Flotation characteristics of molybdenum ore

Single molybdenum ore

Liaoning Yangjiazhangzi as molybdenum, Shaanxi Jinduicheng molybdenum mine, Henan Luanchuan Molybdenum Mine, Ruyang molybdenum ore, molybdenum ore Yechangping, Jilin Montenegro molybdenum, Lanjiagou molybdenum ore, molybdenum ore Huangshan And Qingtian molybdenum ore is a single molybdenum ore.

Copper molybdenum ore

The molybdenite in the ore is symbiotic with various copper sulfide minerals, such as Dexing Copper Mine, Baoshan Copper Mine, Xiaosigou Copper Mine, Linjiang Copper Mine and Xianlin Copper Mine. Jinduicheng also belongs to this category.

Tungsten ore

Dan Zhonghui mining molybdenum and tungsten ore symbiosis, which wolframite symbiotic have Piaotang tungsten ore, tungsten ore pit Guanxi, Wenshui tungsten ore, tungsten ore down the mountain, West Huashan tungsten ore and tungsten ore and other cotton Figure nest; The mines that are symbiotic with scheelite include Luanchuan Molybdenum Mine and Shizhuyuan Tungsten Molybdenum Mine.

Carbonaceous copper molybdenum ore

This ore is also common in foreign countries, and the ore contains organic carbon and carbonaceous shale . The molybdenum deposit in Jinkouling is symbiotic with the carbon-bearing siliceous shale. The carbon rock is black, dense, massive, and firm. It has a carbon content of 2.94% and a density of 2.73 g/m 3 . The carbonaceous material is dispersed. , not combined with minerals. The carbonaceous shale is composed of microcrystalline quartz , fine carbonaceous particles, a small amount of ferrite sites, and argillaceous chlorite, and the carbon particle size is 0.0017 to 0.064. Carbonaceous shale and molybdenite are floatable, so carbon and molybdenum separation is required.

Vanadium uranium ore

Molybdenum is present in the ore as a secondary microcrystal, and the particle size is small and difficult to float. The carbonaceous vanadium uranium- molybdenum ore has a carbon content of 15% to 25% and is a pigment for local people burning kiln. This ore is very difficult to choose and can only be used for chemical beneficiation .

In fact, the ore dressing characteristics of each ore are also different. For example, in an ore of the Huangshan molybdenum ore, the ore of molybdenum ore has a grain size of only 10 μm, and it is difficult to fully dissociate molybdenum ore and gangue minerals.

Excessive fine pyrite contained in the ore, pyrrhotite or pyrite activated by secondary copper minerals is difficult to suppress. The clay in the ore adheres to the surface of the molybdenum ore, thereby affecting the floatability of the molybdenite. The fineness and type of gangue are related to the deterioration of molybdenite, chalcopyrite and chalcopyrite flotation. Fine clay kaolin below sericite impact effects, affecting both the sludge and below montmorillonite Al 2 [Si 4 O 10] (OH 2) · mH 2 O influence montmorillonite and kaolin When the content reaches a certain amount, the slurry is thick and its viscosity increases. The clay adsorbs water and solvates, and the water enters the clay floc. When the content of kaolin and montmorillonite reaches 50% and 70%, respectively, the volume of air in the flotation machine is reduced due to the increase of the viscosity of the slurry. .

When the flotation agent is added, the viscosity of the slurry also changes. The addition of chlorides of aluminum and iron contributes to the gelation of the fine mud, the viscosity of the slurry increases, and the flotation results deteriorate. The addition of sodium silicate and sodium sulfide contributes to the peptization of the fine mud, reduces the viscosity of the slurry, and is advantageous for flotation.

The addition of coarse tailings to the slurry improves the physical properties of the fines. The harmful effects of fine mud are its adsorption collectors . When the amount of sodium sulfide is too high, the harmful effects of clay and fine mud can be strongly reduced. This is because sodium sulfide is adsorbed on the surface of the fine mud, thereby reducing the adsorption of the collector on the fine mud.

Polyacrylates, especially low molecular weight sodium polyacrylates, are the most effective inhibitors of calcite and dolomite fines. Its main function is to adsorb on the surface of the fine mud, which can reduce the adsorption of the collector by the fine mud.

Excessive pyrite is also affected by the porphyry copper-molybdenum ore. The chalcopyrite-pyrite-formite ore is difficult to select because of the floatability of chalcopyrite and pyrite. In order to obtain high-grade copper concentrates and low-concentration molybdenum concentrates, it is necessary to maintain a considerable amount of residual lime or cyanide during copper selection or molybdenum selection, or steam heating at the time of selection to better Inhibition of a large amount of pyrite floating up.

In order to strengthen the inhibition of pyrite and improve the quality of copper concentrate, it is necessary to increase the content of pyrite in the middle mine, increase the cyclic load, and increase the cycle time of the slurry. In this way, the copper selection circuit can reduce the flotation activity of copper minerals. When a large amount of pyrite is present, the copper mineral tends to oxidize. After treatment with lime, it was found that pyrite inhibited copper minerals.

Studies on pure minerals have shown that in the presence of pyrite or in the presence of lime-treated pyrite, the floatability of either chalcopyrite or chalcopyrite is reduced, especially in the presence of lime treated with lime. Especially in iron ore.

In some cases, separation flotation is beneficial for the flotation of copper minerals. For example, in coarse ore feeding, coarse-grained crystalline pyrite segregates into +44 μm fraction, while copper mineral segregates to -44 μm. In the class. Accordingly, the grindability of the mineral and the metal distribution rate can be utilized to improve the quality of the copper concentrate and increase the recovery rate of copper.

In the molybdenum selection operation, similar to the above phenomenon occurs in the presence of pyrite, which increases the consumption of cyanide.

Studies have also shown that the rate of addition of collectors above a certain basic rate can seriously affect the floatability of pyrite. The floating rate of pyrite particles is slower than that of chalcopyrite particles. Although the floating rate of the pyrite-bearing chalcopyrite is faster than that of the completely dissociated pyrite, the chance of this continuum entering the copper concentrate increases. In order to reduce the floatability of pyrite, it is important to control the amount of xanthate added and the degree of dissociation of minerals.

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