回转窑窑头密封装置的改造

介绍Φ4 5× 10 0m回转窑窑头密封装置的结构及先后两次对其进行的改造 ;改造后的密封装置结构简单 ,制作安装方便 ,密封效果好 ,使用寿命长     

直接还原铁回转窑密封装置改造及其国产化

天津钢管还原铁厂的回转窑密封原设计为气动甘油摩擦密封，其密封效果差，操作和维护费用高，增加了生产成本，采用美国Svedala公司的技术对两条回转窑和冷却筒的密封方式进行了改造，实践证明，效果很好。     

工厂供电升压改造实现节能降耗

承德建龙公司结合自身特点,在设备改造过程中,牢固树立节能意识,通过电网升压改造取得了良好的效果.     

同步电机励磁装置改造

介绍了高压同步电机励磁装置改造后新增特点和功能。     

电除尘器高压供电装置

本文介绍了山东铝业公司使用的电除尘供电装置ＧＧＡＪ０２Ｄ型高压硅整流器和ＤＪ─１型硅整流器的主要技术性能特点及使用情况。还介绍了电除尘器的两种新型供电装置及微机控制的原理。     

供电母线沟通风改造设计

供电母线在通行沟内运行时散发出热量,会影响供电效率。本文通过对白银郝家川变电所617#-618#供电母线沟通风系统改造设计,能更好的满足供电母线安全、有效的运行。     

连铸机振动装置的改造

为解决韶钢一钢厂4号连铸机振动装置故障多的问题，提出把全板簧振动装置改造成半板簧振动装置，使改造后连铸机的振动装置通用，统一备件，且节约费用。     

转炉炉体连接装置改造

唐钢二炼负厂转炉炉体与托圈的连接装置中改造过程中，借鉴了三点球面螺栓结构，法兰螺栓结构，卡板式结构的优点，较好地解决了炉体溜渣，炉体在托圈中固定，热膨胀及炉体散热等问题。     

Limestone calcination in a rotary kiln

An experimental study of the calcination of limestone has been carried out in a highly instrumented pilot-scale rotary kiln. Local gas, solids, and wall temperatures and pct calcination have been measured under a range of operating conditions to determine the influence of limestone type, feed rate, rotational speed, inclination angle, and particle size on calcination and heat flow in the kiln. Thus, it has been found that the local calcination is dependent primarily on the solids temperature and hence on heat transfer. Of the variables studied, the limestone feed rate has the strongest effect on the temperature and calcination fields, whereas inclination angle and rotational speed are relatively less important. The different limestones studied exhibited significant differences in heat-absorption capacity and calcination temperature which may be related to their radiative properties. Increasing particle size over a range of 0.75 to 3.5 mm resulted in an increase in both heat transfer to the bed and calcination.     

制氧保供系统的优化与技术改造

主要介绍了莱钢公司制氧设备现状和进行的设备技术改造和升级项目,对现有制氧保供系统进行了较大的优化和技术改造,以及改造后产生的效果,阐述了技术改造成果对提升制氧保供能力产生的影响。     

小直径回转窑的改进设计

介绍了小直径回转窑的结构及改进设计后的生产实践。经过改进,回转窑的使用寿命延长,检修费用大大降低,设备生产利用率显著提高。     

矿山电源质量问题及谐波治理

现代矿山大多采用电力电子技术,推动了电气传动的快速发展,同时也带来了许多负面效应,使矿山电源出现许多意想不到的故障。文中主要总结了几种矿山电源质量问题及其解决方法,对矿山安全供电,可以起到未雨绸缪的效果。     

热电厂工业净水系统改造

介绍了马钢热电总厂直流冷却水改循环冷却水的改造方案,改造措施的实施,降低了工业净水的耗量,取得了一定的经济效益、社会效益和环保效益。     

大型镍铁电炉供电系统研究

结合红土镍矿RKEF冶炼工艺生产负荷的特点以及电炉的运行特性,对相关企业的高压供电系统设计进行探讨,绘制了常用供配电系统主接线方案图,并完成主变压器的选择和供电系统设计.文中对RKEF冶炼企业供电系统的继电保护配置进行了分析,并提出推荐方案.     

转供电移交 利国利民利企

工矿企业承担转供电是带有普遍性的历史遗留问题，是企业办社会职能的表现，也是企业的一大社会负担。本文通过对企业实施转供电过程中存在问题的分析，结合本单位实施转供电移交工作所取得的实际经验及成效，总结出实施将转供电移交供电部门直接供电管理是利国利民利企的大事，必须全力做好此项工作。     

回转窑余热发电经济效益浅析

结合某公司预焙阳极生产中回转窑余热发电技术状况，本文重点介绍了余热发电技术的可行性、实际效果、经济效益和可推广性。     

Heat transfer from flames in a rotary kiln

Heat flow in the flame zone of a direct-fired rotary kiln has been modeled mathematically. The flame has been assumed to be cylindrical in shape, backmixed radially, and moving axially in plug flow. The length of the flame and the rate of entrainment of secondary air have been characterized by empirical equations reported in the literature. It has been shown that the axial component of radiation can be reasonably neglected since it is relatively small compared to the radial component. The resulting one-dimensional model is capable of predicting the axial temperature profiles of the flame and wall and the axial profiles of heat flux to the solids bed and refractory wall. The model has been employed to study the influence on heat flow to the bed of the following variables: fuel type (fuel oil, natural gas, producer gas), firing rate, temperature of secondary air, pct primary air, and oxygen enrichment. Of the three fuels, combustion of fuel oil gives the longest flame and the greatest heat input to the solids in the flame zone. Raising the secondary-air temperature increases the flame length significantly but has a small effect on the maximum flame temperature and heat flux to the solids. Increasing percent primary air decreases the flame length and increases the peak values of flame temperature and solids heat flux but reduces the quantity of heat received by the solids in the flame zone. Oxygen enrichment results in a shorter flame, higher maximum flame temperature, and increase in the heat transferred to the solids in the flame zone. Formerly Graduate Student, University of British Columbia     

SVC在首钢中板厂供电系统中的应用

基于首钢中板厂35kV变电站SVC供电系统,首先介绍了该厂的电源系统和设备负荷情况以及SVC系统容量的确定,然后介绍了SVC系统组成和技术特点。通过总结SVC实际运行情况以及效益分析,得出采用TCR型SVC对于消除轧机无功冲击效果明显,是一种投资少、见效快的无功补偿系统。