Atmospheric curing of zinc sulfide concentrate by sulfuric acid below 300℃

  • ruixin Ma University of Science and Technology Beijing
  • fanlei Deng University of Science and Technology Beijing
  • guixiao Xu University of Science and Technology Beijing
  • wenwen Fan University of Science and Technology Beijing
  • shina Li Tianjin Research Institute for Water Transport Engineering, Ministry of Transport

Abstract


In an open-air condition, zinc sulfide concentrate from Yunnan province, P R China, was cured with sulfuric acid at different acid-to-ore ratio and heated to 220℃~260℃ for different time, then leaching the cured product. The effects of temperature, curing time, acid-to-ore ratio, sulfuric acid concentration on the leaching ratio of zinc (hZn) were studied. The results showed that hZn could reach as high as 98.23% under the optimized conditions of temperature 240℃, curing time 2.5 hours, acid-to-ore ratio 1.4:1 and sulfuric acid concentration 60wt%. The leaching residue ratio is 6% composed mainly of silicate. The kinetic results confirm the zinc concentrate accord with shrinking core model controlled by the interface chemical reaction with an apparent activation energy of 43.158 kJ/mol.

Published
2022/12/23
How to Cite
Ma, ruixin, Deng, fanlei, Xu, guixiao, Fan , wenwen, & Li, shina. (2022). Atmospheric curing of zinc sulfide concentrate by sulfuric acid below 300℃. Journal of Mining and Metallurgy, Section B: Metallurgy, 58(3), 345-353. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/36746
Issue
Vol. 58 No. 3 (2022)
Section
Original Scientific Paper

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