微生物浸出法从石煤提钒尾渣中回收钒和铜的研究  

Recovery of Vanadium and Copper from Vanadium Tailings from Stone Coal by Microbial Leaching

作　　者：董颖博 赵钰 林海 潘翰林 崇诗佳 Dong Yingbo;Zhao Yu;Lin Hai;Pan Hanlin;Chong Shijia(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Typical Pollutants,Beijing 100083,China;State Key Laboratory of Science and Technology of Mineral Processing,Beijing 102628,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]工业典型污染物资源化处理北京市重点实验室,北京100083 [3]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《稀有金属》2022年第5期619-626,共8页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(51874018);矿物加工科学与技术国家重点实验室开放基金项目(BGRIMM-KJSKL-2019-16);中央高校基本科研业务费项目(FRF-TP-19-014B1)资助。

摘　　要：中国堆存的石煤提钒尾渣量高达数十亿吨,尾渣中含有钒、铜等多种金属,高效回收尾渣中有价金属既可以实现其资源化,同时防止尾渣污染周边环境。本文采用微生物浸出技术回收石煤提钒尾渣中有价金属V和Cu,重点研究了不同初始pH、溶氧量(以摇床转速表征)、黄铁矿添加量、浸出时间等不同因素对氧化亚铁硫杆菌(T.f菌)浸出尾渣中金属钒、铜的影响。结果表明,初始pH 2~4范围内对V,Cu浸出率影响不大,较高的摇床转速有利于V,Cu的浸出;在初始pH为2、摇床转速170 r·min^(-1)、黄铁矿添加量15 g·L^(-1)的条件下,T.f菌浸出尾渣10天后,V和Cu浸出率分别达到83.4%和87.8%,相比单独酸浸体系,V和Cu浸出率分别提高了32.6%和17.92%,说明T.f菌在浸出石煤提钒尾渣过程中起了关键作用。研究结果将为推动微生物技术在石煤提钒尾渣资源化的稳定应用进程提供指导。The grade of vanadium in stone coals is generally low,so the amount of vanadium tailings piled up from stone coal in China is up to billions of tons.At present,the comprehensive utilization rate of vanadium extraction tailings is very low,and there are some valuable metals in the tailings.The microbial leaching is an effective technology to remove metals in the tailings of vanadium extraction from stone coal.On the one hand,the heavy metal content of the tailings after microbial leaching is reduced,which improves the safety of tailings stacking or comprehensive utilization.On the other hand,the leaching solution produced after leaching contains a certain concentration of heavy metal ions,which can be recycled by hydrometallurgical technical means to maximize the value of the tailings.Therefore,efficient recovery of valuable metals in the tailings can not only realize its resource recovery,but also prevent the tailings from polluting the surroundings.The vanadium extraction tailing samples used in this paper contained various metals such as vanadium and copper.And the microbial leaching technology was used to recover the valuable metals V and Cu in the tailings of vanadium extraction from stone coal.The leaching strain was Thiobacillus ferrooxidans(T.f bacteria),which was isolated from the pit waste⁃water of a copper mine in Jiangxi,China,by the laboratory.During the experiment,the cryopreserved strains were inoculated into 9K medium for activation,and when cultured to the stable phase,the T.f bacteria were used as the test strain.The static bioleaching experiment was carried out in shake flasks,and 1 g stone coal vanadium tailings and 10%(v/v)T.f bacteria were added to a 250 ml Erlenmeyer flask containing 90 ml 9K medium.The shake flasks were kept shaking at(30±2)℃.During the bioleaching experiment,different leaching conditions were controlled,and the effects of different initial pH,dissolved oxygen(characterized by rotational speed),pyrite addition,leaching time and other factors on the leaching of metal va

关 键 词：石煤提钒尾渣 微生物浸出 氧化亚铁硫杆菌 浸出率 

分 类 号：TD926[矿业工程—选矿]