(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083；
2. 中國(guó)有色金屬工業(yè)清潔冶金工程研究中心，長(zhǎng)沙 410083)
摘 要: 采用低溫堿性熔煉處理銅陽(yáng)極泥(CAS)，研究熔煉浸出過(guò)程各有價(jià)金屬的分離富集行為。分析堿料比、熔煉溫度、熔煉時(shí)間、浸出溫度、浸出時(shí)間和液固比等6個(gè)因素對(duì)金屬浸出率的影響。結(jié)果表明：優(yōu)化條件為堿料比為0.5，熔煉溫度為600 ℃，熔煉時(shí)間為60 min，浸出溫度為70 ℃，浸出時(shí)間為60 min，液固比為12.5 mL/g。在此優(yōu)化條件下，Se和As 的浸出率分別達(dá)95.79%和96.83%，Cu、Pb、Sb和Te的浸出率分別為0.16%、3.36%、1.02%和0.05%，實(shí)現(xiàn)了銅陽(yáng)極泥中有價(jià)金屬的有效分離和富集。
關(guān)鍵字: 低溫堿性熔煉；銅陽(yáng)極泥；有價(jià)金屬；分離；富集
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Cleaner Metallurgical Engineering Research Center, Nonferrous Metal Industry of China, Changsha 410083, China）
Abstract:The valuable metals were separated from copper anode slime (CAS) by low-temperature alkaline smelting process. The effects of the mass ratio of NaOH, smelting temperature, smelting time, leaching temperature, leaching time and liquid-solid ratio on the leaching efficiency of metals were investigated. The results show that the optimum conditions are determined as follows: m(NaOH)/m(CAS) is 0.5, smelting temperature is 600 ℃, smelting time is 60 min, leaching temperature is 70 ℃, leaching time is 60 min and liquid-solid ratio is 12.5 mL/g. Under the optimum conditions, leaching efficiencies of Se and As are 95.79% and 96.83%, while the leaching efficiencies of Cu, Pb, Sb and Te are 0.16%, 3.36%, 1.02% and 0.05%, respectively, leading to the separation and enrichment of valuable metals from copper anode slime relatively.
Key words: low-temperature alkaline smelting; copper anode slime; valuable metal; separation; enrichment
