邯钢纯燃高炉煤气联合循环电站工艺的改进

通过对邯钢燃气蒸汽联合循环电站的详细剖析,并以邯钢CCPP工艺为基础,探讨在钢铁公司中对烧结工序两种余热源与高炉二次能源综合利用的可行性;通过对双压三进口余热发电锅炉发明专利的引入,拟定了集成发电CCPP工艺初步设计改进方案,最后对方案进行了初步的计算与分析,其结果可为钢铁公司二次能源的高效集成利用提供参考。     

高炉鼓风机在线倒运技术应用

从高炉鼓风机在线倒运的控制方法、操作方式、安全运行等方面进行详细介绍,提出了高炉鼓风机在线倒运方式,替代了一直沿袭的离线倒运,该方式是目前高炉鼓风机操作方式上的重大突破,值得钢铁冶金行业推广应用。     

用热管技术提高高炉鼓风温度的局限性及对策探讨

本文分析了用热管技术回收高炉热风炉烟气余热,实现空气、煤气双预热,提高高炉鼓风温度的局限性,并据此提出了进一步提高鼓风温度的几种方案并加以探讨。     

高炉喷吹废旧塑料的研究与进展

通过对国内高喷吹废旧塑料实验研究进展介绍,结合国外高炉喷吹废旧塑料技术概况,对废旧塑料在高炉中的应用进行了可行性分析。     

高炉煤气燃烧发电的现状和展望

分析了普通高炉和全氧鼓风高炉的造气过程和高炉煤气利用现状,提出了氧气高炉－联合循环（OBF－CC）炼铁发电流程。     

节能新技术在线材加热炉上的应用

冶金企业面对日益激烈的市场竞争,除了在产品质量和档次上实现飞跃外,还要控制吨钢能耗,降低加工成本.文中介绍了南京钢铁联合有限公司高线厂利用高新技术改造步进梁式加热炉,采取措施落实各项节能管理制度,降低了加热炉的燃耗,实现节能降耗的经验.     

高炉煤气锅炉燃烧中氮氧化物污染物的控制

文章介绍了氮氧化物生成机理及高炉煤气锅炉燃烧中氮氧化物污染物的控制.通过对NOx生成机理的讨论,高炉煤气燃烧时主要产生的NOX为热力型NOX,采用多层燃烧器的布置,把燃烧器组设计成浓淡燃烧器, 从而降低NOX的生成,使锅炉NOX排放达标,使之成为一种环保型污染气体治理设备.     

TRT装置在新钢高炉系统的应用

介绍了TRT装置的系统结构、工作原理、常见故障的维护及在我公司高炉系统的实际应用情况。     

上海宝钢高炉煤气联合循环发电机组简介

介绍了由日本崎重工和ABB公司提供的上海宝钢烧高炉煤气的联合循环发电机组的基本情况。     

LF炉的生产与技术

本文介绍了我国自行设计和制造的大型精炼设备——LF(HB-40型)钢包精炼炉的运行简况。经过七年的工业运行,已累计精炼64万t钢。精炼钢种包括含氧量低于13PPm的优质轴承钢,各种中低碳合金钢和超低碳不锈钢等44种。而且也积累了一定的炉外精炼操作经验。     

出铁场除尘技术在首钢京唐5500m~3高炉除尘中的应用

高炉在开、堵铁口及出铁过程中产生大量的烟尘,采用岀铁场除尘技术治理首钢京唐5500m3高炉岀铁场一、二次烟尘,是极有效的节能减排技术措施。其方法是首先确定合理的抽风量,依据抽风量的大小在高炉岀铁场产尘点设置顶吸罩、侧吸罩、沟盖,将烟尘最大限度的密闭捕集后,通过除尘系统负压风机的抽吸作用,烟尘经阀门和管道,引到地面低压脉冲布袋除尘器系统中,净化后达标排放。     

Kinetic and experimental characterizations of biomass pyrolysis in granulated blast furnace slag

With the objective of abating the energy crisis and greenhouse gas emissions, biomass pyrolysis to recover waste heat from granulated blast furnace (BF) slag was investigated via thermogravimetric and continuous fixed-bed experiments. The results showed that the mass conversion of biomass pyrolysis increased with the increasing heating rate. At the same time, a higher gas yield and lower heating value (LHV) and concentrations of H₂ and CO were obtained with the increasing temperature. Granulated BF slag can promote the pyrolysis and reforming of biomass tar, increasing the gas yield and LHV and H₂ concentration. Thus, granulated BF slag not only provided heat for the pyrolysis reaction but also promoted the pyrolysis and reforming of biomass tar, which might block and corrode pipes in practical production. The shrinking core model (R2) selected using a two-step calculation method interpreted the biomass pyrolysis in granulated BF slag. The reaction activation energy ranged from 60.743 kJ/mol to 65.963 kJ/mol as the heating rate decreased from 40 K/min to 10 K/min.     

中频电炉打结复合炉衬新工艺

本文介绍了一催化剂厂对GW-0.15-2.5中频电炉炉衬打结工艺的改进,从而使炉衬寿命延长,同时也提高了被熔炼材料的质量。     

直接空冷系统优化及参数敏感性分析

按热力学和热经济学原理,给出了直接空冷系统的优化参数和优化目标函数,并对某600MW直接空冷机组进行优化设计分析,参考运行机组的数据计算出了优化结果。对相关变量进行了敏感性分析,所得曲线表明了选取的设计变量和所得优化结果的合理性,而两个经济性参数的敏感性分析表明电价Pe对优化结果影响较大,因此,电价Pe的定值必须合理。     

An evaluation on rice husks and pulverized coal blends using a drop tube furnace and a thermogravimetric analyzer for application to a blast furnace

To evaluate the potential of pulverized coals partially replaced by rice husks used in blast furnaces, thermal behavior of blends of rice husks and an anthracite coal before and after passing through a drop tube furnace (DTF) was investigated by using a thermogravimetry (TG). For the blends of the raw materials in the TG, fuel reaction with increasing temperature could be partitioned into three stages. When the rice husks were contained in the fuel, a double-peak distribution in the first stage was observed, as a consequence of thermal decompositions of hemicellulose, cellulose and lignin. A linear relationship between the char yield and the biomass blending ratio (BBR) developed, reflecting that synergistic effects in the pyrolytic processes were absent. This further reveals that the coal and the rice husks can be blended and consumed in blast furnaces in accordance with the requirement of volatile matter contained in the fuel. After the fuels underwent rapid heating (i.e. the DTF), a linear relationship from the thermogravimetric analyses of the unburned chars was not found. Therefore, the synergistic effects were observed and they could be described by second order polynomials. When the BBR was less than 50%, varying the ratio had a slight effect on the thermal behavior of the unburned chars. In addition, the thermal reactions of the feeding fuels and of the formed unburned chars behaved like a fingerprint.     

基于Profibus网的变频器在高炉物料厚度探测的应用

介绍了高炉物料厚度探测方法和变频器调节原理，以及基于Profibus-DP网的控制系统构成和组态。简述了西门子S7-300PLC与变频器通讯编程过程的PID调节配置方法。     

高炉BPRT同轴机组与传统TRT机组应用效果分析比较

高炉炼铁是钢铁生产的主要能源消耗工序之一。近年来发展起来的BPRT同轴机组可实现高炉鼓风和高炉煤气余压余能回收的双重作用,可避免能源进行2次转换时的损失,大大提高了能源利用效率;此外,BPRT同轴机组能够调节稳定高炉炉顶压力,实现高品质炼铁。研究主要介绍了BPRT同轴机组与传统TRT机组的组成和工艺流程的特点,重点介绍了BPRT同轴机组的结构设计及节能效果。通过工况数据分析得出,运行BPRT同轴机组的高炉比传统TRT机组节电43.8%,给企业带来可观的经济和环保收益。     

The characteristics of syngas production from bio-oil dry reforming utilizing the waste heat of granulated blast furnace slag

A two-stage utilization of the waste heat of granulated blast furnace slag (BFS) was proposed, and the characteristics of bio-oil dry reforming under different conditions were investigated. For the bio-oil dry reforming utilizing granulated BFS as the heat carrier, when the temperature was higher than 800 °C, changes in the characteristics as bio-oil conversion and lower heating value (LHV) were not pronounced in response to the increasing temperature. The bio-oil conversion reached its maximum value with a CO₂/C (molar ratio of CO₂ to carbon in bio-oil) of 0.85. When the liquid hourly space velocity (LHSV) was higher than 0.45 h^?1, the bio-oil conversion and LHV dropped quickly as the LHSV increased. At the optimal condition with a temperature of 800 °C, a CO₂/C of 0.85 and an LHSV of 0.45 h^?1, the bio-oil conversion and LHV reached 90.15% and 511.02 kJ per mole of bio-oil, respectively. Granulated BFS could be beneficial for the bio-oil dry reforming process. Combining biomass pyrolysis and bio-oil dry reforming, a feasible industry application utilizing the waste heat of granulated BFS was presented systematically.     

Numerical prediction on the erosion in the hearth of a blast furnace during tapping process

The erosion caused by mass transfer in hearth is the most important factor for determining blast furnace campaign life. To support a helpful insight information of mass transfer for the hearth of the No. 2 blast furnace at CSC (China Steel Corporation), a numerical model including the mass transfer of carbon in thermal convective flow from a blast furnace hearth has been developed during the steady tapping process (based on a uninterrupted tapping process assumption). The three dimensional Navier–Stokes equation combined with the transport equations of energy and species with conjugate heat transfer and physical dissolution source is solved by the finite control volume scheme subjected to the segregated iterate under propriety boundary conditions. The results showed the concentration distribution of carbon expressed in terms of mass flux for analyzing the erosion of carbon brick in the blast furnace hearth with the different conditions including the status of dead-man, production of liquid iron, carbon concentration at the inlet, and porosity distribution in coke zone during tapping process at steady state. The result is useful to mitigate the erosion caused by mass transfer, and prolong the life span of the blast furnace.