The low-grade vanadium-containing stone coal used in this experiment was collected from Wuxi Country, Chongqing City, China. The experiment focused on the vanadium recovery from roasted residue through optimizing the ...The low-grade vanadium-containing stone coal used in this experiment was collected from Wuxi Country, Chongqing City, China. The experiment focused on the vanadium recovery from roasted residue through optimizing the process conditions of an effective and environmentally-friendly technology, named calcified roasting-sulfuric acid leaching technology. By single-factor experiments and orthogonal experiments, the effects of roasting temperature, roasting time, sulfuric acid concentration and leaching time on the leaching ratio of vanadium were analyzed. The results showed that the leaching ratio of vanadium reached 85.5% under the proper technological conditions of roasting temperature=950℃, roasting time=4 h, 40% concentration of sulfuric acid and leaching time=6 h.展开更多
In order to improve leaching efficiency of vanadium from stone coal,the combination of blank roasting and bioleaching using Bacillus mucilaginosus(B.mucilaginosus)mutants was evaluated.The atmospheric and room tempera...In order to improve leaching efficiency of vanadium from stone coal,the combination of blank roasting and bioleaching using Bacillus mucilaginosus(B.mucilaginosus)mutants was evaluated.The atmospheric and room temperature plasma(ARTP)technique was used to generate B.mucilaginosus mutants.The results showed that a mutant B.mucilaginosus BM-50,after ARTP irradiation for 50 s,had the highest acid production.The total content of the organic acid produced by B.mucilaginosus BM-50 was nearly doubled compared with the wild strain after 2 days.After 20 days,vanadium leaching rate with B.mucilaginosus BM-50 reached 18.2%,which was improved compared with the original bacteria(15.3%).A pretreatment via blank roasting for stone coal further improved the vanadium dissolution by bioleaching,namely,68.3%vanadium was extracted,which was much higher than that without blank roasting.It is shown that bioleaching by bacterial mutants by ARTP irradiation combined with blank roasting has great potential for improving vanadium recovery from low-grade vanadium bearing stone coal.展开更多
基金the Scientific Research Foundation of State Key Lab.of Coal Mine Disaster Dynamics and Control(2011AD105827-MS201206)Scientific&Technologic Program for the Bureau of Land Resources and Housing Management of Chongqing
文摘The low-grade vanadium-containing stone coal used in this experiment was collected from Wuxi Country, Chongqing City, China. The experiment focused on the vanadium recovery from roasted residue through optimizing the process conditions of an effective and environmentally-friendly technology, named calcified roasting-sulfuric acid leaching technology. By single-factor experiments and orthogonal experiments, the effects of roasting temperature, roasting time, sulfuric acid concentration and leaching time on the leaching ratio of vanadium were analyzed. The results showed that the leaching ratio of vanadium reached 85.5% under the proper technological conditions of roasting temperature=950℃, roasting time=4 h, 40% concentration of sulfuric acid and leaching time=6 h.
基金Project(2015ZX07205003)supported by Major Science and Technology Program for Water Pollution Control and Treatment of China
文摘In order to improve leaching efficiency of vanadium from stone coal,the combination of blank roasting and bioleaching using Bacillus mucilaginosus(B.mucilaginosus)mutants was evaluated.The atmospheric and room temperature plasma(ARTP)technique was used to generate B.mucilaginosus mutants.The results showed that a mutant B.mucilaginosus BM-50,after ARTP irradiation for 50 s,had the highest acid production.The total content of the organic acid produced by B.mucilaginosus BM-50 was nearly doubled compared with the wild strain after 2 days.After 20 days,vanadium leaching rate with B.mucilaginosus BM-50 reached 18.2%,which was improved compared with the original bacteria(15.3%).A pretreatment via blank roasting for stone coal further improved the vanadium dissolution by bioleaching,namely,68.3%vanadium was extracted,which was much higher than that without blank roasting.It is shown that bioleaching by bacterial mutants by ARTP irradiation combined with blank roasting has great potential for improving vanadium recovery from low-grade vanadium bearing stone coal.
基金Project (2020YFC1909704) supported by the National Key Research and Development Program of ChinaProjects (N2301017,N2201001) supported by the Fundamental Research Funds for the Central Universities,ChinaProject (BGRIMM-KJSKL-2023-15) supported by the Open Foundation of State Key Laboratory of Mineral Processing,China。
