Alkaline hydrolysis is carried out with tungsten ore as raw material. Crush wolframite (the main component is MriW04. FeW04) to 320 mesh, add 30% sodium hydroxide to the reactor for alkaline hydrolysis, and react with calcium chloride to synthesize calcium tungstate after alkaline hydrolysis, and react calcium tungstate with hydrochloric acid Generate tungstic acid, then react with sodium hydroxide to generate sodium tungstate, evaporate and crystallize, centrifuge, dehydrate, and dry to obtain the finished product of sodium tungstate.
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