|Manganese beneficiation equipment
Manganese metal is frequently produced by preparing a solution of manganous sulfate from ore that has been reduction roasted, and electrolyzing is a typical production process of manganese metal from ore. Manganese ore is roasted to reduce the higher oxides to manganese oxide. Slag from the production of high carbon ferromanganese may also supply manganese oxide. The reduced ore or slag is leached with sulfuric acid to produce manganese sulfate. Impurities, such as iron and aluminum, are precipitated and filtered. Other metal impurities are removed as sulfides, by introducing hydrogen sulfide gas. Either ferrous or ammonium sulfide and air are added to remove colloidal sulfur, colloidal metallic sulfides, and organic matter. The purified liquid is put into a diaphragm cell, and electrolyzed. The manganese metal deposits on the cathode in a thin layer, which is brittle and extremely pure. Manganese m etal can also be made electrolytically by fused-salt electrolysis. Manganese ore that has been reduced to the manganese level is charged to an electrolytic cell which contains molten calcium fluoride and lime. Fused electrolyte is periodically removed, as the volume of fused electrolyte increases.
Most of the manganese ore is a fine or micro-fine disseminated, and a considerable number of high phosphate, high iron and total (with) a useful metal, mineral processing to the great difficulty. At present, the commonly used method for manganese ore processing machinery selection (including washing, screening, re-election, high intensity magnetic separation and flotation), and the fire enrichment, chemical processing methods, etc.
1. Washing and screening
Washing is to use water to wash or scrub additional mechanical separation of ore and clay. Commonly used devices are washing sieve, cylinder washing machine washing machine and trough. Washing operations often associated with screening, such as the shaker directly flush cleaning or washing machine available ore (net mine) sent shaker screening. Screening as an independent operation, separation of different size and grade of product supply to use for different purposes.
Re-elect the current structure, used only for sorting simple, containing coarser cloth of manganese ore, especially for the oxidation of high density manganese ore. Common methods of heavy media beneficiation, ore dressing and shaking jig beneficiation. At present, China dealing with oxidation of manganese in the process, the general is broken ore to 6 ~ 0 mm or 10 ~ 0 mm, and then grouped for jigging coarse level and fine level of delivery shaking election. Equipment mostly Haz reciprocating jig and 6 - S-type shaker.
3. High Intensity Magnetic Separation
Manganese mineral is weakly magnetic minerals than the susceptibility X = 10 * 10 -6 ~ 600 * 10 - 6 cm 3 / g in the magnetic field intensity Ho = 800 ~ 1600 kA / m (10000 ~ 20000 oe) of the strong magnetic field sorting machine can be recovered, the general can improve the grade of 4% Manganese 10%. As the magnetic separation of simple and easy to control, adaptability, can be used for sorting a variety of manganese ore, manganese ore dressing in recent years has been dominated. New types of coarse, medium and fine magnetic machine has been developed and successfully. Currently, the domestic application of manganese is the most common particle strong magnetic separator, coarse and fine intensity magnetic separator is gradually applied, micro-fine intensity magnetic separator is still in the testing stage.
4. Re - Magnetic
Currently has been converted into a new and important - magnetic separation plant has Fujian Lin Shing, Guangxi lead, manganese mines Jingxi and lower. If Liancheng weight - magnetic separation plant, dealing mainly with leaching oxide ore, with AM-30 jig handle 30 ~ 3mm of washed ore, manganese available to over 40% of high-quality manganese ore, and then After handling impurities selecting, manganese powder can be used as battery materials. Jig tailings and less than 3 mm diameter grinding to clean mine after less than 1 m, with a strong magnetic separator selection, manganese ore grade increased 24% to 25% to 36% ~ 40%.
5. Magnetic - flotation
Currently used magnetic - just Zunyi manganese flotation process. Mine is mainly low manganese carbonate manganese, phosphorus, iron ore. According to industry tests, using rod mill grinding process - milling stage grinding, equipment size are 2100 mm * 3000 mm wet-grinding machine. Intensity magnetic separation with shp-2000-type magnetic machine, flotation machine is mainly used CHF-type inflatable flotation machine. After years of production tests, good performance, very suitable for application in Zunyi manganese ore dressing. Magnetic - flotation successfully tested and applied in production.