Abstract
Preparation conditions of tungsten powder by the decomposition of the scheelite concentrate in the medium of NaCl–Na2CO3, NaCl–Na2CO3–NaF, and NaCl–Na2CO3–Na3AlF6 salt melts and the reduction of formed sodium tungstate with aluminum at 1123–1273 K are investigated. It is established that the powder yield is ~93 wt % and purity of tungsten is 97%. Granulometric characteristics of powders are determined. It is shown that the specific surface of powders reaches 14.6 × 105 m–1.
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