Magnetic separation: commonly used to select some iron minerals, such as siderite, used for iron containing very low barium based pharmaceutical raw material of barite.
Gravity separation: ore washing, screening, crushing, grading desliming, by jigging process, you can get better quality concentrate, the product grade of more than 88%. The concentrate of Hengnan barite mine can be up to 92% by gravity dressing. The local people with indigenous ore washing, per person per day can obtain concentrate 100kg. Crushing is generally used in jaw crusher or impact crusher, and fine crushing is generally used for roller crusher. Selection of heavy media can be used to drum sorting machine, cone classifier, jig sorting machine or shaking table, screw machine, etc.. Barite disseminated size greater than 2mm, usually available, HMS jigging. The maximum particle size of dense media separation is 50mm, and the maximum particle size of wet and dry jigging is about 20mm. The particle size of the cloth is smaller than 2mm and can be sorted by shaking table or spiral classifier. Must use the hydrocyclone to remove mud in order to improve the separation effect before selection.
The beneficiation methods of barite include hand sorting, gravity separation, magnetic separation and flotationHand picked: after mining the original ore, with simple manual hand election, it is a common method of mineral processing in many rural small mining. Some mines, due to their high geological grade and stable quality, have been selected by hand to meet the requirements of foreign trade. Such as Guangxi Xiangzhou pan Cun mine, selected rich ore by hand method, particle size of 30 ~ 150mm, BaSO4>95%, general can be greater than 92%. The hand picking method is simple and easy to operate without any equipment, but it has low productivity and large waste of resources.
