Since most manganese ores are fine-grained or fine-grained, and there are a considerable amount of high-phosphate ore, high-iron ore and symbiotic (associated) beneficial metals, it brings great difficulty to mineral processing. At present, the commonly used manganese ore beneficiation methods are mechanical beneficiation methods (mineral washing, screening, gravity separation, strong magnetic separation and flotation) and special beneficiation methods (fire enrichment, chemical beneficiation methods, etc.)

The manganese ore beneficiation production line is composed of jaw crusher, hammer crusher, ball mill, classifier, magnetic separator, flotation machine, thickener and dryer and other main equipment, which can be composed of feeding machine, elevator and conveyor. Complete beneficiation production line. Such a manganese ore beneficiation production line has the advantages of high efficiency, low energy, high processing capacity, and reasonable economy. Its beneficiation process is that the raw ore is crushed in the first stage and then screened by a double-layer vibrating screen. The upper product is re-crushed and then crushed in the second stage together with the middle product. The second crushed product is returned to combine the first crushed product and to sieve. The final product after sieving is ground through the first ball mill and forms a closed-circuit grinding with the grading mechanism. The grading overflow is classified by the cyclone and then enters the second-stage ball mill for regrinding, and then forms a closed-circuit grinding with the cyclone . The cyclone overflow is firstly subjected to priority flotation, and its foam product is subjected to secondary selection and third selection to finally become a concentrate product. After priority flotation, the tailings undergo primary roughing, primary selection, secondary selection, The separation process of three-time selection and one-time selection, the tailings of one-time selection and the foam products of one-time selection enter the cyclone for re-classification and re-separation, and the second selection and one-time selection constitute closed-circuit separation The third selection and the second selection constitute a closed-circuit selection.

Manganese ore beneficiation technology progress is manifested in:

(1) Optimization of beneficiation process. By strengthening ore washing and screening, gravity separation and coarse-grained strong magnetic pre-selection, the process structure is optimized, and the technical and economic indicators of ore dressing have been improved. Coarse-grained strong magnetic separation and gravity pre-selection can increase the grade of manganese ore by 3%~5%, especially suitable for manganese carbonate ore.

(2) Various types of strong magnetic separators are used in production. The development and successful application of magnetic separation equipment such as DPMS permanent magnet strong magnetic separator and new wet permanent magnet machine have enabled the effective recovery of manganese ore that could not be recovered or had poor recovery effect before, and significantly improved the technical indicators of the concentrator. Obtained, better economic benefits.

(3) The SHP type strong magnetic separator and SLon type high gradient magnetic separator widely used in iron ore are applied in manganese ore, which significantly improves the separation index of fine-grained manganese ore, and is used in manganese ore slime and tailings. The recovery of manganese minerals provides an effective way.

(4) Progress has been made in the comprehensive recovery of polymetallic manganese ores.