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Molybdenite is a natural hydrophobic mineral with good floatability. Unoxidized molybdenite can float only with a foaming agent. Collector primarily non-polar oil, such as coal oil, transformer oil, sulfur monoglycerides (Pf-100, Sytex) and the like. Sulfur monoglyceride is a kind of supercritical flotation activator with both trapping and foaming properties. It can enhance the infiltration and diffusion ability of hydrocarbon oils on the surface of the key minerals and improve molybdenite and its associated organisms. The floatability. In recent years, some new agents of floating molybdenum ore in China, such as:
F agent, the main component is hydrocarbon oil, it is a light yellow liquid, has good low temperature fluidity, good atomization, wide source, price is about 10% lower than kerosene, and the harvesting power is stronger than kerosene. kerosene.
TBC-1l4 can replace kerosene and pine oil. The production index is similar to kerosene and the cost is lower than kerosene. However, it is sticky with foam alone, and a small amount of coal gangue is needed to reduce its viscosity.
In addition, talc and serpentine in FT anti-floid molybdenum may be used if necessary; in floating molybdenum, TZK-3 may be used to suppress easy-floating impurities. Molybdenum ore is difficult to be inhibited, and starch, dextrin, animal glue, saponin, etc. can be used as inhibitors.
The molybdenum ore has a small hardness and is easy to be pulverized. The ore grade of molybdenum ore is low, so multi-stage grinding is often used in ore dressing , and the most demanding of fine minerals is high, and the number of selections is often 6-8 times.
The pH value is usually adjusted by lime or sodium carbonate. Water glass and dispersion suppressing gangue slimes, when the ore with carbonaceous shale, shale inhibition phosphate, sodium hexametaphosphate, with pine oil as a frother. Molybdenite ore often associated with calcium tungstate, yellow copper ore, pyrite, wolframite, bismuthinite, magnetite symbiotic. In the flotation of molybdenite, sodium sulfide, sodium cyanide, mercaptoethanol, sodium thioglycolate, glycerol or Knox reagent are commonly used to inhibit associated sulfide minerals. In the copper-molybdenum separation, potential adjustment or nitrogen is used instead of air as the flotation gas phase, and the alkali is less oxidized by sodium sulfide to reduce the amount of sodium sulfide.
2. Floatation of Jinduicheng Molybdenum Mine The ore is a large-scale medium-high temperature hydrothermal vein-disseminated ore deposit. Useful minerals are primary molybdenite, pyrite, chalcopyrite, magnetite, etc., associated with a small amount of rare elements rhenium, cobalt, and gallium.
At present, key elements such as key, copper and iron are recovered comprehensively. The principle flow is shown in Figure 11-17.
Coarse rough selection, ie, copper-sulfur mixed flotation: using kerosene as a collector and pine oil as a foaming agent.
Molybdenum selection, namely molybdenum and copper sulphide: Dingxant as a collector, pine oil as a foaming agent, sodium thioglycolate and phosphonox reagent as inhibitors. The grade of molybdenum concentrate is 52%~57%, and the recovery rate is 85%. The tailings are concentrated, dehydrated and dehydrated, and then floated to suppress sulfur.
Floating copper inhibits sulfur: a coarse two sweeps four fines, with Dinghuang or guanamine black medicine as a collector, pine oil as a foaming agent, lime, water glass and lignin as inhibitors. The copper concentrate grade is above 22% and the recovery is above 80%. Silver is enriched in copper concentrate, which contains about 100 g/t of silver. The tailings float sulfur. 
Magnetic separation magnetite: including magnetic rough selection, coarse concentrate regrind (fineness -38um accounted for more than 90%), two magnetic selection, one screening. The grade of iron concentrate is more than 62%, and the sulfur content is less than 0.2%.
Molybdenum ore flotation
Molybdenum ore flotation
1. molybdenum minerals and their floatability common pliers have mineral molybdenite (MoS2), Chinese molybdenum (MoO3), molybdenum lead ore color (PbMo0), molybdenum tungsten ore calcium [Ca (Mo, W) 04 ] and the like. Currently only molybdenite has a recycling value.
Floating sulfur: a thick one sweep two fine. Dinghuang is a collector and pine oil is a lagging agent. The sulfur concentrate grade is greater than 48% and the recovery rate is over 63%.