COPPER SMELTER SLAG LEACHING BY USING H2SO4 IN THE PRESENCE OF DICHROMATE
作者: Rashid K. NadirovLyazzat A. Mussapyrova
刊名: Journal of Chemical Technology and Metallurgy, 2019, Vol.54 (3)
来源数据库: University of Chemical Technology and Metallurgy
关键词: Copper smelter slagSulfuric acid leachingDichromate
原始语种摘要: The system H2SO4-K2Cr2O7 is examined for leaching copper, zinc and iron from the copper smelter slag. The presence of dichromate has a positive effect on the copper recovery, which reaches 68 % under the following conditions: 0.5 M K2Cr2O7 + 1 M H2SO4, solid-to-liquid ratio = 15 g: 1 L, 120 min, 298 K. The calculated values of Ea of Cu recovery amounts to 34.60 kJ/mol, that of Zn – to 43.96 kJ/mol, while that of Fe - to 44.33 kJ/mol. The recovery of zinc and iron decreases significantly with the presence of K2Cr2O7 and is only 4 % - 5 % under the conditions specified. This fact can be associated with the selective adsorption of dichromate ions on the surface of the minerals containing zinc and iron. It prevents the recovery of these metals into the solution. This circumstance can be used...
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关键词翻译
关键词翻译
  • dichromate 重铬酸盐
  • recovery 回收
  • leaching 淋滤
  • smelter 熔化工
  • conditions 条件式
  • values 价值观
  • ratio 
  • adsorption 吸附
  • solution 溶液
  • presence 存在