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影响液混式膨化硝铵炸药性能的因素分析

     

摘要

The degree of vacuum in production process,concentration and temperature of ammonium nitrate solution and nozzle gap are key influencing factors for the expansion of liquid-mixed ammonium nitrate explosives.Combined with optimization of explosive production process,the effects of these key factors on the puffed performance were thoroughly studied.The results show that a vacuum below 0.086MPa leads to increased water content and hardening in the explosives ; the concentration of ammonium nitrate solution needs to be controlled in the range of 92.5% ~ 93.0% as a higher or lower concentration goes against puffing; the temperature of ammonium nitrate solution is determined as 120 ~ 128℃ since crystallization will happen at lower temperatures when the solution encounters the attachment surface while sticky materials will be generated at higher temperatures upon puffing; the favorable nozzle gap has a favorable value of 3.0 ~ 5.0 mm due to the appearance of fluffy extruded materials at smaller gap nozzle and increased oversized materials at larger gap nozzle.%液混式硝铵炸药生产过程中的真空度、硝铵溶液浓度、硝铵溶液温度及喷头间隙是影响其膨化效果的关键因素.文章结合生产工艺的优化,详细研究了这些因素对膨化效果的影响.研究结果表明,真空度低于0.086MPa,产品水分大,易结块;硝铵溶液浓度过高或过低都不利于膨化,一般控制在92.5%~ 93.0%最佳;硝铵溶液温度以120~128℃为宜,过低遇到附着面易产生结晶现象,过高膨化后物料发粘;喷头间隙以3.0~5.0mm为宜,过小膨化物料过于蓬松,过大导致筛上物增多.

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