High-temperature selective extraction of tungsten from tungsten concentrates in ionic melts
2002
It was shown experimentally that tungsten ores and concentrates are decomposed in sodium chloride-sodium metasilicate melts at 1050-1100°C to form two immiscible phases: tungstate-halide and silicate ones. Tungsten makes up 96-99% of the ore components in the former phase and more than 90% in the latter phase.
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