东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (1): 51-56.DOI: 10.12068/j.issn.1005-3026.2017.01.011

• 材料与冶金 • 上一篇    下一篇

碱熔融焙烧SiO2和Zn2SiO4反应过程分析

申晓毅1,2， 贾超航1,2， 李豪1,2， 武康龙1,2   

  1. (1.东北大学 冶金学院， 辽宁 沈阳 110819； 2 .辽宁省冶金传感器及技术重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2016-02-11 修回日期:2016-02-11 出版日期:2017-01-15 发布日期:2017-01-13
  • 通讯作者: 申晓毅
  • 作者简介:申晓毅(1980-)，男，河北邢台人，东北大学副教授.
  • 基金资助:
    国家自然科学基金资助项目(51204054); 中央高校基本科研业务费专项资金资助项目(N150204009); 东北大学创新创业训练计划项目(151056).

Reaction Process Analysis of SiO2 and Zn2SiO4 Roasting with Molten NaOH

SHEN Xiao-yi1,2， JIA Chao-hang1,2， LI Hao1,2， WU Kang-long1,2   

  1. 1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. Liaoning Key Laboratory for Metallurgical Sensor & Technology， Shenyang 110819， China.
  • Received:2016-02-11 Revised:2016-02-11 Online:2017-01-15 Published:2017-01-13
  • Contact: SHEN Xiao-yi
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摘要： 以自制SiO2和分析纯Zn2SiO4为研究对象，NaOH为反应介质，考察了反应温度、物料配比和反应时间对硅提取率的影响.碱熔融焙烧SiO2的合适反应条件:反应温度450℃，NaOH与SiO2物质的量比2.4∶1，反应时间60min.二氧化硅与NaOH反应先生成Na2SiO3，随温度升高逐步转化为Na4SiO4.碱熔融焙烧Zn2SiO4的合适反应条件为反应温度500℃，NaOH与Zn2SiO4物质的量比20∶1，反应时间150min.Zn2SiO4与NaOH反应生成Na2ZnSiO4和Na2ZnO2，在350℃硅氧四面体反应得到Na2SiO3，随升温转化为Na4SiO4.

关键词: 氧化锌矿, 二氧化硅, 硅酸锌, 碱熔融焙烧, 反应过程

Abstract: Employing homemade SiO2 and analytic Zn2SiO4 as raw materials and NaOH as reaction medium， the influences of reaction temperature， molar ratio of NaOH to SiO2 and reaction time on the extraction ratio of silica were investigated. The appropriate reaction conditions were obtained as reaction temperature of 450℃， molar ratio of NaOH to SiO2 of 2.4∶1 and reaction time of 60min. Silica reacted with NaOH to form Na2SiO3 at first and then was transformed into Na4SiO4 along with temperature rising. The appropriate reaction conditions of Zn2SiO4 roasting were reaction temperature of 500℃， molar ratio of NaOH to Zn2SiO4 of 20∶1 and reaction time of 150min. Na2ZnSiO4 and Na2ZnO2 were formed when Zn2SiO4 reacted with NaOH. Silicon oxygen tetrahedron reacted with NaOH to form Na2SiO3 when the roasting temperature reached 350℃， and then Na2SiO3 was transformed into Na4SiO4.

Key words: zinc oxide ore, SiO2, Zn2SiO4, molten NaOH roasting, reaction process

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