乳化炸药爆速影响因素研究

介绍了国内外对乳化炸药爆速的研究现状,针对其中存在的问题,根据乳化炸药的发展需要,进行了乳化炸药爆速的试验研究。通过对试样的爆速测试,研究了不同敏化方式、敏化剂不同含量及炸药的不同密度对乳化炸药爆速的影响,分析得出乳化炸药的爆速随其密度增加而增至最大后逐渐降低的结论。     

敏化方式对乳化炸药爆速的影响

通过建立的实验室乳化炸药制备工艺制备了几种常用敏化剂敏化的乳化炸药试样。研究了不同的敏化方式、敏化剂的不同含量及炸药的不同密度对乳化炸药爆速的影响。     

降低乳化炸药爆速的途径

文中讨论了影响乳化炸药速的因素。研究结果表明,密度调节剂可明显降低乳化炸药的爆速,可制成爆速在2000m/s以下的低爆速乳化炸药：密度调节剂在8％时,乳化炸药爆速最低。     

NL有机微球对乳化炸药的敏化研究

分析了国内外乳化炸药敏化剂的性能特点和存在的问题,介绍了NL有机微球作为乳化炸药新型敏化剂的技术特点。研究了NL有机微球的含量、敏化温度、混合方式对乳化炸药的密度调节能力和爆炸性能的影响规律,结果表明,当NL添加量为乳胶基质质量的0.35%时,并以1∶2比例同水混合形成浆液,于90～95℃敏化乳胶基质,具有优良的敏化效果,乳化炸药装药密度为1.16 g/cm3,爆速为5 350 m/s,殉爆距离为6 cm,贮存期可达1年。     

四种敏化方式对乳化炸药爆速的影响

对同一配方的乳化基质采取四种不同的敏化方式，然后测试它们的密度和爆速，比较各种敏化剂的优劣及敏化剂含量对爆速的影响，认为四种敏化剂对爆速的影响程度从强到弱依次为：化学发泡，玻璃微球，膨胀珍珠岩和泡沫。     

关于乳化炸药爆速异常的试验研究

爆速是检验乳化炸药质量的重要指标之一,要求乳化炸药的爆速在4200~5500之间,并无雷管感度,但在实际检测中,测得的爆速结果异常偏高或偏低,为此,采用BSZ-1单段爆速仪对乳化炸药爆速进行测试,试验结果表明:造成爆速异常的原因主要有2点,一是探针没有径向穿过PVC管,只插入炸药体中1.5 cm;二是PVC管内的炸药质量均匀性差。     

高性能空心玻璃微珠填充乳化炸药的研究

国内乳化炸药采用的密度调节剂多为膨胀珍珠岩和化学发泡剂,但使用膨胀珍珠岩的炸药密度不易控制,并受其粒度、强度和耐油性能的限制,导致爆轰性能降低。因此,重点研究了利用高性能空心玻璃微珠填充乳化炸药的各项性能。结果表明：高性能空心玻璃微珠可以作为炸药的稳定剂和敏化剂,同时也明显改善炸药的殉爆距离、猛度和爆速性能,微珠的填充量为4%。     

高性能空心玻璃微珠填充乳化炸药的研究

国内乳化炸药采用的密度调节剂多为膨胀珍珠岩和化学发泡剂,但使用膨胀珍珠岩的炸药密度不易控制,并受其粒度、强度和耐油性能的限制,导致爆轰性能降低。因此,重点研究了利用高性能空心玻璃微珠填充乳化炸药的各项性能。结果表明：高性能空心玻璃微珠可以作为炸药的稳定剂和敏化剂,同时也明显改善炸药的殉爆距离、猛度和爆速性能,微珠的填充量为4%。     

工业炸药爆轰参数理论计算

总结了关于爆轰产物状态方程的几种观点,通过计算几种工业炸药爆轰参数并与实验值作比较,其中运用多方方程*方法计算的爆速值作为炸药的理想爆速计算值DM。分析计算结果发现,乳化炸药的爆速计算值与实验值相对误差最小,得出乳化炸药的爆轰行为比较符合C-J模型,更接近于理想爆轰的结论。     

KYS-1乳化剂的研制

介绍了乳化剂的设计原理和KYS-1乳化炸药的制备过程,提出了乳化炸药爆速威力的测定方法,围绕用KYS．1乳化剂生产的乳化炸药爆速、威力、感度、保质期、抗水性能、密度、炸药传爆、抗冻性能等指标进行了分析。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。