Introduction of Lead-Zinc Ore Dressing Equipment

01Lead-zinc ore crushing equipment

Most lead-zinc mines adopt the conventional process of closed-circuit crushing (ore washing) and screening to improve the crushing efficiency of ore and the quality of concentrate. In this process, crushing equipment is the key link, usually including the following common equipment:

1. Jaw crusher: used for primary crushing, with a sturdy structure and efficient crushing capacity, it can crush large pieces of ore into smaller particles, laying the foundation for subsequent crushing operations.

2. Cone crusher: used in the intermediate and fine crushing stages, with good crushing ratio and particle size adjustment ability, suitable for processing medium and high hardness ores.

3. Impact crusher: mainly used for fine crushing and shaping operations, suitable for processing soft and medium hardness ores, and can effectively improve the particle grading of ore.

Through the coordinated use of these crushing equipment, lead-zinc mines can achieve efficient ore crushing, improve the overall efficiency of mineral processing, and provide suitable ore particle size for subsequent screening and separation processes.

02Lead-zinc ore grinding equipment

Most large and medium-sized lead-zinc mines adopt conventional grinding processes. The equipment used in lead-zinc ore grinding operations mainly includes the following types:

1. Ball mill: It is widely used in the grinding process of lead-zinc ore. It grinds the ore into fine particles through the friction and impact of the steel ball and the ore. It has strong adaptability and large processing capacity.

2. Rod mill: Mainly used in the coarse grinding stage. It uses steel rods as the grinding medium. It is suitable for processing coarser ores and can reduce excessive grinding of ore particles.

3. Autogenous grinding machine: The ore itself is used as the grinding medium, which reduces the usage of grinding medium. It is suitable for processing higher hardness ore, which can improve grinding efficiency and reduce operating costs.

4. Semi-autogenous grinding machine: It combines the advantages of ball mill and autogenous grinding machine, and adds steel balls to assist grinding. It is suitable for processing various types of ores and has high processing capacity and flexibility.

In addition, the grinding medium has a significant impact on lead and zinc flotation indicators. During the grinding process, the new surface of the ore may be contaminated or adsorbed, which will affect the flotation potential of the ore and its combination with the flotation agent, thereby affecting the flotation index. Therefore, selecting appropriate grinding media and optimizing grinding conditions are key factors to improve the efficiency of lead-zinc ore beneficiation.

03Lead-zinc ore flotation equipment

In the process of beneficiation of lead-zinc ores, flotation equipment is a key link, mainly including mechanical agitation self-priming flotation machines and inflatable flotation machines.

1. Mechanical stirring self-priming flotation machine: Through the rotation of the agitator and the self-priming air flow of the slurry, bubbles are introduced into the flotation tank. It is suitable for processing various types of ores and has strong equipment stability and easy operation. , the advantage of high slurry processing capacity.

2. Inflatable flotation machine: Provide bubbles directly into the slurry through an external air source to enhance the flotation effect of the ore. It is especially suitable for processing high-concentration slurries. The bubbles are generated evenly, which helps to improve the recovery rate of minerals.

These flotation equipment play a vital role in the flotation process of lead-zinc ores. Choosing suitable flotation equipment can significantly improve the processing efficiency and economic benefits of ore.

04Lead-zinc concentrate dehydration process and equipment

In the process of lead-zinc concentrate dehydration, choosing the right equipment is crucial to improving dehydration efficiency and treatment effect. At present, the dehydration of domestic lead-zinc concentrate generally adopts two-stage processes of concentration and dehydration. The commonly used equipment includes:

Ceramic filter: a conventional equipment for treating lead-zinc sulfide concentrate, with high-efficiency filtering capacity and stable operating performance, which can effectively separate the water in the concentrate slurry and is suitable for continuous processing of large quantities of concentrate.

Filter press: For lead-zinc sulfide (oxidation) concentrate with high mud content, the filter press fully squeezes out the water in the slurry by applying compression force. It is suitable for treating slurry with high mud content and can obtain a drier filter cake.

In short, lead-zinc ore dressing depends on the cooperation of a variety of advanced equipment, which is crucial in improving ore dressing efficiency and ore recovery rate. With technological progress, ore dressing equipment will become more intelligent and efficient, helping the sustainable utilization of lead-zinc ore resources. The rational selection and application of these equipment are of great significance to the improvement of the benefits of lead-zinc mining enterprises.