高密度粉状铵梯炸药性能影响因素研究

高密度粉状铵梯炸药比普通2号岩石铵梯炸药密度大,爆速高,制造工艺复杂.以高温试验为手段,分析试验了组分、粒度配比及装药密度对高密度粉状铵梯炸药的性能影响结果.组分配比控制合适,高密度粉状铵梯炸药具有一定的耐热性能,木粉和复合燃料油相含量越高,高密度粉状铵梯炸药的耐热性能越差.     

稳定铵梯油炸药质量的探讨

为了改善工业粉状铵梯炸药生产过程中硝酸铵吸湿结块、有毒粉尘飞扬和环境污染等状况,四川省民爆器材归口部门自1987年起有计划地从长沙矿冶研究院引进了“岩石粉状铵梯油炸药”技术。铵梯油炸药的组成与2号岩石铵梯炸药相比,减少TNT 36％～54％,生产工艺也有较大变化,要保证铵梯油炸药的各项性能指标达到2号岩石粉状铵梯炸药的标准难度较大。我省多数厂开始一年     

几种粉状工业炸药的热化学计算与分析

文中对国内岩石粉状工业炸药几个主要品种：岩石膨化硝铵炸药,岩石粉状乳化炸药、４号岩石铵梯油炸药、２号岩石铵梯炸药和新２号岩石铵梯油的热化学性能进行了理论计算,并对计算结果进行了分析和比较。     

对3号煤矿粉状铵梯炸药结块原因分析及对策

文中从原材料水分、装药温度、半成品吸湿性与成品水分等方面，探讨了３号煤矿粉状铵梯炸药结块硬化的影响因素。     

4号岩石粉状铵梯油炸药结块原因分析及对策

文章从成品水分、装药温度,外界压力等方面,探讨了４号岩石粉状铵梯油炸药结块硬化的影响因素。     

产品信息——介绍我国民用爆破器材现有产品品种

(一)民用炸药类 1.粉状铵梯炸药系列该炸药系列是以粉状硝酸铵为主要成分,以梯恩梯为敏化剂,加入木粉等可燃剂所制成的混合炸药。共有以下几个型号: (1)用于露天爆破工程的有1号、2号露天粉状铵梯炸药。加抗水剂者称做露天抗水粉状铵梯炸药,适用于炮孔中有渗水且装药后短时间内起爆。     

关于解决2号岩石粉状铵梯炸药爆速问题的试验分析

关于解决２号岩石粉状铵梯炸药爆速问题的试验分析李志前淮北矿务局九一○厂（安徽，２３５０４２）１引言２＃岩石粉状铰梯炸药（以下简称２＃岩石）是工业粉状按梯炸药中的一个极为重要的品种。国家标准ＧＢ１２４３７－９０《工业粉状铵梯炸药》规定其爆速不得低于３２...     

一种降低铵梯炸药吸湿性的新技术

粉状铵锑炸药吸湿性很强，且吸湿后易结块，使爆轰感度降低，从而导致起爆困难甚至拒爆，研究采用粗制TNT代替粉状铵梯炸药中的军品TNT，用多孔粒状硝酸铵代替粉状硝酸铵，可使铵梯炸药的吸湿量下降17%左右。     

铵(梯)油类粉状炸药复合油相的研究

文章叙述了岩石粉状硝铵炸药向少梯,无梯炸药发展过程中,所采用的不同材料和配比的复合油相的不断改进,从而生产各种适应于能满足爆破工程需要的铵（梯）油类粉状炸药。     

影响2号岩石铵梯油炸药殉爆初探

文章从原材料水分、细度、复合油相的配制及混药温度等方面.探讨了2号岩石粉状铵梯油炸药殉爆性能的影响因素.     

Thermodynamic analysis of the regasification of LNG for the desalination of sea water

A net zero work system for the recovery of refrigeration available from LNG during regasification is described. The system consists of a heat engine operating between an LNG heat exchanger in which regasification takes place and a sea water heat exchanger in which sea water is cooled to 246 K. A portion of the work output from the heat engine is used to drive a heat pump operating between the atmosphere and another sea water heat exchanger in which a second sea water stream is cooled to 246 K. The remaining portion of the heat engine work is used to separate fresh water from the ice-slurry. Peak fresh water output is approximately 6.7 kg water/kg LNG.     

Water consumption estimates of the biodiesel process in the US

As a renewable alternative to petroleum diesel, biodiesel has been widely used in the US and the world. However, its potential impact on water resources has not been much evaluated. This study investigates water consumption from the biodiesel process, which includes three stages: soybean irrigation, soybean-to-soybean oil processing, and biodiesel manufacturing, at both national and state levels. Mass-based allocation is performed and water consumption at the three stages is obtained on the basis of million gallons per year and gallon water per gallon biodiesel (gal/gal). The normalized water consumption (water intensity) of the irrigation, oil processing, and biodiesel production stages are 61.78, 0.17, and 0.31 gal/gal, respectively. The resulting total normalized water consumption is 62.26 gal/gal for the biodiesel process which is much lower than those reported in existing literature. It is shown that water consumption from the three stages varies significantly from state to state, which warrants the necessity of state-level water consumption analysis for better decision making in water resources management. Water consumption in potentially water-stressed states is also investigated and results show that currently these states represent 1.6 % of total water consumption associated with biodiesel production, 0.46 % of soybean harvest, and 27.61 % of biodiesel production capacity in the US.     

Controlling the hydration of the skin though the application of occluding barrier creams

The skin is a barrier membrane that separates environments with profoundly different water contents. The barrier properties are assured by the outer layer of the skin, the stratum corneum (SC), which controls the transepidermal water loss. The SC acts as a responding membrane, since its hydration and permeability vary with the boundary condition, which is the activity of water at the outer surface of the skin. We show how this boundary condition can be changed by the application of a barrier cream that makes a film with a high resistance to the transport of water. We present a quantitative model that predicts hydration and water transport in SC that is covered by such a film. We also develop an experimental method for measuring the specific resistance to water transport of films made of occluding barrier creams. Finally, we combine the theoretical model with the measured properties of the barrier creams to predict how a film of cream changes the activity of water at the outer surface of the SC. Using the known variations of SC permeability and hydration with the water activity in its environment (i.e. the relative humidity), we can thus predict how a film of barrier cream changes SC hydration.     

超声波对水的过冷度影响的实验研究

对水的过冷度的研究在冰蓄冷和低温生物等许多领域都有重要意义。通过引起压力场的波动，超声波能够对水的过冷结冰过程产生影响。经对800kHz超声波作用下，水的过冷度进行实验研究，发现超声波能够大幅度降低水的过冷度。超声的这种作用与空化现象有关。     

热水供应小时变化系数的探讨

小时变化系数Kh是计算集中热水供应系统设计热水流量及耗热量的一个重要参数。从定义和数值两方面对国内外的小时变化系数进行了研究分析。指出科学地测定各类热水用户的用水情况对于形成和完善适合我国自己的各种热水供应定额、小时变化系数等基础数据体系具有深远的意义。     

控制聚合与沉淀协同作用改善高铁轨道板涂料用水玻璃性能

CaO可能对水玻璃酸碱度、Zeta电位产生影响,引起调控水玻璃中硅氧聚合体的聚合度和形成沉淀的协同作用,有望改善水玻璃的力学强度和耐水性。欲提高环保型高铁轨道板涂料用水玻璃的力学强度和耐水性,本实验拟采用CaO对水玻璃进行改性,并探索改性的相关机理。实验结果表明,CaO改性水玻璃力学强度提高77%,耐水性也明显提高。Zeta电位仪、pH计、X射线衍射仪、傅里叶红外光谱仪及固体核磁共振仪检测结果表明:添加CaO使水玻璃Zeta电位值、pH值均增大;在形成Ca²⁺的协同作用下,导致硅氧聚合体解聚、重组并限制聚合,主要以链状聚合体(Q²)存在。同时Ca²⁺与Q²结合形成耐水性较好、力学强度较高的CaO·xSiO₂·yH₂O(CSH)凝胶,而不是含大量Na⁺、耐水性差的硅氧聚合体。可以推断,CaO可产生控制聚合度和沉淀协同效应改善水玻璃性能,有望应用于高铁轨道板涂料用水玻璃。     

Application of the small-angle approximation to ocean water types

The small-angle approximation to the radiative transport equation is applied to particle suspensions that emulate ocean water. A particle size distribution is constructed from polystyrene and glass spheres with the best available data for particle size distributions in the ocean. A volume scattering function is calculated from the Mie theory for the particles in water and in oil. The refractive-index ratios of particles in water and particles in oil are 1.19 and 1.01, respectively. The ratio 1.19 is comparable to minerals and nonliving diatoms in ocean water, and the ratio 1.01 is comparable to the lower limit for microbes in water. The point-spread functions are measured as a function of optical thickness for both water and oil mixtures and compared with the point-spread functions generated from the small-angle approximation. Our results show that, under conditions that emulate ocean water, the small-angle approximation is valid only for small optical thicknesses. Specifically, the approximation is valid only for optical thicknesses less than 3.     

倒锥壳水塔控制爆破拆除实践

待拆除水塔位于江西省新余市闹市区内.该水塔全高约55 m,倒锥形水池容积300m3.根据水塔周边环境,在对水塔进行受力分析的基础上,采用在水塔倾倒中心线处开定向窗、爆破切口长度内两端开凿定位导向口等控制爆破技术,成功地对待拆除水塔实施了定向爆破拆除,为同类工程施工提供了宝贵的经验.     

环保型水性油墨稳定性、抗水性研究

水性油墨普遍存在稳定性、抗水性不理想等问题,严重阻碍其在包装印刷行业的发展和推广应用.主要采用不同混合配方,进行一系列的实验,对水性油墨的稳定性、抗水性进行了研究.结果表明:增稠剂及水性乳液能明显改善水墨的抗水性及稳定性.     

相变蓄热球对水箱热分层特性影响的实验研究

相变蓄热技术是提高太阳能利用效率的重要途径之一。本文基于三水合醋酸钠,搭建了一套相变蓄热水箱实验系统,在初始水温为80℃、进水温度为5℃的工况下,测试得到了水箱的热力学特性,并基于水箱内各温度点随无量纲时间的变化,采用填充效率和混合数分析法,分析了相变蓄热水箱的热分层特性。实验结果表明:当水箱温度为80℃时,普通水箱和相变蓄热水箱的能量分别为18.81 MJ和19.34 MJ。进口体积流量相同时,相变蓄热球越靠近水箱进口,水箱的热分层效果越好。普通水箱的热分层效果要强于相变蓄热球在第1、2和3层时,但弱于相变蓄热球在第4层时。当进口体积流量为9 L/min、t^*=1时,相变蓄热球在第1层和第4层时的填充效率分别为0.497和0.581,而普通水箱的填充效率为0.573。随着进水流量的增大,水箱内混合程度升高,斜温层厚度变大,水箱分层效果下降。当进口体积流量大于7 L/min且相变蓄热球位于底部时,相变蓄热水箱的热分层特性最佳。