come into next procedure -grading. With the principle that solid particles with different gravity separation have different precipitation speeds in the liquid,the spiral classifier can be used for the cleaning and grading of mineral mixture. For susceptibilities of all kinds of minerals are different, when the cleaned and graded mineral mixture come through strong magnetic separator, magnetic materials in the mixture will be separated by magnetic force and mechanical force.Get in Touch with Mechanic