China's manganese oxide ore is mostly secondary manganese cap type, weathered leaching type and stacked type deposit. In the past, this type of ore was only subjected to simple washing treatment. With the development of new technologies and equipment, it is mainly used in the process of washing and re-selecting, washing a strong magnetic process or washing and re-selecting a strong magnetic process.
Jingxi Guangxi manganese oxide, manganese ore and manganese ore was soft manganese-based hard gangue minerals are quartz, kaolinite, mica, water; reselection beneficiation plant using a re-election process a strong magnetic separation (see FIG. The Mn content of the selected manganese ore is 37. 02% ~ 48. 43%. The manganese grade of the selected ore concentrate is 34. 22% ~ 38. 86%.
The Daxin manganese mine in Guangxi is one of the largest manganese carbonate deposits in China, and its upper part is weathered manganese cap-type manganese oxide ore. The Daxin manganese ore beneficiation plant adopts a process of washing and re-selecting a magnetic separation process. After the ore is washed and jigging, 5~0. 8mm is sorted by CS-2 strong magnetic field magnetic separator, -0. 8mm SHP-1000 strong magnetic field magnetic separator is sorted to obtain battery manganese and metallurgical manganese products.
Figure 1 Process flow of manganese oxide ore sorting in Jingxi manganese ore dressing plant
Foreign countries mainly rely on washing or re-election for simple manganese oxide ore. The Goupani manganese mine in South Africa uses a hydrocyclone desliming and spiral washing machine sorting process to produce 40% Mn02 concentrate from fines tailings containing 20% ​​Mn02. Brazil's Serra Donavio manganese ore uses two Dina-type vortex cyclones with a diameter of Φ400mm to treat 6-0.8mm of fine ore. The ferrosilicon is used for weighting, and the density is 2800~3200kg/m3. The sorting and heavy medium cycle process is shown in Figure 2.
Fig. 2 Schematic diagram of sorting process of Dina type heavy medium vortex cyclone
1 a check box; 2 a vortex concentrator; 3 a thick machine; 4 a demagnetization coil; 5 a strip sieve; 6 a main medium chamber; 7 a main medium pump; 8 a net medium pump · 9 a magnetic Machine selection
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