Stepwise Utilization Process to Recover Valuable Components from Copper Slag
Waste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In this paper, a stepwise extraction process was proposed to recover valuable elements (copper, iron, lead and zinc) from waste copper slag. The specific pr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/2/211 |
| _version_ | 1797396251568766976 |
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| author | Siwei Li Zhengqi Guo Jian Pan Deqing Zhu Tao Dong Shenghu Lu |
| author_facet | Siwei Li Zhengqi Guo Jian Pan Deqing Zhu Tao Dong Shenghu Lu |
| author_sort | Siwei Li |
| collection | DOAJ |
| description | Waste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In this paper, a stepwise extraction process was proposed to recover valuable elements (copper, iron, lead and zinc) from waste copper slag. The specific procedures are as follows: (1) A flotation process was adopted to enrich copper, and when the copper grade in the flotation concentrate was 21.50%, the copper recovery rate was 77.78%. (2) The flotation tailings were pelletized with limestone, then the green pellets were reduced, and the magnetic separation process was carried out. When the iron and copper grades in the magnetic concentrate were 90.21% Fe and 0.4% Cu, 91.34% iron and 83.41% copper were recovered, respectively. (3) Non-magnetic tailings were mixed with clinker and standard sand to produce common Portland cement. Several products were obtained from the waste copper slag through the proposed process: flotation concentrate, measured 21.50% Cu; magnetic concentrate, containing 90.21% TFe and 0.4% Cu; direct reduction dust, including 65.17% ZnO and 2.66% PbO; common Portland cement for building construction. The comprehensive utilization method for waste copper slag achieved zero tailing and has great potential for practical application. |
| first_indexed | 2024-03-09T00:47:42Z |
| format | Article |
| id | doaj.art-787669d3df2c4b9d8e57640e1cb235f0 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T00:47:42Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-787669d3df2c4b9d8e57640e1cb235f02023-12-11T17:24:16ZengMDPI AGMinerals2075-163X2021-02-0111221110.3390/min11020211Stepwise Utilization Process to Recover Valuable Components from Copper SlagSiwei Li0Zhengqi Guo1Jian Pan2Deqing Zhu3Tao Dong4Shenghu Lu5School 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, ChinaWaste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In this paper, a stepwise extraction process was proposed to recover valuable elements (copper, iron, lead and zinc) from waste copper slag. The specific procedures are as follows: (1) A flotation process was adopted to enrich copper, and when the copper grade in the flotation concentrate was 21.50%, the copper recovery rate was 77.78%. (2) The flotation tailings were pelletized with limestone, then the green pellets were reduced, and the magnetic separation process was carried out. When the iron and copper grades in the magnetic concentrate were 90.21% Fe and 0.4% Cu, 91.34% iron and 83.41% copper were recovered, respectively. (3) Non-magnetic tailings were mixed with clinker and standard sand to produce common Portland cement. Several products were obtained from the waste copper slag through the proposed process: flotation concentrate, measured 21.50% Cu; magnetic concentrate, containing 90.21% TFe and 0.4% Cu; direct reduction dust, including 65.17% ZnO and 2.66% PbO; common Portland cement for building construction. The comprehensive utilization method for waste copper slag achieved zero tailing and has great potential for practical application.https://www.mdpi.com/2075-163X/11/2/211waste copper slagflotationdirect reduction-magnetic separationcommon Portland cement |
| spellingShingle | Siwei Li Zhengqi Guo Jian Pan Deqing Zhu Tao Dong Shenghu Lu Stepwise Utilization Process to Recover Valuable Components from Copper Slag Minerals waste copper slag flotation direct reduction-magnetic separation common Portland cement |
| title | Stepwise Utilization Process to Recover Valuable Components from Copper Slag |
| title_full | Stepwise Utilization Process to Recover Valuable Components from Copper Slag |
| title_fullStr | Stepwise Utilization Process to Recover Valuable Components from Copper Slag |
| title_full_unstemmed | Stepwise Utilization Process to Recover Valuable Components from Copper Slag |
| title_short | Stepwise Utilization Process to Recover Valuable Components from Copper Slag |
| title_sort | stepwise utilization process to recover valuable components from copper slag |
| topic | waste copper slag flotation direct reduction-magnetic separation common Portland cement |
| url | https://www.mdpi.com/2075-163X/11/2/211 |
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