东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (5): 663-667.DOI: 10.12068/j.issn.1005-3026.2019.05.011

• 材料与冶金 • 上一篇    下一篇

微波预处理对钒钛磁铁矿磨矿动力学的影响

王俊鹏， 姜涛， 刘亚静， 薛向欣   

  1. (东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2018-04-12 修回日期:2018-04-12 出版日期:2019-05-15 发布日期:2019-05-17
  • 通讯作者: 王俊鹏
  • 作者简介:王俊鹏(1988-)，男，辽宁沈阳人，东北大学博士研究生; 姜涛(1973-)，男，辽宁本溪人，东北大学教授，博士生导师; 薛向欣(1954-)，男，河北唐山人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51574082)； 国家自然科学基金云南联合基金重点资助项目(U15022273)； 中央高校基本科研业务费专项资金资助项目(N150202001，N172507012).

Effects of Microwave Pretreatment on the Grinding Kinetics of Vanadium Titano-Magnetite

WANG Jun-peng， JIANG Tao， LIU Ya-jing， XUE Xiang-xin   

  1. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2018-04-12 Revised:2018-04-12 Online:2019-05-15 Published:2019-05-17
  • Contact: JIANG Tao
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摘要： 利用磨矿动力学研究了微波处理前后不同粒级钒钛磁铁矿的破碎速率(S○1)及初始破碎分布函数(Bi,j)，并分析了磨矿产品的表面形貌及物相组成的变化.结果表明:微波处理前后钒钛磁铁矿均遵循一级磨矿动力学，微波处理后矿石的S○1值均高于未处理矿石，且增加的幅度随着矿石粒度的增加而增大.微波处理前后钒钛磁铁矿的Bi,j取决于入料粒度，微波处理后矿石的粒度分布函数γ值均小于未处理矿石;SEM分析表明:微波处理后磨矿产品有着更小的粒度尺寸和更粗糙的表面;XRD分析表明:球磨后，微波处理后的矿石有着更强的衍射峰和更多的脉石相，说明矿石的解离程度得到提高.

关键词: 微波预处理, 钒钛磁铁矿, 破碎速率, 初始粒度分布函数

Abstract: The specific rate of breakage(S○1)and primary breakage distribution(Bi,j)of untreated and microwave-treated vanadium titano-magnetite(VTM) with different particle size were investigated using grinding kinetics， and the variations of surface topography and phase composition of ground products were analyzed. The results show that the breakages of both untreated and microwave-treated VTM obey the first-order grinding kinetics. The S○1 of microwave-treated VTM is higher than that of untreated ore and the S1 increment increases with increasing particle size. The primary breakage distribution parameters(γ) are dependent upon the feed particle size. The γ value of Bi,j of microwave-treated VTM is less than that of untreated ore. The SEM analysis shows that the ground products have smaller particle size and rougher surface after microwave treatment. The XRD analysis shows that microwave-treated VTM has stronger diffraction peaks and larger amounts of gangue phases after ball mill， compared to those of untreated ore， which indicates that the degree of dissociation of ore is improved.

Key words: microwave pretreatment, vanadium titano-magnetite, specific rate of breakage, primary breakage distribution function

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