废弃生物质破岩燃烧剂的性能研究

Research on the performance of rock breaking combustion agent with waste biomass

为探究废弃生物质在破岩燃烧剂中替代部分铝粉的可行性,对废弃生物质破岩燃烧剂进行了对外做功能力与热分解性能研究。采用弹道抛掷法进行对外做功能力测试,利用DTA-TG技术对废弃生物质破岩燃烧剂进行热分解特性分析。结果表明,当废弃花生壳替代铝粉用量为30%时,其对外做功能力达到52.6 J·g^(-1),较未替代前增加59%。随着温度的升高,生物质先发生热解,随后KNO_(3)与铝粉和废弃生物质发生反应,最后KNO_(3)与生物质热解产生的焦炭发生反应。废弃生物质的加入可提高破岩燃烧剂的做功能力,其中热值最高的花生壳使其做功能力提升最大,且更加钝感,起始分解温度增加6.7℃,既提高了破岩燃烧剂的安全性,又降低了成本。

To explore the feasibility of replacing part of the aluminum powder with waste biomass in rock-breaking combustion agents,the functional performance and thermal decomposition properties of waste biomass rock-breaking combustion agents were studied.The external functional performance was tested using the ballistic projection method,and the thermal decomposition characteristics of waste biomass rock-breaking combustion agents were analyzed using DTA-TG technology.When the amount of waste peanut shell powder replaced 30%of aluminum powder,its external functional performance reached 52.6 J·g^(-1),an increase of 59%compared to the original formula.With the increase of temperature,biomass in the biomass rock-breaking combustion agent first undergoes pyrolysis,followed by the reaction of KNO_(3)with aluminum powder and waste biomass,and finally the reaction of KNO_(3)with the coke produced by the pyrolysis of biomass.The addition of waste biomass can improve the functional performance of the rock-breaking combustion agent,and the highest calorific value of peanut shell has the greatest improvement in functional performance.Moreover,the addition of peanut shell makes it more insensitive,and the initial decomposition temperature increases by 6.7℃,which not only improves the safety of the rock-breaking combustion agent,but also reduces the cost.