Modeling of Three-Phase Flows and Slag Layer Behavior in an Argon Gas Stirred Ladle

建立了底吹钢包内气/钢液/渣三相流动数学模型, 利用多相流动体积法(VOF)模拟了渣层运 动行为. 模型结果再现了底吹钢包内气/钢液/渣三相流动现象. 当Ar气被吹进钢包时, 在 钢液内产生气泡, 上升的气泡间 歇地冲击并突破渣层, 产生渣眼; 同时, 渣层发生波动, 波动频率随着Ar气流量的增加而增加. 参数研究显示: 220 t钢包底吹流量由100增加到 300 L/min, 渣眼直径由0.43增加到 0.81 m. 计算的无量纲渣眼面积与文献中渣眼的实 验结果很接近. Ar气喷吹期间, 渣层发生重大的变形, 近渣眼处的渣层变薄, 近钢包壁 处的渣层变厚. 渣眼周围钢液流速很大, 并导致部分渣滴卷入钢液中.     

Water management for sustainable steel industry

Abstract

The Worldsteel Water Management Project was initiated in June 2007 with the aim to prepare steel plants for future public and political pressures relating to water. Following several meetings and a presurvey, a water management survey was launched in July 2009. Data were received from 29 steel plants, representing 8% or approximately 111 million tonnes of the world’s total steel output in 2008. Results show that water consumption (consumption within this article refers to: intake water, when a complete steelworks is in question and to actual water needed by the process or facility (intake+reuse water) when talking at process level) at the steel plants varies from under 1–150 cubic metres per tonne of steel (m³ ts^?1) produced. The volume and quality of consumed and discharged water relate to steel plant configuration, geographical location and local legislation. Nearly 82% of all the water is used for once-through cooling. The data collected on for example, waste water treatment technologies and discharge quality are available in a digital database that can be used for, as an example, optimising water management within processes. This paper is based largely on the Worldsteel report ‘Water Management in Steel Industry 2011’ and outlines finding of the Water Management Working Group.     

抗粘渣性铁水包浇注料的开发研究

针对梅钢铁水包包嘴粘渣的问题，对铁水包浇注料各组分与铁渣间相互作用的机理进行了研究，开发出抗粘渣性铁水包浇注料。经试验表明开发出的浇注料使铁水包粘渣减轻，使用寿命远长于原浇注料，同时解决了现场环境污染，并降低了工人的劳动强度。     

Preparation and properties of alumina-magnesia precast block for ladle lining

An alumina-magnesia precast block was prepared by using high-alumina fused corundum as aggregate, and fused magnesia, ultra-fine Al₂O₃ and SiO₂ powders as matrix materials. A small linear expansion for the precast block was achieved through spinel formation from the reaction of MgO with Al₂O₃ in the matrix. The precast block showed a lower apparent porosity, higher modulus of rupture and better slag corrosion resistance compared to the traditional Al₂O₃-MgO-C brick. In addition, the practical application of the precast block to the ladle lining proved it to possess a better thermal insulation which could effectively prevent the temperature drop of molten steel during the refining process. It can be considered that the alumina-magnesia precast block could possibly be applied as a new type of ladle lining material for the production of low-carbon and ultra-low-carbon steel.     

铸造起重机起升机构的可靠性分析

介绍铸造起重机不同形式起升机构的系统可靠性分析方法，并以实例对其进行分析。     

连铸钢包用铝镁尖晶石-炭砖的研制及应用

针对铝镁炭砖在使用过程中残余膨胀过大、热导率较高等问题，从基质组成、鳞片石墨的粒度及加入量和生产工艺等方面进行了研究试验，在铝镁炭砖基础上研制开发出了综合性能优良的铝镁尖晶石-炭砖。     

赴智利花旗巴托钢铁公司考察概述

介绍了智利花旗巴托钢铁公司的康卡斯特型钢包炉和连铸机的操作技术和管理经验，简述了SWRH82B和SAE1018A的操作要点。     

铝镁尖晶石炭砖在盛钢桶上的应用

以铝镁尖晶石炭砖取代铝镁不烧砖在首钢第三炼钢厂９０ｔ盛钢桶上应用时效果良好．其侵蚀速率低，工作面反应层与变质层很薄，有较好的抗热震性能，尤其对抵抗碱性熔渣的侵蚀和渗透明显优于铝镁不烧砖。试验结果表明铝镁尖晶石炭砖的使用寿命比原用铝镁不烧砖提高一倍以上。     

带有顶渣的LF钢包炉熔池流动的数学物理模拟研究

根据相似原理，应用物理模拟与数学模型相结合的方法研究了４０ｔＬＦ炉水模型有顶渣时熔池的流场。     

70吨钢包吹氩的实践与效果

通过钢包吹氩试验及生产数据的统计分析,肯定了底吹效果优于顶吹。但是底吹的吹成率低,尚需改进。