Manganese ores are mainly used in iron and steel industries and the ratio of the ore consumption to the iron and steel output ranges from 3.6% to 4% in China. If China produces 120 million tons of iron and steel, then 4.8 million tons of manganese ores are needed. In recent years, the export of Mn-series alloys has had favorable conditions, especially in 1995 when 177,000 tons of Mn-Fe alloy and 447,000 tons of Mn-Si alloy were exported. The export volume of Mn-series products of 2010 is estimated at 700,000 tons, which will need 2.1 million tons of ores (one ton of alloy consuming three tons of ores). As the addition of the above two items, 6.9 million tons of processed ore will be consumed in 2010. It is estimated based on the resources and production that the output of processed ores will be up to 5 million tons in 2010 and thus there will be a shortage of about 2 million tons to meet the demand. The following measures are to be taken to solve the problem of short supply and low grade of manganese ores in China.
(1) Strengthening the exploration of manganese ore, especially rich manganese ore
China has fairly good metallogenic conditions of manganese ore and is endowed with abundant manganese resources. There are a great number of prospective areas, such as weathering Fe-Mn ore deposits in the Lanshan area in Hunan Province, southwestern Fujian Province, and Mengsong, Yunxian-Lancang and Menglian-Cangyuan areas in Yunnan, as well as southwestern Guangxi, southeastern Yunnan, Hunan, Guizhou and Sichuan provinces. Further exploration should be carried out to expand ore reserves and seek for new deposits in these areas.
(2) Making more efforts to study technological mineralogy and dressing technologyHenan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,magnetic separator,jaw crushers Welcome all of you to visit our official website.raw material mill:http://www.hxjq-crusher.com/62.html
In consideration of low grade, fine grain size and high content of phosphorus and iron from the manganese ore in China, technological mineralogy is important for improving ore-dressing techniques to deal with the sorting and dephosphoration of hundreds of millions of tons of microgranular or fine-grained manganese ores.
(3) Further developing rich-Mn slagging technology
This technique can be used to effectively separate Fe and P from manganese ores to obtain rich Mn-slagging products with high Mn but low Fe and P. This technique has been employed in China for years. This technology is to be further applied on a large scale, so that high-P, high-Fe and low-Mn ores can be rationally used.
(4) Rationally utilizing both domestic and foreign Mn resources
Since there is a prominent unbalance between supply and demand, and on the other hand the grade of manganese ore is rather low, the import of rich manganese ore will be necessary for a period of considerable length in the future and will increase annually to reach 2 million tons in 2010.
(5) Paying attention to total utilization of manganese ore
China's manganese deposits usually have various beneficial components. In currently employed ore-dressing processes, Fe, Pb, Zn and Ag can be recovered, but many other elements such as Cu, Co, Ni, Bi, S, P, B, Ga, In and Tl still await recovery. The utilization of so-called 'three wastes', i.e. tailings, waste residues and waste gases, is also an significant research subject. The utilization of 'three wastes' will not only turn wastes into things of value and increase economic profits of enterprises, but also be beneficial to environmental protection and future generations.
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