济钢低硅铁水吹炼工艺实践

介绍了低硅铁水的吹炼工艺实践。通过对少渣炼钢过程的理论分析,采用倒锥度氧枪、优化供氧及造渣制度、控制终渣碱度等措施,解决了低硅铁水炼钢的造渣、脱磷、脱硫、粘枪等技术难题,实现了低硅铁水条件下的少渣炼钢,降低了石灰消耗、提高了金属收得率。     

80t转炉少渣炼钢工艺实践

结合武钢炼钢总厂二分厂80t转炉实际生产情况,通过少渣炼钢条件的理论分析,探索出少渣炼钢工艺的操作特点,并将其应用于指导现场生产。生产实践表明,少渣炼钢工艺在降低渣料消耗、提高金属收得率和热效率方面取得良好的效果。     

120吨转炉“少渣炼钢”工艺的研究与应用

阐述了＂少渣炼钢＂工艺在济钢120吨转炉上的研究与应用情况。通过对＂少渣炼钢＂工艺机理的研究,对留渣量、前期枪位、倒渣时机、倒渣量以及加料模式等工艺参数进行了探索与优化,使石灰吨钢消耗控制在25 kg以下,钢铁料吨钢消耗控制在1 074 kg以下,取得了明显的经济效益。     

太钢LD转炉少渣炼钢初探

本文叙述了太钢50tLD 转炉采用预处理(脱硅、脱磷)铁水进行少渣炼钢的工艺技术;总结了转炉少渣炼钢的生产试验结果;讨论了转炉少渣炼钢工艺的操作技术、冶金特点及规律。1前言- 转炉炼钢的传统工艺是使用普通高炉铁水。因此,为了脱硅、脱磷、脱硫需要加大量石灰而造成大量熔渣,大渣量吹炼带来种种缺点:金属收得率低,熔剂消耗高、冶炼时间长     

LD转炉半钢炼钢的造渣工艺

介绍了国内外提钒半钢及“三脱”半钢炼钢的造渣工艺特点，主要包括造渣剂的选择、半钢少渣炼钢及留渣操作等，并结合攀钢目前的生产条件就攀钢提钒半钢炼钢的造渣工艺进行了探讨，并实现少渣炼钢的可行性做了分析。     

低硅铁水冶炼工艺优化

简介西林钢铁公司炼钢总厂低硅铁水冶炼工艺。生产实践表明,加强转炉热平衡控制,从转炉装入制度、供氧制度、造渣制度进行优化,加强前期成渣控制,中期保证炉渣泡沫化,有效解决低硅铁水冶炼成渣困难、热量少、易粘枪等难题,使此流程生产成本降低。     

高钛铁水转炉少渣冶炼技术研究实践

渣料消耗是转炉炼钢的关键经济技术指标之一,其值高低代表炼钢技术水平,与满足脱磷、护炉要求相矛盾。某钢厂受高炉矿原料配比影响,铁水钛、磷含量较高,为保脱磷、护炉满足要求,渣料消耗较高。为此,基于高钛铁水性质及其转炉成渣特征,优化转炉供氧制度、造渣制度,以“镁固钛”为技术核心,控制炉渣高TiO₂含量对脱磷、护炉的影响,提高渣料利用率。通过上述工艺的持续优化,形成了高钛铁水转炉少渣冶炼技术,渣料消耗由55.67 kg/t降低至45.86 kg/t,取得了较好的经济效益,为高效化炼钢技术发展奠定了基础。     

宝钢转炉少渣炼钢的实践

叙述了宝钢300t转炉少渣炼钢工业性试验及少渣条件下锰矿还原的试验结果。试验结果表明：转炉生石灰单耗达到11．3kg／t，轻烧白云石单耗达到6．3kg／t，锰矿加入量大于8kg／t，平均锰回收率达到50％以上。此外，分析了转炉少渣吹炼的冶金效果和工艺制度。     

对攀钢实现少渣炼钢的探讨

介绍了国内外少渣炼钢的技术现状,分析了攀钢实现少渣炼钢的可能性,讨论了与少渣炼钢相关的一些技术问题。     

济钢120t转炉“少渣炼钢”工艺的实践

对济钢120 t转炉在应用＂少渣炼钢＂工艺中出现的问题进行了分析,提出了相应的解决方案。通过采取优化控制参数和改进工艺操作等措施,解决了＂少渣炼钢＂工艺在试验推广阶段遇到的冶炼周期可控性差、兑铁时易发生喷溅、开吹不易起燃、前期脱磷效率低、二次降枪时易发生喷溅等技术难题。     

大型转炉低硅铁水炼钢研究

针对转炉低硅铁水炼钢成渣困难,渣量少不利于脱磷,容易产生粘枪、粘烟罩等问题,在吹炼过程中加入适量熔剂,枪位稍高于正常含硅铁水炼钢,设计化渣效果好、喷溅少的多孔喷头。低硅铁水炼钢化学热减少,可减少矿石、废钢用量,保证熔池金属正常的升温速度。低硅铁水炼钢可以实现少渣炼钢,有利于减少石灰消耗和提高金属收得率。     

Investigation on Steelmaking with Hot Metal Containing Low Silicon Content in Large Converter

Due to high PCI rate,lowcoke rate and high u-tilization coefficient on blast furnace,the siliconcontent of hot metal has been reduced obviously atBaosteel.For each reduced0.1%silicon content ofhot metal,the productivity of BF can be increasedby1.0%-1.5%,a…     

优化工艺配置实现转炉少渣量吹炼

结合湘钢第二炼钢厂的工艺条件，对留渣操作的热力学和动力学条件进行了分析。通过实施留渣操作，采用顶底复吹和铁水预处理新工艺实现了少渣冶炼，从而降低了石灰消耗，提高了钢水收得率。     

Thermodynamics of Phosphorus and Sulphur Removal during Basic Oxygen Steelmaking

Removal of impurity elements from hot metal is essential in basic oxygen steelmaking. Oxidation of phosphorus from hot metal has been studied by several authors since the early days of steelmaking. Influence of different parameters on the distribution of phosphorus, seen during the recent work of the authors, differs somewhat from that reported earlier. On the other hand, removal of sulphur during steelmaking has drawn much less attention. This may be due to the magnitude of desulphurisation in oxygen steelmaking being relatively low and desulphurisation during hot metal pre‐treatment or in the ladle furnace offering better commercial viability. Further, it is normally accepted that sulphur is removed to steelmaking slag in the form of sulphide only. However, recent investigations have indicated that a significant amount of sulphur removed during basic oxygen steelmaking can exist in the form of sulphate in the slag under oxidising conditions. The distribution of sulphur during steelmaking becomes more important in the event of carry‐over of sulphur‐rich blast‐furnace slag, which increases sulphur load in the BOF. The chemical nature of sulphur in this slag undergoes a gradual transition from sulphide to sulphate as the oxidative refining progresses.     

低硅铁水冶炼工艺实践

简介了川威炼钢厂低硅铁水冶炼工艺。生产实践表明,采取加入一定的钢包余渣和留渣操作等技术措施,可有效解决低硅铁水冶炼成渣困难、热量少、易粘枪、不利于脱磷及炉况维护等难题。     

低硅铁水冶炼工艺实践

简介了川威炼钢厂低硅铁水冶炼工艺。生产实践表明,采取加入一定的钢包余渣和留渣操作等技术措施,可有效解决低硅铁水冶炼成渣困难、热量少、易粘枪、不利于脱磷及炉况维护等难题。     

Research and development of blasting abrasive made of steelmaking slag

This study focuses on the development of a new type of nonmetallic steelmaking slag abrasive.The performance,processing,and application of steelmaking slag as a nonmetallic abrasive are introduced.The chemical composition,hardness,crushing value,and particle gradation of steelmaking slag are analyzed.A processing method for steelmaking slag as a blasting abrasive is suggested and evaluated.Compared with conventional abrasives such as copper ore sand and cast iron shot,processed steelmaking slag exhibits similar performance and can satisfy abrasive technical requirements.The derusting effect provided by steelmaking slag for a ship deck can reach the Sa2.0 level,and its recyclability is higher than that of copper ore sand.The derusting performance of steelmaking slag is similar to that of copper ore,and it can thus be used in repairing ship decks.     

100t转炉用含钛铁水冶炼高碳钢的留渣+单渣操作实践

针对100t转炉用含钛铁水冶炼高碳钢的前期成渣难于熔化、脱磷率低的问题,分析了含钛铁水转炉炼钢的成渣过程和炉渣的物理特性,开发了留渣+单渣工艺技术。循环利用终点炉渣,充分发挥渣中10%～13%FeO高（FeO）含量的特点,快速把含钛铁水冶炼前期的CaO-TiO₂-SiO₂三元渣系转变为CaO-TiO₂-SiO₂-FeO四元渣系,脱除钢中大部分磷。控制终渣碱度大于3.2、（TiO₂）含量小于5%,使转炉出钢[C]≥0.20%、[P]≤0.014%,转炉炼钢脱磷率达到88%～92%,石灰消耗下降到28 kg/t钢。     

利用选择性浸出和沉淀从高磷钢渣中提取磷

摘要：使用高磷铁矿石冶炼所产生的高磷钢渣被视为一种磷资源。为了回收高磷钢渣中的磷,研究采用了选择性浸出和沉淀的方法,对不同P2O5含量的高磷钢渣进行了研究。结果表明：高磷钢渣中P2O5主要富集在2CaO·SiO2-3CaO·P2O5固溶体中;pH值为5.0时高磷钢渣中大部分固溶体被溶解分离,磷溶出率超过81.0%,而铁溶出率低于6.0%,实现了选择性浸出;浸出后的低磷残渣可作为冶金熔剂循环使用;升高浸出液pH值后,磷酸根离子形成沉淀;回收的沉淀物中P2O5质量分数达到23.9%,可作为磷肥使用。通过本工艺,高磷钢渣中磷能被有效分离及提取,实现了资源化利用。