Manganese carbonate ore beneficiation process

Sedimentary carbonate manganese ore, manganese minerals are mainly rhodochrosite, calcium, manganese Rhodochrosite and calcite siderite manganese ore and gangue; silicate and carbonate minerals; often associated with sulfur and iron impurities. The ore minerals are relatively complex, fine particle size distribution to several microns, is not easy to dissociate, is often difficult to get a higher grade of concentrate. Manganese carbonate ore dressing production practice less, study the strong magnetic separation, heavy medium separation and flotation method. Some sedimentary manganese carbonate ore production of sulfur, using sequential selective flotation process of carbonaceous shale, pyrite and manganese minerals. Some hydrothermal type Pb Zn manganese carbonate ore by flotation, a strong magnetic separation process. Some sulfur rich manganese ore, manganese minerals are mainly sulfur ore roasting method, can be used for sulfur removal. Some rich manganese carbonate ore by roasting process, removal of volatile components, to obtain the finished product ore. Manganese oxide and manganese carbonate ore contains some refractory ore, manganese and iron, phosphorus symbiosis or gangue, dissemination size is very small, it is difficult to separate, can be treated by smelting method. For example, rich manganese slag treatment of high phosphorus and high iron manganese ore, the production of active manganese dioxide nitric acid leaching method and the production of manganese metal electrolytic method for industrial production. In addition, in the study with two calcium sulfate method and bacterial leaching method.

China's manganese ore is divided into 5 basic types: carbonate manganese ore, manganese ore, ore, sulfur polymetallic intergrowth of manganese ore and manganese nodules, of which the most important is the manganese ore and manganese carbonate ore. The distribution of manganese ore resources in the world is extremely unbalanced, manganese ore reserves of more than 95% concentrated in a few countries, South Africa, Australia, the Commonwealth of Independent States, Gabon, Brazil, South Africa, most of the manganese ore reserves, representing the world's total reserves of 42.8%; CIS manganese ore reserves, ranks second, accounting for 37.9% of total reserves of the world. Manganese ore dressing have in common with other metal ore dressing, but also has its particularity. Because of China's manganese ore grade is low, high impurity, ore structure complex, fine particle size distribution, low grade manganese ore by the realization of "rich" is China's manganese industry technology policy need to insist for a long time. Although the direct utilization of the low grade manganese ore processing in technical breakthrough, but if the ore washing improve the manganese ore grade, will significantly reduce the cost of production, resulting in huge economic benefits. Manganese ore in China has formed a relatively complete industrial system in the method of selecting, smelting. At present, the main method of enrichment of manganese ore gravity separation, magnetic separation, flotation has and the enrichment, or combinations of several methods. Manganese carbonate ore by flotation, gravity separation and magnetic separation are sometimes accompanied by. Separation of phosphorus in manganese carbonate, has attracted people's attention, although you can use physical dressing combined method or chemical method the deep phosphorus removal, but the cost is high, long process, manganese, manganese mine loss is its limitation, no substantive breakthrough. In recent years, bioleaching has got great development in the field of heavy metal sulfide ore, manganese carbonate in lower phosphorus research has just started, continue to strengthen research, is expected to be a breakthrough.