| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
YU Chunmei, WANG Ling, ZHANG Qing, MA Baozhong, FU Xin, WANG Chengyan. Process Mineralogy Study on Hard Lump Forming in Copper Smelting Flue of ISA Furnace[J]. Conservation and Utilization of Mineral Resources, 2021, 41(3): 43-48. doi: 10.13779/j.cnki.issn1001-0076.2021.03.006
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Process Mineralogy Study on Hard Lump Forming in Copper Smelting Flue of ISA Furnace
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Abstract
During the process of copper smelting in Isa furnace, the scraper was worn badly due to hard lump formed in flue, and the flue gas circulation was blocked, which affected the production efficiency and stability. In this paper, from the perspective of process mineralogy, the occurrence state of copper, iron, sulfur and other main elements from the residual heat boiler flue products of the Isa furnace, as well as the mineral phase composition and structure characteristics of hard lump were examined. And the factors leading to the formation of hard lump in flue were analyzed. The results show that the content of copper ferrite, hematite, magnetite, matte and silicate glass phase in hard lump is obviously high. And these mineral phases often adhere and cement copper sulfate in the form of nuclei to form slags with relatively high hardness, which was related to the strong splashing of slag and matte during smelting. Due to the high temperature and oxygen content of the flue gas flow, the slagging continues to grow accompanied by repeated adhesion and secondary reactions. According to the research results, the slagging problem in the flue can be effectively improved by controlling the flow of the spray gun and the negative pressure in the furnace, appropriately reducing the temperature of the dust and expanding the diameter of the vertical flue.
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Keywords:
- isa furnace /
- copper smelting /
- dust /
- flue hard lump /
- process mineralogy
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References
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YU Chunmei, WANG Ling, ZHANG Qing, MA Baozhong, FU Xin, WANG Chengyan. Process Mineralogy Study on Hard Lump Forming in Copper Smelting Flue of ISA Furnace[J]. Conservation and Utilization of Mineral Resources, 2021, 41(3): 43-48. doi: 10.13779/j.cnki.issn1001-0076.2021.03.006
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Figure 1.
Appearance of the sample
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Figure 2.
EDS analysis of the sample (a), water-soluble substance (b) and water leaching residue (c)
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Figure 3.
XRD patterns of the sample (1) and water leaching residue (2)
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Figure 4.
SEM morphology and EDS analysis of powder sample
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Figure 5.
SEM morphology of hard lump sample
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Figure 6.
SEM morphology and elements distribution of hard lump sample
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Figure 7.
SEM morphology and X-ray energy spectrometer of hard lump sample cemented by sulfide
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Figure 8.
Size distribution of hard cement in lump sample