China is rich in lead and zinc resources, lead and zinc reserves are living in the fourth world. Which reserves 3,500 tons of lead and zinc reserves of about 94 million tons. Chinese lead and zinc origin of more than 700, more than 8 million tons of lead and zinc total reserves are mainly concentrated in the provinces of Yunnan, Inner Mongolia, Hunan, Guangdong, Gansu, Guangxi, Yunnan, where lead and zinc reserves of about 26 million tons, ranking China the most.

Depending on the type of ore, lead and zinc beneficiation process also vary. With the improvement of lead-zinc mineral processing technology, lead-zinc beneficiation process is generally used to heavy - floating, magnetic - floating, heavy - Magnetic - floating and the like. Lead-zinc flotation sorting is generally inseparable from, the flotation process, the flotation process and can be divided into mixed flotation process, namely the existence of the lead after the first float will float zinc or lead, zinc mixed surfaced again separation distinction.

Common mineral concentration Process description:

First, the crushing and screening stage

Most carbonate rocks of lead-zinc deposits, as well as part of the skarn, ejection - sedimentary deposits. The main metallic minerals deposits galena, sphalerite, pyrite and chalcopyrite. Generally using a closed-circuit crushing three-stage process.

Second, the grinding stage

Depending on the different nature of the election lead-zinc plant, origin, structure and configuration of the grinding process design are quite different. Small processing plant in economic considerations, often with a simple stage grinding process, thus facilitating operation and management. Large-scale processing plant in order to obtain better economic technical effect is usually carried out to determine the best multi-program comparison grinding process. Grinding machine is selected from the plant, "energy-hungry", in order to achieve the purpose of energy saving, grinding stage lead-zinc mineral processing equipment can produce energy-saving ball mill Baoshan, saving about 20% -30%.

Third, the beneficiation stage

Common mineral concentration process: lead-zinc mixed floating - lead and zinc, lead, zinc, etc. can float - lead and zinc - Zinc sulfur mixed floating - zinc sulfur separation.

Lead and zinc mixed floating - lead and zinc

Process advantages: flotation processes lead twice in alkaline conditions, the zinc flotation, under weakly acidic conditions lead and zinc separation.

The two processes lead and zinc tailings mixed election can be discarded disposable and reduce metal loss. The mineral concentration process, the rougher concentrate whereabouts and return locations ore separation enables flexible configuration, able to adapt to changes in ore grade.

Lead and zinc can float - lead and zinc - Zinc sulfur mixed floating - zinc sulfur separation

Process advantages: eliminating lead and zinc flotation can float on the buoyant mineral forcibly suppressed while avoiding the flotation of zinc mineral difficult floated forced activation, thereby reducing drug consumption, lower residual pesticides on the subsequent separation the impact of improved production targets.

The mineral concentration process, usually used equipment for mechanical flotation machine. This year, with the improved flotation machine technology, upgrading version mechanical flotation machine has been widely used in the new concentrator. Baoshan production XJ-type, SF type mechanical flotation machine after the transformation, performance has improved significantly. Mainly in the prolonged life of wearing parts, increasing the amount of intake, decreased energy consumption and so on.