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Manganese ore beneficiation is a key link in the manganese industry, which determines the effective utilization of manganese ore resources and product quality. With the growing global demand for manganese, especially in the fields of steel manufacturing and battery production, efficient manganese ore beneficiation technology is particularly important. Through advanced beneficiation technology, the grade of manganese ore can be improved, the impurity content can be reduced, and the market competitiveness of the final product can be improved. The following will introduce the main steps and technologies of manganese ore beneficiation process.
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The commonly used crushing equipment for manganese ore beneficiation is jaw crusher. Due to the increasing demand for deep-processing products in the manganese industry in recent years, fine-particle manganese ore powder has gradually been in short supply. Raymond mill is a commonly used equipment for fine-particle powder making and has been widely used in ore dressing plants. Although Raymond mill has the advantages of reliable performance, it produces large dust, high noise and high energy consumption during operation. With the continuous development and progress of equipment production technology, grinding equipment has made great improvements in energy consumption, noise and environmental protection, and has been promoted and applied in the manganese industry.
Under the action of hydraulic, mechanical, frictional forces, etc., the ore of the original ore will be separated from the muddy material, thereby improving the ore grade. This process is called ore washing. Usually, the simple production of rich ores or the pretreatment before ore dressing can adopt the ore washing process. Common ore washing equipment of manganese ore beneficiation includes: vibrating screen, ore washing screen, ore washing scrubber, etc. Most manganese carbonate ores need to be washed. First, a vibrating screen is used for water screening. The under-screen product enters the spiral classifier for processing. The classified product will be combined with the over-screen product. Manganese oxide ore needs to be processed by a double spiral trough ore washing equipment with strong scrubbing ability. With the gradual attention of ore dressing plants to manganese ore washing operations, the ore washing production process has developed from the original one-time ore washing operation to two or more ore washing operations.
The process of separation based on the density and particle size difference of useful minerals and gangue minerals is called gravity separation process. Gravity separation can be used as a concentrating operation for individual coarse-grained ore resources, but in most cases, gravity separation operations are mainly used as coarse-grained tailing and pre-selection operations. The density of manganese oxide ore is generally 3.7-4.9t/m³, which is significantly different from the gangue mineral silicate, so it can be processed by jigs, shaking tables, cyclones, spiral chutes and other equipment. The density of manganese carbonate ore is generally 3.3-3.6t/m³, which is less different from the density of gangue minerals. It is difficult to obtain good separation indicators using jigs and shaking tables, so concentrators often use heavy medium concentrators to process manganese carbonate ore.
Magnetic separation is a method of separation based on the magnetic differences between various minerals. It has the advantages of simple operation, no secondary pollution and low production cost. Since manganese-containing ores are weakly magnetic minerals, strong magnetic separation is generally used for separation to obtain good mineral processing indicators.
Manganese ore flotation separation technology is an efficient separation method based on the differences in physical and chemical properties of mineral surfaces in the mineral processing process. By adding specific reagents, the floatability of minerals can be changed, making the flotation process more selective. Flotation technology is particularly suitable for separating minerals with similar density and magnetic properties, such as manganese minerals, iron minerals and other gangue minerals. In the processing of manganese ore, commonly used flotation methods include positive flotation and reverse flotation. Among them, anion positive flotation has become the mainstream choice in manganese ore flotation technology at home and abroad because of its good separation effect and wide adaptability. By optimizing the reagent formula and process parameters, flotation technology can achieve fine separation of complex ores, improve the utilization efficiency of manganese ore resources, and further improve the quality and economic benefits of mineral processing products.
The above is a brief introduction to manganese ore beneficiation technology. With the continuous advancement of manganese ore dressing technology, the dressing process has become more efficient, environmentally friendly and economical. By comprehensively utilizing a variety of technical means such as crushing, grinding, ore washing, gravity, magnetic separation and flotation, the utilization rate of manganese ore can be maximized, production costs can be reduced, and the market demand for high-quality manganese products can be met. At the same time, the development direction of future beneficiation technology will pay more attention to intelligence and greening, and realize the sustainable use of resources by optimizing process flow and introducing advanced equipment.
