Direct reducing preparation method of ultra-fine tungsten powder

The invention provides a direct reducing preparation method of ultra-fine tungsten powder. The method comprises the following steps that industrial wet ammonium paratungstate extracted from tungsten ore serves as raw material; wet mixing is conducted on the industrial wet ammonium paratungstate and...

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Bibliographic Details
Main Authors SUN FUDUN, ZHANG LIJUAN, ZHU YUBIN
Format Patent
LanguageChinese
English
Published 23.11.2016
Subjects
CASTING
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
WORKING METALLIC POWDER
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Summary:The invention provides a direct reducing preparation method of ultra-fine tungsten powder. The method comprises the following steps that industrial wet ammonium paratungstate extracted from tungsten ore serves as raw material; wet mixing is conducted on the industrial wet ammonium paratungstate and blue tungsten powder in a blender mixer; under hydrogen atmosphere, low temperature direct reducing is conducted on wet powder to prepare the tungsten powder with ultra-fine particles; reducing temperature is 600-950 DEG C; holding time is 50-180 min; the tungsten powder with ultra-fine particles are obtained; and the average particle diameter is 0.5-2 [mu]m. The method has the advantages that drying procedures on ammonium paratungstate are reduced; investment on equipment is small; technical process is shortened; producing cost of products is lowered; the quality of the powder is stable; and the method is suitable for industrial production. 本发明提供了种直接还原制备超细钨粉的方法，以钨矿中提取的工业用湿仲钨酸铵为原料，在混料机中与蓝钨粉进行湿混，随后在氢气气氛下，将湿粉末进行低温直接还
Bibliography:Application Number: CN20151155572