中南大学学报（自然科学版）2011，Vol.42Issue(1)：7-10,4.
强化氧化对石煤钙化焙烧提钒的影响
Effect of oxidation on vanadium extraction from stone coal with calcified roasting
摘要
Abstract
The calcified roasting condition for vanadium extraction from stone coal was studied. Under the condition of 950℃, roasting 3 h, CaCO3 addition 6％ (mass fraction), the subsequent vanadium leaching efficiency of about 63％ can be obtained. On the base of the same condition, effect of air sparging and MnO2 addition on vanadium extraction was investigated. The reason why oxidation can improve vanadium leaching was investigated through phase and valence state of vanadium analysis. Results show that vanadium leaching efficiency of 69％ can be obtained with air sparging speed of 0.48 L/h and 68％ with MnO2 addition of 3％. It is found that oxidation is effective to destroy the ore structure and increase the percentage of V5+ in calcine, and more calcium vanadate compounds is generated, which easily responds to acid leaching.关键词
钙化焙烧/钒/石煤/氧化分类
矿业与冶金引用本文复制引用
李昌林,周向阳,王辉,张太康,李劫,欧星,江小舵..强化氧化对石煤钙化焙烧提钒的影响[J].中南大学学报（自然科学版）,2011,42(1):7-10,4.基金项目
国家自然科学基金资助项目(50974136) （50974136）
中南大学大学生创新性实验项目(LD09155) （LD09155）
湖南省研究生科研创薪项目(CX2009B037) （CX2009B037）
