Method for separating high-quality molybdenum concentrate from lead-bearing molybdenum ore

Abstract

The invention belongs to the field of mineral processing, and specifically invents a method for separating high-quality molybdenum concentrate from lead-containing molybdenum ore, which includes the following steps: grinding the lead-containing molybdenum ore to obtain a grinding product; Molybdenum flotation and then lead flotation are carried out to obtain molybdenum concentrate and lead concentrate; the molybdenum concentrate is subjected to wet lead reduction to obtain high-quality molybdenum concentrate. The invention adopts the preferential flotation process to change the process structure, adopts the effective lead inhibitor to change the medicament system, and adopts the wet leaching process to reduce the lead content of the molybdenum concentrate, thereby avoiding the low grade of the lead concentrate existing in the mixed flotation, and the lead content of the molybdenum concentrate It has the advantages of excellent separation effect of molybdenum and lead and easy operation in production.

Description

technical field [0001] The invention belongs to the field of mineral processing and specifically discloses a method for separating high-quality molybdenum concentrate from lead-containing molybdenum ore. Background technique [0002] Lead is an extremely harmful impurity in molybdenum smelting and its deep-processing products. Because the high lead content of molybdenum concentrate leads to chain environmental pollution, at the temperature of steelmaking, the lead in molybdenum oxide may be converted into toxic gases such as yellow lead and lead lead, polluting the ecological environment and affecting human health. Toxic and easy to accumulate in the human body. [0003] At present, the lead content of industrial molybdenum oxide used in steelmaking in many industrialized countries is not more than 0.05%, which makes it difficult for my country to export high-lead molybdenum oxide. Due to increasingly stringent environmental protection requirements, it can be expected that ...

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Problems solved by technology

The problem with this method is that the grade of the obtained lead concentrate is not high, and the second is that the lead content of the molybdenum concentrate is relatively high, resulting in a low comprehensive utilization rate of resources.

In addition, after regrinding the molybdenum-lead mixed concentrate, the molybdenum tailings can also be obtained by gravity separation to obtain lead concentrate. Although the grade of lead concentrate obtained by this method is high, the problem is that the recovery rate of lead concentrate in gravity separation too low

The molybdenum-lead priority flotation process has the advantages of simple process and easy operation in production. It is widely used in the flotation of polymetallic sulfide ores, and is also used in the industrial production of molybdenum-lead separation. However, there are still disadvantages of high lead content in molybdenum concentrates. Especially in the molybdenum beneficiation process of segmental grinding, the activity of lead minerals increases with the increase of grinding fineness, and it is difficult to suppress lead. Therefore, appropriate lead inhibitors are used to optimize the molybdenum-lead priority flotation process to achieve lead reduction in molybdenum concentrates. process control is necessary

[0005] At the same time, when the mineral particles are finely ground, the specific surface area of ​​the ore particles increases, and the huge surface energy makes the difference in the surface properties of the minerals smaller. In addition, the galena itself has good buoyancy, and it is difficult to make high-grade molybdenum concentrate in high-grade molybdenum concentrate by physical methods. Lead content up to standard

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