The characteristics and development trend of manganese ore beneficiation
The vast majority of manganese ore is lean ore and must be processed. However, because most manganese ores are fine-grained or fine-grained, and there are a considerable amount of high phosphate ore, high iron ore and co- (associated) beneficial metals, it brings great difficulty to the processing of ore. At present, the commonly used manganese ore beneficiation methods are mechanical separation (including ore washing, screening, gravity separation, strong magnetic separation and flotation), as well as pyroconcentration, chemical beneficiation, etc.
Manganese ore beneficiation has similarities with other metal ore beneficiation, but also has its particularity. Due to the characteristics of low-grade manganese ore, high impurity, complex ore structure, and fine-spreading particle size, low-grade ore washing to achieve “richness from poverty” through washing is a technical policy that my country’s manganese industry needs to adhere to for a long time. Although it is technically feasible to directly use low-grade manganese ore for deep processing, if the raw ore grade of manganese ore can be improved, production costs will be significantly reduced and huge economic benefits will be produced.
The development of manganese ore beneficiation in my country is mainly manifested in the following three aspects:
Manganese ore technological mineralogy and beneficiation technology research. Through process mineralogy research and improvement of beneficiation technology, to solve the problem of separation and dephosphorization of fine-grained manganese ore. Research on the process and equipment of ore washing, screening and gravity separation. Washing, sieving, and gravity separation are older ore dressing methods, which not only have low investment costs and low operating costs, but are also effective separation methods suitable for the characteristics of manganese ore resources in my country. Separation is provided through the research of process optimization and new high-efficiency equipment Efficiency and recovery rate.
Development and application of a new type of magnetic separator. Although the investment of magnetic separation is relatively high, the operating cost is relatively low and the operation is simple. In recent years, magnetic separation has made considerable progress in the beneficiation of manganese ore, and will continue to be the main development direction of manganese ore beneficiation in the future, especially the magnetic separation process and equipment for fine and fine particles. Combined process of beneficiation and metallurgy.
For manganese ore with low iron, high phosphorus, poor manganese, polymetallic symbiosis, etc., it is difficult to achieve satisfactory separation results using a single beneficiation or metallurgy. The connection between beneficiation and metallurgy is getting closer and closer. The combined process of beneficiation and metallurgy is the separation of refractory manganese ore. More effective and economical methods are also the main direction for the development of mineral processing.
The “three wastes” in the process of manganese ore beneficiation and smelting are the comprehensive utilization and clean production of tailings, waste residues and waste gas. Large-scale, high-efficiency and automatic processing equipment. Research on the separation mechanism of manganese ore beneficiation and smelting.
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