FIELD: chemistry.
SUBSTANCE: invention can be used in tungsten metallurgy. A solution of an alkali metal and a solution of an inorganic acid are continuously fed into a reactor or cascade of reactors in molar ratio of an inorganic acid to tungstate ranging from 4:1 to 9:1 while stirring continuously. Sodium tungstate is mainly used as the alkali metal tungstate and the mineral acid used is a solution of sulphuric acid containing 50-70 wt % H2SO4. Tungstic acid powder has apparent density in accordance with ASTM B 329 of at least 1.5 g/cm3 and can be used to make tungsten metal powder.
EFFECT: invention enables to obtain tungstic acid powder with spherical morphology, having high apparent density and good fluidity.
20 cl, 4 ex
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