Application of response surface methodology in optimization of bioleaching parameters for high-magnesium nickel sulfide ore

作     者：SUN Jian-zhi WU Biao CHEN Bo-wei WEN Jian-kang 孙建之;武彪;陈勃伟;温建康

作者机构：GRINM Resources and Environment Tech.Co.Ltd.Beijing 101407China GRIMAT Engineering Institute Co.Ltd.Beijing 101407China National Engineering Research Center for Environment-friendly Metallurgy in Producing Premium Non-ferrous MetalsBeijing 100088China GRINM Group Co.Ltd.Beijing 100088China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2022年第29卷第5期

页      面：1488-1499页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：Projects(51704028 51574036) supported by the National Natural Science Foundation of China 

主　　题：high-magnesium nickel sulfide ore bioleaching response surface methodology particle size acid consumption 

摘      要：The response surface methodology(RSM)was used to optimize the operating parameters during the bioleaching of Jinchuan high-magnesium nickel sulfide *** particle size,acid addition,pulp density and inoculation amount were chosen as the investigated *** maximize the leaching efficiency of nickel,copper,cobalt and minimize the dissolution of magnesium and iron ions,the model suggested a combination of optimal parameters of particles less than 0.074 mm being 72.11%,sulfuric acid addition being 300 kg/t,pulp density being 5%and inoculation amount being 12.88%.Under the conditions,the average results of three parallel experiments were 89.43%of nickel leaching efficiency,36.78%of copper leaching efficiency,84.07%of cobalt leaching efficiency,49.19%of magnesium leaching efficiency and 0.20 g/L of iron *** model indicated that the most significant factor in response of the leaching efficiency of valuable metal is the particle size,and the most significant factor in response to the leaching efficiency of harmful ions(Mg2+)is the amount of sulfuric acid *** according to the suggested models,no significance of the interaction effect between particle size and acid addition was *** the optimized parameters suggested by models,the valuable metals could be separated from harmful ions during the bioleaching process.