Energy-saving and environmentally-friendly methods extraction of tungsten and tungsten ore concentrate – an integral part of environment and human healt

Abstract

It is shown that tungsten is extracted from tungsten ores and concentrates in sodium chloride-sodium metasilicate melts into the halide phase at a temperature of 1050 to 1050-1100°C. The compositions of the melts that provide the extraction efficiency as high as 99% and maximal ratios of separation of the components between the phases are chosen.