METHOD OF PRODUCING TUNGSTEN POWDER

摘要

FIELD: process engineering. ^ SUBSTANCE: invention relates to production of disperse metal powders of tungsten by reduction of its compounds using gassy reducing agents. Nano-structured tungsten powder particles sized to 30 nm with specific surface of 0.34-0.40 m2/g are produced by reduction of ammonium paratungstate at 700-1000C with subsequent treatment by hydrogen at 400-600C. Note here that reduction of ammonium paratungstate and subsequent treatment by hydrogen are carried out continuously in the same reaction volume by varying composition of gas phase fed into reaction zone. ^ EFFECT: higher efficiency. ^ 1 ex