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- Title
Experimental Study on Seleciive Leaching Separaiion and Recovery of Copper from ZincCopper Alloy Ash.
- Authors
WEN Shan; YI Juan; WU Xu
- Abstract
Zinc-copper alloy ash contains Cu, Zn, Al, Ni, Sn, Pb and other non-ferrous metals. In this paper, t he effective treatment of zmccopper ash in different particle size ranges ss realized by screening. The effects of sulfuric acid content, temperature, time, i iquid-soiid ratio, rotation speed, oxidant and roasting conditions on the selective eaching of different meta! were investigated. The resutts show that the zinccopper ash with partid size kss than 0. 15 mm ss caHned at 750 °C for 3 hours, and then leached at 85 °C, s uHunc acid content of 1. 2 g/g ash, iiquid-to-solid ratio of 5/1, sirring speed of 400 r/min, H202 0. 075 mL/g ash for 5 h. The removal rate of zinc ss 93. 40%, and the removal rate of copper ss 0. 23%. Compared with the initia1 copper ash, the ZnO n the copper ash after roasting and leaching ss greatly reduced. The leaching residue was mixed with copper slag with a particle size of 0. 15-0. 25 mm, roasted at 750 C for 4 hours, and then washed wI 2 mol/L suHurtc acid solution for 5 hours and washed wI water under the same condiions. The steps can remove a !arge number of impurtty metal e!ements inthe copper slag. The phase composition of the copper slag after pickling is mainly Cu, and the proportion of Cu elements reach 92. 52%.
- Subjects
NONFERROUS metals; LEACHING; COPPER slag; ROASTING (Metallurgy); ALLOYS; COPPER alloys; ACID solutions; SULFURIC acid; COPPER
- Publication
Nonferrous Metals Engineering, 2024, Vol 14, Issue 6, p76
- ISSN
2095-1744
- Publication type
Article
- DOI
10.3969/j.issn.2095-1744.2024.06.010