Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology
The reserve of the copper-oxide-bearing limonite ore (COBL ore) in Yulong Copper Co., Ltd. is up to 20 million tons with 1.79% of copper content. The characters of the copper resources in the COBL ore are high-proportioned oxidation state (99.98%) and combined state (84.83%). The combined copper oxi...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/12/10/1258 |
| _version_ | 1797470987556487168 |
|---|---|
| author | Zaihua Peng Xinzhuang Fu Zujiang Pan Ya Gao Dongdong He Xiaohui Fan Tong Yue Wei Sun |
| author_facet | Zaihua Peng Xinzhuang Fu Zujiang Pan Ya Gao Dongdong He Xiaohui Fan Tong Yue Wei Sun |
| author_sort | Zaihua Peng |
| collection | DOAJ |
| description | The reserve of the copper-oxide-bearing limonite ore (COBL ore) in Yulong Copper Co., Ltd. is up to 20 million tons with 1.79% of copper content. The characters of the copper resources in the COBL ore are high-proportioned oxidation state (99.98%) and combined state (84.83%). The combined copper oxide is mainly copper-oxide-bearing limonite, which has a copper content of more than 78%. Because of the high altitude and average annual temperature of 15 °C in Tibet, fire leaching cannot be adopted. The leaching efficiency of copper from COBL ore using direct leaching of sulfuric acid is only 40%, which is greatly influenced by temperature and time. Based on the characteristics of COBL ore, a novel combined method of magnetic separation and individual leaching has been proposed to efficient recover copper resources. Experimental results show that the magnetic concentrates and tailings were obtained by magnetic separation of COBL ore at 0.6 T with the yields were 59.65% and 40.35%, respectively. Due to the obvious leaching properties difference of the magnetic concentrates and tailings, individual leaching process routes were used to treat them. The magnetic concentrate was leached with stirring for 3 days at room temperature (20 °C), and the magnetic tailing was easily leached for 4 h at 40 °C. The recovery efficiency of total copper was 72%, which was about 32% higher than that of the single leaching of the COBL ore. The method proposed in this study achieves environmentally friendly, low energy consumption, and efficient extraction of refractory copper oxide ore. |
| first_indexed | 2024-03-09T19:43:10Z |
| format | Article |
| id | doaj.art-3066f0511c444c8a84f59c3a73c81afd |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T19:43:10Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-3066f0511c444c8a84f59c3a73c81afd2023-11-24T01:29:35ZengMDPI AGMinerals2075-163X2022-10-011210125810.3390/min12101258Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching TechnologyZaihua Peng0Xinzhuang Fu1Zujiang Pan2Ya Gao3Dongdong He4Xiaohui Fan5Tong Yue6Wei Sun7School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaThe reserve of the copper-oxide-bearing limonite ore (COBL ore) in Yulong Copper Co., Ltd. is up to 20 million tons with 1.79% of copper content. The characters of the copper resources in the COBL ore are high-proportioned oxidation state (99.98%) and combined state (84.83%). The combined copper oxide is mainly copper-oxide-bearing limonite, which has a copper content of more than 78%. Because of the high altitude and average annual temperature of 15 °C in Tibet, fire leaching cannot be adopted. The leaching efficiency of copper from COBL ore using direct leaching of sulfuric acid is only 40%, which is greatly influenced by temperature and time. Based on the characteristics of COBL ore, a novel combined method of magnetic separation and individual leaching has been proposed to efficient recover copper resources. Experimental results show that the magnetic concentrates and tailings were obtained by magnetic separation of COBL ore at 0.6 T with the yields were 59.65% and 40.35%, respectively. Due to the obvious leaching properties difference of the magnetic concentrates and tailings, individual leaching process routes were used to treat them. The magnetic concentrate was leached with stirring for 3 days at room temperature (20 °C), and the magnetic tailing was easily leached for 4 h at 40 °C. The recovery efficiency of total copper was 72%, which was about 32% higher than that of the single leaching of the COBL ore. The method proposed in this study achieves environmentally friendly, low energy consumption, and efficient extraction of refractory copper oxide ore.https://www.mdpi.com/2075-163X/12/10/1258copper-oxide-bearing limonitecombined copper-oxidemagnetic separationcountercurrent leachingcomplex mineral resources |
| spellingShingle | Zaihua Peng Xinzhuang Fu Zujiang Pan Ya Gao Dongdong He Xiaohui Fan Tong Yue Wei Sun Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology Minerals copper-oxide-bearing limonite combined copper-oxide magnetic separation countercurrent leaching complex mineral resources |
| title | Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology |
| title_full | Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology |
| title_fullStr | Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology |
| title_full_unstemmed | Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology |
| title_short | Efficient Recovery of the Combined Copper Resources from Copper Oxide Bearing Limonite Ore by Magnetic Separation and Leaching Technology |
| title_sort | efficient recovery of the combined copper resources from copper oxide bearing limonite ore by magnetic separation and leaching technology |
| topic | copper-oxide-bearing limonite combined copper-oxide magnetic separation countercurrent leaching complex mineral resources |
| url | https://www.mdpi.com/2075-163X/12/10/1258 |
| work_keys_str_mv | AT zaihuapeng efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT xinzhuangfu efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT zujiangpan efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT yagao efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT dongdonghe efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT xiaohuifan efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT tongyue efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology AT weisun efficientrecoveryofthecombinedcopperresourcesfromcopperoxidebearinglimoniteorebymagneticseparationandleachingtechnology |