Lead-zinc ore is a mineral rich in metal elements lead and zinc. Lead and zinc are extremely close in nature, especially in primary deposits, and often coexist. However, there are 11 kinds of lead minerals and 6 kinds of zinc minerals that can be used in industry, among which galena and sphalerite are more important. There are smithsonite, white lead ore and so on. Lead and zinc are widely used in electrical industry, machinery industry, military industry, metallurgical industry, chemical industry, light industry and pharmaceutical industry. In addition, lead metal also has many uses in nuclear industry, petroleum industry and other sectors.
Lead-zinc ore processing and production technology
The processing and production process of lead-zinc ore mainly includes three processes: crushing, grinding and beneficiation. In the crushing process, the three-stage closed-circuit crushing is more modern and suitable for the crushing of high-hardness lead-zinc ore, which can complete the work of ore crushing and partial dissociation, thereby improving the subsequent grinding efficiency; The efficient grinding process can make the lead-zinc ore grind more fully; in the beneficiation process, the integrated rapid flotation technology can be used to improve the original complex flotation system into two sets of integrated rapid flotation systems, which greatly shortens the time. The technological process is improved, which is conducive to ensuring the quality of concentrate and reducing system investment.
Stage 1: crushing and screening – three-stage closed-circuit crushing
Large pieces of lead-zinc ore are evenly sent to jaw crusher or coarse crushing mobile station by vibrating feeder through the silo for coarse crushing; Go to the single-cylinder hydraulic cone crusher for secondary crushing; the lead-zinc ore material after secondary crushing is sent to the multi-cylinder hydraulic cone crusher for fine crushing;
Stage 2: Grinding
The 0-12mm lead-zinc powder sieved by the vibrating screen is evenly sent to the ball mill for grinding, and sieved by the screw classifier, and those that do not meet the requirements are sent to the ball mill to continue grinding;
Stage 3: Magnetic Separation
The lead-zinc powder that meets the beneficiation requirements is sent to the magnetic separator for strong magnetic separation and magnetic separation to remove sundries;
Stage 4: Drying
The obtained lead-zinc powder is sent to a dryer for drying to obtain lead-zinc fine powder.
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