摘要
针对转炉钒渣钙化焙烧酸浸工艺中存在的钒转浸率低的问题,采用高能球磨对钒渣进行活化预处理,以期强化其提钒效果。采用激光粒度分析仪、BET比表面积测定仪和XRD对活化前后钒渣进行了粒度、比表面积及物相结构分析;采用浸出实验研究了机械活化对钙化焙烧和浸出的影响规律。结果表明:机械活化法增大了钒渣的比表面积,增加了晶格畸变与微观应力,使含钒物相充分解离,由此可改善钒渣钙化焙烧的动力学条件。在浸出20 min条件下,机械活化80 min可将钒浸出率提高10%,最佳焙烧温度降低100℃。
In order to account the fact that the extraction of vanadium from vanadium-bearing converter slag by calcification roasting-acid leaching process is limited,an attempt was exploited for improving the extraction of vanadium with high energy ball milling pretreatment.The particle size distribution,specific surface area and phase transformation of the vanadium slag before and after activation were investigated by laser diffraction particle size analyser,micro-pore physisorption analyser,and XRD,respectively.The effects of mechanical activation on the calcification roasting and leaching were also investigated.The results demonstrate that the mechanical activation significantly increases the specific surface area,lattice distortion,and microscopic stress of the vanadium slag,and reduces the particle size,thus improves the kinetic conditions of the calcification roasting.Under the condition of leaching for 20 min,the leaching efficiency of vanadium can be increased by 10%by mechanical activation for 80 min,and the optimal roasting temperature can be reduced by 100℃.
作者
黄青云
向俊一
裴贵尚
王鑫
吕学伟
HUANG Qing-yun;XIANG Jun-yi;PEI Gui-shang;WANG Xin;LüXue-wei(College of Materials and Metallurgical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Vanadium-titanium Metallurgy and Advanced Materials,Chongqing University,Chongqing 400044,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2020年第4期858-865,共8页
The Chinese Journal of Nonferrous Metals
基金
中国博士后科学基金资助项目(2018M640898)
国家自然科学基金青年科学基金资助项目(51404047)。
关键词
钒渣
机械活化
钙化焙烧
酸浸
浸出率
vanadium slag
mechanical activation
calcification roasting
acid leaching
leaching fraction
作者简介
通信作者:向俊一,助理研究员,博士;电话:023-65112631;E-mail:xiangjunyi126@126.com。
