润滑剂改性干水灭火材料的流动性能研究

Research on the flow performance of lubricant modified dry water fire extinguishing materials

干水作为一种粉体灭火材料,良好的流动性能对其发挥灭火作用以及未来规模化工业生产、储放均具有重要意义。选取滑石粉、硬脂酸镁和山嵛酸甘油酯3种不同润滑剂对干水进行改性,通过休止角、流出速度、微观结构和粒径分布等性能测试,研究了不同润滑剂及含量对干水灭火材料流动性能的影响。研究结果表明,1%山嵛酸甘油酯改性后的干水流动性最佳,平均休止角为28.889°,平均质量流速为11.90 g/s,较纯水干水提升24%。

As a powder fire extinguishing material,good flowability plays an important role in the extinguishing effect of dry water,as well as in its future large-scale industrial production and storage.The present study investigates the impact of different lubricants and their concentrations on the flow properties of dry water by modifying it with three selected lubricants,talc powder,magnesium stearate,and glyceryl behenate.The influence of different lubricants and their contents on the flow performance of dry water fire extinguishing materials was studied through performance tests such as angle of repose,mass velocity,microstructure,and particle size distribution.The results showed that dry water modified with 1%glyceryl behenate exhibited the best fluidity,with an average angle of repose of 28.889°and an average mass velocity of 11.90 g/s,which was 24%higher than that of pure dry water.