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新余钢铁公司25 t转炉溅渣护炉工艺的研究 总被引:1,自引:1,他引:0
采用缩小的冷态模型,对新余钢铁集团有限公司25t顶吹转炉的溅渣护炉工艺进行了研究。结果表明,顶吹气体流量的提高有利于增加炉衬的溅渣密度;当气体流量为7000m^3/h时,最佳枪位为1.4m;从整个炉衬的溅渣密度来看,最佳渣量为8%-10%,综合考虑炉衬和炉帽的溅渣量,最佳渣量为10%。将以上溅渣工艺参数应用到实际生产中,并采用改渣剂对高氧化铁终渣成分进行调整,新余钢铁集团有限公司转炉平均炉龄由2238炉增加到8721炉,最高炉龄达到11675炉。 相似文献
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底吹炉氧枪喷口形式对气泡形态及混合状况的影响 总被引:1,自引:0,他引:1
针对4种不同的氧枪喷口结构进行了冷态试验研究,采用高速相机获得了不同喷口下的炉内气泡形态,采用电导率法测试了不同喷口下炉内流体的混合状况。试验结果表明,在相同的气体流量下,不同的气体喷口时炉内气泡的形态十分相似,当采用结构最复杂的喷口时,炉内的混合状态是最好的,结构最简单的喷口混合效果最差,其最小响应时间较最复杂喷口增加约11%,均混时间增加约4.7%。 相似文献
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介绍了溅渣护炉技术在天铁集团30t转炉上的应用情况,采用该技术后取得了大幅度提高炉龄、提高转炉利用率、降低耐材消耗等效果。 相似文献
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转炉溅渣层炉渣的分熔现象 总被引:2,自引:0,他引:2
在实验室热模拟条件下,研究了转炉冶炼升温过程中粘附在炉衬上的溅渣层炉渣的物理化学变化。当温度达到1 350~1 380 ℃时,首次观察到溅渣层炉渣的分熔现象。实验过程中渣样重量、渣中TFe 含量及岩相组成三方面的变化情况证实了这一现象的存在。研究这一现象为正确制定炉渣调整工艺,进一步提高炉衬寿命及了解溅渣层在冶炼过程中的变化提供了理论依据。 相似文献
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介绍了山西新临钢炼钢厂溅渣护炉技术应用的生产实践和取得的效果。平均炉龄由1920炉提高到12176炉;年经济效益1400万元以上。 相似文献
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A slag layer is formed when slag is splashed onto refractory lining in BOF slag splashing process. The melting temperature of the slag layer and the adhesion of the slag layer to the lining refractory have an important effect on slag splashing and BOF lining life. This study investigates the adhesive behaviour of slag with different composition to lining refractories. It is shown that the slag can adhere to MgO particles in MgO‐C bricks well and no reaction is found between the MgO particles and the slag layer, but a gas gap exists at the interface between the slag layer and the MgO‐C matrix and there are iron granules within the slag layer, when the FeO content in the slag is high. The adhesion of the slag layer to the lining refractory can be improved with decreasing FeO content in the slag and lower carbon content in the MgO‐C bricks. BOF refractory lining life can be greatly increased due to better adhesion, high melting temperature, and stronger wear‐resistance of the slag layer. 相似文献
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WU Wei MENG Hua-dong LIU Liu YUAN Tian-xiang BAI Yan-jiang YAN Zhan-hui 《钢铁研究学报(英文版)》2012,19(7):20-25
The slag melting characteristic of slag forming and slag splashing for 300 t BOF less slag process is researched by combining the methods of the slag chemical composition, the melting point determination and the petrographic analysis. The results show that the melting point of final slag for less slag smelting is 20 ℃ lower than that for conventional smelting. According to results of the petrographic analysis, the C3S (3CaO·SiO2) and C2S (2CaO·SiO2) content for less slag smelting are lower than those for conventional smelting, while the RO (FeO, MgO, MnO, etc) phase and C4AF (4CaO·Al2O3·Fe2O3) phase are higher than those for conventional smelting. According to results of the chemical analysis, the (CaO) content and slag basicity for less slag smelting are higher than those for conventional smelting, while (FeO) and (MgO) content in slag for less slag smelting are almost equal to those for conventional smelting. The reason why slag melting point for less slag smelting is lower than that for conventional smelting is that the quantity of added fluorite for less slag smelting is more than that for conventional smelting. According to the analysis results the slag melting point is determined by the C3S, C2S, RO phase and C4AF content. According to the results of slag melting characteristic before and after slag splashing for less slag smelting, the present adjusting slag process has little effect. It is important to adjust the composition of BOF final slag. The (FeO) content in slag is to be reduced at the slag splashing and adjusting slag process for less slag smelting. 相似文献
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氧枪喷头射流的数值模拟 总被引:1,自引:0,他引:1
采用可实现k-ε模型对4孔氧枪的一个喷孔进行了二维流场模拟。以O2、N2和CO2射流为例,通过模拟计算确定在实际炼钢转炉环境下3种射流的流场分布,并对比分析了3种不同气源的射流特性,为进一步优化氧枪参数提供了依据;模拟计算也得出了激波和膨胀波的产生形式。结果表明,O2和N2的射流流场分布几乎不存在差别,而CO2射流流场核心区长度比前两射流要短,因此要达到同样的射流流场效果,要提高CO2射流的入口压力;在实际的操作环境下,很难做到完全满足喷孔的设计条件,产生了微弱的斜激波。 相似文献
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转炉氧枪喷头的优化设计与应用 总被引:1,自引:0,他引:1
介绍了转炉氧枪喷头设计中几个重要参数的选取与优化。结合氧枪喷头在生产实际中的使用情况,总结出氧枪喷头在设计制造及使用中的最佳操作原则,为氧枪设计者及炼钢厂使用氧枪提供了可靠依据。 相似文献