Vanadium recovery from stone coal through roasting and flotation  

焙烧-浮选富集石煤中的钒（英文）

作　　者：刘春[1] 张一敏[1,2,3] 包申旭[1,3] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]武汉科技大学资源与环境工程学院,武汉430081 [3]钒资源高效利用湖北省协同创新中心,武汉430070

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第1期197-203,共7页中国有色金属学报（英文版）

基　　金：Project(2015BAB03B05)supported by the National Key Technology R&D Program during the"12th Five-year Plan"Period,China;Project(51404177)supported by the National Natural Science Foundation of China

摘　　要：A new process for vanadium recovery from stone coal by roasting-flotation was investigated based on the mineralogy. The process comprised four key steps： decarburization, preferential grinding, desliming and flotation. In the decarburization stage, roasting at 550 ℃ effectively avoided the negative effect of the carbonaceous materials in raw ore and generation of free CaO from calcite decomposition during roasting. Through preferential grinding, the high acid-consuming minerals were enriched in the middle fractions, while mica was enriched in the fine and coarse fractions. Through flotation, the final concentrate can be obtained with V2O5 grade of 1.07% and recovery of 83.30%. Moreover, the vanadium leaching rate of the final concentrate increased 13.53% compared to that of the feed. The results reveal that the decarburization by roasting at 550 ℃ is feasible and has little negative impact on mica flotation, and vanadium recovery from stone coal is conducive to reducing handling quantity, acid consumption and production cost.在石煤工艺矿物学的基础上,采用焙烧-浮选新工艺富集石煤中的钒。新工艺包括焙烧脱碳、选择性磨矿、脱泥和浮选4个关键步骤。在焙烧脱碳过程中,550°C焙烧脱碳能有效避免原矿中的碳质物和焙烧中方解石分解生成游离CaO对浮选产生的不利影响。通过选择性磨矿,高耗酸性矿物在中间粒级富集,而云母在细粒级和粗粒级中富集。浮选得到的最终精矿V_2O_5的品位为1.07%,回收率为83.30%。此外,最终精矿的钒浸出率相比于脱碳样提高了13.53%。石煤原矿在550°C焙烧脱碳是可行的,对云母浮选几乎没有不利影响。通过对石煤中钒的浮选预富集,可以降低提钒的处理量、酸耗量和生产成本。

关 键 词：vanadium-bearing stone coal roasting decarburization MINERALOGY preferential grinding FLOTATION 

分 类 号：TF841.3[冶金工程—有色金属冶金]