首钢长钢6号高炉优化休复风操作生产实践

针对高炉长期休风后的炉况恢复进行了阶段性研究、分析,归纳了日常生产操作中影响炉况恢复的因素,总结出了长钢6号高炉在长期休风状态下,快速恢复炉况的具体操作经验。     

八钢2500m~3高炉长期休风复风操作实践

文章介绍了因八钢新区2500m3A、B高炉限电,依次休风72小时、60小时。通过优化调整高炉炉外、炉内操作,快速恢复炉况,避免了因长期休风造成的炉况失常。     

酒钢7号高炉长期休风及炉况恢复实践

本文总结了酒钢7号高炉长期休风操作及炉况恢复操作,在总结分析历次长期休风经验的基础上,通过提高渣铁物理热、配加辅料改善渣铁流动性,快速加风、实时开风口强化,实现了炉况快速恢复的目的。     

包钢7~#高炉长期休风快速恢复实践

文章介绍了包钢7~#高炉长期休风的前期准备、方案制定及快速恢复经过。通过对休风前炉况的分析把握、休风过程中保温工作的实施及恢复过程中影响因素的应对,在对大高炉休风、复风过程的深入研究并大胆实践,总结出一套快速恢复的方法,向定量化、标准化靠拢,达到炉况快速恢复的目的。     

济钢3号1750m~3高炉无计划长期休风炉况恢复实践

对济钢3号1750m~3高炉无计划长期休风后的炉况恢复实践进行了总结。在复风过程中,按炉缸严重冻结处理,通过采取积极有效的操作措施,使炉况快速恢复。     

攀钢2号高炉长期休风后炉况快速恢复实践

对攀钢2号高炉,炉顶2米绳轮平台座子坍塌事故重负荷长期休风后,复风炉况快速恢复进行了总结。复风前根据炉况做了详尽的准备工作,复风时采取了使用优质的三期焦炭、提高炉温、稳定顺行、杜绝炉前事故等措施,缩短了恢复时间,实现了快速恢复炉况。     

安钢6号高炉短期休风后炉况的快速恢复

安钢6号高炉在长期稳定顺行时,通过精心操作,可以在短期休风后快速恢复炉况,主要方法是:做好前期准备工作;休风时出净渣铁,逐步减风,适当控制水压、水量及顶温;复风时处理好料动、赶料线、恢复富氧喷煤及出铁操作。高炉曾经短期休风108min后,在33min之内恢复全风作业,而炉况稳定顺行。     

八钢2500m~3高炉复风实践

八钢2500m3高炉实现了低焦炭强度下大高炉冶炼,但高炉休风后炉况的恢复困难,主要是炉热不足、恢复时间长。为了确保炉况快速安全恢复,对快速复风操作的可行性进行了探索和实践,铁水质量和产量得到显著提高。     

兴澄1280m3高炉快速休复风操作实践

本文对江阴兴澄特种钢铁有限公司1280m³高炉快速休复风的实践情况进行了介绍,对高炉快速休复风的操作要点和注意事项进行了阐述,对快速休复风的难点问题进行了分析,并总结了高炉复风后的炉况恢复情况。实践证明,通过高炉休风时取消净焦、提高焦比,加快渣铁排出速率,复风时加大初始风量等一系列操作措施的实施,明显缩短了复风后高炉炉况的恢复时间,实现了高炉快速休复风的攻关目标。快速恢复后1280m³高炉炉况稳定顺行,降低了高炉的运行成本。     

太钢4号高炉炉役后期长期休风后的快速恢复

对太钢4号高炉炉役后期长期休风后快速恢复的操作经验进行了总结,主要是:休风前炉况基础较好,没有波动;休风料安排控制合理,全炉燃料比合适;加风的速度和开风口的时机把握比较好;恢复过程的操作参数调整比较到位;渣铁排放安排较好,能够吻合炉况恢复的进程。     

宝钢3号高炉高煤比条件下快速复风操作实践

宝钢3号高炉实现高煤比操作后焦比大幅度降低，给休风后炉况的恢复带来了一些困难，主要是炉热不足、恢复时间长。为了确保高煤比条件下炉况快速安全恢复，对快速复风操作的可行性进行了探索和实践，取得了一定效果，由高煤比带来的复风困难问题从根本上得到解决，恢复时间明显缩短，复风过程炉热充沛，铁水质量和产量显著提高。     

武钢5号高炉破损冷却壁的修复技术

为了延长高炉寿命，武钢5号高炉采用了软水密闭循环冷却系统，但软水密闭循环冷却系统破损冷却壁的修复一直是个技术难题，通过不断摸索，武钢5号高炉找到了一种让破损冷却壁重新恢复冷却的方法-再生法。再生法就是在破损冷却壁中穿金属软管，让破损冷却壁重新恢复冷却，对延长冷却壁寿命非常有效。     

莱钢1880m^3高炉炉前操作技术进步

莱钢1880m3高炉通过铁口维护,单场出铁操作,炉前及时出净渣铁,长期休风后快速复风,改造主沟及撇渣器等,改善了炉前作业状况,提高了炉前作业效率,保证了高炉顺行。     

宝钢高炉长寿命实践

对宝钢高炉20年的长寿实践进行了总结分析。经历了几次高炉寿命制约因素的转变,通过高炉长寿系统工程技术开发和实际应用,宝钢高炉长寿技术取得突破,逐渐形成了具有宝钢特点的大高炉强化冶炼基础上的高炉长寿生产维护技术,使高炉长寿挑战更高目标。     

铸钢冷却壁破损原因探讨

依据济南钢铁集团总公司第一炼铁厂4BF生产实践，介绍了高炉铸钢冷却壁的破损状况；分析了其破损的原因；提出了改善冷却壁材质及结构、改进水质、提高软水流量、强化炉体点检和优化炉内操作等一系列相关的处理措施。4BF的实践对铸钢冷却壁的广泛应用将有一定的指导作用。     

八钢B高炉成功开炉实践

八钢B高炉2500m3成功开炉及快速达产为八钢后期大型高炉开炉及高炉操作提供了宝贵经验更为八钢快速发展奠定了基础。B高炉全部采用国产设备、最新工艺,通过制定及执行科学合理的开炉方案,加上开炉点火后合理的操作制度有效控制高炉冶炼进程,使高炉各项指标在较短的时间达到设计水平,为实现高炉高产、优质、低耗、长寿及环保打下了坚实基础。     

The relationship of various tibia bone measurements in hens

Tibias from 50 Single Comb White Leghorn hens were used to study the relationships among various bone measurements. The bone ash (BA), length, wet bone volume (V), fat-free dry matter (FFDM), fat-free bone density (BD; mass per unit bone volume), and bone breaking force (BF) were measured, and the BA concentration (BA/V) and BA as a percentage of FFDM (BA/FFDM) were calculated. Bone ash was highly correlated with FFDM (r = 0.975). The BD was poorly correlated with any of the parameters measured in the present study. The BF was highly correlated with BA (r = 0.922) and FFDM (r = 0.918), but less well correlated with BA/FFDM (r = 0.496) and BA/V (r = 0.694). However, the inclusion of volume2 significantly improved the BF predicting models when BA/V was used as predictor (R2 = 0.855), indicating that BF is not only a function of BA density but also of bone size. The BF adjusted for V may better reflect treatment effect upon bone status than BF alone. The coefficient of variation of BA/FFDM and BD was smaller (0.007) than the CV with BA/V (0.026), which may indicate the BA/V is potentially a better indicator of bone status than BA/FFDM and BD. Bone length was poorly correlated with BA, FFDM, and BF, but highly correlated with V (r = 0.844). The volume of the same bone measured by the water weight change method gave the most consistent measurement. The data showed that BA/V may be a better measurement to reflect the bone status changes of hens than other measurements tested. When BA, FFDM, or BF are used in laying hen's bone status studies, the data analysis needs to be adjusted for V, an V is closely correlated with these variables.     

鞍钢2580 m3高炉大批重操作实践

介绍了鞍钢11号高炉开炉后的炉况,包括高炉炉料结构和高炉冷却壁破损情况等,重点介绍了采用大批重布料制度后对炉顶温度、煤气流分布和炉体热负荷所带来的影响。生产实践表明,采用大批重布料制度后,煤气流分布合理,高炉一直稳定运行。     

Evaluation,Prediction, and Feedback of Blast Furnace Hearth Activity Based on Data-Driven Analysis and Process Metallurgy

For complex, difficult-to-control, and hour-delay blast furnace (BF) systems, the quantitative characterization, prediction, and adjustment of the BF hearth activity are significant in improving the furnace status. In this study, data including raw fuel, process operation, smelting state, and slag and iron discharge during the entire BF process are analyzed, with a total of 171 variables and 5033 groups of data. Based on the knowledge of BF technology, a comprehensive index of hearth activity is then proposed to quantitatively characterize and grade the activity level of the BF hearth; the rationality of this method is verified from the two aspects of furnace heat level and furnace status coincidence. Compared with the traditional single-machine learning algorithm, the performance of the proposed method that combines genetic algorithm and stacking exhibits significant improvement. The hit rates for 10% and 5% errors in the prediction and estimation of hearth activity are 94.64% and 80.36%, respectively. To enhance the BF hearth activity, quantized and dynamic actions and suggestions are also simultaneously pushed. The model of BF hearth activity is successfully applied in practical online production. During the application period, the average furnace hearth activity increases by 10% compared to the historical value.     

基于模糊数学的高炉炉况预测模型

建立了一种基于模糊数学的高炉炉况预测模型。该模型通过构造隶属函数 ,计算隶属度的方法 ,将不同量纲的参数予以规整化 ,较好地反映出各参数的渐变过程 ,从而为准确判断及预测高炉行程提供了有效手段