What are the resource characteristics of wolframite and scheelite symbiosis ore?
Black-and-white tungsten mixed tungsten deposits account for a considerable proportion of the total tungsten resources, among which no representative tungsten deposits include Shizhuyuan tungsten-molybdenum-bismuth fluorite polymetallic deposit in Hunan province, Luokeng molybdenum-bearing scheelite in Fujian province and Huangshaping tungsten deposit in Guiyang, Hunan province. The reserves of tungsten resources in Shizhuyuan mine are 715.6 KT, those in Xingluokeng are 143.8 KT, and those in Huangshaping are 103 KT. In some wolframite deposits, there is usually a small amount of scheelite (usually less than 20%) which does not affect the main process structure, but only increases the separation of wolframite in the refined section. When the ratio of wolframite and scheelite is equal, the mineral characteristics of wolframite and scheelite should be taken into account in the main ore dressing process, including the selection of grinding particle size, the selection of separation method and the selection of equipment, etc. The density of wolframite and scheelite is higher than that of gangue. The mixed concentrate of wolframite and scheelite can be obtained by re-concentration and then separated. Although both wolframite and scheelite belong to tungstate, because of the difference of cations, they have distinct floatability, scheelite floats easily, and the use of fatty acids can make scheelite float up. The floatability of wolframite is much worse than scheelite. Generally, black-and-white tungsten concentrators produce black-and-white concentrate and scheelite concentrate through mineral processing. However, due to the rapid development of hydrometallurgical technology in recent years, the ratio of hydrometallurgy to wolframite and scheelite can be applied in a wider range, so for some ores, A mixed concentrate of wolframite can be produced without the need to separate the smelting of wolframite and scheelite strictly so that the recovery rate of mineral processing can be increased and the recovery of tungsten metal is beneficial. In many black and scheelite ores tungsten minerals are fine-grained and gangue minerals are complex and often require very complex processes such as the Shizhuyuan polymetallic ore in Hunan Province is a complex and difficult to concentrate ore.
