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从挡渣球挡渣法、气动挡渣法到挡渣塞挡渣法的发展状况,评述了这几种挡渣技术在实际转炉挡渣过程中的原理、特点和效果。介绍了宝山钢铁股份公司采用新的挡渣工艺——转炉闸阀式挡渣技术的生产实际情况,应用结果表明,闸阀式挡渣效率大于95%。 相似文献
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经过多年发展,转炉挡渣技术已有了长足发展,挡渣塞和滑动水口已渐渐成为挡渣技术的主要发展方向.实现挡渣设备的自动化和小型化,提高挡渣操作的成功率,会扩大挡渣技术的应用领域. 相似文献
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经过多年发展,转炉挡渣技术已有了长足发展,挡渣塞和滑动水囗已渐渐成为挡渣技术的主要发展方向。实现挡渣设备的自动化和小型化,提高挡渣操作的成功率,会扩大挡渣技术的应用领域。 相似文献
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经过多年发展,转炉挡渣技术已有了长足发展,挡渣塞和滑动水囗已渐渐成为挡渣技术的主要发展方向。实现挡渣设备的自动化和小型化,提高挡渣操作的成功率,会扩大挡渣技术的应用领域。 相似文献
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据“Trans.ISLJ”,1988;28(3):B—96报道,在出完钢时防止熔渣从转炉(BOF)流至盛钢桶,这对于提高合金的收得率;防止回磷;预防盛钢桶耐火衬的烧蚀和稳定钢的质量来说是非常重要的。因此,采用了多种挡渣方法,例如:挡渣球法;喷吹氧化钙法;塞棒挡渣法等。最近,加古川厂从澳钢联(Vest Alpine)引进了气动挡渣塞棒,用吹气塞棒从外部关闭出钢口, 相似文献
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介绍了宣钢150 t转炉悬挂式挡渣装置的性能、主要参数、工作方式、事故处理,对比了挡渣球出钢挡渣和挡渣塞出钢挡渣的使用效果,最终确定了挡渣塞出钢挡渣工艺。生产实践表明,150 t转炉采用挡渣塞挡渣出钢,可有效控制出钢下渣量,减少钢水回磷,提高了钢水质量和合金收得率,实现了降本增效的目的。 相似文献
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介绍了上海梅山钢铁股份有限公司炼钢厂150 t转炉挡渣工艺。使用挡渣帽和挡渣塞双挡渣并配合下渣检测仪联合使用模式,可以控制钢水回磷质量分数在5×10-6左右;提高出钢口使用寿命,冶炼IF、SPHC和H-235P钢时,出钢口平均使用寿命可以分别达到98、110和117炉;减少每炉下渣量约100 kg,提高了钢水洁净度。 相似文献
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介绍了鞍钢股份第三炼钢连轧厂260t转炉采用的挡渣镖挡渣工艺的布置、操作过程、主要工艺设备及参数,并将其与挡渣球挡渣工艺和气动挡渣工艺相比较,阐述了地面轨道型挡渣镖工艺的优点. 相似文献
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攀钢脱硫铁水撇渣工艺的改进 总被引:1,自引:1,他引:0
针对攀钢铁水条件及预处理工序的实际情况,通过对撇渣工艺的一系列试验研究,提出了切实可行的改进措施。试验结果表明,采用二合一砖撇渣器在技术上是可行的。撇渣效率达到97.6%,铁水流量为14.9t/min,满足了后序提钒工艺的要求,使钒渣中CaO含量下降到1.28%。 相似文献
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Flow Characteristics of Skimming Flows in Stepped Channels 总被引:2,自引:0,他引:2
Skimming flows in stepped channels are systematically investigated under a wide range of channel slopes (5.7°?θ?55°). The flow conditions of skimming flows are classified into two flow regimes, and the hydraulic conditions required to form a quasi-uniform flow are determined. An aerated flow depth of a skimming flow is estimated from the assumption that the residual energy at the end of a stepped channel coincides with the energy at the toe of the jump formed immediately downstream of the stepped channel. In a quasi-uniform flow region, the friction factor of skimming flows is represented by the relative step height and the channel slope. The friction factor for the channel slope of θ=19° appears to have a maximum. The residual energy of skimming flows is formulated for both nonuniform and quasi-uniform flow regions. Further, a hydraulic-design chart for a stepped channel is presented. 相似文献
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介绍了天铁炼钢厂中间包水模实验原理和过程,分析了斜、直、圆三种型式挡渣墙模拟结果,提出了合理的挡渣控流方案,在生产实践中使用效果良好。 相似文献
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Is Skim reading effective? How do readers allocate their attention selectively? The authors report 3 experiments that use expository texts and allow readers only enough time to read half of each document. Experiment 1 found that, relative to reading half the text, skimming improved memory for important ideas from a text but did not improve memory of less important details or of inferences made from information within the text. Experiment 2 found no advantage of skimming over reading the first or second half of every paragraph. Two final experiments using a hierarchical, Website-like layout of documents showed that the advantage of skimming found in Experiment 1 was dependent on the linkages between pages and, thus, the ease with which participants could navigate through the text. Data on page-by-page reading times and eye-tracking analyses from Experiment 2 indicated that Skim readers spent more time reading text that was earlier in the paragraph, toward the top of the page and in an earlier page of the document. These findings were interpreted as evidence in support of a “satisficing” account of skimming process. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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转炉挡渣塞的研究及其结构设计 总被引:2,自引:1,他引:1
通过水力模型试验,研究了转炉出钢时钢液和溶渣的流动规律,分析了挡渣球等挡渣装置命中率低下的原因,完成了带导向杆的陀螺形渣塞的结构设计,实践表明,本装置可以获得预期的挡渣效果。 相似文献