赤泥制备水玻璃工艺研究

硅酸盐通报 ›› 2020, Vol. 39 ›› Issue (12): 3913-3917.

赤泥制备水玻璃工艺研究

史国义¹, 潘爱芳¹, 马昱昭², 孙悦¹, 畅捷², 杨玲³, 段玉宇³

1.长安大学地球科学与资源学院,西安 710054;
2.西安建筑科技大学材料科学与工程学院,西安 710054;
3.陕西省地质调查实验中心,西安 710054

发布日期:2021-02-01
通讯作者: 潘爱芳,博士,教授。E-mail:panaifang@126.com;马昱昭,博士,讲师。E-mail:yuzhaoma@126.com
作者简介:史国义(1993—),男,硕士研究生。主要从事固废资源化方面的研究。E-mail:s19135826042@163.com
基金资助:
陕西省公益性基金(201919);陕西省重点研发计划(2020SF-361)

Study on Preparation of Sodium Silicate from Red Mud

SHI Guoyi¹, PAN Aifang¹, MA Yuzhao², SUN Yue¹, CHANG Jie², YANG Ling³, DUAN Yuyu³

1. School of Earth Science and Resources, Chang’an University, Xi’an 710054, China;
2. School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710054, China;
3. Shaanxi Geological Survey Experimental Center, Xi’an 710054, China

Published:2021-02-01

摘要/Abstract

摘要： 为了提取利用赤泥中的硅元素,实现赤泥的资源化,同时为水玻璃的制备寻找一种新原料。本文以中铝山西新材料有限公司两组分赤泥为研究对象,通过化学分析法、XRD对赤泥进行了化学组成及矿物组成分析。表明该赤泥中二氧化硅含量较高且都为非晶态,反应活性高,为制备水玻璃的理想硅源。对赤泥进行酸浸可得到纯度为92%的硅胶。硅胶湿法制备水玻璃最佳工艺参数为NaOH质量浓度15%,液固质量比3,体系温度95 ℃,反应时间为15 min。经实验验证,最佳参数下的二氧化硅溶出率可达91%,对该赤泥中硅的利用率达84.6%。该研究可为赤泥资源化和水玻璃原料选取提供新的思路和依据。

关键词: 赤泥, 二氧化硅, 硅胶, 湿法, 水玻璃

Abstract: In order to extract and utilize the silicon element in red mud, a new raw material was found for the preparation of sodium silicate. In this paper, the chemical composition and mineral composition of red mud of Chalco Shanxi New Materials Co., Ltd. were analyzed by chemical analysis and XRD. The results show that the red mud is an ideal silicon source for the preparation of sodium silicate, because of its high content of amorphous silica and high reactivity. Silica gel with purity of 92% is obtained by acid leaching red mud. The optimum technological parameters of sodium silicate prepared by silica gel wet method are NaOH mass concentration of 15%, liquid-solid mass ratio of 3, system temperature of 95 ℃, reaction time of 15 min. The dissolution rate of silica under the optimal parameters is 91%, and the utilization rate of silicon in the red mud is 84.6%. This study provides a new idea and basis for the resource recovery of red mud and raw material selection of sodium silicate.

Key words: red mud, silicon dioxide, silica gel, wet process, sodium silicate

中图分类号:

TQ170

史国义, 潘爱芳, 马昱昭, 孙悦, 畅捷, 杨玲, 段玉宇. 赤泥制备水玻璃工艺研究[J]. 硅酸盐通报, 2020, 39(12): 3913-3917.

SHI Guoyi, PAN Aifang, MA Yuzhao, SUN Yue, CHANG Jie, YANG Ling, DUAN Yuyu. Study on Preparation of Sodium Silicate from Red Mud[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2020, 39(12): 3913-3917.

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