共查询到19条相似文献,搜索用时 78 毫秒
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直流电弧炉长弧泡沫渣技术 总被引:4,自引:0,他引:4
本文指出了直流电弧炉采用长弧泡沫渣技术的必要性及该技术的发展现状,总结了炉渣物理性质,化学成分,温度和气源等对炉渣泡沫化的影响,并介绍了电炉泡沫渣的操作工艺及实际应用效果,对宝钢三期150tDC-UHP电弧炉的泡沫渣工艺提出了看法。 相似文献
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通过向电弧炉中喷吹炭粉和氧气,进行泡沫渣炼钢操作,可降低电炉单位电功率消耗。提高炉渣中的FeO含量,使FeO和加入沥青焦炭提供的炭反应生成CO气体,形成泡沫渣。此吸热反应,可降低炉渣温度,加快Ca2SiO2的析出,提高炉渣的粘度,从而提高泡沫渣的稳定性。 相似文献
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根据碱性电弧炉在熔氧期迅速造合适碱度的炉渣能脱除钢水中大部分磷的机理,在钨铁冶炼中采用配加一定量的自钨矿,提高炉渣碱度并在精炼期造泡沫渣来脱除钨铁中的磷。 相似文献
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本文通过分析现代超高功率电弧炉冶炼工艺特点和影响脱磷的熔池温度、炉渣碱度、炉渣氧化性及渣量等主要因素,提出了优化现代超高功率电弧炉脱磷的工艺操作。 相似文献
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本文介绍了泡沫渣的基本概念,探讨泡沫渣形成的基本原理和影响因素,针对中、小型铸造厂的实际情况和生产条件,分析了普通功率电弧炉泡沫渣埋弧熔炼高锰钢的工艺条件和渣系选择. 相似文献
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宝钢含锌尘泥的循环利用工艺简介 总被引:4,自引:0,他引:4
对宝钢的含锌尘泥(转炉二次粉尘、电炉粉尘和高炉瓦斯泥)的厂内循环利用进行了研究,通过将含锌尘泥分别应用于铁水三脱、转炉造渣和电炉造泡沫渣工艺对循环利用工艺进行了试验,具体如下:将转炉二次粉尘和电炉粉尘的混合物取代烧结矿粉作为铁水脱磷剂,通过改善流动性,达到了与烧结矿粉相当的脱磷效果,在三脱处理中粉尘中的锌和铅含量得到了明显的富集,为下一步回收处理打下了基础.将转炉二次粉尘和电炉粉尘的混合物通过添加一定量生白云石和锰矿加工成冷压块,在转炉吹炼前期加入,促进了石灰的溶解,改善了前期化渣,提高了脱磷率,LT压块和矿石的耗量减少.造渣剂加入没有引起钢水的增硫明显,粉尘造渣剂的加入对钢水和炉渣成分没有影响.将高炉瓦斯泥通过添加一定量生石灰和生白云石并加工成冷压块后,在电炉熔炼期加入,强化泡沫渣操作,减少金属损失和碳粉用量.瓦斯泥压块加入后对钢水、炉渣成分和电炉的粉尘不会产生明显影响. 相似文献
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An empirical equation for the foaming index Σ of a CaO-SiO2-FeO slag was obtained by dimensional analysis. The effect of second-phase particles on slag foaming was well described by
calculating the viscosity of the mixture using the modified Einstein equation. The anticipated foaming in basic oxygen furnace
(BOF), electric arc furnace (EAF), and bath-smelting processes was estimated using the parameter Σ for various operating conditions
and slag compositions. For BOF operations, it is predicted that foaming is most extreme in the middle of the blow, and a stable
foam in EAF is achieved with less basic slags with low FeO contents. For bath smelting, foam heights of 5 m are possible,
and a higher degree of prereduction prior to smelting will reduce foaming (because of smaller gas evolution) and possibly
increase production rates. Running the process at a higher pressure will also reduce foam heights, because the volume of gas
generated is less.
Kimihisa Ito, Research Associate, formerly with the Department of Metallurgical Engineering and Materials Science, Carnegie
Mellon University 相似文献
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V. Sahajwalla M. Zaharia M. Rahman R. Khanna N. Saha‐Chaudhury P. O'Kane J. Dicker C. Skidmore D. Knights 《国际钢铁研究》2011,82(5):566-572
Electric Arc Furnace (EAF) steelmaking uses different carbon based materials as foaming agents. Depending on cost and availability, anthracite and metallurgical coke are among the conventional injecting materials. Considering the energy and green house gas emissions requirements, alternative carbon sources are put on the spot to replace, at least partially, the conventional materials, i.e. waste materials such as rubber and high density polyethylene (HDPE) plastics may react with gas and slag phases resulting in devolatilization, combustion and iron oxide reduction reactions. The addition of waste tyres and waste plastics in EAF steelmaking has been studied in detail by our groups at UNSW and OneSteel is developing a method for EAFs to use blends of different proportions of rubber/HDPE plastics and coke as a slag foaming agent. Initially, laboratory investigations were carried out to establish the feasibility of carbon and polymer blends as foaming agents. The enhanced slag foaming performance compared to coke was found to be in good accordance with the results obtained in the laboratory indicating an increased slag volume when using polymeric blends. Following the successful installation of materials handling systems at both plants, the use of a rubber and coke blend is no longer considered a trial and is instead standard practice. 相似文献
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电炉高效埋弧泡沫渣技术开发 总被引:1,自引:0,他引:1
电弧炉在各个不同的熔炼阶段,分别加入或喷入不同比全铁复合发泡剂后,使炼钢的全程实现了泡沫渣埋弧操作,不仅提高了热效率,而且还取得了较好的冶金效果。 相似文献
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介绍了宝钢电炉流程在生产低氮钢方面采取的主要技术措施。包括电炉提高铁水比、造泡沫渣、终点碳控制、EBT;LF气氛控制、造好白渣、埋弧操作;VD提高脱氮率,钢液成分对脱氮的影响;连铸钢包长水口及氩封防止钢液吸氮。 相似文献