Tungsten Deposit Types and Tungsten Concentrate Standards
2022-12-09 Xinhai (72)
2022-12-09 Xinhai (72)
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1. Quartz vein-type tungsten deposit
Such ores often contain wolframite, cassiterite, molybdenite, beryl, chalcopyrite, galena, sphalerite, siderite, arsenopyrite, scheelite, etc. This type of deposit is the main type of industrial deposit currently being developed, accounting for about 25% of the country's proven reserves.
2. Quartz veinlet-type tungsten deposit
The ore deposits are produced in granite or metamorphic rocks, and the ore bodies are denser tungsten-containing quartz veinlets. The reserves of such deposits account for about 10% of the country's proven reserves.
3. Skarn-type tungsten deposits
The ore body is lens-like, layered, and complex in shape. The ore often contains scheelite, wolframite, cassiterite, molybdenite, chalcopyrite, galena, sphalerite, siderite, arsenopyrite, pyrrhotite, magnetite, fluorite, etc. The ore grade varies greatly, and the scale is large to huge. The reserves of such deposits account for about 40% of the proven reserves in the country.
4. Vein-disseminated tungsten deposits
The ore bodies in the deposit are produced in fine and dense tungsten-containing quartz veinlets, the ore is in a disseminated structure, and the scale of the ore body and the ore grade vary greatly. The reserves of such deposits account for about 8% of the country's proven reserves.
The quality standards for tungsten concentrates are not uniform in the world. Usually, smelters purchase the required tungsten concentrates according to their technological conditions.
The new tungsten concentrate quality standard divides the WO3 content of tungsten concentrate into five grades: 50%, 55%, 60%, 65%, and 68%. It is beneficial to maintain a high recovery rate for some refractory tungsten ores.
Due to the progress of hydrometallurgy technology, the new standard adds black and white mixed concentrate products, which is beneficial to tungsten beneficiation plants where it is difficult to separate black and white tungsten. Fine mud recovery.
Mixed tungsten concentrate refers to tungsten concentrate without strict separation of black tungsten and scheelite. Tungsten slime refers to tungsten products with fineness less than 0.074mm (WO330%-40%) and high impurity content.
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