The flotation process introduction of talc
Industrial talc raw materials are generally divided into slippery stones and talc, is raw material for nearly 30 kinds of industrial production (chemical, pharmaceutical, ceramic). Talc sorting method is divided into two types: wet apply dry sorting and wet sorting, the dry sorting generally applicable to higher taste deposit, including hand-selected, electrostatic separation, magnetic separation, and photoelectric beneficiation; wet way is suitable for lower grade ore deposits, including flotation and rub both election law.
Low-grade talc ore generally needs by wet dressing to improve the taste. Wet beneficiation first crush and grind ore, talc and associated minerals monomer dissociation, then wet grinding, commonly used lattice-type ball mill grinding. After the wet milled talc (particle size generally less than 0.074mm accounted for 90% -95%) can enter the flotation step.
The flotation process is to make the talc slurry with concentration of 15% -10%; first send it to a stirring tank to add flotation agent, and then to the flotation machine, at the same time drum into the air to the flotation machine. The air was small bubbles dispersed in the pulp, due to the role of flotation agent, talc attaches to the bubble and float on the surface of the pulp in the form of foam, by scraper, it becomes the concentrate; the concentrate goes through concentrated, filtered , drying, and packaging and to be the finished product. The residual impurities in the flotation machine are discharged from the bottom. Due to the talc in the crystal means is completely symmetrical, so it is non-polar molecule, the performance of its surface is hydrophobic, and other minerals associated therewith have a hydrophilic surface, coupled flotation agent, can make the talc after floating election method successfully elect concentrate.
Flotation sorting talc is relatively simple, usually require only a rougher time scavenger, 2-4 times of choiceness and can be the final concentrate.
rotary kiln : http://www.ore-mills.com/rotary-kiln.html
rotary sieve : http://www.crusher-export.com/report/n119.htm