China Nonferrous Metallurgy

The content of barium sulfate in copper anode slime is of great significance to the further metallurgical treatment of copper anode slime. At present, the commonly used barium sulfate measurement methods include turbidimetry, spectrophotometry, inductively coupled plasma spectroscopy, etc. When the sample composition is relatively complex, general measurement methods tend to convert barium element into barium carbonate precipitate and then into the form of soluble barium salt for measurement. In this paper, by taking advantage of low solubility of barium sulfate, a saturated solution of hydrochloric acidammonium bifluoridenitric acid potassium chlorate is used to dissolve the coexisting substances of barium sulfate, and then the content of barium sulfate in the sample is determined by gravimetric method. The test results show that the detection limit of barium sulfate in this method is 9mg. When the content of barium sulfate is between 8% and 15%, the relative error is not greater than ±3%, which can meet the requirements of production control. This method provides a new idea for measurement of barium sulfate.