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Resource Utilization of Copper Smelting Slag:Blending Optimization and Sintering Behavior Regulation
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Xiaolyu YU1, Yanhui LIANG2, 3, Feng GAO1, An LI2, 3, Yanwei XU1, Weiwei LIU2, 3
Mining and Metallurgical Engineering | 2026, 46(4) : 175 - 182
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Mining and Metallurgical Engineering | 2026, 46(4): 175-182
• METALLURGY •
Resource Utilization of Copper Smelting Slag:Blending Optimization and Sintering Behavior Regulation
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Xiaolyu YU1, Yanhui LIANG2, 3, Feng GAO1, An LI2, 3, Yanwei XU1, Weiwei LIU2, 3
Affiliations
  • 1.Yimen Copper Industry Co., Ltd., Yuxi 651199, Yunnan, China
  • 2.Kunming Metallurgical Research Institute Co., Ltd., Kunming 650021, Yunnan, China
  • 3.State Key Laboratory of New Enhanced Metallurgical Technology for Non-ferrous Metals, Kunming 650021, Yunnan, China
doi: 10.3969/j.issn.0253-6099.2026.04.027
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To optimize the blending of copper slag and copper concentrate in copper smelting process, thermodynamic analysis, phase-diagram calculation and experimental research were combined to systematically investigate the effects of blending ratio on phase evolution, sintering characteristics and sulfur separation behavior. The results show that an increase in the copper slag ratio from 40% to 60% leads to a remarkable rise in the fraction of oxide phases and a drop in the fraction of sulfide phases in the system, as well as higher liquid-phase-forming capacity. The structure of the sintered product gradually changes from loose and porous to dense and continuous, and reaches its most stable state when the copper slag ratio ranges from 50% to 60%. A higher copper slag ratio facilitates the formation of Fe-Ca-Si composite oxides, which greatly enhances the structural stability of sintered products. With a rise in oxygen concentration from 40% to 60%, sulfur volatilization capacity is substantially improved, and the sulfur volatilization efficiency rises by 11 percentage points.

copper smelting slag  /  copper concentrate  /  blending ratio  /  sintering behavior  /  phase evolution  /  sulfur separation
余小吕, 梁艳辉, 高峰, 李安, 徐严伟, 刘维维. 铜冶炼渣资源化利用：配伍优化与烧结行为调控研究. 矿冶工程杂志, 2026 , 46 (4) : 175 -182 . DOI: 10.3969/j.issn.0253-6099.2026.04.027
Xiaolyu YU, Yanhui LIANG, Feng GAO, An LI, Yanwei XU, Weiwei LIU. Resource Utilization of Copper Smelting Slag:Blending Optimization and Sintering Behavior Regulation[J]. Mining and Metallurgical Engineering, 2026 , 46 (4) : 175 -182 . DOI: 10.3969/j.issn.0253-6099.2026.04.027
Appendix
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Year 2026 volume 46 Issue 4
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.04.027
  • Receive Date：2026-03-04
  • Online Date：2026-10-08
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  • Received：2026-03-04
Funding
Affiliations
    1.Yimen Copper Industry Co., Ltd., Yuxi 651199, Yunnan, China
    2.Kunming Metallurgical Research Institute Co., Ltd., Kunming 650021, Yunnan, China
    3.State Key Laboratory of New Enhanced Metallurgical Technology for Non-ferrous Metals, Kunming 650021, Yunnan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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