The most comprehensive manganese ore beneficiation method

Manganese ore in China mostly belonging to lean, must be dressing treatment. But because the majority of manganese ore belongs to fine grain or fine grain distributed, and there are a number of high phosphorus and high iron and CO (with) useful metal, so to bring a lot of difficulty dressing processing. Manganese ore dressing method commonly used in China for machinery (including washing, screening, gravity separation, high intensity magnetic separation and flotation separation), and the enrichment, chemical processing method. 1, washing and screening. Washing is the use of hydraulic flushing or additional mechanical scrubbing the ore and mud separation. Commonly used equipment washing screen, cylinder washer and launder washer. Deslime often and with screening, such as in the vibrating screen direct flushing and cleaning or washing machine for ore (ore feeding vibration sieve net). Screening can be used as an independent operation, the separation of different size and grade of the product supply different purposes. 2, gravity concentration. Only for re-election don't choose has the advantages of simple structure, block ore granularity coarser, especially suitable for high density of manganese oxide ore. The commonly used method has the heavy medium separation, jigging and tabling. At present our country processing process of manganese oxide ore, the ore is crushed to the general is 6 ~ 0mm and 10 ~ 0mm, and then were divided into two groups, coarse levels in jig, fine level to tabling. This type of equipment, reciprocating jig and table for type 6-S.

3, strong magnetic separation. Manganese mineral belongs to weak magnetic minerals (susceptibility than X=10 * 10-6 to 600 * 10-6cm3/g), the magnetic field intensity is Ho=800 ~ 1600kA/m (10000 ~ 20000oe) of the strong magnetic separator can be recycled, can improve the manganese grade 4% ~ 10%. Because the magnetic separator has the advantages of simple operation, easy control, strong adaptability, can be used for a variety of manganese ore beneficiation, dominant manganese ore beneficiation. The manganese is the most common grain of strong magnetic separation machine, coarse and fine intensity magnetic separator is also increasingly used, fine grain of strong magnetic separation machine is still in the experimental stage. 4, heavy - magnetic separation. In Liancheng Manganese Mine Heavy - magnetic separation plant, the main treatment of leaching manganese oxide ore, using AM-30 type jig processing 30 ~ 3mm washed ore, available manganese containing high quality manganese concentrate more than 40%, and then was selected after impurity removal, manganese powder raw material can be used as a battery. Jigging tailings and less than 3mm in diameter to wash ore grinding is less than 1m, with a strong magnetic separator, manganese concentrate grade increased by 24% ~ 25%, 36% ~ 40%. 5, strong magnetic flotation. In Zunyi manganese mine as an example, the mine is mainly low manganese in manganese carbonate, low phosphorus, high iron manganese ore. Strong magnetic separation using shp-2000 type strong magnetic separator, flotation machine is mainly used in CHF type pneumatic flotation machine. After years of production test, the performance is good, very suitable for Zunyi manganese ore dressing application. Strong magnetic flotation process flow test success and been used in production, marking China's manganese ore deep processing has a big step forward. 6, Fire Assay Preconcentration. The fire law of ore enrichment, is Gao Lin, high speed railrefractory low-grade manganese ore a sorting method, commonly known as manganese rich slag. Its essence is the use of the reduction temperature of manganese, phosphorus and iron, a high temperature separation method in blast furnace or electric furnace to control the temperature of selective separation of manganese, phosphorus and iron. Our country by pyrometallurgy enrichment has a history of nearly 40 years, fire assay preconcentration technique is simple, stable production, can effectively separate iron, phosphorus in ores, and get rich manganese, iron, phosphorus rich manganese slag. Fire for our high phosphorus enrichment of high iron and low manganese refractory mineral, is a promising processing method. 7, chemical manganese concentration method. Chemical processing of manganese, China conducted a lot of research work, including test is more and more promising is: two, black manganese sulfate and bacterial leaching of manganese. Has not yet put into industrial production.