Results of Investigations on Drawing into Economic Circulation

Abstract

Target of research was waste of hydrometallurgical processing of tungsten concentrates (sheelite and wolframite) - dump cakes, stored in sludge dump of plant. The aim of work was process engineering of dump cakes processing, guaranteed extraction from its products of enrichments, that could be entirely drawing into economic circulation. In laboratory conditions with the use of gravity methods of enrichments from cakes were extracted weight fraction, enriched by compounds of tungsten and molybdenum, and light fraction, consisting basically from calcites, fluorites, quartz, iron oxides, magnesium and aluminum. Both products of separation process were possessed by properties of capital goods: the weight fraction of gravity on its quality is secondary tungsten raw material, that could be profitably reprocessed by means of existing technique at plant. There were described results of tests on compression strength of samples of heavy-weight concrete, proving the possibility of reduction by 20-30% of the cement.