Lead is a slightly bluish silver-white metal with good ductility, softness and corrosion resistance.In the market, lead is mainly used in the manufacture of batteries, cable sheaths, lead pipes, lead plates and other products, and it also plays an important role in chemical industry, metallurgy, construction and other fields.Understanding the mineral processing process of lead is of great significance to improve the recovery rate and quality of lead, meet market demand, and realize the sustainable use of resources.At present, there are several common types of flotation, reselection, and magnetic separation. Let's take a look at the principles and characteristics of these lead mineral processing.

1. Lead flotation process

The flotation method is based on the differences in the physical and chemical properties of the mineral surface, and by adding flotation agents, the surface of the target mineral is hydrophobic and adheres to the air bubbles, so as to achieve mineral separation. A mineral processing method.For lead ore, the commonly used flotation agents are trapping agents, foaming agents and adjusting agents.The specific process is to first crush and grind the ore to a suitable particle size, so that the lead ore and gangue minerals are fully dissociated.Then a collector is added, and the collector is selectively adsorbed on the surface of the lead ore to make it hydrophobic; then a foaming agent is added to produce stable air bubbles.In the flotation machine, inflation causes a large number of air bubbles to form in the slurry. The hydrophobic lead ore adheres to the air bubbles and forms a foam layer as the air bubbles rise to the surface of the slurry, while gangue minerals remain in the slurry to achieve separation.Finally, the foam product is dehydrated and dried to obtain lead concentrate.

This method has strong adaptability to different types of lead ore, whether it is lead sulfide ore or lead oxide ore, it can achieve good sorting results.However, a large number of flotation agents need to be used, the cost is higher, and the flotation agents may cause certain pollution to the environment.

2. Lead reselection process

The resection method is a mineral processing method that mainly separates minerals based on the density difference.There is usually a certain difference in density between lead minerals and gangue minerals. Gravity, centrifugal force, etc. are used to move minerals of different densities in the medium to achieve separation.This method has low cost, simple structure, low operation and maintenance costs, and does not require the use of expensive flotation agents.

Separation is carried out according to the difference in mineral density.After crushing and grinding the ore, it enters the reselection equipment, such as jig, shaker, spiral chute, etc.Under the action of gravity or centrifugal force, the denser lead minerals settle quickly, while the denser gangue minerals settle slowly, so as to achieve separation.It can handle coarse-grained ores. For some coarse-grained lead ores that are difficult to process by flotation method, the reselection method has certain advantages.

3. Magnetic separation process of lead

Magnetic separation method is a mineral processing method that uses the magnetic differences of minerals to separate.Lead minerals are generally non-magnetic minerals, while gangue minerals may contain magnetic minerals.Through the use of magnetic separation equipment, under the action of a magnetic field, the magnetic minerals are adsorbed, and the non-magnetic lead minerals flow out with the slurry, so as to achieve the separation of minerals.

The lead selection process of this method is simple, the equipment investment is small, and the operation is convenient. For specific types of lead ore, it can effectively remove magnetic gangue minerals and improve the grade of lead concentrate.However, the sorting effect of lead minerals is limited. Most lead minerals are non-magnetic minerals. Only in the case of magnetic gangue minerals can the magnetic separation method play a certain role.