FIELD: processing of hubnerite concentrates. SUBSTANCE: mixture which comprises hubnerite concentrate (WO3 25.2 %), sodium sulfate and coke at their mass ratio 10.0:7.3-7.5:0.5-0.6 respectively is affected by caking within 1 h. The process is carried out in closed crucibles without free access of air at 800 C. Thus reduction atmosphere in reaction zone is produced, it results in fact that decomposition degree of hubnerite concentrate is 99.1-99.3 %. EFFECT: improved quality of desired product.
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