As an important nonferrous metal resource, the crushing and processing technology of lead-zinc ore directly affects the efficiency and economic value of mineral processing. In view of the large hardness difference of lead-zinc ore (Praeter hardness 5-7) and the complex associated minerals, the modular crushing system innovatively developed by Liming Heavy Industry can accurately match the needs of multiple mineral species such as sulfide ore, oxide ore and carbon-containing ore.
Analysis of three-stage one closed-circuit crushing process
1. Coarse crushing stage
The PEW European version jaw crusher is used to process ≤1200mm raw ore. The unique V-shaped crushing chamber design increases the production capacity by 30%. With the hydraulic overload protection system, it can effectively deal with the impact of composite ores containing precious metals such as gold and silver by 25.
2. Medium and fine crushing optimization
HPT multi-cylinder hydraulic cone crusher realizes secondary crushing of lead-zinc ore, and controls the material particle size to ≤50mm through the principle of laminated crushing. The intelligent spindle speed adjustment function (0-220rpm) can adapt to the hardness fluctuation of lead-zinc sulfide ore and oxide ore by 35.
3. Closed-circuit screening system
YKN series heavy-duty vibrating screens are equipped with dual motor excitation technology, with a screening efficiency of 92%. The anti-blocking screen developed specifically for muddy lead-zinc mines reduces the return rate by 20%.
Technical advantages of Liming Heavy Industry Equipment
CS550 cone crusher: equipped with an automatic cavity cleaning system, it can still maintain a stable production capacity of 570-750t/h when processing arsenic-containing copper-iron ores
MTW215 European version grinding mill: for the needs of lead-zinc tailings re-grinding, it saves 40% energy compared to traditional equipment
Intelligent control system: realizes online monitoring of lead-zinc ore crushing particle size, and the DCS central control platform can increase the product qualification rate to 98%
Successful application cases
A carbon-containing lead-zinc mine project in Mali adopts Liming's "jaw crusher + cone crusher + vertical shaft impact crusher" combination solution, which reduces the energy consumption of the crushing system by 25%, extends the equipment maintenance cycle to 3,000 hours, and exceeds 1 million tons of annual processing capacity
(Liming Heavy Industry Group provides customized crushing solutions. Click online customer service to obtain exclusive quotation solutions for lead-zinc ore processing equipment)
