There are a number of molybdenum oxide minerals in the upper molybdenum deposits, such as calcium molybdate ore, lead ore molybdenum, molybdenum China. There are three types of molybdenum ore:

1 single molybdenum ore. Mainly the recovery of molybdenite, rare mineral content of other metals;

2 copper molybdenum ore. Copper is mainly recovered, and the content of molybdenite is very low, generally around 0.01%~0.1%;

3 molybdenum ore, sometimes copper, molybdenum ore, the content of molybdenum and tungsten in the ore reaches the industrial recovery value, and the tungsten ore is mainly scheelite .

Molybdenum ore is one of the most easily floatable minerals. The crystals are scaly and belong to non-polar minerals and are easily floated by non-polar hydrocarbon oils. Molybdenite can also be floated by ionic collectors (such as xanthate), but it is rarely used in practice. Because the ionic collector can simultaneously float other sulfide minerals. Molybdenite is more difficult to oxidize and is more difficult to suppress. Commonly used inhibitors are dextrin and starch. The flotation regulator is commonly used in soda. Water glass is often used to disperse when it contains slime. Oxidized minerals of molybdenum are rare and difficult to float.

1. Flotation of a single molybdenum ore Single molybdenum sulfide flotation should pay attention to the following characteristics:

1 Molybdenum ore is very brittle and must be prevented from being crushed;

2 Molybdenum ore is often aggregated, and the aggregate can be separated from the gangue mineral by grinding to 0.5~0.6mm. In order to completely dissociate the molybdenum ore in the aggregate, it must be ground to 90% to 95% up to 200 mesh. In practice, the grinding and refining process of coarse concentrate re-grinding is often used;

3 The original ore grade is very low, and the quality of molybdenum concentrate is high, which must be selected several times;

â‘£ To prevent flotation of sulfide minerals and sludge contaminated concentrates, common practice sulfide, cyanides, chromates, etc. heavy inhibition sulfide minerals.

2. Flotation of copper-molybdenum ore

Many types of copper ore in the world contain molybdenum. Although the amount of molybdenum is very low (0.01%~0.1%), the comprehensive recovery has great economic value. About 20% of China's molybdenum is recovered from copper-molybdenum ore. The flotation of copper-molybdenum ore generally adopts copper-molybdenum mixed flotation, and the mixed concentrate is separated again. Therefore, inhibition of copper sulfide is the key. There are many methods for the separation of copper-molybdenum mixed concentrates. Sodium sulfide is mainly used to suppress copper and iron sulfides, which are mainly flotation molybdenite. It can also be used with (sub)ferricyanide or water glass or Knox reagent. Copper floating molybdenum. When the flotation of the amine salt is used, the slime has a significant effect, because the slime can adsorb a large amount of the amine agent and adhere to the mineral surface, so that the flotation selectivity is greatly reduced. Therefore, it is necessary to perform pre-desilting or to use a dispersing agent to overcome the adverse effects of the slime.

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