Micro-fine-particle-embedded-type lead oxide zinc ore dressing and smelting separation and utilization method

Abstract

The invention discloses a micro-fine-particle-embedded-type lead oxide zinc ore dressing and smelting separation and utilization method, and belongs to the technical field of mineral processing. Aftermicro-fine-particle-embedded-type lead oxide zinc ore is crushed, ground and subjected to size mixing, a combined inhibitor is added to synergistically inhibit gangue minerals, a copper ammonia complex is added for cascade activation of lead and zinc minerals, a combined vulcanizing agent is added to synergistically vulcanize lead and zinc oxide minerals, a combined collector is added to enable the vulcanized lead and zinc oxide minerals to be subjected to strengthened hydrophobization, gangue mineral in the ore are effectively thrown away, and lead and zinc flotation blended concentrates areobtained, then zinc minerals in the lead and zinc flotation blended concentrates are leached with sulfuric acid, and after solid-liquid separation, lead-containing leach residue and zinc-containing leach residue are obtained; and the lead-containing leach residue adopts methanesulfonic acid as a leaching agent, lead minerals are leached through heating stirring, and a lead-containing leaching solution is obtained. The technical problem that the micro-fine-particle-embedded-type lead oxide zinc ore is difficult to separate is economically and efficiently solved, the comprehensive utilization rate of lead and zinc resources is increased, and social, environmental and economical benefits are remarkable.

Description

technical field [0001] The invention relates to a method for dressing, smelting, separating and utilizing fine-grain embedded lead-zinc oxide ore, which belongs to the technical field of mineral processing. Background technique [0002] For a long time, lead-zinc smelting has been using sulfide minerals as raw materials. However, with the continuous consumption of limited lead-zinc sulfide resources, the existing lead-zinc sulfide minerals can no longer meet the growing demand for metals. Therefore, in order to ensure the retention of lead-zinc metals To reduce the dependence on foreign countries, the high-efficiency development and utilization of lead-zinc oxide ore has become inevitable. Lead-zinc oxide ore is an important lead-zinc mineral resource in my country, with rich reserves, but it has the characteristics of poor, fine, miscellaneous, and serious mudification, and this type of ore contains a large amount of soluble salts; compared with lead-zinc sulfide minerals, ...

AI Technical Summary

Problems solved by technology

[0002] For a long time, lead-zinc smelting has been using sulfide minerals as raw materials. However, with the continuous consumption of limited lead-zinc sulfide resources, the existing lead-zinc sulfide minerals can no longer meet the growing demand for metals. Therefore, in order to ensure the retention of lead-zinc metals To reduce the dependence on foreign countries, the high-efficiency development and utilization of lead-zinc oxide ore has become inevitable

Lead-zinc oxide ore is an important lead-zinc mineral resource in my country, with rich reserves, but it has the characteristics of poor, fine, miscellaneous, and serious mudification, and this type of ore contains a large amount of soluble salts; compared with lead-zinc sulfide minerals, lead oxide Zinc minerals have higher solubility and surface hydrophilicity, so a large amount of lead-zinc oxide mineral resources have not been fully exploited and utilized, and a considerable part of low-grade lead-zinc oxide ore is piled up near the mine after mining, which not only causes waste of resources, also cause environmental problems

[0003] Mineral dressing is an important method to enrich lead oxide ore, but due to the variety of minerals in lead-zinc oxide ore, the ore structure is complex, the associated components are unstable, and contain a large amount of activated quartz, calcite and soluble salt minerals, so lead-zinc oxide There are still some problems in the recovery of ore through the method of beneficiation

The pyrotechnic process can process the lead-zinc oxide ore with high lead-zinc grade and low calcium and magnesium content. When the calcium and magnesium content in the oxidized lead-zinc ore is high, there are a lot of problems in the pyrotechnic process, such as high alkalinity and viscosity of the material. large, high loss of lead and zinc, and large amount of additives; in addition, there are different degrees of lead vapor pollution in the recovery of lead and zinc by pyrolysis, and the environmental risk is relatively large

At present, the leaching process is commonly used to extract lead-zinc oxide ore. The leachate obtained after sulfuric acid leaching can directly extract metal zinc through solvent extraction or electrowinning process. When the calcium and magnesium content in the ore is high, the acid consumption is high and the impurity content in the leachate is high. Higher, the follow-up treatment cost is higher; when using alkaline system, ammonium salt system, chloride salt system to leaching lead-zinc oxide ore, the amount of leaching slag is large, the alkali content in the slag is high, and a strong alkali leaching slag that is difficult to handle will be formed at the same time. A large amount of strong alkali leaching slag stockpiling will cause secondary pollution, and the environmental risk is relatively large, which greatly limits the promotion of this process

[0004] Micro-grain embedded lead-zinc oxide ore is a kind of lead-zinc oxide ore that is extremely difficult to separate. Even if the fine grinding process is used, the lead-zinc oxide minerals in the ore cannot be effectively dissociated. It is difficult to separate lead and zinc by traditional mineral processing methods. The lead-zinc mutual inclusion rate in the product is high, and it is difficult to meet the needs of the subsequent treatment process

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