120t转炉汽化冷却系统改造

通过3台120t转炉汽化冷却系统的改造,降低了烟道的故障频率,延长了烟道的使用寿命。提高了转炉作业效率,对炼钢生产的顺行有着尤为重要的意义。     

冶金专利信息

炼钢转炉余热废气发电装置;转炉烟道余热饱和蒸汽发电方法及其系统设备;转炉废气的处理装置;一种焦化废水零排放处理工艺;转炉排烟除尘设施。     

首钢国际工程公司助力德胜钢铁改善炼钢环境

<正>2015年2月,首钢国际工程公司与云南德胜钢铁公司签订转炉炼钢环境改造项目总承包合同。该工程通过转炉一次烟气净化回收和二次除尘系统的提升改造,加快污染源治理、改善岗位作业环境和区域环境质量,已于3月21日正式开工。该项目设计方案以尽可能不影响现场生产为前提,改造转炉一次除尘系统,包括按照目前转炉容量设计改造汽化冷却烟道系统,恢复完善汽化冷却系统的供水和蒸汽回收设施,保证系统的正常运行并实现蒸汽回     

120t转炉末段汽化烟道快换技术的实践

本文结合三钢120t转炉现场作业场地,应用电脑CAD软件绘图模拟设计制定吊装方案,并采用现代施工管理技术组织施工,取代了原有传统更换转炉汽化烟道末一段和末二段的方法,实现快速有效安全的完成二炼钢120t2#转炉汽化烟道的拆除更换。     

转炉汽化冷却系统故障分析及改进措施

<正>转炉汽化冷却系统是转炉炼钢的重要设备之一,主要分为高压循环系统、低压循环系统、给水系统、蒸汽回收系统,其主要作用是冷却转炉冶炼时产生的高温烟气及附加值的饱和蒸汽。由于其所处的工况恶劣,运行环境复杂,故汽化冷却系统的故障率较高,对转炉连续生产造成了不利影响。基于此,本文结合实例从汽化冷却系统的设计、设备运行参数分析、故障处理等方面入手,分析了高压循环系统、低压循环系统的改造升级,成功解决了汽化尾部烟道流量不足导致的烟道疲劳开裂以及裙罩流量低导致的频繁飞枪问题。     

转炉汽化烟道改造设计

从分析转炉汽化烟道存在问题的原因入手,阐述了汽化烟道改造设计的原理、方法。提出了一套经济适用的汽化烟道改造方案。     

天铁炼钢厂2~#转炉大修工程中吊装新工艺的实践

叙述了天铁炼钢2#转炉大修工程中新吊装工艺的实施方案。通过对转炉烟道、炉壳重量、尺寸和现场具体环境进行分析,提出利用转炉现场天车、平台大梁设置卷扬机和滑轮组进行吊装作业的新工艺方案。该方案巧妙地实施各段烟道及炉壳的拆装工程,缩短了工程时间,节省了工程费用支出,取得了良好的施工效果。     

转炉全智能炼钢控制系统研究及应用

随着新旧动能的转换以及对炼钢控制的要求,山信软件联合型钢炼钢厂对转炉炼钢进行全面改造,基于转炉副枪系统成功开发了智能炼钢技术,实现了全智能炼钢改造,达到了国内领先水平。     

酒钢不锈钢炼钢1#AOD转炉烟道更换方法研讨

文章以酒钢不锈钢炼钢1#AOD炼钢转炉为基本对象,重点围绕机械特性、工艺标准等方面展开探讨,融入至实际生产作业中,推出适用于AOD转炉烟道更换的可行方式,交代了操作难度、工艺流程,并对施工后的效果展开分析,以期给同行提供可行参考。     

150 t转炉汽化冷却烟道的研究及应用

论述了转炉干法除尘系统及其汽化冷却烟道结构,结合150 t转炉干法除尘系统的应用,介绍了适应性的设计和实际效果。转炉干法除尘系统的应用,消除炼钢污泥及污泥运输的二次污染,大幅度提高了能源的利用效率和各种副产煤气的回收利用。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.