东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (3): 363-367.DOI: 10.12068/j.issn.1005-3026.2016.03.013

• 材料与冶金 • 上一篇    下一篇

钾长石焙烧熟料中二氧化硅的溶出

刘佳囡1, 申晓毅1, 张俊1, 翟玉春1, 2   

  1. (1. 东北大学 冶金学院, 辽宁 沈阳110819; 2. 东北大学 秦皇岛分校, 河北 秦皇岛066004)
  • 收稿日期:2014-12-29 修回日期:2014-12-29 出版日期:2016-03-15 发布日期:2016-03-07
  • 通讯作者: 刘佳囡
  • 作者简介:刘佳囡(1987-),女,辽宁抚顺人,东北大学博士研究生; 翟玉春(1946-),男,辽宁鞍山人,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(51204054).

Digestion of Silica from the Potash Feldspar Roasted Clinker

LIU Jia-nan1, SHEN Xiao-yi1, ZHANG Jun1, ZHAI Yu-chun1,2   

  1. 1.School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
  • Received:2014-12-29 Revised:2014-12-29 Online:2016-03-15 Published:2016-03-07
  • Contact: ZHAI Yu-chun
  • About author:-
  • Supported by:
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摘要: 以钾长石碱焙烧熟料为原料,研究熟料中二氧化硅的溶出规律.考察了溶出过程中溶出温度、溶出时间、搅拌强度、熟料粒度和NaOH溶液浓度对SiO2溶出率的影响.利用扫描电镜 (SEM) 和 X 射线衍射(XRD)分析仪对熟料和碱溶渣的物相结构和微观形貌进行了表征并分析了溶出过程.通过试验得到适合的溶出条件为:溶出温度95℃、溶出时间80min、搅拌强度400r/min、熟料粒度74~89μm、NaOH溶液浓度0.2mol/L.在此条件下,SiO2溶出率可达到99%.溶出后Na2SiO3进入溶液,K和Al在渣中富集,得到分离.

关键词: 钾长石, 熟料, 二氧化硅, 溶出, 优化条件

Abstract: The digestion of silica in roasted clinker of potash feldspar with Na2CO3 was studied. The influences of digestion temperature, digestion time, stirring intensity, clinker granularity and NaOH concentration on the digestion efficiency of SiO2 were analyzed. The mineralogical structure and microstructures of roasted clinker and residue by digestion were characterized and the process of digestion was analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD) analyzer. The appropriate digestion conditions were concluded as follows: digestion temperature 95℃, digestion time 80min , stirring intensity 400r/min, clinker granularity 74~89μm and NaOH concentration 0.2mol/L. Under the conditions, the digestion efficiency of SiO2 is up to 99%. Na2SiO3 is joined into solution and K, Al are enriched in residue through digestion, and then they are separated.

Key words: potash feldspar, clinker, silica, digestion, the appropriate conditions

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