Recovery of Tungsten Values from Low Grade Ore-I

Details of Present/existing/Technology. Shortfall/Technological gaps in the existing technology

Due to high density and high temperature properties, tungsten is a very important metal both strategically and industrially. Most of the present demand is met through imports of powder and concentrates. The available Indian deposits are of very low grade ranging from 0.04 to 0.2 % WO₃ against the commonly exploited ore grades of 0.5% WO₃ world over.

The existing process for the beneficiation of tungsten ore basically consists of processing of the ore by physical methods like gravity and magnetic separation to get the concentrate. But considering the low metal content and the fine dissemination of tungsten bearing minerals in the gangues in the run-of-mine ore, normally it is difficult to get the desired grade of the concentrate. Alternatively, efforts of obtaining a high grade concentrate by fine sized pulverisation and multi-stage processing leads to high losses of tungsten values. There has been a need to develop a suitable process for the recovery of tungsten values from lean grade ores. The new technology addresses this problem.

 

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