爆破器材2025，Vol.54Issue(2)：29-35,43,8.DOI:10.3969/j.issn.1001-8352.2025.02.004
低温环境下卷装静态破碎剂的物理化学性能
Physical and Chemical Properties of Static Crushing Agents in Low Temperature Environments
摘要
Abstract
To reveal the influence of different calcination temperatures and constant temperature times on physical and chemical properties of calcium oxide in roll-packed static crushing agents in low-temperature environments,KRX-17B muffle furnace was used to prepare calcium oxide clinker under high-temperature vacuum calcination conditions.The micro-structure of the calcium oxide clinker was observed using a scanning electron microscope.The dynamic changes in the ex-pansion pressure of the crushing agent under low temperature conditions were tested by external tube method.The static crushing agent formula was optimized based on multi factor and multi-level orthogonal experiments.The optimal formula(mass fraction)for static crushing agents in low-temperature environments(-5 to20℃)is:75%calcium oxide,8%P.O 42.5 cement,6%sodium based bentonite,2%calcium chloride,2%gypsum,1%water reducer,and 6%fly ash.Low calcination temperature can lead to multiple pores and gaps in calcium oxide clinker,resulting in faster hydration reac-tion.Excessive calcination temperature will cause shrinkage of clinker pores and reduction of gaps,and the microstructure of the clinker will gradually evolve towards a dense state.Keeping the calcination temperature constant,the longer the con-stant temperature time,the lower the activity of calcium oxide clinker.When the ambient temperature increases from-5℃to 0℃,the increase in expansion pressure is relatively slow.When the ambient temperature increases from 0℃to 20℃,the peak increase in expansion pressure of the crushing agent is more significant.关键词
氧化钙/卷装静态破碎剂/高温真空煅烧/环境温度/物化性能Key words
calcium oxide/static crushing agent in rolls/high-temperature vacuum calcination/ambient tempera-ture/physical and chemical property分类
化学工程引用本文复制引用
刘玉法,齐文超,梁潇,冉秋硕,刘磊..低温环境下卷装静态破碎剂的物理化学性能[J].爆破器材,2025,54(2):29-35,43,8.基金项目
云南省重大科技专项(202202AG050014) （202202AG050014）
云南省教育厅科学研究基金(2020Y0088) （2020Y0088）
