Calcium tungstate-hydrochloric acid decomposition method crush wolframite and react with sodium hydroxide to generate sodium tungstate. The solution is filtered and purified, and then undergoes metathesis reaction with calcium chloride solution to obtain calcium tungstate, which is then treated with hydrochloric acid. The generated tungstic acid is washed, dried and pulverized to obtain the finished tungstic acid.
Hydrochloric acid decomposition method After alkali hydrolysis of wolframite and sodium hydroxide, react with hydrochloric acid and ammonium chloride solution, filter and wash to obtain refined ammonium tungstate solution, then hydrochloric acid hydrolysis to obtain tungstic acid, and then dehydration, Dry and pulverize to get the finished tungstic acid.
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