糊精氮化铅球形化工艺参数的研究

Research on Technological Parameters of Spherical Dextrin Lead Azide

通过起爆药在有机玻璃管壳中压药上浮试验和流散性测定,发现球形糊精氮化铅中粒径<45μm颗粒的含量增多,使药剂装药性能下降、流散性变差,压药容易上浮;频繁压爆、毫秒延期电雷管瞬爆是压药上浮所致。提出两项质量控制指标:药剂堆积密度≥2.00 g/cm3;粒径<45μm颗粒的质量分数≤20%。工艺参数:3%(质量分数)氮化钠溶液加入8%(质量分数)硝酸铅溶液,水药质量比301,工业酸性糊精质量分数(外加)5%,氮化钠溶液碱度0.080%,化合温度60℃。保持一定的加料速度和搅拌强度,能稳定生产出满足雷管装配需求的起爆药。

Through the charge-pressing floating test and fluxion property determination of initiating charge in organic glass shell, it is found that reduction of loading performance, bad fluxion property and easy floating of charge-pressing would occur with the increasing of mass fraction of particles with grain size less than 45μm in spherical dextrin lead azide. It is also found that charge-pressing floating will be caused by frequently burst pressure and instantaneous-explosion of MS delay electric detonator. Two quantity control indexes were proposed including bulk density≥ 2.00 g/cm3 , and mass frac- tion of particles with grain size less than 45 μm ≤20%. Preparation process is as follows： 3% （mass fraction） sodium nitrite solution is added into 8% （mass fraction） lead nitrate solution, the mass ratio of water and charge is 30 ： 1, addi- tional amount of industry acidity dextrin is 5% （mass fraction） , alkalinity of sodium nitride solution is 0.080%, and the certain feeding speed and stirring intensity are maintained at the temperature of 60℃. The manufactured initiating charge can meet the requirements of detonator assembly.