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顶吹转炉溅渣护炉试验研究 总被引:1,自引:0,他引:1
采用水力模型的研究方法,针对马钢50t转炉溅渣护炉工艺进行了冷态模拟实验,孤优化工艺参数为:高温溅渣,枪位为1600 ̄1800mm,喷吹氮气的流量在11500Nm^3/h以上,喷吹压力控制为1.0MPa。 相似文献
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氧气顶吹转炉溅渣法护炉工艺的现状及其效果 总被引:1,自引:0,他引:1
例举了国内外顶吹转非溅渣法护炉工艺护龄和耐火材料的单耗。扼要介绍了我国太原钢铁公司和美国的两家钢铁氧气顶吹转炉溅渣法护炉工艺操作的一些特点、效果及其取得的经济效益,并指出该工艺技术在我国有着极其巨大的实用价值和广阔的发展前景。 相似文献
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分析了渣碱度、渣中FeO含量、出钢温度等因素对溅渣 护炉效果的影响,阐述了马钢二钢厂通过调整造渣制度、降低出钢温度、选取合适的渣料及溅渣工艺参数等措施。取得了较好的溅渣护炉效果。 相似文献
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介绍了我司三钢溅渣护炉的实践与转炉溅渣护炉的基本工艺理论;分析了影响转炉溅渣炉效果的炉渣成分、留渣量、冶炼温度、氮气流量、压力及枪位等因素;对溅渣护炉技术的应用提出了看法。 相似文献
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炼镍转炉溅渣护炉过程渣中MgO含量明显增加,为了研究溅渣体系合理渣型和提高溅渣效果,利用热力学计算和热态试验结合的方法分析了MgO对不同Fe2O3含量炉渣的液相比例、低熔点区比例、熔化温度和粘度等的影响。结果表明:ω(Fe2O3)=3.45%~13.69%时,随着MgO含量增加,炉渣高熔点铁镁橄榄石相比例增加,液相比例(CT)和低熔点区(P<1250)比例下降,熔化温度和粘度上升;ω(Fe2O3)>13.69%时,磁铁矿比例大大增加,熔化温度大幅上升,炉渣粘度略有下降。5.0%的MgO使C1200较大,C1250较小,熔化温度达1369℃,炉渣的粘结性和抗熔损性良好,5%MgO-FeO-Fe2O3-SiO2为溅渣合理渣型。 相似文献
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为将溅渣护炉技术应用于炼镍转炉,在实验室镁铬质坩埚中进行了热态模拟溅渣实验.结果表明:FeO-Fe2O3-SiO2-MgO渣系为镍转炉溅渣护炉的合理渣型,增加渣中MgO和Fe2O3含量可以明显提高炉渣熔化温度,相应渣中高熔点相铁镁橄榄石和磁铁矿显著增加,采用此类炉渣溅渣可在镁铬砖内壁形成高熔点的溅渣层;溅渣后坩埚内壁的溅渣层由反应层和挂渣层组成,其中反应层物相为镁铁固溶体和镁铬铁铝尖晶石,挂渣层主要由铁镁橄榄石和磁铁矿组成.溅渣时采用空气喷吹可增加渣中Fe2O3,适合作为溅渣气源. 相似文献
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详细叙述了湘钢80t转炉溅渣护炉的供气系统流程,自动控制流程以及氧枪的计算机控制系统。对转炉溅渣护炉的计算机控制程序问题进行了分析和探讨,并取得了初步的进展。同时,总结了采用溅渣护炉技术所取得的丰硕的经济效益和社会效益。 相似文献
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Physical modelling of slag splashing practice of an 80 t combined blown converter was conducted in this paper. Through measuring the mass flux of splashed slag, the effect of different operating parameters on slag splashing was investigated. By means of variance analysis, the influence significance of different operating parameters on slag splashing was obtained, and the optimal combination of operating parameters were acquired as follows: lance height 600?mm, top gas flowrate 18000?Nm3?h?1, four nozzles lance, bottom nozzle configuration D4, bottom gas flowrate 100?Nm3?h?1, and amount of remained slag 10%. In addition, the relation between the agitation energy of top blow and mass flux of splashed slag was discussed, and the estimation model for mass flux of splashed slag during BOF slag splashing practice was proposed through data analysis. 相似文献
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Slag splashing is the most effective technology to improve the furnace campaign of converter; however, due to the great difference of composition between the vanadium slag and the steel slag, the technology has not been applied in the vanadium extraction converter. To solve the serious problem of lining erosion in the vanadium extraction converter, in this paper, slag splashing with modified vanadium slag was studied. The results showed that the purpose of adjusting the state of vanadium slag can be achieved through the modification. The modified slag had good slag splashing performance. After slag splashing, the thickness of the furnace was increased by more than 10?mm. The content of CaO in the modified vanadium slag can be controlled less than 3%, and the quality of vanadium slag and semi-steel was not obviously affected. The metallic iron content in the slag was greatly reduced, which was beneficial to reduce the iron loss in the vanadium extraction process. 相似文献
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以120 t顶底复吹转炉为原型进行溅渣动力学冷态模拟研究,通过顶吹气体流量、熔渣黏度、枪位和留渣量的单因素试验及正交试验,得到各因素对溅渣的不同影响.使用极差和方差分析确认各因素对炉衬的溅渣密度影响顺序为:顶吹气体流量>熔渣黏度>枪位>留渣量,并得到最优化试验方案为溅渣枪位160 mm,顶吹气体流量51 m3/h,熔池留渣量12%,熔渣黏度0.000 89 pa·s,此时所得溅渣密度为23.07 g/(m2 ·s).该结果在天津钢铁集团有限公司得到应用,取得了很好的经济效益和冶金效果. 相似文献