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Since Africa coltan ore prices rose sharply in 2000, after due. COM speculation and multiple orders, African mines produce of coltan iron coltan ore processing and niobium production dropped significantly. This has been the United States geological survey related survey data. Belgium of tantalum and niobium international study center (closely related to the country traditionally as Congo) has recommended sodium cyanide price that international sellers, from the moral Angle to avoid buying from the Congolese coltan:


"Democratic republic of the Congo, Rwanda and other African countries, in the past is the main source of tantalum coltan ore processing. Warlords, however, do not hesitate to undermine national park ecology, diamonds and other mineral resources and gain profit to the continuation of the civil war. This research center, called on members, shall carefully check tantalum coltan ore processing is derived from legal sources. For personal gain and harm to the locals, wildlife or the environment is not acceptable." Leaving aside the moral consideration, however, from a purely economic perspective, coltan ore processing supplier start from traditional areas such as Australia, transferred to the new location, such as Egypt. May by the world's largest suppliers, Australia's Sons of Gwalia co., LTD., caused by the bankruptcy, but the company still produce and export coltan ore processing. Coltan (Coltan), Africa's vernacular of columbite - tantalite the composite gold heap leaching deposits. Coltan is a kind of metal containing niobium and tantalum. Contain tantalum concentrate generally refers to the "tantalite". Viewed from the outside, coltan is a black mineral deposits. It is important to note that the export of coltan is one of the battle of Congo fuse, the conflict with a death toll as high as 4 million. Now, Rwanda and Uganda by the democratic republic of the Congo to steal coltan, then tin exports to the west in metallurgical industry is mainly used for the production of tinplate (tin) and all kinds of alloy. Tinplate is the main consumption of tin, tin accounts for about 40% of the consumption of left and right sides, it can be used as a food and beverage containers, a variety of packaging materials, household appliances and dry battery shell, etc. Tin lead and a small amount of antimony is low melting point alloy solder, it accounts for 20% of the amount of tin. Bearing alloy is an alloy of tin, lead, antimony, copper. Containing tin bronze is widely used in ship, chemical industry, construction, currency and many other aspects.


Manganese products containing metallurgical manganese ore, manganese carbonate ore powder, chemical manganese dioxide battery and manganese dioxide ore powder and so on. Using manganese metallurgy parts, light industry and chemical part small gold wash plant of the product according to the different USES of manganese products have different quality requirements. (a) metallurgical industry for manganese coltan ore processing quality requirements for steelmaking pig iron, pig iron, iron mirror coltan manganese content in the ore processing, iron uninhibited, coltan ore processing total content of manganese and iron in best can reach 40% ~ 50%.