中南大学学报（自然科学版）2024，Vol.55Issue(4)：1281-1290,10.DOI:10.11817/j.issn.1672-7207.2024.04.003
苛碱体系低模数硅酸钠溶液的结构
Structure of low-modulus sodium silicate solution in alkali system
摘要
Abstract
The effect of silica mass concentration,modulus and time on the structure of low-modulus(m≤1)sodium silicate solution in alkali system was studied using infrared spectra,and the differences of the structure between sodium silicate solution and pre-desilication solution were compared.The results show that the structure of pre-desilication solution is similar to that of sodium silicate solution in alkali system.In sodium silicate solution(modulus m is 0.75-1.00,ρ(SiO2)≤20 g/L),the structures of silicate ion appear in two complex forms of Si—O cyclic and three elements cyclic silicate ions.However,the ionic structures of sodium silicate solution with modulus m≤0.5,30≤ρ(SiO2)≤50 g/L are simple in monomer and linear forms.The formation of sodium aluminosilicate hydrate is mainly consumed by monomer silicate ions,and the structure of pre-desilication solution with silica mass concentration of about 50 g/L is stable,which will not be affected by aluminate ions in solution.关键词
苛碱体系/纯硅酸钠溶液/预脱硅溶液/结构/红外光谱Key words
alkali system/sodium silicate solution/pre-desilication solution/structure/infrared spectra分类
矿业与冶金引用本文复制引用
连选,彭志宏,申雷霆,齐天贵,周秋生,李小斌,刘桂华..苛碱体系低模数硅酸钠溶液的结构[J].中南大学学报（自然科学版）,2024,55(4):1281-1290,10.基金项目
国家重点研发计划项目(2022YFC3900902)(Project(2022YFC3900902)supported by the National Key R&D Program of China) （2022YFC3900902）
