三乙醇胺系矿渣复合助磨剂的实验研究

Experimental Research on Slag Composite Grinding Aid of Triethanolamine

通过测试矿渣微粉筛余,比表面积和粒度分布,研究3种三乙醇胺系助磨剂对矿渣粉磨的作用效果,同时利用粒度粒形检测仪和扫描电镜分析了矿渣微粉的颗粒群形貌,并探讨了助磨剂对矿渣微粉活性指数及水泥-矿渣基胶凝材料标准稠度、凝结时间和安定性的影响。结果表明：三种助磨剂均能不同程度降低矿渣微粉筛余,提高其比表面积,提高幅度为5.3%-13.5%;掺入助磨剂后,矿渣微粉颗粒群的圆度降低,粗糙度与伸长度增加,粒度分布发生变化,0-20μm颗粒含量显著增加;水泥-矿渣基胶凝材料凝结时间缩短,标准稠度变化不大,安定性符合国家标准;助磨剂能显著提高矿渣微粉的活性指数,提升其质量等级。三种助磨剂以三乙醇胺复配无机盐的效果最好。

By testing the sieve,specific surface area and particle size distribution of slag powder,the effects of three kinds of triethanolamine grinding aids on grinding performance of slag were studied. The particles morphology of slag powder was analyzed by particle size and shape analyzer and SEM. The effects of the grinding aids on the activity index of slag powder and the standard consistency,setting time and stability of cement and slag cementitious material were discussed. The results show that three kinds of grinding aids can reduce the sieve and improve the specific surface area from 5. 3% to 13. 5%. After adding grinding aid,the roundness of particle group of slag power reduces,the roughness and elongation increase. The particle size distribution change with 0-20 μm grain content increasing significantly. The grinding aids make setting time of cement and slag cementitious material shorten and standard consistency changed little. The soundness is in line with national standards. Grinding aids can increase the activity index and quality grade of slag powder significantly. Triethanolamine combined with inorganic salt has the best effect in three kinds of grinding aids.