Separation of non-ferrous iron from copper smelting slag and preparation of iron oxide yellow pigment

YANG Yifan; YI Yuanrong; ABUDUPUL Asguri; GAO Xiang; MA Shuo; LIU Yitong

doi:10.13205/j.hjgc.202511020

Volume 43 Issue 11

Nov. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(11): 179-186

YANG Yifan, YI Yuanrong, ABUDUPUL Asguri, GAO Xiang, MA Shuo, LIU Yitong. Separation of non-ferrous iron from copper smelting slag and preparation of iron oxide yellow pigment[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 179-186. doi: 10.13205/j.hjgc.202511020

Citation:

YANG Yifan, YI Yuanrong, ABUDUPUL Asguri, GAO Xiang, MA Shuo, LIU Yitong. Separation of non-ferrous iron from copper smelting slag and preparation of iron oxide yellow pigment[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 179-186. doi: 10.13205/j.hjgc.202511020

Citation:

YANG Yifan, YI Yuanrong, ABUDUPUL Asguri, GAO Xiang, MA Shuo, LIU Yitong. Separation of non-ferrous iron from copper smelting slag and preparation of iron oxide yellow pigment[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 179-186. doi: 10.13205/j.hjgc.202511020

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Separation of non-ferrous iron from copper smelting slag and preparation of iron oxide yellow pigment

doi: 10.13205/j.hjgc.202511020

1. College of Ecology and Environment, Xinjiang University, Urumqi 830000, China;
2. Mineral Processing Technology Department, Xinjiang Institute of Non-Ferrous Metals, Urumqi 830000, China

Received Date: 2024-12-26
Accepted Date: 2025-02-26
Rev Recd Date: 2025-02-01

Available Online: 2026-01-09

Abstract

Abstract

The annual output of copper smelting slag in the world exceeds 50 million tons， and stacking is the current mainstream copper smelting slag treatment method， which causes the risk of heavy metal overflow and potential environmental pollution. In this paper， non-ferrous iron was extracted from copper smelting slag by sulfuric acid leaching to prepare ferrous sulfate solution， and then iron oxide yellow pigment was prepared by air oxidation. The influence of key parameters， such as leaching liquid concentration， air flow， temperature， treating time， raw material particle size and crystal seed addition was investigated by the experiments. The results showed that when the leaching temperature was set at 95 ℃， the leaching time was 2 hours， and the liquid-solid ratio was 5∶1， the leaching efficiency of iron in copper smelting slag was as high as 96.5%. When the ratio of crystal to seed was 33%， the oxidation time was 50 h， the air volume was 0.8 m³/h， and the terminal pH value was adjusted to 3.5， the content of Fe₂O₃ in the prepared iron oxide yellow pigment reached 86.4%. This process has the advantages of wide availability of raw materials and simple experimental operation， and provides a new utilization path for copper smelting slag.
- copper smelting slag,
- iron oxide yellow,
- sulfuric acid leaching,
- oxidation purification

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References(35)

References

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