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本文闸述了宝钢300t转炉完善挡渣出钢技术所做的工作,开发了挡渣帽,改造了挡渣球装置,论证和改进了挡渣球参数,总结了挡渣操作诀窍,加强了出钢口管理,从而明显地改善了转炉挡渣效果。 相似文献
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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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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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挡渣出钢法是提高钢水质量的一项有效措施,针对二炼钢转炉生产的实际情况,研制成功挡渣球车,用在出钢后期加入挡渣球。实用结果表明:该车设计合理,运行可靠,有利于改善钢水质量。 相似文献
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In recent years, the role of human activities in changing sediment yield has become more apparent for the construction of hydraulic engineering and water conservation projec-tions in the Upper Yangtze River, but it has not been evaluated at the macro scale. Taking Sichuan Province and Chongqing City as an example, this paper studies the relationship between socio-economic factors and sediment yield in the Upper Yangtze River based on section data in 1989 and 2007. The results show that sediment yield is significantly correlated with population density and cultivated area, in which the former appears to be more closely related to sediment yield. Moreover, in the relation of sediment yield vs. population density, a critical value of population density exists, below which the sediment yield increases with the increase of population density and over which the sediment yield increases with the decrease of population density. The phenomenon essentially reflects the influence of natural factors,such as topography, precipitation and soil property, and some human activities on sediment yield. The region with a higher population density than critical value is located in the east of the study area and is characterized by plains, hills and low mountains, whereas the opposite is located in the west and characterized by middle and high mountains. In the eastern region,more people live on the lands with a low slope where regional soil erosion is slight; therefore,sediment yield is negatively related with population density. In contrast, in the western region,the population tends to aggregate in the areas with abundant soil and water resources which usually lead to a higher intensity of natural erosion, and in tum, high-intensity agricultural practices in these areas may further strengthen local soil erosion. It is also found that popu-lation tends to move from the areas with bad environment and high sediment yield to the areas with more comfortable environment and less sediment yield. The natural factors have greater influence on sediment yield of western region than that of eastern region. Generally,the natural factors play a dominant role on sediment yield in the Upper Yangtze River. 相似文献
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介绍了挥发窑低浓度二氧化硫烟气钠碱法脱硫的生产工艺、生产过程中存在的问题和不足,提出了技术革新的主要措施,改造后,实现了长周期稳定运行,提高亚硫酸钠产量和品质,降低了碱耗,尾气达标排放,创造了较好的环保效益和经济效益。 相似文献
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传统的通风系统主风机都是在工频(50Hz)和固定的转速、功率运行,造成较大的能源浪费。文章根据开采深度不同,研究阻力大小变化,通过调整主风机的电机频率、转速与通风网路匹配,同时也随着产量、井下作业时段调整,从而达到通风和节能的目的。 相似文献
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简述了Q195拉丝钢具有低碳、低硅、低锰的特性,钢水过氧化偏差大直接对合金收得率、钢水可浇性、钢水收得率、炉衬侵蚀、钢水中氧化夹杂物质量分数和生产事故等各方面的影响。炼钢厂对造成Q195钢过氧化现象的原因进行了探讨与分析,最终通过确保原材料质量、提高转炉一倒三命中率、优化脱氧工艺、落实钢包冶金、减少各类温降、优化生产组织、提高操作水平等方案,使Q195钢过氧化钢水得到有效控制,技术经济指标达到理想水平。 相似文献
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CSP(Compact Strip Production)生产的钢卷必须适当降低强度,才能适应冷轧生产的要求,降低强度的前提是不影响冷轧产品的性能.研究和生产实践表明:控制钢中[C]、[Si]、[Mn]、[P]、[S]、[Als]、[B]、[O]和[N]在合适的范围,能够降低冷轧基板的屈服强度;合适的铸坯出炉温度、终轧温度和卷取温度以及控制轧制压下量,控制机架间水阀开度,手动关闭或开启集水管水阀能够降低冷轧基板屈服强度.通过这些措施,涟钢冷轧基板屈服强度得到了有效控制,能够满足冷轧批量生产的要求. 相似文献