Effect of Drying on Particle Size and Sensitivities of Nano hexahydro-l,3,5-trinitro-l,3,5-triazine

Nano hexahydro-l,3,5-trinitro-l,3,5-triazine （RDX） was prepared using a bi-directional rotation mill and dried under different conditions （liquid, temperature and drying）. It shows that the samples cake seriously and the particles grow up obviously by ordinary drying in different liquids at 70 ℃, which occurs again after vacuum drying. With the increase of temperature, the degrees of caking and aggregation are enhanced. Well dispersed sample maintaining constant particle size is extracted by supercritical drying, especially freeze drying. Furthermore, the me- chanical sensitivities of I-RDX, O-RDX and F-RDX, of which the average sizes are 88.03 μm, 15.32 μm and 0.16 μm, respectively, are evaluated. Compared with I-RDX, the friction, impact and shock sensitivities of O-RDX are slightly lower. However, the friction, impact and shock sensitivities of F-RDX are reduced by 30%, 99.0% and 59.9%, respectively.     

认知弹性理论对网络环境下专题教学的启示

文章简要回顾认知弹性理论,重点对其给网络专题教学带来的启示进行探讨,并试图建构用于网络环境专题教学中的随机进入教学模式.     

管井降水技术在多种含水介质基坑工程中的应用

结合蚌埠城市中心广场会展中心工程，介绍了管井降水技术在多种含水介质的复杂地质环境下的应用。     

相干干扰下无源测向系统方位测量误差模型

为了定量评估相干干扰对无源测向系统产生的干扰效果,推导了相干干扰情况下两种典型无源测向系统的方位测量误差。仿真分析表明:相干干扰下无源测向系统方位测量误差的变化趋势与常理是相符的。     

丁辛醇罐区尾气焚烧系统的应用及技术改造

中石油四川石化有限公司丁辛醇项目新建一套低压火炬作为其罐区尾气安全放空设施,新建低压火炬保证生产装置正常或事故排放时能够及时、安全、可靠地在低压火炬中排放燃烧,并满足国家现行的有关标准和环保要求。现对其构造、技术特点、流程作一简要叙述;在实际使用过程中还存在一些问题,本文对这些问题及其技术解决方法作一论述。     

锅炉点火系统故障分析与处理

我厂有两台循环流化床锅炉,各有一套独立的自动点火系统。两套点火系统均使用天然气作为燃料,自投用以来经历了无数次的点火,其过程中也出现了许多问题,本文将对其中的典型故障进行分析和探讨。     

细粒鲕状难选胶磷矿选别试验研究

本研究磷矿样主要为细粒鲕状胶磷矿,属于难选磷矿,通过擦洗试验、正浮选试验和反浮选试验,确定了反浮选试验流程是回收该磷矿的有效手段。在原矿品位为23.15%时,采用反浮选可以得到精矿品位为27.80%,回收率为76.85%的较好指标。