The molybdenum ore beneficiation equipment is often used in the ball milling process by ball mill or rod grinding. Flotation uses the preferred flotation method. Selected to produce molybdenum concentrate, coarse sweeping tailings to recover associated minerals or discarded. The molybdenum coarse concentrate is re-milled in two or three stages, and the final molybdenum concentrate is obtained in four or five times. The flotation agent of molybdenum ore uses a non-polar oil as a collector and a foaming agent. American and Canadian surfactant Xintex is used as an oil emulsifier. The nature of the ore, with lime to make adjustments agent, sodium silicate gangue as inhibitors, sometimes add cyanide or sulfide minerals inhibit other heavy metals. In order to ensure the quality of molybdenum concentrate, heavy metal minerals such as copper, lead and iron contained in molybdenum concentrate, calcium oxide and carbonaceous minerals need to be further separated. Typically using sodium sulfide or sodium hydrosulfide, cyanide or copper and iron ferricyanide system; by weight of lead chromate or inhibiting Knox. If an inhibitor is used, the impurity content is not up to the quality standard, and chemical beneficiation is required: secondary copper sulfide is leached with cyanide; chalcopyrite is leached with ferric chloride solution; galena with hydrochloric acid and trichlorochloride The leaching of the iron solution can reach the standard content. The gangue containing calcium oxide is easily muddy, so it is not necessary to over-grind the ore containing such gangue. Production is often added sodium silicate, sodium hexametaphosphate or an organic phosphate gel as gangue inhibitor or dispersant; CMC can also be added to inhibit the activated carbonate gangue. Finally, it can be leached by hydrochloric acid or hydrochloric acid plus ferric chloride solution. For the separation of carbonaceous minerals, it is first necessary to find out that the carbonaceous material is graphite , asphalt or coal . The floatability of these carbonaceous minerals is similar to that of molybdenum ore, but the density is small, and it can generally be removed by re-election; using hexapoly-sodium metaphosphate and CMC to suppress molybdenum float; or adding ferric chloride or water glass It is also effective to inhibit carbonaceous material with sodium hexametaphosphate; it is also one of the methods to remove organic carbon by calcination. It should be noted that the separation of all these carbonaceous minerals is currently unsatisfactory and is still a problem that has not yet been fully resolved. The SiO2 content in the gangue is too high, which is often the reason for affecting the grade of molybdenum concentrate. It has been determined that the SiO2 content decreases with the increase of the grade of molybdenum concentrate, and there is a tendency for mutual consumption. As long as the molybdenum mineral reaches the monomer dissociation fineness, the SiO2 content can generally fall below the standard. Adding activated carbon to the oil on the molybdenum surface, and adding CMC to inhibit the silicate gangue, the SiO2 content can also be reduced below the standard.
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Molybdenite easily cracks between layers in the structural sheet or plate form output, which is the natural floatability Hui copper ore good reason. Under suitable grinding fineness, the molybdenite crystal dissociation occurs between the S--Mo--S layers, and the hydrophilic S--Mo surface accounts for a small proportion.