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How to choose manganese ore?
published date: 2019/10/17

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Manganese ore beneficiation flotation process and processing technology, manganese ore beneficiation method, manganese ore beneficiation technology Most of China's manganese ore is a poor ore and must be processed. However, since most manganese ore is a fine-grained or fine-grained inlay, and there are a considerable number of high-phosphorus ore, high-iron ore and common (concomitant) beneficial metals, it is very difficult to be processed. At present, the commonly used manganese ore beneficiation methods are mechanical selection (including washing, sieving, re-election, strong magnetic separation and flotation), as well as fire enrichment and chemical beneficiation.

1. Washing and sieving Washing is the separation of ore from mud by hydraulic rinsing or mechanical scrubbing. Commonly used equipment includes washing sieves, cylinder washing machines and tank washing machines. The washing operation is often accompanied by screening, such as direct flushing on the vibrating screen or the ore (net ore) obtained by the washing machine is sent to the vibrating sieve. Screening can be used as an independent operation to separate products of different sizes and grades for different purposes.

2. Re-election The current re-election is only used to select manganese ore with simple structure and coarse grain size, especially suitable for manganese oxide ore with higher density. Common methods include heavy medium dressing, jigging and shaker dressing. At present, the process of processing manganese oxide ore in China is generally to crush the ore to 6~0mm or 10~0mm, and then group, coarse-grade jigging, and fine-level shaker selection. Most of the equipment are Haz-type reciprocating jigs and 6-S shakers.

3. Strong magnetically selected manganese minerals are weak magnetic minerals (specifical magnetic susceptibility X=10×10-6600×10-6cm3/g), strong magnetic field in magnetic field strength Ho=8001600kA/m (1000020000oe) The magnetic separator can be recycled, generally increasing the manganese grade by 4% to 10%. Because of the simple operation, easy control and strong adaptability of magnetic separation, it can be used for the selection of various manganese ore. In recent years, it has dominated the 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.

4. Heavy magnetic separation At present, the heavy-magnetic separation plants that have been newly built and reconstructed in China include Fujian Liancheng, Guangxi Longtou, Jingxi and Xialei. For example, Liancheng Manganese Mine Heavy-Magnetic Separation Plant mainly treats leaching manganese oxide ore, and uses AM-30 type jig to treat 30~3mm of cleaned ore, which can obtain high-quality manganese concentrate containing more than 40% of manganese. After the removal of impurities, it can be used as a raw material for battery manganese powder. After jigging tailings and less than 3mm washed ore to less than 1m, the strength of manganese concentrate should be increased by 24% to 25%, reaching 36% to 40%.

5. Strong magnetic-flotation Currently, only the Zunyi manganese ore is used in the strong magnetic-flotation process. The mine is a low-manganese, low-phosphorus, high-iron manganese ore mainly composed of manganese carbonate ore. According to industrial tests, the grinding process uses a rod mill-ball mill 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, which indicates that the deep selection of manganese ore in China has taken a big step forward.

6. Fire method enrichment of manganese ore by fire method is a sorting method for treating high-phosphorus and high-iron difficult-to-select manganese-poor ore. It is generally called manganese-rich slag method. The essence is a high-temperature sorting method for selectively separating manganese, phosphorus and iron by controlling the temperature of manganese, phosphorus and iron in a blast furnace or an electric furnace.

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