硝酸铵防结块及松散型硝酸铵的生产

对防止硝酸铵结块的几种途径进行了讨论,介绍了防结块剂的应用情况,重点介绍了五组份硝酸铵专用纺结块剂的特点及其应用情况。     

硝酸铵防结块剂技术及应用

介绍硝酸铵防结块剂的应用情况,应用结构表明,该防结块剂防硝酸铵结块效果好,并且无毒、使用方便、生产工艺简单。     

硝酸铵粒度对改性硝酸铵机械感度的影响

为使粉状改性铵油炸药在性能上真正代替铵锑炸药,了解硝酸铵粒度与炸药机械感度的关系,参照GJB772A-97标准对不同粒度的改性硝酸铵的机械感度进行了测定.研究表明,改性硝酸铵的粒度对其机械感度有明显影响,在一定粒度范围内,随着改性硝酸铵粒度的增大,机械感度有所增大;当粒度继续增大时,机械感度随着粒度的增大而下降.从理论上分析了改性硝酸铵粒度变化对机械感度影响的机理.     

含防爆剂农用硝酸铵的感度研究

实验在169℃左右加热硝酸铵到熔融状态,加入防爆剂,冷却到室温,得到含防爆剂的硝酸铵。测试其摩擦感度、5 s延滞期爆发点、静电火花感度以及配成铵油炸药后的撞击感度、雷管感度。结果表明,含防爆剂硝酸铵较普通硝酸铵撞击感度从88%降到24%,摩擦感度降为0%,5 s爆发延滞期从462℃增加到474℃,静电火花感度和雷管感度无明显变化。     

膨化硝酸铵的感度特征研究

膨化硝酸铵是近年来得到广泛使用的工业炸药氧化剂，本文对其撞击感度，摩擦感度，爆发点，火焰感度，静电火花感度等危险感度进行了测定，并对膨化硝酸铵进行了PSC实验，以及对雷管感度及冲击波感等实用感度进行了测定，研究表明，同普通硝酸铵相比，膨化硝酸铵具有较低的危险感度及良好的实用感度。     

硝酸铵成品颜色异常原因分析

近来公司在生产硝酸铵的过程中,间断出现粉红色硝酸铵。针对这种情况,从原材料、工艺过程及产品检验的角度进行了较广泛的分析,并提出了相应的建议,以期对相关生产有所借鉴和帮助。     

浅谈如何提高硝酸铵成品的产量

作者通过多年的生产实践，提出了提高硝酸铵产品质量和产量的有效方案和技改措施。     

硝酸铵成品颜色异常原因分析

近来公司在生产硝酸铵的过程中,间断出现粉红色硝酸铵。针对这种情况,从原材料、工艺过程及产品检验的角度进行了较广泛的分析,并提出了相应的建议,以期对相关生产有所借鉴和帮助。     

多孔粒状硝酸铵含量不确定度评定

论述了在多孔粒状硝酸铵含量(总氮含量)测定过程中不确定度产生的原因及计算方法.从而计算出多孔粒状硝酸铵含量(总氮含量)相对标准的扩展不确定度.     

影响造粒硝铵松散度原因及对策

10万t/a造粒硝铵使用添加剂后一举拓宽了市场,为公司多创了效益,使该产品由调剂产品变为公司主导产品,但产品中夏季仍会出现板结现象,影响了产品质量和信誉。     

硝酸铵膨化机理研究

简介了新型粉状工业炸药——岩石膨化硝铵炸药配方及特性,提出了硝酸铵膨化机理,讨论了空白膨化及表面活性剂膨化硝酸铵的影响因素及其结果。     

硝酸铵的吸湿性研究

介绍了硝酸铵的吸湿机理,防止硝酸铵吸湿的手段以及吸湿性和包覆效果的表征方法,并对防止硝酸铵吸湿的各种手段进行分析。     

膨化硝酸铵的制备技术

提出制备敏化硝酸铵的几个途径 ,重点阐述硝酸铵真空膨化改性结晶机制、膨化设备和膨化剂的作用 ,确定了优化的工艺条件。在表面活性剂作用下的真空改性结晶方法 ,是制造综合性能优良的“无梯”和“少梯”类膨化硝铵炸药的核心技术 ,也是当前的最佳技术途径。     

Volatile Emissions of Ammonium Nitrate under Flowing Conditions

Ammonium nitrate (AN) is an ionic solid commonly used as a fertilizer and in commercial blasting applications. Frequently, AN is mixed with a fuel and used in improvised explosives devices (IEDs). To characterize the low‐volatility components emanating from AN, a sample of AN was sealed inside a stainless steel chamber while a laminar flow of air swept the headspace vapor components into a water impinger or cold‐trap for pre‐concentration and subsequent analysis by ion chromatography (IC). Both collection methods were found to be 100 % efficient for collecting nitric acid vapor, whereas the collection efficiency for ammonia was dependent upon the collection method and, for the water impinging method, additionally upon the vapor concentration, humidity and flow rate. Cold‐trapping efficiency for ammonia was 4 %±2 % across all parameters studied. Water impinging was more efficient (20–70 %), but the efficiency varied according to each of the aforementioned variables. The characteristics of an AN vapor generated from a solid sample were found to vary as the sample approached equilibrium inside the chamber. Initially, large quantities of ammonia were observed, but as a steady state was achieved within the laminar flow and a dynamic equilibrium established, the ratio of ammonia to nitric acid in the effluent vapor dropped, although never becoming equimolar. The ratio was strongly dependent upon humidity.     

Small‐Scale Safety Testing of Ammonium Nitrate and Mixtures

Ammonium nitrate (AN), gunpowder (GP), and an ammonium nitrate gunpowder mixture (AN/GP) were studied for impact sensitivity by four laboratories using the drop hammer apparatus. Bruceton and Neyer methods were used as experimental protocols and for data reduction. The results are presented as 50 % probability of reaction (DH₅₀). For AN, the DH₅₀ values are widely varied among the participants, from sensitive to completely insensitive (limit of the equipment), with no real correlation among results. GP and the AN/GP mixture exhibited much more sensitivity overall and were in some cases within statistical values extrapolated from previous studies of RDX. The variability in results for the AN data is attributed to the difficulty in determining a positive reaction event for AN, as detailed by Neyer experiments and photography during positive reactions. Variability in results for the GP and AN/GP mixtures is attributed to equipment environment and detection criteria. This work was performed by the Integrated Data Collection Analysis (IDCA) program, a multi‐laboratory effort to standardize safety testing of improvised or homemade explosives funded by the Department of Homeland Security.     

膨化硝酸铵的膨化过程研究

讨论了硝酸铵膨化敏化过程中体系水分、温度的变化情况和微气泡、孔的形成过程,研究发现专用表面活性剂在硝酸铵膨化敏化改性过程中起降低表面张力和起发泡剂的作用。     

添加剂对硝酸铵热稳定性及爆炸性的影响

对硝酸铵及其混合物的热分解机理进行了总结.就添加物对硝酸铵热稳定性及爆炸性的影响研究的最新进展情况进行了系统介绍.     

高纯硝酸铈铵的合成与应用研究

研究了以碳酸铈和乙酸为主要原料，合成硝酸铈铵和乙酸钠的集成工艺。讨论了前驱体氢氧化铈的硝酸溶解性能、硝酸铈铵结晶母液的循环利用、结晶母液中铈的回收方法。从原料碳酸铈到最终产物硝酸铈铵，铈的总收率为95．61％。以硝酸铈铵为引发剂，引发了丙烯酸与壳聚糖的接枝共聚反应，接枝率为45．69％。     

硝酸铵氧化剂的表面改性及其吸湿性研究

提出了用硅烷偶联剂Si-K和高分子材料Polym-B对硝酸铵进行双层包覆的新思路;利用光电子能谱仪和扫描电子显微镜表征了包覆效果,结果表明Si-K和Polym-B能对硝酸铵粒子进行很好包覆,在其表面形成均匀而完整的包覆层.通过测量吸湿性和结块性的变化研究了改性效果,数据表明改性后的硝酸铵吸湿性降低了近50%,结块性显著降低.     

硝铵装置改产复肥生产技术路线的探讨

对硝铵改产PK复肥的原料路线，技术路线及生产方法进行分析探讨。