马钢铁水脱硫工艺实践

简介了马钢三炼钢厂1号脱硫站技术装备和主要工艺参数，对影响脱硫率的各种因素进行了分析。在铁水初始w(S)为0．010％～0．030％情况下，采用石灰、镁复合脱硫，脱硫率可达80％以上。并提出了三钢铁水脱硫站目前存在的问题及解决这些问题的相关建议。     

ASMS法铁水脱硫技术的开发和应用

4年多的生产运行结果表明,所开发的ASMS法连续脱硫技术能实现铁水连续脱硫,能自动排渣,脱硫效果好,具有铁水温降小、设备简单、运行可靠,操作简便,环境污染轻的优点。铁水脱硫率可达到85％,可使铁水w（S）达到0．010％以下,用此连续脱硫技术,综合脱硫成本低于喷粉法。     

含镁铁水脱硫剂在攀钢的应用

攀钢经过多种配方的镁脱硫剂试验后,确定用M4脱硫剂进行工业应用。并探索出与之相应的操作参数,当w([S]1)为0．0586％和w([S]ε)为0．0082％时,处理每吨铁水的脱硫剂成本在12．98元以下,脱硫率在86％以上。对含镁铁水脱硫剂在攀钢的应用进行了讨论与分析。     

攀钢铁水炉外脱硫的发展

介绍了攀钢铁水炉外脱硫的发展。就喷枪经历单孔直简型到多孔倒Y型的转变、脱硫剂从电石、石灰型到含镁型的发展、工艺参数优化发展进行了介绍。铁水炉外脱硫量从设计的220．9万t／a发展到2002年的380万t／a,脱硫效率达88％以上。2003年铁水脱硫前硫的质量分数为0．058％,脱硫后硫的质量分数为0．0086％,最低达到0．001％;脱硫成本达到12．78元／t。铁水炉外脱硫满足了炼钢工序冶炼低硫钢的需要。     

攀钢含钒钛铁水预处理工艺实践

就含钒钛铁水预处理工艺在攀钢投入使用的情况作了介绍。这种预处理工艺分两步,第一步是铁水脱硫,第二步为脱硫铁水提钒。三年的试验研究和生产实践表明,采用这种工艺可以把铁水[S]由脱硫前的0．04％－0．08％降低到0．02％以睛,甚至可以降低到0．01％以下。脱硫铁水经撤渣后,进行一次预处理,即转炉提钒。通过提钒。将铁水中的V提取进入钒渣,从而使铁水中[V]由原来的0．32％－0．34％降低到0．028％以下,而钒渣中（V2O5）达到19％左右。     

含钛铁水脱硫及转炉冶炼实践

分析了含钛铁水对铁水预处理脱硫、转炉冶炼操作的影响。通过采用渣铁分离剂、改进扒渣操作,有效降低了脱硫粉剂消耗和扒渣铁损;针对含钛铁水的转炉冶炼,采用双渣操作,通过控制放渣时机、炉渣碱度、放渣温度、放渣渣量等措施,显著提高了除钛效果;通过改进转炉热平衡计算方法,能够准确控制冶炼终点温度。工艺改进后,转炉冶炼终点的温度控制和成分控制基本达到冶炼普通铁水的控制水平。Ti和P含量分别为0．0026％和0．0091％,补吹率降到15．34％。     

钙镁系粉剂铁水脱硫技术及经济分析

论述了钙镁系粉剂铁水脱硫的反应特点和相关喷吹方式及技术，论述了该技术对铁水脱硫处理工序和高炉生产都具有显著经济效益，其复合喷吹技术是铁水脱硫的一项灵活，可靠操作成本较低实用先进技术。     

复合脱硫剂研究与生产应用

研究了在电石粉中加入部分辅助反应剂后，得到的复合脱硫剂及综在喷吹法铁水脱硫生产中的应用情况。试验认为，铁不脱硫效率达到了纯电石粉的脱硫效果。实际生产结果表明，在铁水平均流含量为０．０７１％，脱硫剂平均消耗为８．０８ｋｇ／ｔＦｅ情况下，平均铁水脱硫效率为９０．４５％；脱硫后铁水含硫量平均为０．００６５％，铁水平均温度损失为１９℃。达到了搅拌法的脱硫水平。     

CaO基粉剂铁水脱硫影响因素研究

在实验室条件下对不同配比的CaO基粉剂进行铁水脱硫实验，结果表明，适宜的CaO基铁水脱硫剂组分为：m(CaCO3)／m(CaO)=0．20～0．40，w(CaF2)=6％～10％及叫w(C)≤10％。在宝钢的铁水脱硫实际中，铁水温度、铁水初始硫含量、喷粉速度等都会影响脱硫率。     

镁基粉剂脱硫剂铁水脱硫技术

本文论述了镁基粉剂脱硫剂铁水脱硫的反应特点与喷吹方式以及该技术对脱硫处理工序的经济效益，其复合喷吹技术是铁水脱硫的一项可靠，灵活，操作成本较低的实用先进技术。     

KR法铁水脱硫效果的影响因素分析

简要介绍了210tKR铁水预处理装置的主要设备及工艺流程,根据涟源钢铁厂的具体生产情况,分析了影响210tKR铁水预处理脱硫效果的主要因素如铁水温度、脱硫剂单耗、铁水初始硫含量、搅拌时间等,结果表明脱硫效果随着铁水温度的升高而增加,随着脱硫剂单耗、搅拌时间的增加而增加,但有一较佳值,随着铁水初始硫含量的增加而增加,但有一临界值.     

Desulfurization of Hot Metal by the Injection of High-Quality Lime Powder

The desulfurization of hot metal by the injection of fluidized lime (≥94% CaO) is analyzed, when the lime consumption is 0.5–19 kg/t of hot metal. That results in 95% desulfurization; the lowest sulfur content in the hot metal is 0.003%. Decrease in sulfur content in the hot metal to 0.005, 0.010, 0.015, 0.020, and 0.025% with different initial sulfur content is observed, with the injection of different quantities of lime. Sulfur content below 0.001% is not observed and not guaranteed. Recommendations are made for optimal desulfurization of hot metal by lime. Their adoption increases the desulfurization, decreases the losses of hot metal and the temperature, and decreases the consumption of materials and the cost of the process.     

Study of New Hot Metal Desulfurization Process on 1t Desulfurization Experiments

For the lack of the present hot metal desulfurization processes in iron and steel industry, our group has proposed the in-situ mechanical stirring method for external desulfurization of molten iron and researched this new method. This paper investigated this new in-situ mechanical stirring hot metal desulphurization process on desulphurization experiments of one-ton scale by using the new desulfurizer. The experimental results indicated that the desulfurization efficiency of in-situ mechanical stirring desulfurization process is 90% and the lowest sulfur content in the treated hot metal is 23ppm. By comparing with the methods of direct throwing desulfurizer and in-situ injecting desulfurization, in-situ mechanical stirring desulfurization process is the suitable desulfurizaton method.     

莱钢120 t转炉铁水脱硫站工艺设计

莱钢120t转炉铁水脱硫站工艺设计流程顺畅，处理位采用在线布置。生产实践证明，此工艺特点突出和设计合理；与传统脱硫工艺相比，采用该工艺后倒铁次数明显减少、铁水温降减小、设备投资降低。     

铁水罐镁脱硫辅助除渣综合技术开发

介绍武钢第一炼钢厂铁水罐采用吹气辅助除渣的情况,通过吹气辅助除渣水力学模拟实验,并结合现场生产实际进行铁水罐脱硫辅助除渣综合技术开发,改善颗粒镁脱硫的扒渣条件.     

Thermodynamics of the simultaneous desulfurization and dephosphorization processes of hot metal with CaO- and BaO-based slags bearing MnO

The technical feasibility of the simultaneous desulfurization and dephosphorization process of hot metal with high basicity slags of the BaO-BaF₂ system is discussed from the thermodynamic point of view. The partition ratios as well as the degrees of removal of sulphur and phosphorus from the hot metal obtained after a single refining step with BaO-saturated slags have been compared to those achieved when typical hot metal pretreatment slags of the system CaO-CaF₂-SiO₂ (double saturated with CaO and 3CaO?SiO₂) were used. The experiments were carried out in graphite crucibles at 1573 K, under CO atmosphere. Considering that both the desulfurization degree and the dephosphorization degree of hot metal achieved with BaO-based slags, around 95 %, were much higher than those obtained when CaO-based slags were used, maximum 45 %, it was concluded that the simultaneous desulfurization and dephosphorization process of hot metal with high basicity BaO-BaF₂ slags is technically feasible. It has been verified also that the high basicity BaO-based slags led to manganese recovery degrees as high as 86 % and prevented at the same time the undesirable oxidation of carbon from the metal phase.     

纯镁铁水脱硫粘渣剂使用与改进

武钢第一炼钢厂将镁基喷粉铁水脱硫站改造成纯镁铁水脱硫工艺后因为脱硫后的渣少并且稀，不容易扒出，容易在转炉产生回硫。介绍了使用与改进粘渣剂，减少转炉回硫量的情况。     

喷镁脱硫法在铸管用铁水中的改进

永通铸管公司采用铁水喷镁脱硫工艺改善铸管用原料铁水条件,同时对喷镁脱硫效率低的原因进行分析,提出改进措施。通过采取增加脱硫前和脱硫后的铁水扒渣时间、调整镁粉载气压力与下料速度,确定合理的铁水液面高度,重新设置计算机专家系统参数等措施,提高了铁水脱硫率（平均达到了82％）,满足铸管用铁水的质量要求。     

Development of Slag Recycling Process in Hot Metal Desulfurization with Mechanical Stirring

In order to develop an environment‐friendly steelmaking process, a slag recycling process for hot metal desulfurization by mechanical stirring was designed. The process was developed with 70 kg‐scale hot metal experiments and actual plant tests. The recycled slag has a 70% desulfurization ability compared with that of virgin flux (CaO‐5%CaF₂). The lower efficiency of the recycled slag was caused by SiO₂ contamination carried over from the previous process. There is no particular size requirement for the recycled slag, as the effect of the recycled slag size on the desulfurization ability is small. The ratio of CaO in the recycled slag to total CaO should be less than 60% in order to prevent an increase in the amount of slag. Slag recycling operation can be repeated more than twice when the optimum conditions are applied. The slag recycling process was established in an industrial operation, and consumption of desulfurization flux decreased by 40% with the process compared with that without slag recycling. Slag hot recycling was adopted at another plant where consumption of desulfurization flux decreased by 50% compared to operation without slag recycling. The positive effect of hot slag recycling is estimated to be a result of the temperature of the recycled slag.     

铁水炉外脱硫的新进展

综述了近年来高炉铁水炉外脱硫的发展现状和进展。对几种常用炉外脱硫剂的脱硫效果和利弊进行了对比分析,提出了目前采用镁基脱硫剂进行深度脱硫是我国发展优质钢材、提高企业竞争力的良好机遇。