Study on direct acid leaching vanadium without grinding and roasting from clay vanadium ore in Hunan
A new technology of direct acid leaching vanadium without grinding and roasting was put forward, and the effects of leaching factors including dosage of sulfuric acid, type and dosage of assistant leaching agent, leaching time and temperature, liquid-solid ratio on the vanadium leaching rate were systematically investigated.The results show that vanadium leaching rate could be up to 92.58% under the optimal conditions of sulfuric acid dosage of 30%, MnO2 as assistant leaching agent and its dosage of 1.5%, leaching time of 6h, leaching temperature of 90℃, liquid-solid ratio of 1∶1, and the leaching performance is perfect.Due to leaving out the high costing grinding system and the complex roasting system, the new technology has advantages in shortening the process, decreasing the cost, avoiding pollution generated by roasting comparing with the traditional technologies, and it can meet the requirement of modem metallurgy very well.
clay vanadium ore direct acid leaching vanadium extraction leaching rate
HE Weia YE Guohua TONG Xiong
Faculty of Land Resources and Engineering, Kunming University of Science and Technology,Kunming 650093, China
国际会议
杭州
英文
882-886
2013-01-18（万方平台首次上网日期，不代表论文的发表时间）