化工矿物与加工2024，Vol.53Issue(4)：8-15,8.DOI:10.16283/j.cnki.hgkwyjg.2024.04.002
低品位滑石提纯工艺试验研究
Experimental study on the purification process of low-grade talc
王璐 1仲剑初 1王洪志1
作者信息
- 1. 大连理工大学 化工学院,辽宁 大连 116024||辽宁省硼镁特种功能材料制备与应用技术工程实验室,辽宁 大连 116024
- 折叠
摘要
Abstract
The demand for low-grade talc is low in China,but high-grade talc is in short supply.In order to improve the utilization value of low-grade talc,high-grade talc was synthesized from low-grade talc and sodium silicate by com-bining chemical purification with hydrothermal synthesis.The acid dissolution of low-grade talc at different time was analyzed,and the best time of complete dissolution of gangue mineral(magnesite)was investigated.By examining the effects of factors such as pretreatment method,calcination,precursor formation condition,hydrothermal reaction tem-perature,time of low-grade talc on the crystallinity and purity of the synthesized product,the optimal purification process conditions were obtained:the magnesite in the low-grade talc was completely dissolved after acid treatment at 80℃for 2 h;At 60℃,the acid hydrolysis mixture was mixed with sodium silicate,and the pH of the system was adjusted to 7～8 for pre-reaction for 6 h to obtain the precursor,and the precursor reacted at 180℃under hydrother-mal conditions for 13 h,and finally prepared high-grade talc.The research results can provide reference for the high-value utilization of low-grade talc in China.关键词
低品位滑石/菱镁矿/化学提纯/水热合成/高品位滑石/预处理/酸解Key words
low-grade talc/magnesite/chemical purification/hydrothermal synthesis/high-grade talc/pretreat-ment/acid hydrolysis分类
矿业与冶金引用本文复制引用
王璐,仲剑初,王洪志..低品位滑石提纯工艺试验研究[J].化工矿物与加工,2024,53(4):8-15,8.
