A magnetic separator (magneticseparator) is a common manganese selection device.
Manganese mineral is a weak magnetic mineral [specifical magnetization coefficient X=10×10-6～600×10-6cm3/g], and it can be used in a strong magnetic field magnetic separator with magnetic field strength Ho=800～1600kA/m (10000～20000oe). When recovered, it can generally increase the manganese grade by 4% to 10%. Due to the simple operation, easy control and strong adaptability of magnetic separation, it can be used for various manganese ore sorting. In recent years, it has dominated manganese ore dressing .
Various new types of coarse, medium and fine grain magnetic machines have been successfully developed. At present, the most common application of manganese ore in China is the medium-grain strong magnetic separator. The coarse-grained and fine-grained magnetic separators are gradually being applied. The micro-grain-strong magnetic separator is still in the experimental stage.
Currently used magnetic - flotation process only Zunyi manganese, the mine is a manganese carbonate-based low Mn, low phosphorus, high iron ore. According to industrial tests, the grinding process uses rod mill-ball milling stage grinding, and the equipment scale is φ2100mm×3000mm wet grinding machine. The strong magnetic selection adopts the shp-2000 type strong magnetic machine, and the flotation machine mainly uses the CHF type inflatable flotation machine. After years of production test, the performance is good, it is very suitable for Zunyi manganese ore dressing application. The strong magnetic-flotation process has been successfully tested and applied in production.
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