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Pyrite is the main mineral resource for obtaining iron and sulfur. According to the different mineral properties, the mineral processing process is different, and the mineral processing equipment used is also different. However, the basic mineral processing process is inseparable from the crushing system and the grinding system. , mineral processing system and dehydration system.
Take a certain pyrite ore beneficiation process plan as an example. The beneficiation process of this ore concentrator is a process of priority flotation of sulfur-tailings magnetic separation to recover iron. The workshop consists of a crushing system and a grinding and flotation system. , magnetic separation system and dehydration system. The equipment required for pyrite is introduced below for these parts.
The crushing adopts the three-stage one closed-circuit process. The raw ore is fed into one stage of the crusher for coarse crushing, and the crushed materials are screened. The material above the screen returns to the first stage for crushing, and the material under the screen enters the second stage for fine crushing. After the fine crushing, the products are also screened. The material above the screen returns to the second stage for crushing, and the material under the screen is qualified material (the particle size of the final crushed product is controlled at 12mm) , there is a feeding machine feeding the grinding system. The pyrite equipment required in this link includes crushers and vibrating screens.
Crusher: A jaw crusher is used in the first stage of coarse crushing, a standard cone crusher is used in the second stage of medium crushing, and a short crusher is used in the third stage of fine crushing. head cone crusher.
Screening machine: Use circular vibrating screen.
The grinding adopts the two-stage closed-circuit process. The first-stage ball mill and hydrocyclone form a closed-circuit system, and the classification particle size is -200 Mesh 60%, the two-stage ball mill also forms a closed-circuit system with a hydrocyclone, and the classification particle size is -200 mesh 90%. The pyrite mineral processing equipment required at this stage includes ball mill and cyclone.
Ball mill:The lattice ball mill is used as one stage of coarse grinding, and the overflow ball mill is used as the second stage of fine grinding;
Cyclone:Select separately Cyclone groups with different classification particle sizes.
This link mainly selects sulfur through flotation, using one coarse, one sweep and two fine operations. The medium ore is returned in sequence. The product is pyrite concentrate, which is floated. The tailings enter the magnetic separation and iron separation operation. The pyrite mineral processing equipment required at this stage includes: flotation machine and stirring tank. In addition to the equipment, flotation reagents are also used to assist in flotation.
Flotation machine: Mechanical agitator flotation machine, air-filled agitator flotation machine kind.
Stirring tank: Ordinary stirring tank, high-efficiency stirring tank and chemical stirring tank.
Flotation reagents: Collectors, inhibitors, etc.
The magnetic separation process adopts the strong magnetic - regrinding - strong magnetic separation process, and uses a strong magnetic separator to perform a coarse and sweep strong magnetic separation operation. The magnetically separated comprehensive concentrate enters the three-stage closed-circuit grinding operation consisting of a mill and a cyclone. The grinding fineness is -0.43mm, accounting for 83% of the mass fraction. The overflow of the cyclone enters the second-stage coarse and sweep strong magnetic separation operation. The comprehensive concentrate of the second-stage magnetic separation enters the flotation operation for desulfurization. The product in the tank is qualified iron ore concentrate. The pyrite equipment required for this link is: strong magnetic separator and weak magnetic separator.
Strong Magnetic Separator:High Gradient Magnetic Separator.
Weak magnetic separator: Magnetic drum.
The concentrate dehydration process of the pyrite concentrator adopts two-stage dehydration of concentration + filtration, flotation of sulfide concentrate and The iron concentrate after magnetic separation is concentrated and filtered to obtain the final sulfur concentrate and iron concentrate; the tailings dehydration process uses a cyclone + concentrator + filter for dry drainage dehydration, and the overflow water and filtered water are returned After recycling in the dressing plant, the final moisture content is 15%~18%. The pyrite equipment required in this link includes: concentrator, cyclone, filter press, etc.
Concentrator: High-efficiency concentrator is used for concentrate dehydration operation, and deep cone concentrator is used for tailings dehydration operation.
Cyclone: A cyclone group is often used to complete the tailings dehydration operation.
Filter press: The disc filter is responsible for completing the concentrate dehydration operation, and the chamber filter press is responsible for completing the tailings dehydration operation.
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