1. Study on Recovery Process of Tin from Tungsten Smelting Slag.
- Author
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YANG Chen, HUANG Wanfu, ZHANG Wenyi, LIU Guanfa, and WANG Zekai
- Subjects
TUNGSTEN ,SMELTING ,SLAG ,TIN ,TUNGSTEN alloys ,ALUMINUM smelting ,TUNGSTEN industry - Abstract
With the continuous evolution and development, smelting technology has gradually matured. After the tungsten is extracted through the smelting process, a large amount of tungsten smelting slag is piled up, which has a negative impact on human production and life. The composition of tungsten smelting slag is complex, and there is leaching agent remaining on the surface, which is rich in valuable metals, so the selection of suitable process to recover the valuable metals in tungsten smelting slag can not only reduce the solid waste emission, reduce the pollution of soil and water resources, but also improve the resource utilization rate of valuable metals and reduce the cost of tungsten smelting slag treatment. The reduction, environmental protection and resource treatment of tungsten smelting slag are the key parts of carbon emission reduction in the tungsten industry. The recovery of metal tin out of a mixed tungsten smelting slag from treatment of wolframite and scheelite was experimentally studied. In this slag about 87.59% of the tin in the tungsten smelting slag was distributed in the -0.045 mm particle size, which was difficult to sort. The Knelsen vertical centrifugal separator was selected as the roughing equipment, and the optimal conditions for the roughing process were determined by step-by-step optimization experiments, which were 78.15% -0.038 mm of the grinding fineness, 15% of the feed concentration, 90 G/s of separation cone speed, and 2.60 L/min of backflush water flow. In order to further improve the tin grade of the rough concentrate, the four selection methods were compared and tested, and finally with the gravity separation process of "one roughing and one cleaning centrifugal separation, shaking table and centrifugal separation after classification", under the feed concentration 15%, the speed of the separation cone 90 G/s and the backflush water flow rate 2.75 L/min, the tin grade of tin concentrate was 4.03% and the tin recovery was 52.41%, which realized the effective recovery of valuable metal tin in tungsten smelting slag, and provided a certain reference for the reduction and resource utilization of the tungsten smelting slag. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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