(1. 中南民族大學(xué) 環(huán)境科學(xué)與工程研究所，武漢 430074；
2. 中南民族大學(xué) 化學(xué)與材料科學(xué)學(xué)院 催化材料科學(xué)國(guó)家民委-教育部共建重點(diǎn)實(shí)驗(yàn)室，武漢 430074)
摘 要: 以氨浸法從含砷石灰鐵鹽渣中回收銅，研究從該類(lèi)廢渣中回收銅的可行性、工藝條件和動(dòng)力學(xué)。結(jié)果表明：氨水和碳酸銨組成的浸取體系為適宜的浸取劑，當(dāng)總氨濃度為5 mol/L、與銨鹽濃度比為2:3、液固比為4:1時(shí)，銅的浸出率達(dá)到60.80%。動(dòng)力學(xué)研究表明：銅的浸出過(guò)程在288~328 K內(nèi)符合“未反應(yīng)核縮減”模型，浸出過(guò)程主要受內(nèi)擴(kuò)散步驟控制，經(jīng)擬合獲得浸出動(dòng)力學(xué)方程，浸出表觀(guān)活化能為41.12 kJ/mol。
關(guān)鍵字: 含砷石灰鐵鹽渣；氨浸法；浸出動(dòng)力學(xué)；銅
（1. Institute of Environment Engineering and Science, South Central University for Nationalities, Wuhan 430074, China;
2. Key Laboratory of Catalysis and Materials Science of State Ethnic Affairs Commission, Ministry of Education,
School of Chemistry and Materials Science, South Central University for Nationalities, Wuhan 430074, China）
Abstract:Copper was recovered from solid waste with arsenic by ammonia leaching method. The possibility of recovering copper, the optimal conditions and the kinetics from solid waste with arsenic by ammonia leaching method were investigated. The results show copper recovery rate achieve about 60.80% in a system composed of ammonia and ammonium carbonate with the total ammonia concentration of 5 mol/L, c(NH3):c(NH4+) of 2:3, L/S ratio of 4:1. Kinetics studies indicate that the leaching process follows the shrinking-core model in the temperature ranging from 288 K to 328 K, the leaching rate of copper is controlled by the inner diffusion of reactants during the leaching process, the leaching kinetics equation is established, and the apparent activation energy is 41.12 kJ/mol.
Key words: As-contained solid waste; ammonia leaching method; leaching kinetics; copper
