窑外分解窑系统的优化及效果

本文分析了巢湖铁道水泥厂预分解窑系统存在的问题 ,提出了改进措施 ,总结了改造后取得的效果     

计算机集散控制系统在连续式加热炉中的应用

本文介绍了一种用于连续式加热炉的计算机集散系统设计方案及其实现方法。该系统具有可靠性高、参数整定方便、易于操作管理等优点。在冶金企业的使用表明，加热炉在该系统的控制下，可提高炉温控制精度，改善炉内燃烧状态，从而达到提高钢坯加热质量，减少环境污染，节能降耗的目的。     

含铬耐火材料的应用及前景

介绍了铬氧化物的性质及其在耐火材料中的应用,通过分析含铬耐火材料在高温炉中的应用现状,说明含铬耐火材料的重要性,其具有良好的发展前景.     

几种整流变压器和电炉变压器绕组起始参数计算

介绍了几种常用调压形式的整流变压器和电炉变压器各绕组起始参数的计算方法，分析了在不同分接位置各参数的变化规律。     

顺层石质路堑爆破开挖与防护技术

介绍台阶浅孔开挖与松动爆破相结合的顺层石质路堑爆破技术和自上而下，分段分层开挖，逐段清理、逐段防护、逐段成型的顺层石质路堑施工技术。     

纳米ZnO的形貌、光致发光性质及反应气浓度分布的研究

采用化学气相沉积的实验方法,以纯Zn粉为锌源,O_2为反应气,N_2为载气,在双管管式炉内制备了多脚结构的纳米ZnO,研究了载气流量对产物形貌和光致发光性能的影响;通过计算流体动力学软件FLUENT对实验条件下管式炉内O_2和Zn蒸汽的浓度分布进行了模拟。实验和模拟结果表明:随着N2流量的增大,O_2浓度减小,产物由钉状多脚结构向针状多脚结构转变;沉积位置处Zn蒸汽的浓度远大于O_2浓度,绿光发射峰主要是由ZnO纳米晶体氧空位引起的,沉积反应主要由O_2控制。     

Numerical Simulation of Response of SRC Columns Subjected to Blast Loading

The dynamic characteristics and failure modes of steel reinforced concrete (SRC) columns subjected to blast loading are complicated because of the transient stress wave in the SRC columns and the interaction between steel and concrete. This paper presents a numerical simulation of the response of SRC columns subjected to blast loading using hydrocode LS-DYNA. In the numerical model, a sophisticate concrete material model (the Concrete Damage Model) is employed with consideration of the strain rate effect and the damage accumulation. An erosion technique is adopted to model the spalling process of concrete. The possible failure modes of SRC columns are evaluated. It is observed that the failure of SRC columns subjected to blast load can generally be classified into three modes, namely, a direct failure in concrete body due to the stress wave, a transverse shear failure near the support sections due to the high shear force, and a flexural failure pertaining to large local and global deformation of the reinforcing steel.     

Numerical Calculation of Concrete Slab Response to Blast Loading

In the present paper, a dynamic plastic damage model for concrete has been employed to estimate responses of a reinforced concrete slab subjected to blast loading. The interaction between the blast wave and the concrete slab is considered in 3D simulation. In the first stage, the initial detonation and blast wave propagation is modelled in 2D simulation before the blast wave reaches the concrete slab, then the results obtained from 2D calculation are remapped to a 3D model. The calculated blast load is compared with that obtained from TM5-1300. Numerical results of the concrete slab response are compared with the explosive test carried out-in the Weapons System Division, Defence Science and Technology Organisation, Department of Defence, Australia.     

高炉不停风更换转炮减速机蜗轮的方法

文章概述了高炉电动泥炮的主要机构及其转炮的工作情况,分析了高炉不停风更换转炮减速机蜗轮的原因,并提出更换转炮减速机蜗轮的方法.     

马弗炉温度控制系统的改造

针对老式马弗炉温度控制精度差和无程序控温的缺点,对马弗炉温度控制系统进行改造,选择了程序控制仪表代替原位式控制器,用调压模块作为执行器,并更换热电偶以减少滞后时间,整定后所得的温度曲线证实,改造后的温度控制系统具有控温准确和多段程序控温功能。