安钢3#高炉原料直送系统技术应用

主要介绍施耐德PLC及HMI监控软件在安钢3#高炉原料直送系统的自动化技术应用、系统特点等。     

高炉供料系统改造方案分析与研究

文章在3、4#高炉由530m3改造成580m3后,针对供料系统提出三种改造方案,并对三种方案进行了对比分析,文章对其进行了重点阐述。     

浅谈安钢2800m^3高炉工程人工挖孔桩施工应用实践

介绍了人工挖孔桩的施工工艺原理,总结了在安钢2800m’高炉工程施工过程中应用人工挖孔桩基础的实践经验及特殊情况的处理方法。     

安钢4~#23500m~3/h空分设备总承包项目顺利出氧

<正>2016年3月18日,安阳钢铁集团有限责任公司(以下简称:安钢)4#23500 m3/h空分设备生产的氧气首次并入系统管网,标志着4#23500 m3/h空分设备正式投产。4#23500 m3/h空分设备是安钢为了淘汰落后产能、实现装备升级、完善制氧设施配置、降低能源消耗及稳定系     

高炉冷却壁失效原因研究

本文针对安钢高炉冷却壁破损的形式、原因进行研究分析,探讨了冷却壁的结构、材质、加工与安装工艺对其寿命的影响。介绍了安钢高炉炉役后期冷却壁的维护生产实践。     

15000m~3/h制氧机仪控系统的几个改造

阐述了安钢 1 5 0 0 0m3/h制氧机仪控系统的几个改造情况 ,改造后解决了生产过程中存在的实际问题 ,保证了安钢 1 5 0 0 0m3/h制氧机的安装调试和正常运行     

变频器在高炉探尺上的应用

本文介绍了采用ABB变频器实现安钢炼铁厂高炉探尺自动控制系统的思路和方法,给出了系统的硬件设计原理图、主要参数设置及调试步骤和故障分析。使用结果表明该系统运行稳定可靠,很好的达到了生产工艺要求。     

1280m~3高炉控制系统研究与应用

本文主要介绍了1280m3高炉结构与组成,介绍了控制流程,研究开发了1280m3高炉控制系统。本自动控制系统可以实现各工序的自动运行,各部件、阀门的自动控制。经试运行,该系统运行稳定,为企业创造了良好生产条件。     

济钢1750m~3高炉均压放散阀与料罐衬板的优化改造

济钢第二炼铁厂三座1750m3高炉炉顶原有均压放散阀的结构存在缺陷,密封性不好,经常出现因放散阀关不严被迫倒系统影响高炉正常生产的现象;炉顶上、下料罐的耐磨问题也一直制约高炉的安全生产,严重时出现料罐磨穿洒料、高炉煤气外泄的现象,存在下料罐爆炸和周边人员煤气中毒的安全隐患。为了改变这种被动局面,该厂通过一系列的改造,消除了设备隐患,有效保障了高炉的安全生产。     

1880m~3高炉风口回旋区特征的研究

随着新中国的成立,我国钢铁工业的发展十分迅速,现在已经成为我国国民经济的重要支柱产业,并成为世界生产的第一大国。钢铁生产的高炉内的一大重要反应区域就是高炉风口回旋区,回旋区的形成以及反应的情况,将对高炉上部炉料的均衡下降、下部煤气的分布以及整个高炉内的传质转热过程产生直接的影响。因此,本文通过对1880m3高炉风口回旋区的形成进行分析,进一步对其特征进行分析。     

高温热凝结构爆破处理方法的探讨

某炼铁厂高炉在生产过程中产生炉瘤,且有厚度逐渐增厚、范围进一步扩大之势,造成高炉有效容积减少、炉况恶化,制约了高炉的生产能力,影响其正常生产。通过近年来对该公司高炉内部积瘤的爆破施工,总结了处理高温炉瘤的多种方法,并进行了对比,提出了同类工程施工可行的施工方案,为类似工程提供了借鉴。     

Removal of phosphate from aqueous solution with blast furnace slag

Blast furnace slag was used to remove phosphate from aqueous solutions. The influence of pH, temperature, agitation rate, and blast furnace slag dosage on phosphate removal was investigated by conducting a series of batch adsorption experiments. In addition, the yield and mechanisms of phosphate removal were explained on the basis of the results of X-ray spectroscopy, measurements of zeta potential of particles, specific surface area, and images of scanning electron microscopy (SEM) of the particles before and after adsorption. The specific surface area of the blast furnace slag was 0.4m(2)g(-1). The removal of phosphate predominantly has taken place by a precipitation mechanism and weak physical interactions between the surface of adsorbent and the metallic salts of phosphate. In this study, phosphate removal in excess of 99% was obtained, and it was concluded that blast furnace slag is an efficient adsorbent for the removal of phosphate from solution.     

伺服系统在高炉无料钟自动布料控制中的应用

文章针对在传统高炉无料钟自动布料控制中,采用普通电机控制效果不好,存在能源浪费等问题,将伺服系统应用于高炉无料钟自动布料控制中,确保料流变动和倾角变动时系统的稳定性,在某炼铁厂1^#580m^3高炉取得了较好的控制效果和经济效益。     

核主成分分析的高炉故障检测研究

由于高炉冶炼系统的复杂性,传统的故障检测方法在高炉故障检测中的应用效果不佳.同时,高炉冶炼过程中的数据具有明显的非线性特征,利用主成分分析(PCA)等线性多元统计方法也难以取得良好的故障检测效果.针对这种情况,提出了利用核主成分分析(KPCA)方法对高炉冶炼过程中的故障进行检测,以适应高炉的非线性特征,实现对高炉故障的快速检测.     

SIMULATION OF GAS FLOW IN BLAST FURNACE FOR DIFFERENT BURDEN DISTRIBUTION AND COHESIVE ZONE SHAPE

Blast furnace is a very complex physico-chemical process with countercurrent flow of gas and solid. Computation of gas flow through different regions of blast furnace can be considered as the first major step towards numerical simulation of the process. Gas velocity profile in blast furnace depends on the burden distribution and shape of the cohesive zone, which affect the overall thermal efficiency and utilization of reduction potential of the gas (CO/CO₂ratio). Nonuniform or high gas flow near the wall causes overheating of the wall, which leads to high rate of refractory erosion and heat loss. High gas flow through the central region, on the other hand, causes higher CO/CO₂ratio at the center, leading to reduction in chemical and thermal efficiency of the gas. Therefore, achieving an optimum gas flow by controlling the burden distribution and shape of the cohesive zone is very important for minimizing refractory loss, thermal and chemical efficiency of the process. Gas velocity through various zones of blast furnace is computed by solving vectorial Ergun's equation for flow through porous medium considering axi-symmetric condition. To incorporate the shape of blast furnace efficiently, one-dimensional stretching in radial direction or nonorthogonal body-fitted coordinate system is used by the standard (x,y)to (ξ,η)transformation method. This model can be used for optimizing burden distribution and developing gas velocity control systems for blast furnace.     

高炉矿渣微细粉的粉体特性研究

采用球磨机磨制了比表面积为211～930 m~2/kg的矿渣微细粉体,并对其粉体特性进行了研究,所测性能包括:自然堆积密度、振实密度、安息角、粉体单面剪切和粉体的受压应力-应变性能,并对实验数据进行了数学分析处理。结果表明:矿渣粉体是一种具有粘聚性的库仑粉体,其内摩擦系数和可压缩性高于一般的无机粉体在矿渣粉磨生产线的设计和生产过程中,应对矿渣粉磨时的粉体解聚、料仓的防拱和容量计算等采取相应的措施。     

Mechanical properties of dusts collected from blast furnace dust catchers and cast house dedusting filters

ABSTRACT

Dust samples from blast furnace dust catchers and cast house dedusting systems were investigated with respect to flowability-relevant parameters. The mass median diameter of the dusts was in the range of 140 to 210 µm for the dust catcher dusts and approximately 6 µm for the cast house dusts. Generally, the flowability of the dust catcher dusts was better compared to the flowability of the cast house dusts. The flowability categories suggested by the three flowability indicators—the angle of repose, Hausner ratio, and Carr’s compressibility—were good for the coarser dusts, while for the finer dusts the flowability was overestimated. For the blast furnace dusts, from the dust catcher a considerable variation in the bulk density was found, which can presumably be attributed to the remarkable difference in the carbon content of the dusts investigated.     

PIROGAS - a new process allowing diversification of energy sources for blast furnaces

The PIROGAS process consists in replacing, in part or in total, the hot blast blown through the blast furnace tuyeres by reducing gas heated to a temperature of about 2000°C. The heating or the overheating and, eventually, the production of the reducing gas, can be achieved directly in the plasma heater. Up to 80% of the coke required for a conventional blast furnace operation can be replaced by substitute fuels. The PIROGAS process makes it possible to optimize the ratio between fossil fuels and electric power consumption to achieve an economic optimum. Trials carried out on an experimental blast furnace have shown that an operation with co'~e consumption as low as 105 kg of coke/ton of hot metal can be easily attained. Furthermore, it appeared during these trials that the quality of the hot metal can be instantaneously modified by appropriate action on reducing gas temperature and composition. Thus, the control of the process becomes easier and more rapid. Trials carried out on a full size commercial blast furnace have confirmed that the plasma heater in no way disturbs the operation of the blast furnace and, reciprocally, the unavoidable fluctuations in blast furnace operation do not perturb the functioning of the plasma heater. Plasma heaters have a high thermal efficiency (80%) and their electrical behaviour is excellent (power factor 0.92; no harmonics).     

中钛型含钛高炉渣制微晶玻璃及其性能研究

以中钛型含钛高炉渣为主原料制备微晶玻璃,利用渣中的TiO2作晶核剂.采用差示扫描量热法(DSC)、X射线衍射(XRD)和扫描电子显微镜(SEM)等分析技术研究了含钛高炉渣用量的变化对基础玻璃晶化、微晶玻璃性能的影响.结果表明,渣中适量的TiO2对玻璃晶化有较好的促进作用.渣用量较低时制得的微晶玻璃的主晶相为硅灰石,但当渣用量超过70％时,主晶相发生变化,变为钙铝黄长石等长石类矿相.中钛型含钛高炉渣用量为63％左右时,制得的微晶玻璃晶相含量合适,性能最好.此时采用的热处理制度为:核化温度720℃,保温1h,晶化温度945℃,保温2h,制得的微晶玻璃抗弯强度为121.68MPa,显微硬度为7.81 GPa.     

Predicting the strength development of cements produced with different pozzolans by neural network and fuzzy logic

This study is based on the determination of optimum usage of pozzolans as supplementary cementing material for blended cement production. Blended cements were produced with natural zeolite (clinoptilolite), Eskişehir trass, Nevşehir trass, fly ash and ground granulated blast furnace slag at 10, 20, 30, 35, 40 and 45% replacement ratios. Experimental results were also obtained by building models according to artificial neural network and fuzzy logic systems. It is concluded that the strength development of cement mortars containing different pozzolans can be obtained according to neural network and fuzzy logic model test results without any experimental study.