As an important source of metal resources, lead-zinc ore has economic value and industrial value. With the continuous expansion of the use of lead-zinc ore, the development and utilization of lead-zinc ore resources have received more and more attention.
The mineral processing of lead-zinc ore can be divided into four stages: crushing stage, separation stage, product dehydration stage, and tailings treatment stage. In this article, we will start from the perspective of the lead-zinc ore mineral processing, and take stock of all kinds of mineral processing equipment used in the lead-zinc ore mineral processing.
What equipment is needed for the mineral processing of lead-zinc ore
Lead-zinc ore crushing and grinding equipment
The lead-zinc ore crushing and grinding stage can be divided into two parts: crushing and screening and grinding and grading. This stage determines the particle size of the lead-zinc ore to be selected, which is related to whether the subsequent lead-zinc ore mineral processing can proceed smoothly.
In the lead-zinc ore crushing process, according to different technological processes, the crushing process used includes one-stage crushing and screening, two-stage one-closed circuit crushing and screening, etc. In the crushing stage, jaw crushers can be used for coarse crushing, and cone crushers can be used for medium crushing. Crushers and screening equipment can use circular vibrating screens.
Some lead-zinc ores are prone to produce slime, which may affect the mineral processing stage. According to the different properties of the raw ore of lead-zinc ore, ore washing and desliming can be added to the crushing and screening. The washing equipment can use the washing screen, and the desliming equipment can Use a spiral classifier.
In the grinding and grading process of lead-zinc ore, a closed-circuit grinding and grading system can be adopted, and a two-stage closed-circuit grinding and grading system can be used. According to the composition of different lead-zinc ore particle sizes, stage grinding and separation processes can also be adopted, with ball mills as the main Grinding equipment and hydrocyclones are grading equipment.
Lead-zinc ore mineral processing equipment
The mineral processing of lead-zinc ore is generally based on the flotation process, and its sorting process includes the priority flotation process of first flotation of lead and then flotation of zinc, the mixed flotation process of lead-zinc mixed flotation and separation, and the first flotation and easy flotation process. Flotation flotation process, heavy-float combined process, flotation-magnetic combined process, etc.
For the selection of flotation equipment, various types of suction mechanical agitation flotation machines (SF type flotation machine, BF type flotation machine, JJF type flotation machine) and inflatable mechanical agitation flotation machines (KYF type flotation machine) can be used. machine, XCF type flotation machine), you can consider choosing the combined unit composed of KYF flotation machine and XCF flotation machine.
Among them, XCF is used as a suction tank, and KYF is used as a direct current tank to achieve horizontal configuration without the need for a foam pump.
Gravity separation and magnetic separation, as supplementary processes to improve the mineral processing index, can be added to the mineral processing according to the mineral processing index of the specific ore. Among them, gravity separation generally uses a shaking table, and magnetic separation generally uses a permanent magnetic drum magnetic separator.
Lead-zinc ore dehydration and filtration equipment
The filtration and dehydration stage of lead-zinc ore includes two parts: dehydration and filtration, which determine whether the lead-zinc concentrate can meet the use requirements. In the dehydration stage, high-efficiency thickeners are generally used to dehydrate different types of concentrates.
In the filtration stage, program-controlled hydraulic chamber filter presses, ceramic vacuum filters, disc vacuum filters and other equipment can be used to further process the dehydrated concentrate to make it more in line with the water content requirements of the product.
Lead-zinc ore tailings treatment equipment
For the tailings produced during the mineral processing of lead-zinc ore, the method of dry tailings is generally used for temporary stockpiling, which not only relieves the pressure on the storage capacity of the tailings pond, but also reduces the potential safety hazards of the tailings pond, and the use of backwater reduces the waste water.
Dealing with pressure saves the cost of mine production and operation, which is also a requirement for the construction of national green and environmentally friendly mines.
Taking the common tailings dry discharge process scheme of lead-zinc ore—the dehydration process of hydrocyclone + dewatering screen + filter press as an example, the process uses hydrocyclone, dewatering screen and filter press as the main equipment, and the tailings The ore is transported to the rubber pump pump box by gravity flow or pump, and pumped into the concentrated hydrocyclone group, and the bottom flow of the cyclone flows to the dehydration screen by itself, and the dehydration screen is transported out of the workshop by a belt for storage, and the bottom of the sieve is transported by a pump to the thickener.
The cyclone overflows to the thickener by itself. After concentration, the filter press feed pump is used to pump the filter press into the filter press to form a filter cake, which is transported out of the workshop by a belt for storage.
The filter press filtrate and dehydration screen filtrate flow to the filtrate by itself The buffer pool is then pumped to the thickener, and the thickener overflows to the return pool, and is pumped back to the dressing plant for use after clarification.
The above are common lead-zinc ore mineral processing equipment. In the actual dressing plant, the properties of lead-zinc ore are complex and diverse. The selection of mineral processing equipment and process flow of lead-zinc ore should be based on scientific and reasonable basis. Suitable lead-zinc ore mineral processing equipment and mineral processing to achieve ideal return on investment.