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| Study on Neutralization Precipitation of Cobalt from Leachate of Low Grade Copper-Cobalt Ore |
| Received:June 23, 2024 Revised:July 11, 2024 |
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| DOI：doi：10.20237/j.issn.1007-7545.2025.01.004 |
| KeyWord:cobalt; copper-cobalt ore; magnesium oxide; precipitation |
| Author | Institution |
| YANG Yaofeng |
迪兹瓦矿业股份有限公司 |
| ZHANG Yonglu |
北京矿冶科技集团有限公司 |
| JIE Xiaowu |
北京矿冶科技集团有限公司 |
| Xu Dengkui |
迪兹瓦矿业股份有限公司 |
| YU Yongjian |
迪兹瓦矿业股份有限公司 |
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| Abstract: |
| The effects of neutralizer dosage, time and Co/Mn ratio on the precipitation of cobalt and impurities in a low grade cobalt solution were investigated in a one-stage precipitation process using active magnesium oxide as neutralizer. The results showed that on the condition of MgO dosage of 1.20 times, 8 h, and the Co/Mn ratio of 5.95, the precipitation rates of Co and Mn were 88.30% and 44.80%, respectively. The content of Co in cobalt hydroxide products was 36.85%, and the impurities Mg and Mn were 2.15% and 2.73%, respectively. Based on the optimal conditions of one-stage cobalt precipitation, two-stage cobalt precipitation cycle tests were conducted. The results showed that the overall precipitation rates of Co and Mn were 96.63% and 34.67%, respectively, on the condition of MgO dosage of 1.20 times, Co/Mn ratio of 5.95, 8 h in the first stage and 3 h in the second stage. In cobalt hydroxide precipitation, Co was 37.16%, and impurities Mg and Mn were 2.48% and 2.56%, respectively. Compared with the one-stage cobalt precipitation, the two-stage had higher cobalt precipitation rate and lower impurity manganese precipitation rate. The two-stage cobalt precipitation process was suitable for treating the low cobalt solution. |
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