化工矿物与加工2025，Vol.54Issue(12)：1-7,7.DOI:10.16283/j.cnki.hgkwyjg.2025.12.001
超声改性三乙醇胺在生石膏超细磨过程中的作用机理
Mechanism of ultrasound-modified triethanolamine in the ultrafine grinding process of raw gypsum
刘禹涵 1雷大士 1彭祥玉 1王宇斌1
作者信息
- 1. 西安建筑科技大学 资源工程学院,陕西 西安 710055
- 折叠
摘要
Abstract
In the process of ultrafine grinding,organic grinding aids such as triethanolamine(TEA)could affect the dewatering efficiency of the material,while physical modification could ensure the optimization of grinding aid dosage and synergistic regulation of grinding efficiency.In this paper,ultrasonic-modified TEA was used to grind gypsum,and the mechanism of ultrasonic-modified TEA in the process of ultra-fine grinding of raw gypsum was explored.The TEA solution and ultra-fine grinding products were characterized by Fourier transform infrared spectroscopy and X-ray diffraction analysis.The results showed that when the ultrasonic modification time was 25 min,TEA could reduce the D90 of the ultra-fine grinding product of gypsum from 61.98 μm to 28.02 μm,and the specific surface area increase from 417.2 cm2/g to 1 980.6 cm2/g.Ultrasonic modification increase the proportion of alcohol hydroxyl group and free water in TEA solution by 7.81 and 23.09 percentage points,respectively.The hydration of free water with calcium ions on the surface of gypsum and the adsorption degree of alcohol hydroxyl group on the surface of gypsum are improved.The viscosity of raw gypsum slurry is reduced by 23.66 mPa·s,and the diffraction peak intensity of(020)crystal plane of ultrafine grinding product is obviously weakened,which finally strengthen the grinding effect of TEA on raw gypsum.关键词
超声改性/三乙醇胺/醇羟基/超细磨/晶体结构/自由水/生石膏Key words
ultrasonic modification/triethanolamine/alcohol hydroxyl/superfine grinding/crystal structure/free water/raw gypsum分类
矿业与冶金引用本文复制引用
刘禹涵,雷大士,彭祥玉,王宇斌..超声改性三乙醇胺在生石膏超细磨过程中的作用机理[J].化工矿物与加工,2025,54(12):1-7,7.
