Lead-zinc ore is one of the most abundant metallic ore resources in the world. It has a wide range of distribution and rich reserves. It has important significance for the economic development and promotion of human society.
Lead-zinc ore is mainly composed of galena and sphalerite minerals. It is mainly formed by the hydrothermal precipitation. And it can also be formed in other geological structure such as skarn, sedimentary metamorphism, etc. The metal elements of lead-zinc ore mainly include Pb, Zn, Fe, Cu, Mn, Ca, Mg, etc.
Lead-zinc ore plays an important role in the production of non-ferrous metals such as lead, zinc and copper. Its ore dressing process is quite complicated, which involves the physical or chemical separation of valuable mineral components from associated gangue.
Crushing and grinding are the most important steps in extracting useful minerals from lead-zinc ore. After the ore is crushed and ground, it is screened and classified by size. In ore beneficiation process, the screened ore is usually slurried with water and further ground before entering the beneficiation process.
The usual methods for ore beneficiation for lead-zinc ore are gravity separation, magnetic separation, and flotation. Gravity methods such as jigging and tabling can be used to concentrate the galena. For the ore that contains more fine particles, it is usually necessary to carry out magnetic separation, so as to eliminate iron bearing minerals. Flotation is used to enrich economic minerals from gangue minerals.
Allocation of lead-zinc ore dressing process is based on the difference in mineral properties. Generally speaking, lead-zinc ore is mainly sulfide, so the main lead-zinc ore dressing process is to separate sulfide mineral and gangue minerals by selective flotation method. The obtained lead-zinc concentrate can meet the requirements of industrial production.
In addition, in order to improve the efficiency of lead-zinc ore dressing and ensure the quality of the end products, it is usually necessary to carry out multi-stage crushing and grinding, ore separation and other processing tasks. For example, flotation process usually consists of many stages of grinding and classification, flotation separation and sequential flotation, regrinding, thickening and filtration, etc.
The lead-zinc ore dressing process is a complex process with many links. In order to obtain high-quality concentrate and high returns, people should have professional skills and experience in mineral processing process. Therefore, in ore dressing process, it is necessary to master the ore dressing technology and a reasonable selection of equipment.
