赣州有色冶金化工厂电雷管等四种产品生产线扩大生产能力通过验收鉴定

受国防科工委的委托,江西省国防科工办于2001年10月22日至24日在赣州有色冶金化工厂主持召开了该厂工业电雷管、导爆管雷管、塑料导爆管及普通导爆索等四种产品的生产线扩大生产能力验收鉴定会.参加会议的有来自15个单位的18名代表,验收鉴定委员会由7名专家组成. 经赣州有色冶金化工厂申请,国防科工委同意该厂的普通导爆索年生产能力由原来的200万米扩大到500万米;工业电雷管年生产能力由原来的150万发扩大到300万发;导爆管雷管年生产能力由原来的300万发扩大到600万发;塑料导爆管年生产能力由原来的3000万米扩大到 5000万米.鉴定委员会及与会代表认真听取了有关报告.鉴定委员会审查了工厂提供的有关技术文件、图纸资料,对生产线进行了现场考察,并抽样检测了产品性能.认为工厂提供的资料齐全,文件编写符合要求,能正确指导生产;四条生产线工艺顺畅,布置合理,符合《 民用爆破器材工厂设计安全规范》要求;工装设备以及消防系统、防静电等安全设施基本满足安全生产要求;质量保证体系较为完善,计量器具、检测手段齐全可靠,生产工人操作熟练,能保证产品质量符合国家标准.经现场抽样检测,所检项目均达到相应的国家或行业标准要求.验收鉴定委员会同意工业电雷管、导爆管雷管、塑料导爆管及普通导爆索等四种产品的生产线扩大生产能力通过验收. (谢红卫)     

耐温高强度塑料导爆管和30段高精度毫秒导爆管雷管

文章介绍了用于大区微差爆破的30段毫秒导爆管雷管和耐高低温、抗腐蚀性能好的塑料导爆管的产品结构,各项性能测试数据,以及矿山应用实例。     

性能贮存可靠性评估及贮存寿命预测方法

在介绍贮存可靠性与条件贮存可靠性的基础上,针对一次性产品的性能贮存可靠性试验的特点,提出了性能贮存可靠性评估及贮存寿命预测的基本思路和方法。通过算例说明了本文提出的评估和预测思路的可行性与合理性,同时也分析了这种贮存可靠性评估和寿命预测方法对于一次性产品的适用范围。     

塑料导爆管起爆性能研究

本文通过实验技术揭示了塑料导爆管在点火过程中炸药所具有的点火延迟现象及其变化规律,据此提出影响起爆性能的主要因素。选择黑索今(RDX)炸药配用最佳比例的敏化剂作为导爆管用药;并可通过管腔条件的设计而获得具有高起爆性能的新型导爆管产品。     

高强度和高精度导爆管雷管的应用

高强度和高精度导爆管雷管是非电起爆系统实现"逐孔起爆"技术的关键器材.文章根据产品实际使用中的情况,对逐孔起爆技术的机理、爆破网络设计以及爆破质量等结果进行了分析,介绍了逐孔起爆辅助设计软件的开发情况,进一步阐明了这一新技术成果的推广应用前景.同时现场工业化试验表明,国产高精度导爆管雷管性能稳定,安全可靠,能够满足大规模现场应用的技术要求.     

影响导爆管传爆性能的若干因素探讨

1 引言导爆管是一种性能优良的新型起爆器材,问世后迅速推广应用。但我们对其起爆系统的可靠性与影响导爆管传爆性能因素的研究还很不够,不利于导爆管系统的合理使用,因此有必要全面展开导爆管传爆性能的研究。基于此,本文在利用高速摄影基础上对导爆管断药、弯曲、空洞、切缝和导爆管管壁强度进行了研究。     

导爆管的示踪剂溯源方法研究

为了能使导爆管具有良好的可溯源特性,研究了示踪剂在导爆管中的添加方法以及检测方法,通过改变示踪剂的组分及其添加量,得到含有不同种类示踪剂的导爆管,利用电感耦合等离子发射光谱对爆前和爆后样品中的示踪剂配比及含量进行研究,探讨了导爆管的装药均匀性、导爆管取样长度、导爆管取样位置对爆后测试结果的影响。结果表明,导爆管的装药均匀性及取样位置对示踪效果影响较小,长度为10cm的导爆管取样量可以保证检测结果的有效性,半定量设计配比法可以有效地解决导爆管的溯源问题。     

车载LNG气瓶绝热性能定期检测方法分析

车载LNG气瓶采用真空绝热技术实现LNG的长期贮存,达到节能减排,低温绝热性能是衡量产品综合性能的重要依据之一。目前,车载LNG气瓶的低温绝热性能在出厂前已经进行了检测,国家已经建立了相关测试标准和判别标准,规定了检测方法和评价依据,但使用过程中的绝热性能定期检测一直是行业内的短板,相关标准和法规还不完善,存在使用安全隐患。通过结合车载LNG气瓶的产业现状,分析了车载LNG气瓶定期检测现状,在此基础上提出了车载LNG气瓶绝热性能定期检测的检测流程、检测方法、判别依据及验证要求等。     

YL—11型导爆管

文中介绍了YL-11型塑料导爆管的结构、性能和垂直法生产工艺,该产品能满足矿山大区微差爆破及其混装车的要求。     

应用测量不确定度保证产品检测质量

测量不确定度被广泛应用于测量仪器的校准和检定,以及产品的检验和测试等领域,对于使用时间较长、技术指标临界、长期连续使用的测量仪器,不仅能够考核测量仪器的技术性能,而且有利于保证产品检测质量,在满足使用要求的前提下,通过评定测量仪器技术性能的可靠性,消除同类测量仪器的差异,提高测量仪器的利用率,从而保证产品检测质量的一致性.     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Synthesis of Alumina-Zirconia Nanocomposites by Solgel Process

Al₂O₃-ZrO₂ nanocomposites were developed starting with the solgel process. Composite alumina-zirconia nanopowders were synthesized from metallorganic precursors (Aluminium secondary butoxide and zirconium Iso propoxide) using the solgel process. The parameters affecting the synthesis—solvent, concentration of precursor, R/H ratio (i.e., dilution of water in solvent)—were varied as also the temperature and pH. BET and TEM were used to measure nanosize. Diffuse reflectance spectroscopy and also qualitative optical absorption led to identical particle size estimate. The variation of process parameters was used to study the effect and interdependence of process parameters. Artificial Neural Networks was used to rigorously analyze the process. Although this led to confirmation of interdependence of parameters, the presence of a single overwhelming solvent variable was also established. Then the optimal process was used to synthesize more nanopowder. To produce bulk nanocomposite the nanopowders were sintered by varying the temperature and time period. The sintered lithoids were probed with a vickers hardness tester to measure elastic modulus, hardness, and fracture toughness. The results showed high elastic modulus, modest hardness, and very high fracture toughness.     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.