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硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (2): 527-533.

所属专题: 资源综合利用

• 资源综合利用 • 上一篇    下一篇

微波辐照煤系高岭土及其吸油性能

闫雷, 张涛, 黎佳全, 巩柯语, 苗洋, 高峰   

  1. 太原理工大学材料科学与工程学院,太原 030024
  • 收稿日期:2020-09-15 修回日期:2020-11-06 出版日期:2021-02-15 发布日期:2021-03-10
  • 通讯作者: 高 峰,博士,教授。E-mail:sxgaof@163.com;苗 洋,博士,副教授。E-mail:miaoyang198781@163.com
  • 作者简介:闫 雷(1995—),男,硕士研究生。主要从事无机粉体制备的研究。E-mail:1161039120@qq.com
  • 基金资助:
    山西省科技重大专项(20181101004);山西省重点研发计划(201903D321064)

Microwave Irradiated Coal Series Kaolin and Its Oil Absorption Performance

YAN Lei, ZHANG Tao, LI Jiaquan, GONG Keyu, MIAO Yang, GAO Feng   

  1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2020-09-15 Revised:2020-11-06 Online:2021-02-15 Published:2021-03-10

摘要: 以山西煤系高岭土为原料,在1 800 W的功率下对3 g煤系高岭土进行微波辐照,以此提高煤系高岭土的吸油值。利用扫描电镜、X射线衍射仪、红外光谱分析仪、比表面积分析仪等对处理前后样品的形貌和结构进行表征。结果表明,随微波辐照时间的增加,煤系高岭土的吸油值呈先增加后降低的趋势,且在处理时间为17.5 min(最高温度达到1 100 ℃)时吸油值最高,达到74.4 g/100 g,较高岭土原土吸油值提升了61%,此时煅烧高岭土的吸附平均孔径最大且生成了少量的莫来石。随着处理时间的延长,煅烧高岭土出现烧结,导致内部孔隙闭合,吸油值降低。煅烧高岭土的吸油值与其吸附平均孔径以及孔径分布有关,生成少量莫来石对吸油值的提高有促进作用。

关键词: 煤系高岭土, 微波, 吸油值, 吸附孔径

Abstract: As a raw material, Shanxi coal series kaolin (3 g) was processed under the microwave of 1800 W to increase the oil absorption value of coal series kaolin. The morphology and structure of kaolin before and after treatment were analyzed by means of scanning electron microscopy, X-ray diffractometer, infrared spectrum analyzer, and specific surface area analyzer. The results show that the oil absorption value of coal series kaolin increases first and then decreases with the increase of microwave treatment time. The oil absorption value reaches the highest (74.4 g/100 g) when the treatment time is 17.5 min (the highest temperature is 1 100 ℃), which is higher than the original kaolin by 61%. At this time, the adsorption average pore diameter of calcined kaolin is the largest and a small amount of mullite is produced. As the microwave process time increasing, the calcined kaolin sinters, which causes the closure of internal pores and the decrease of the oil absorption value. The oil absorption value of calcined kaolin is related to its adsorption average pore diameter and pore size distribution, and the production of a small amount of mullite can promote the increase of the oil absorption value.

Key words: coal series kaolin, microwave, oil absorption value, adsorption pore diameter

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