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| Study on Alkali Melting Roasting and Water Leaching of Cemented Carbide Grinding Waste in Sodium Carbonate System |
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Received:March 16, 2022
Revised:March 23, 2022
Accepted:March 31, 2022
Published Online:June 17, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.07.012 |
| KeyWord:waste cemented carbide；alkali melting roasting；grinding waste；water leaching |
| Author | Institution |
| HE Shan-ming |
江西理工大学材料冶金化学学部 |
| PAN Jie-chang |
江西理工大学材料冶金化学学部 |
| LI Wen-jun |
江西理工大学材料冶金化学学部 |
| XU Guo-zuan |
崇义章源钨业股份有限公司 |
| CHEN Bang-ming |
崇义章源钨业股份有限公司 |
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| Abstract: |
| Cemented carbide grinding waste was treated by sodium carbonate alkali melting roasting and water leaching. Effects of roasting temperature, alkali dosage, roasting time, and water leaching parameters on WC conversion were systematically investigated. Under the optimum conditions of alkali melting roasting and water leaching, leaching rate of WO3 is 98% above, and the tungsten components in grinding waste can be transformed into crude sodium tungstate solution in one step. Increasing roasting temperature and alkali dosage can effectively improve leaching rate of WO3. Through adjusting pH value of crude sodium tungstate solution to 9—11, the concentration of impurities such as Cu, Cr and SiO2 in solution can be reduced. |
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