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How to beneficiate lead-zinc oxide ore?

315 19.Sep.2022 KZ Editor

Lead and zinc metals are widely used in various industrial fields. With the continuous research on lead-zinc technology, the demand for lead-zinc ore resources is also increasing.

In the actual mining process, the beneficiation of lead-zinc oxide ore is relatively complicated, and it also puts forward higher requirements on the beneficiation and smelting technology of ore. Below we will systematically introduce the beneficiation technology of low-grade lead-zinc oxide ore.

Reasons for the refractory selection of low-grade lead-zinc ore

01.The composition of matter is complex

Lead and zinc are extremely close in primary deposits, often symbiotically. Lead and zinc have the same source of metal-forming materials, similar electronic structures in the outer layer, and easily form the same soluble complexes.


There are many types of lead oxide and zinc oxide in lead-zinc ores, among which zinc oxide minerals are more complex, water-soluble zinc and willemite account for a large proportion of zinc oxide minerals, and this part of zinc is difficult to float in the flotation process. Zinc mineral.

02.Mineral structure is complex

The formation conditions of lead-zinc ores are relatively complex, and are greatly affected by precipitation, climate, geology, etc., resulting in different specific structures of lead-zinc ores, different content and distribution of lead-zinc elements, which directly lead to lead-zinc ores. The appearance of the surface varies.

Lead-zinc ore beneficiation process

The complexity of the composition of low-grade lead-zinc ore leads to a corresponding increase in the difficulty of its beneficiation process. At present, the methods for treating lead-zinc oxide ore include sulfide flotation, direct flotation with anionic collectors, chelating agent neutral oil flotation and leaching flotation. Among them, the most important and commonly used method is the sulfidation flotation method.

According to the different floatability of useful minerals in lead-zinc ore, different sulfidation flotation methods need to be adopted. There are mainly priority flotation method, mixed flotation method, etc.


According to the different degree of floatability of lead and zinc, the method of first suppressing the floating of lead, then activating zinc, and then recovering lead and zinc concentrate in turn is the priority flotation method. After the lead and zinc concentrates are mixed and flotated, the method of separating lead and zinc concentrates is the mixed flotation method.

Lead and zinc metals are used more and more widely, but the reserves of lead and zinc are relatively small, and lead and zinc resources are increasingly in short supply. Faced with this situation, lead and zinc resources should be exploited and utilized more rationally. On the one hand, continuously improve the mining technology of lead-zinc ore and master better mining process and ore dressing agents; on the other hand, do a good job in the research and development of recycling technology to improve the secondary utilization level of lead-zinc ore. Therefore, it is recommended that mine owners do a good job of beneficiation test before building a lead-zinc concentrator, so as to avoid blindly copying the process and affecting the recovery efficiency of lead-zinc ore.

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