(1. 武漢工程大學(xué) 化工與制藥學(xué)院，武漢 430073；
2. 清華大學(xué) 核能與新能源技術(shù)研究院 精細(xì)陶瓷北京市重點(diǎn)實(shí)驗(yàn)室，北京 100084)
摘 要: 以Na2SO3為還原劑從水鈷礦還原酸浸液中提取銅和鈷，研究了還原劑種類及用量、浸出溫度、硫酸濃度等因素對(duì)水鈷礦還原酸浸過程中有價(jià)金屬銅和鈷浸出率的影響。結(jié)果表明，Na2SO3是較適宜的還原劑；在還原劑用量為水鈷礦原礦質(zhì)量的10%、硫酸濃度為3 mol/L、浸出溫度為60 ℃、液固比為2׃1、浸出時(shí)間為60 min的條件下，銅和鈷的浸出率分別達(dá)99.06%和98.87%。并提出了“M5640萃銅→黃鈉鐵礬法除鐵→碳酸鈉除鋁→氟化鈉除鈣、鎂→蒸發(fā)結(jié)晶得鈷產(chǎn)品”的后續(xù)分離凈化流程，能有望應(yīng)用于水鈷礦及類似物料中有價(jià)金屬的提取與分離的工業(yè)生產(chǎn)。
關(guān)鍵字: 水鈷礦；還原酸浸；銅；鈷
with reductive acid leaching method
（1. School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China;
2. Beijing Key Lab of Fine Ceramics, Institute of Nuclear and New Energy Technology,
Tsinghua University, Beijing 100084, China）
Abstract:Copper and cobalt were leached from heterogenite in sulfuric acid using Na2SO3 as reducing agent, and the influences of the type and amount of reducing agent, leaching temperature, acid concentration, etc on leaching rates of copper and cobalt were investigated through single-factor experiments. The results show that the optimal conditions, at which the leaching efficiencies of copper and cobalt were 99.06% and 98.87%, were as follows: the dosage of Na2SO3 is 10% of the mass of heterogenite, and c(H2SO4)=3 mol/L, T=60 ℃, L/S ratio=2:1, t=60 min. The proposed flowsheet is Cu recovery by M5640→Fe removal by jarosite→Al removal by Na2CO3→Ca, Mg removal by NaF→evaporative crystallization valuable. This process flow can be applied in the extraction of metals from heterogenite and similar materials effectively in industry.
Key words: heterogenite; sulferic reductive acid leaching; copper; cobalt
