Effect of biological pretreatment on flotation recovery of pyrolusite

作     者：杨志超 冯雅丽 李浩然 王维大 滕青 Zhi-chao YANG;Ya-li FENG;Hao-ran LI;Wei-da WANG;Qing TENG

作者机构：北京科技大学土木与环境工程学院北京100083 中国科学院过程工程研究所生化工程国家重点实验室北京100190 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第5期

页      面：1571-1577页

核心收录：

学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Projects(21176026,21176242)supported by the National Natural Science Foundation of China Project(2012AA062401)supported bythe Hi-tech Research and Development Program of China 

主　　题：flotation pyrolusite quartz laurylamine 

摘      要：Bacillus mucilaginosus was used in pretreatment ofpyrolusite to facilitate the flotation removal of quartz from pyrolusite minerals. Quartz was activated by B. mucilaginosus, whereas pyrolusite was unaffected at pH 7 with laurylamine as collector. Flotation recovery of pyrolusite with B. mucilaginosus pretreatment is 73.62%, slightly lower than that of the process without biopretreament, namely 74.70%. The grade of concentrate of recovered pyrolusite is 19.44%, 2.18% higher than that of the recovered pyrolusite without B. mucilaginosus pretreatment （17.26%）. The results of FTIR and SEM showed that no bacteria were adsorbed on the surface of quartz or pyrolusite, indicating that the better selectivity and collectability of flotation resulted from bacterial byproducts. And interaction of bacterial byproducts such as extracellular bacterial polysaccharide, extracellular bacterial protein and acetic acid, on minerals were studied by FTIR and adsorption.