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Characterization of Copper Smelting Flue Dusts from a Bottom-Blowing Bath Smelting Furnace and a Flash Smelting Furnace

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Abstract

The smelting technology and flue dust treatment have an influence on the physical and chemical characteristics of flue dusts collected in copper smelting. We characterized flue dusts from a Bottom-Blowing Bath Smelting (BBS) process and from a Flash Smelting (FS) process by determining their comprehensive physical, chemical, and mineralogical characteristics. Annual flue dust generation data showed that the rate of the BBS process (2 to 3 pct) was clearly lower than that of FS process (5 to 6 pct). The results revealed that copper smelting flue dusts from the FS exhibited a larger entrainment of solids and a smaller particle size than the BBS. The crystallographic and chemical compositions of the samples indicated that the FS flue dusts have a higher degree of crystallinity than those of the BBS. Fe3O4, CuSO4 and PbSO4, Fe3O4, CuFe5O8 were the predominant crystalline phases in the FS and BBS flue dusts, respectively. In the FS and BBS flue dusts, amorphous multicomponent Cu-Zn-FeOx and Cu-Zn-S phases were formed, respectively. Mineralogical examinations and a stepwise chemical extraction confirmed that the majority of arsenic existed in amorphous form and mostly as pentavalent As5+ arsenate or As2O5 except that in BBS-ESPD.

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Acknowledgments

The authors gratefully acknowledge financial support from the National Key R&D Program of China (2017YFC0210405), the key project of National Natural Science Foundation of China (51634010), National Natural Science Foundation of China (51722407) and the “Double First Class” Funding Project of Central South University (31801-160170002).

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China

    Yujie Chen, Zongwen Zhao, Yanjie Liang, Bing Peng, Ning Peng & Hui Liu

  2. Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, P.O. Box 16100, 00076, Aalto, Finland

    Yujie Chen, Pekka Taskinen & Ari Jokilaakso

  3. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, Hunan, China

    Yanjie Liang, Bing Peng, Ning Peng & Hui Liu

  4. School of Material Science and Engineering, Central South University, Changsha, 410083, Hunan, China

    Ning Peng

  5. Shandong Yanggu Xiangguang Copper Co., Ltd, Liaocheng, 252327, Shandong, China

    Yanjie Liang & Songlin Zhou

  6. China Minmetals Co., Ltd, Changning, 412004, Hunan, China

    Hongchuan Ouyang

  7. Shandong Humon Smelting Co., Ltd, Yantai, 204109, Shandong, China

    Tao Chen

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  1. Yujie Chen
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Correspondence to Ning Peng or Hui Liu.

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Manuscript submitted December 13, 2019.

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Chen, Y., Zhao, Z., Taskinen, P. et al. Characterization of Copper Smelting Flue Dusts from a Bottom-Blowing Bath Smelting Furnace and a Flash Smelting Furnace. Metall Mater Trans B 51, 2596–2608 (2020). https://doi.org/10.1007/s11663-020-01907-8

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