The equipments of mineral processing cover feeder, crusher, ball mill, classifier, vibrating screen, rocking bed, magnetic separator, mix tank, flotation machine and so on. The specific mineral processing flow is as follows: The extracted ore should be crushed by jaw crusher initially. When it gets the reasonable fineness, it is transported into ball mill by elevating conveyer and feeder, and is milled by ball mill. The subtle milled ore gets the next procedure: Classification. There is a theory that if the weights of solid particles are different, the sedimentations will be different, and the mixed ore can be classified by screw classifier. The classified ore gets into magnetic separator. Since the specific magnetization coefficients of ores are different, the magnetic substance of mixed ore is separated from others with magnetic and mechanical force. The mineral matter, which has been separated by magnetic separator initially, is transported into flotation machine by conveyer, and different medicines are added according to different characteristics of ore, so that the needed ore is separated from others. Since the separated ore are wet, they should be dewatered by thickner initially, and dried by dryer.
Working Principle of flotation separating process:
1) After intensively mixed, the pulp and medicaments are fed to the groove bottom of the first tank.
2) When the impeller of the flotation machine begins to rotate, negative pressure is formed, making the air and pulps at the bottom and middle part of the tank enter the mixing zone. The pulp, air and medicaments are then mixed in the mixing zone.
3) As a result of the centrifugal force, the blended pulps are lead to the mineralization area. The air is in full contact with the coal particle and forms mineralized bubbles which are then equally distributed to groove wall and removed upward to the separation region. These bubbles then gather as a foam layer and are discharged by the scraping tool. Finally, clean coal foam is produced by this flotation machine.
4) Coal particles that are not mineralized will be remixed, re-mineralized and re-separate through the recycle hole and the upper intake.
5) The left pulp that are not sucked by the impeller enters into the third tank after going through the process of first tank Thus, flotation machine runs in cycle and discharges ore pulp through the tailing box of the floatation machine.
3. Every cell owns three functions: air absorption, slurry absorption, and floatation separation, and the cells form a floatation separation loop by itself without any auxiliary equipment, and is allocated horizontally, which favors the change of flow.
4. The circulation of mineral slurry is reasonable, and ore flotation flotation separation process can avoid the disposition of coarse sand to the largest extent.
5. There is self-control device on the surface of mineral slurry, so ore flotation flotation separation process is easy to adjust .