东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (7): 1024-1028.DOI: 10.12068/j.issn.1005-3026.2015.07.024

• 资源与土木工程 • 上一篇    下一篇

鲕状赤铁矿悬浮焙烧的磁性研究

王儒1， 韩跃新1， 李艳军1， 张裕书2   

  1. (1.东北大学 资源与土木工程学院， 辽宁 沈阳110819； 2.中国地质科学院 矿产综合利用研究所， 四川 成都610041)
  • 收稿日期:2014-05-15 修回日期:2014-05-15 出版日期:2015-07-15 发布日期:2015-07-15
  • 通讯作者: 王儒
  • 作者简介:王儒(1987-)，男，山东菏泽人，东北大学博士研究生； 韩跃新(1961-)，男，内蒙古赤峰人，东北大学教授，博士生导师.
  • 基金资助:
    “十二五”国家科技支撑计划项目(2012BAB14B02)； 国土资源部地质调查项目(12120113087600).

Research on Magnetic Properties of Oolitic Hematite Roasted by Suspension Roasting Furnace

WANG Ru1， HAN Yue-xin1， LI Yan-jun1， ZHANG Yu-shu2   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China； 2. Institute of Multipurpose Utilization of Mineral Resources， Chinese Academy of Geological Sciences， Chengdu 610041， China.
  • Received:2014-05-15 Revised:2014-05-15 Online:2015-07-15 Published:2015-07-15
  • Contact: HAN Yue-xin
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摘要： 针对鄂西某鲕状赤铁矿进行悬浮焙烧研究，并采用振动样品磁强计、X射线衍射分析仪、穆斯堡尔谱仪分析还原温度、还原时间、氧化温度、颗粒粒度对焙烧物料磁性和物相组成的影响规律.结果表明:铁矿石经悬浮焙烧后磁性明显增强，且焙烧物料磁性与强磁性铁矿物的含量呈正比.当还原温度为550~650℃时，还原物料的磁化强度和比磁化率随还原温度的升高而升高，超过700℃后则随之降低.延长还原时间可提高还原物料的磁化强度和比磁化率.焙烧物料中γ-Fe2O3含量随氧化温度升高而增加，在氧化温度为350℃时物料中γ-Fe2O3的含量达到最大值.当焙烧物料颗粒粒度小于15μm时，颗粒的磁化强度和比磁化率随之降低，而剩磁和矫顽力则随之增加.

关键词: 鲕状赤铁矿, 悬浮焙烧, 穆斯堡尔谱, 磁化强度, 比磁化率

Abstract: Suspension roasting test result of oolitic hematite from west part of Hubei province was investigated. The effects of reduction temperature， reduction time， oxidation temperature， particle size on the magnetic properties and phase composition of reduced iron ore were investigated by using vibrating sample magnetometer， X-ray diffraction， Mssbauer spectrometer. The results show that magnetic properties of iron ore enhanced obviously after suspension roasting and directly proportional to the content of strong magnetic iron minerals. Both the magnetization intensity and magnetic susceptibility of reduced ore increased with increase of reduction temperature when reduction temperature range from 550℃ to 650℃. However， when reduction temperature rose to over 700℃， both the magnetization intensity and magnetic susceptibility decreased accordingly. The magnetization intensity and magnetic susceptibility of reduced ore increased with reduction time extending. The content of γ-Fe2O3 in roasted ore increased with the increase of oxidation temperature and reached the maximum value when oxidation temperature was at 350℃. When particle size is smaller than 15μm， the magnetization intensity and magnetic susceptibility of particle decreased with the decrease of particle size， while remenance and corecivity of particle increased correspondingly.

Key words: oolitic hematite, suspension roasting, Mssbauer spectrum, magnetization intensity, magnetic susceptibility

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