Mineral Processing

lead zinc Processing

According to the different types of ore, lead-zinc ore beneficiation process is also different, common are heavy-floating, magnetic-floating, heavy-magnetic-floating and so on. Flotation is generally indispensable for the separation of lead-zinc ores. As far as the flotation process is concerned, it can be divided into a priority flotation process and a mixed flotation process, that is, whether there is floating lead first and then floating zinc, or if the lead and zinc are mixed and floated out.

lead-zinc ore beneficiation process

Crushing and screening

Most of the lead-zinc deposits are carbonate deposits, and some are skarn-type, spout-sedimentary deposits. The main metal minerals in the deposit are galena, sphalerite, pyrite and chalcopyrite. Generally, a three-stage one-closed circuit crushing process is adopted. The crushing and screening equipment commonly used in the beneficiation process of lead-zinc mine is as follows:

Grinding

According to the different properties, genesis, structure and structure of the lead-zinc ore in different dressing plants, there are large differences in the design of the grinding process. Because of economic considerations, small dressing plants often adopt a simple grinding process to facilitate operation and management. In order to obtain better economic and technical effects, large-scale beneficiation plants usually conduct multiple scheme comparisons to determine the grinding process.

Flotation

1. Mixed flotation-lead zinc separation Process advantages: The flotation process performs two mixed flotation of lead and zinc under weak alkaline conditions, and separates lead and zinc under weak acid conditions. The process of mixing lead and zinc twice can discard the tailings at one time and reduce metal loss. In the lead-zinc ore beneficiation process, the destination of the coarse concentrate and the location of the separation ore return can be flexibly configured to adapt to changes in the grade of the original ore. 2. Floatable for lead and zinc, separation of lead and zinc, mixed floatation of zinc and sulfur, separation of zinc and sulfur Process advantages: Floatable lead and zinc eliminate the forced suppression of easily floatable minerals by priority flotation, and also avoid the forced activation of difficult floated zinc minerals by mixed flotation, thereby reducing the consumption of reagents and the subsequent separation of residual reagents Impact. In the lead-zinc ore beneficiation process, the commonly used equipment is a mechanically agitated flotation machine. This year, with the improvement of flotation machine technology, the modified and upgraded version of mechanical agitated flotation machine has been widely used in the newly-built concentrator.

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