Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation
Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitig...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Zhichao [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Self-assembled 3D hierarchical MnCO - Rajendiran, Rajmohan ELSEVIER, 2020, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:335 ; year:2022 ; day:10 ; month:02 ; pages:0 |
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| DOI / URN: |
10.1016/j.jclepro.2022.130356 |
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ELV056603630 |
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| 245 | 1 | 0 | |a Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation |
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| 520 | |a Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. | ||
| 520 | |a Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. | ||
| 650 | 7 | |a Vacuum distillation |2 Elsevier | |
| 650 | 7 | |a Directional sulfuration |2 Elsevier | |
| 650 | 7 | |a Copper telluride slag |2 Elsevier | |
| 650 | 7 | |a Cleaner production |2 Elsevier | |
| 650 | 7 | |a Tellurium |2 Elsevier | |
| 700 | 1 | |a Deng, Juhai |4 oth | |
| 700 | 1 | |a Liu, Dachun |4 oth | |
| 700 | 1 | |a Jiang, Wenlong |4 oth | |
| 700 | 1 | |a Zha, Guozheng |4 oth | |
| 700 | 1 | |a Huang, Daxin |4 oth | |
| 700 | 1 | |a Deng, Pan |4 oth | |
| 700 | 1 | |a Li, Baole |4 oth | |
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10.1016/j.jclepro.2022.130356 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001654.pica (DE-627)ELV056603630 (ELSEVIER)S0959-6526(22)00002-6 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Zhichao verfasserin aut Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Vacuum distillation Elsevier Directional sulfuration Elsevier Copper telluride slag Elsevier Cleaner production Elsevier Tellurium Elsevier Deng, Juhai oth Liu, Dachun oth Jiang, Wenlong oth Zha, Guozheng oth Huang, Daxin oth Deng, Pan oth Li, Baole oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:335 year:2022 day:10 month:02 pages:0 https://doi.org/10.1016/j.jclepro.2022.130356 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 335 2022 10 0210 0 |
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10.1016/j.jclepro.2022.130356 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001654.pica (DE-627)ELV056603630 (ELSEVIER)S0959-6526(22)00002-6 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Zhichao verfasserin aut Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Vacuum distillation Elsevier Directional sulfuration Elsevier Copper telluride slag Elsevier Cleaner production Elsevier Tellurium Elsevier Deng, Juhai oth Liu, Dachun oth Jiang, Wenlong oth Zha, Guozheng oth Huang, Daxin oth Deng, Pan oth Li, Baole oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:335 year:2022 day:10 month:02 pages:0 https://doi.org/10.1016/j.jclepro.2022.130356 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 335 2022 10 0210 0 |
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10.1016/j.jclepro.2022.130356 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001654.pica (DE-627)ELV056603630 (ELSEVIER)S0959-6526(22)00002-6 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Zhichao verfasserin aut Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Vacuum distillation Elsevier Directional sulfuration Elsevier Copper telluride slag Elsevier Cleaner production Elsevier Tellurium Elsevier Deng, Juhai oth Liu, Dachun oth Jiang, Wenlong oth Zha, Guozheng oth Huang, Daxin oth Deng, Pan oth Li, Baole oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:335 year:2022 day:10 month:02 pages:0 https://doi.org/10.1016/j.jclepro.2022.130356 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 335 2022 10 0210 0 |
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10.1016/j.jclepro.2022.130356 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001654.pica (DE-627)ELV056603630 (ELSEVIER)S0959-6526(22)00002-6 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Zhichao verfasserin aut Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Vacuum distillation Elsevier Directional sulfuration Elsevier Copper telluride slag Elsevier Cleaner production Elsevier Tellurium Elsevier Deng, Juhai oth Liu, Dachun oth Jiang, Wenlong oth Zha, Guozheng oth Huang, Daxin oth Deng, Pan oth Li, Baole oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:335 year:2022 day:10 month:02 pages:0 https://doi.org/10.1016/j.jclepro.2022.130356 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 335 2022 10 0210 0 |
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10.1016/j.jclepro.2022.130356 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001654.pica (DE-627)ELV056603630 (ELSEVIER)S0959-6526(22)00002-6 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Zhichao verfasserin aut Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. Vacuum distillation Elsevier Directional sulfuration Elsevier Copper telluride slag Elsevier Cleaner production Elsevier Tellurium Elsevier Deng, Juhai oth Liu, Dachun oth Jiang, Wenlong oth Zha, Guozheng oth Huang, Daxin oth Deng, Pan oth Li, Baole oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:335 year:2022 day:10 month:02 pages:0 https://doi.org/10.1016/j.jclepro.2022.130356 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 335 2022 10 0210 0 |
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Waste-free separation and recovery of copper telluride slag by directional sulfidation-vacuum distillation |
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Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. |
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Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. |
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Copper telluride slag is a high-value secondary resource generated by copper smelting systems, but it is typically treated using acid and alkaline liquids, which generate toxic waste. Exploring innovative green and efficient methods for tellurium recycling can improve production efficiency and mitigate ecological hazards. In this work, a clean and efficient method for the separation and extraction of tellurium by directional sulfurization-vacuum distillation was proposed. First, the Cu–Te chemical bonds in copper telluride slag were broken by S, which formed Cu–S chemical bonds and elemental Te and achieved the separation effect. Secondly, elemental Te was extracted by vacuum distillation. The feasibility of the method was confirmed by theoretical analysis. The experimental results showed that the optimal temperature of directional sulfidation was 400 °C, while the experimental parameters of distillation were 650 °C for 60 min and the pressure was 10–20 Pa. The tellurium content extracted from the raw slag was 97.60%, and its purity was 96.37%. All the copper in the raw material was enriched in the form of sulfide in the distillation residue. The volatiles could be directly used as crude tellurium products, and the residues could be reused in pyrometallurgical copper smelting processes. Compared with the traditional process, this proposed process is short and greatly eliminates the loss of tellurium due to multiple dispersion. The process does not produce three wastes and is friendly to the environment, as shown by the economic and sustainability evaluation. This research provides a clean and sustainable method for treating copper telluride slag for the metallurgical industry. |
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