Manganese ore, most of which are low grade ore, beneficiation processing must be carried out. However, the majority of manganese ore is fine-grained or micro-fine disseminated, and a considerable number of high phosphate, high iron ore, and (with) students useful metals, and therefore very difficult to beneficiation processing. Zhengzhou Xinhai Machinery Manufacturing Co., Ltd. technical personnel, At present, China’s manganese ore beneficiation method for the election machinery (including washing, screening, re-election, high intensity magnetic separation and flotation), and the fire enrichment, chemical processing France and so on.
A washing and screening
Washing is the use of hydraulic flushing or additional mechanical scrubbing the separation of ore and shale. Commonly used equipment wash the griddle, cylinder washing machine and trough-type washing machine.
Washing operations often associated with screening, such as the shaker directly flush cleaning or washing machine ore (Net mine) sent shaker screening. Screening can be as an independent operation, the separation of different particle size and grade of product supply for different uses.
(2) re-election
Re-election only used for sorting a simple structure, disseminated coarse-grained ore, especially suitable for high density of oxide ore. Common methods of heavy media beneficiation jig beneficiation and shaker beneficiation.
China deal with the process of manganese oxide minerals are generally broken ore to 6 ~ 0mm or 10 ~ 0mm, then grouping the coarse level of the jig, the fine level to send shaker election. Equipment and more Haz reciprocating type jig and 6-S shaker.
(3) high intensity magnetic separation
Manganese compound belongs to the weakly magnetic minerals [than the susceptibility X = 10 × 10-6 600 × 10-6cm3 / g,], in a strong magnetic field of the magnetic field strength Ho = 800 ~ 1600kA / m (10000 20000oe) separatorare recycled, generally can improve the manganese grade of 4% to 10%.
Magnetic separation is simple, easy to control, adaptable, and can be used for a variety of manganese ore sorting, in recent years has been dominated in the manganese ore. New types of coarse, medium and fine-grained magnetic machine has been developed and successfully. At present, the most common manganese, medium-grained strong magnetic separator, coarse and fine strong magnetic separator has gradually been applied to micro-fine strong magnetic separator is still at an experimental stage.
(4) weight – magnetic separation
At present, new and converted into a weight – magnetic separation plant, Liancheng, Fujian, Guangxi, leading, Jingxi and lower mines manganese. Such as the Citylink manganese weight – magnetic separation plant, processing oxide ore leaching, the use of AM-30 jig handle 30 ~ 3mm of washed ore, manganese available to more than 40% of the quality manganese ore, and then handled impurities selecting battery manganese raw material. Jig tailings and less than 3mm wash mine diameter grinding to less than 1m, with a strong magnetic separator, sorting, manganese ore grade increased by 24% to 25%, 36% to 40%.
5 Magnetic – flotation
Currently used in magnetic – flotation process is only Zunyi manganese. The mine is a manganese carbonate-based, low manganese, low phosphorus, iron ore.
According to industry tests the grinding process using a rod mill – milling stage grinding, and size of equipment are φ2100mm × 3000mm wet mill. The strong magnetic shp-2000-type magnetic machine, flotation machine with CHF type inflatable flotation machine. After years of production tests, good performance, well suited to the Zunyi manganese ore dressing application. Magnetic – flotation process successfully tested and in production are applied, marks China’s manganese deep election a big step forward.
6. Fire enrichment
Fire of manganese ore enrichment deal with high phosphorus, high iron refractory poor manganese ore a sorting method, commonly known as the manganese-rich slag. Its essence is the use of the reduction temperature of manganese, phosphorus, iron in the blast furnace or electric furnace to control its temperature to a high temperature for the selective separation of manganese, phosphorus, iron and sorting.
Pyrometallurgical enrichment process is simple, stable production, effective separation of the ores of iron, phosphorus, and get-rich manganese, low iron, low phosphorus manganese-rich slag, this rich manganese slag containing Mn35% to 45% of the general Mn/Fe12 38, the P / Mn <0.002, a high quality manganese alloy materials, but also the natural rich manganese ore is difficult to achieve the above three indicators of man-made high-grade ore. Therefore, the pyrometallurgical enrichment for our high-phosphorus iron and low manganese difficult beneficiation in terms of promising mineral processing methods.
Chemical selected manganese France
The chemical beneficiation of manganese, China has carried out extensive research, including test more, more promising: even Kraft, black manganese France and bacterial leaching of manganese law. Has not yet put into industrial production.
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