本钢7号高炉操作制度的改进

7号高炉适时调整操作制度,优化高炉操作,采取"大α角、大矿角"布料,通过稳定焦炭平台、中心加焦保证了中心气流的发展,实现大批重生产,提高了煤气利用和冶炼强度,降低了燃料比,实现了节耗、增产的目的。     

钒钛矿高炉冶炼低燃料比操作实践

德钢2号钒钛矿冶炼高炉通过调整送风制度、缩小进风面积、提高鼓风动能,为提高煤气利用率、降低燃料比打下了良好基础。积极摸索合理布料制度、稳定气流、提高煤气利用率,创造了单月煤气利用率40%、燃料比597 kg/t的良好成绩。减少炉内漏水,降低不必要的燃料消耗,促进了炉况稳定顺行。加强日常管理和操作,采用精细化管理为燃料比的继续降低提供了有力支撑。德钢2号高炉采取的一系列有效措施降低燃料比,使高炉稳定顺行,为进一步降本增效提供了实践经验。     

五矿营钢1号高炉低品质矿高煤比攻关实践

文章对五矿营钢1号高炉在低品质矿冶炼条件下高煤比攻关进行了总结分析。针对低品质铁矿冶金性能差、品位较低、脉石成分含量高、尤其是Al2O3含量较高的铁矿石,改善入炉原料条件,合理匹配高炉操作制度和参数,强化生产管理,使得高炉3月煤比突破180 kg/t,4月开始煤比实现190 kg/t。期间炉况稳定顺行,入炉焦比降低74 kg/t,成功解决了高铝烧结矿冶炼、大渣量高煤比冶炼等关键技术,实现了低品位下相对较低的燃料消耗,多项技术经济指标实现创新。     

沙钢5800m~3高炉提高煤比操作实践

从2012年底至2013年初,沙钢5 800 m3高炉在焦炭质量稳定、吹透中心、稳定边缘的布料制度下,通过下部调剂成功实现了煤比从170 kg/t升至190 kg/t甚至212 kg/t,焦比从338 kg/t降低到303 kg/t,燃料比也从519 kg/t下降到501 kg/t。对这段时间的高炉炉尘进行岩相显微分析,根据焦粉和未燃煤粉不同的结构形态,结合化学成分分析全碳量定量给出炉尘中未燃煤粉量、焦粉量的变化。结果表明:通过调节风量、鼓风湿度及富氧等下部调剂手段适当提高氧过剩系数、风口回旋区深度以及理论燃烧温度可改善煤粉在风口前端的燃烧效率,使得炉顶未燃煤粉量降低;同时,通过下部调剂使得煤气在炉内的停留时间适当延长可为提高煤比创造空间,并改善煤气利用率;降低渣比也有利于煤比的提高。     

本钢7号高炉炉况强化实践

本钢7号高炉采用中心加焦的布料模式，边缘过重导致产量和燃耗水平不佳，通过轻负荷、开边缘、减中心和提产量四步调整，经过一个月的炉况强化，高炉压量关系逐步改善，有效提高了煤气利用率水平，缓解了压量关系，鼓风动能大幅度提升，经调整后高炉参数稳定，炉温合适，壁体温度均匀、渣皮稳定，产量稳步提升至6850 t/d以上，焦比下降至370 kg/t，燃料比下降至525 kg/t，实现了产量的提升和能耗的降低，达到了预期的调整目标。     

鞍钢2号高炉高利用系数生产实践

对鞍钢2号3 200 m~3高炉低燃料比高利用系数进行了生产实践总结。通过提高焦炭质量,改进造渣制度,采取高风温、高富氧和高顶压等操作,并控制合理的鼓风动能和送风比和加强炉前管理等措施,使鞍钢2号高炉的燃料比长期稳定在500 kg/t以下、焦比低于300kg/t。2015年以后该高炉利用系数保持在2.3 t/(m~3·d)以上。     

本钢7号高炉布料矩阵对煤气利用率影响实践

高炉布料矩阵对高炉顺行和煤气利用率的提高具有重要作用。本钢7号高炉以前采用的布料矩阵是中心加焦布料模式,通过中心透气性较好的"焦柱"使边缘区气流横向穿过中间区到达中心,增强中间区矿物与煤气流的接触面积,但是实际生产中煤气利用率差。通过对本钢7号高炉布料矩阵的调整,对比分析调整前后顶温、壁体温度和煤气利用率等因素的变化,总结出适合本钢现有原燃料条件的最佳布料矩阵——采用中心加焦结合平台漏斗布料方法使通过中间区煤气流增加,本钢7号高炉煤气利用率提高2%,燃料比降低15 kg/t。     

本钢2850m~3高炉降低焦比的生产实践

对本钢七号高炉降低焦比的实践经验进行了总结。认为原燃料条件的改善、合理的炉型、优化布料矩阵及大批重、合理的送风制度、高风温、高富氧,以及各项制度的合理匹配是本钢七号高炉降低焦比的主要经验。由于七号高炉率先使用大批重煤气利用率好,炉况稳定顺行,焦比降低,煤比提高,各项技术经济指标达到国内3000m3级高炉先进水平。     

本钢六号高炉强化冶炼实践

对本钢六号高炉(2850m3)强化冶炼实践的过程进行了总结。通过采取精料、提高和稳定炉温、加大矿批重降低燃料比、优化布料矩阵使煤气流合理分布、提高风温、出净渣铁、降低慢风率和休风率等措施,使炉况长期保持稳定顺行,实现了高产、低耗的目标。     

小高炉炼铁降低焦比的实践

结合安龙的炼铁高炉实际生产，对安龙高炉进行了一系列攻关．如富氧大喷吹相结合,提高精料水平，提高风温。在原有单纯喷吹无烟煤的基础上，改进制粉工艺，实现了烟煤无烟煤混喷吹。2006年的上半年与2004年相比，焦比降低了135kg／t，煤比提高了68kg/t。     

Blast Furnace Operations With Injected Coal at Weirton

Coal has been used as an auxiliary blast furnace fuel on the Weirton No. 3 blast furnace. Serious tuyere failure problems have been encountered, and they must be overcome before coal injection will receive widespread application. Coal has been injected into the No. 3 blast furnace at rates up to 15% of total fuel requirement. If operating practice differences are neglected, the coal to coke replacement ratio at the 10% coal injection rate was 0.94 and at 15% coal injection rate was 1.19.     

高炉内炉料运动的数值模拟

通过二维冷态模型和数值模型研究了高炉内的炉料运动规律。研究表明,通常边缘小粒焦和中心焦都能按一定的轨迹运行,不与周围的炉料混杂,说明高炉边缘加入小粒焦能在炉墙处形成一较稳定的隔离层,既可抑制边缘气流、降低炉墙热负荷,又可防止炉墙结厚和结瘤。软熔带附近炉料的流线在考虑矿石软熔收缩的情况下向中心侧移动,对上部块料带的炉料下降速度影响不大,而下部炉料下降速度则有所减小。     

Solid Fuel Injection at Weirton

Coal has been injected into No. 4 blast furnace at Weirton at rates up to 15% of the total furnace fuel requirements. The coal-to-coke replacement ratio has been approximately 1 lb of coal per 1 lb of replaced coke. Additional tests are scheduled in which oxygen enrichment of the hot blast will be used and higher injection rates will be tried.     

MATHEMATICAL MODEL OF BLAST FURNACE BURDENING AND PREDICTION OF ITS COKE SAVING EFFECT

本文采用最优设计理论,研究了低燃料比的高炉配料模型、高炉节焦回归方程和节焦预测计算程序,并由此预示高炉炼铁低燃料比、对应低燃料比的配料方案和供应热风炉的焦炉煤气量,以及高炉煤气达到的风温水平.既能为高炉炼铁选取低燃料比的配料方案提供计算模型,又能用电子计算机预测高炉炼铁的炉料结构编制计算程序.     

Blast Furnace Fuel Oil Injection

Tests conducted by Dominion Foundries & Steel Co. in conjunction with Esso Research have shown that heavy fuel oil is a satisfactory fuel for replacing coke in the blast furnace; furthermore, fuel oil injection adds a new tool for the control of furnace operation.     

A Survey of the Sulphur Problem Through The Various Operations in the Steel Plant

A perspective is presented of the steel plant sulphur distribution and elimination problem from coal to liquid steel ready for teeming, giving distributions of sulphur over a range of coke sulphur content, and some methods of sulphur control, in the blast furnace, external desulphurization between blast furnace and open hearth, distribution between fuel, slag, and metal, and methods and limitations of control of sulphur in the open hearth furnace.     

Thoughts on lead blast-furnace smelting

On the basis of limited experimental work conducted at the Port Pirie smelter, it would appear that, by increasing the specific surface of sinter, and possibly that of coke as well, a marked increase in the rate and degree of sinter reduction in the furnace shaft can be achieved. Fusion-point tests have shown that this increased reduction means a much higher sinter fusion point and narrower plastic zone, while the more efficient utilization of coke in the furnace is inherent in the intensification of reduction by the provision of a more reactive sinter surface. Investigations aimed at increasing the ability to operate the blast furnace with a higher lead tenor of sinter reducing fuel cost proportionately, and at eliminating the loss in reduction potential in coke entering the furnace, as shown by the presence of appreciable proportions of CO in the top gases, are reported. Several lines for future investigations that could result in improved smelting methods are proposed.     

高炉天轮轴承损坏原因分析与处理

安钢炼铁厂7#高炉主卷扬上料系统关键设备——天轮,在安装使用不久出现轴承严重损坏,造成高炉不能正常上料。经过对天轮内部结构及轴承本身等方面进行改进后,取得了良好的使用效果。     

Blast Furnace Injections

This paper describes methods of calculation, which give the conditions to be fulfilled in order to tap the same quality of iron and have a smooth running furnace when a new matericd is injected into the blast. These calculations also show the effects of the injection upon the regularity of the iron, the production of the furnace, the coke rate, and the quality of gas produced. Included in the paper are the results of two industrial campaigns: one with natural gas and the other with light fuel oil.