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。     

110t钢包滑板及其机构的改进与优化

通过优化滑板材质、调整滑板体积、优化滑板形状、改进钢包滑动机构等措施对原滑板进行了改进,改进后的滑板连滑率达到了100%,使用寿命达到了4次,基本上满足了生产要求。     

钢包炉上料除尘设备的设计

对炼钢项目中钢包炉、车间内外上料除尘系统设备设计改型从工艺、技术、投资、施工进度等方面进行了比较和论述,对设计改型后的系统进行了评价,为今后新建钢厂和旧钢厂环保除尘设备的改造提供了借鉴。     

模糊串级控制及其在精炼炉吹氩系统中应用

提出了通过模糊串级控制实现氩气最佳流量高定的新方法，并通过电极位置变化采用归一ＦＵＺＺＹ量化方法，实现主控制对象的的前馈补尝，通过试验证明该方法在整精炼明都能保证氩气流量的优化控制，为生产高质量的钢材提供了必要保证。     

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。     

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。     

Quantification and variability of Escherichia coli and Staphylococcus aureus cross-contamination during serving and consumption of cooked thick porridge in Lungwena rural households, Malawi

The study investigated bacterial transfer to cooked thick porridge via ladles and hands during serving in 29 households in Lungwena, rural Malawi. Household stored water used for hand and ladle washing, was contaminated with Escherichia coli and Staphylococcus. aureus from hands of members of the household or from contaminated ladles used in food preparation. The results showed that hands became contaminated with E. coli and S. aureus cells in the range 0.6–3.7 and 2.2–4.3 log₁₀ CFU/cm², respectively, following washing with the contaminated water. Ladles became contaminated with 0.9–3.2 log₁₀ CFU/cm² of E. coli cells whereas contamination with S. aureus on ladles ranged between 1.9 and 4.6 log₁₀ CFU/cm². Bacterial transfer from hands to food ranged from <1 to 3.6 log₁₀ CFU/g for E. coli and 2.1 to 4.2 log₁₀ CFU/g for S. aureus. Ladle surfaces transferred from 1.3 to 3.1 and from 1.2 to 4.3 log₁₀ CFU/g of E. coli and S. aureus, respectively, on to the food. Contamination of food by hands was significantly (p < 0.05) higher than that of ladles and transfer of S. aureus was significantly (p < 0.05) higher than that of E. coli. The amount of bacteria transferred to the recipient depended on the wash water type and bacteria type. The study has demonstrated that although the traditional cooking of thick porridge inactivates S. aureus and E. coli, the porridge can be contaminated with bacteria during consumption using hands and serving on to a plate with wooden ladles.     

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.     

南京钢厂3500mm 轧机大型机架的冶炼浇注

简要介绍了多包精炼在南京钢厂 3 5 0 0mm轧机机架生产上的应用。利用三包冶炼 ,成功地冶炼浇注了两片 3 5 0 0mm轧机的两片机架 ,是我公司迄今为止生产过的最大的铸件。