一种用于固体推进剂样品无机组分含量测定的绿色预处理技术-《爆破器材》

文章信息/Info

Title:: A Green Pretreatment Technique for Determination of the Content of Inorganic Components in Solid Propellants

Author(s):: CHENG Qiuxia; XUE Xiaohui; LI Jiajia; ZHANG Hui; LIAN Jianbiao; Shanxi North Xing’an Chemical Industry Co., Ltd. (Shanxi Taiyuan, 030008)

摘要:: 利用密闭红外加热消解技术与化学法吸收酸烟相结合的绿色预处理方法，对需测定无机组分含量的固体推进剂样品进行了湿法分解预处理，并吸收反应产生的有害酸烟。结果表明：红外加热硝化时，以电炉 10%功率预热5 min后，以30%功率加热30 min，再以70%功率持续加热40 min，测得推进剂中燃烧催化剂的含量符合要求；当以电炉10%功率预热5 min后，以30%功率加热30 min，再以50%功率持续加热60 min，测得推进剂中炭黑的含量符合要求；用质量分数为30%的碱液进行两级吸收，实现了酸烟的零排放。该方法操作简单，准确度和精密度高，可用于固体推进剂无机组分含量测定过程中样品的预处理。

Abstract:: A green pretreatment method combining sealed infrared heating digestion technology with chemical absorption of acid fume was used to wet decompose and pretreat solid propellant samples that require determination of inorganic component content, and absorb harmful acid fume generated by the reaction. The results show that during infrared heating nitration, the content of combustion catalyst in the propellant meets the requirements by preheating for 5 min at 10% power of the electric furnace, heating for 30 min at 30% power, and then continuously heating for 40 min at 70% power. After preheating with an electric furnace at 10% power for 5 min, heating at 30% power for 30 min, and then continuously heating at 50% power for 60 min, the content of carbon black in the propellant meets the requirements. Zero emission of acid fume was achieved through two-stage absorption using alkaline solution with a mass fraction of 30%. The method is easy to operate, with high accuracy and precision, and can be used for sample pretreatment in the determination of inorganic component content in solid propellants.