涂敷耐热材料的偏心型高流速水冷风口的研究

1.背景近年来,随着高炉的大型化,高温高压操作、富氧、从风口喷入辅助燃料等技术也飞速发展。在这些高难度操作技术中,突然发生的风口破损是妨碍稳定操作的重大原因。因此,防止风口破损已成为提高产量的重要课题。 2.研制经过风口破损大致可分为熔损和磨损两类,但临时性休风的原因大部分是由熔损所致。因此,根据风口的冷却方式以及熔损风口的解剖检查,进行了导热分析;并在研究风口结构的同时,还进行了风口表面喷涂材料的研究,最后研究出具有耐熔损和节能两大优点的偏心型高流速水冷风口。     

2500m~3 A高炉风口破损分析及对策

对八钢新区A高炉风口破损的原因及处理进行了分析总结。认为炉缸堆积是风口破损的主要原因。通过提高焦炭质量、改进操作和强化管理等措施,风口烧坏得到控制,保证了高炉生产的稳定顺行。     

双冷风口

武钢两座高炉投产以来,风口大量破损,曾严重的影响生产。风口破损原因总的来说不外乎以下三方面:1.原料质量变差;2.炉缸堆积,炉况不顺;3.风口的制造质量不好,材质和结构不尽合理。风口的大量破损不但给生产带来损失,而且也给炉前工带来繁重的劳动。鉴于这种情况,我们除了改进高炉操作以外,在风口结构上也想了很多的办法。其中双冷风口试验较好。     

邯钢3200m3高炉风口损坏原因及对策

对邯钢3200m3高炉风口大量破损的原因及对策进行了分析总结.通过提高焦炭质量,改进休风装料制度和操作制度,风口烧坏数量大大减少,取得了较好的效果.     

酒钢高炉风口破损原因浅析

酒钢嵩炉风口近几年来破损较严重,主要原因在于高炉炉况不稳定、炉缺不活。另外酒钢自产风口质量不好也是重要原因。为了减少风口破损,应从如下几方面采取措施:提高操作水平、稳定炉况;改善风口质量;坚持对风口进行共渗处理;风口检漏工作要及时。     

风口破损的原因分析及处理

风口破损是我们炼铁工作者常见的事故之一,有时直接影响了高炉顺行,对生铁的产量、质量及热能消耗都有很大影响。下面谈谈自己在操作中的几点体会。一、风口破损的原因分析风口破损的基本原理,是风口前形成了局部堆积,这种堆积是随着操作过程和冶炼条件的变化而变化的。一旦有堆积物形成,风口上方熔化了的铁水不能顺利地渗入炉缸底部,累积在堆积物表面上,形成铁水与风口接触的有利条件,促使风口受热而熔化。     

Corex风口破损分析

Corex是一种使用非炼焦煤及纯氧代替焦炭和空气的熔融还原炼铁新工艺。与高炉工艺相比,Corex风口区域的温度更高,风口的使用寿命是一项重大挑战。在JSW公司,更换烧坏的风口所造成的休风几乎占工厂休风时间的15%。详细分析了风口破损及生产操作参数对破损的影响,以了解破损机理和根源。所有形式的风口破损不可能用一种普遍的原因来解释,但主要的原因集中在:入炉煤粉(6.3mm)过多、煤的平均粒度偏小、渣铁倒灌、关闭风口、结瘤脱落及滑料等。     

影响高炉风口破损的四因子相关分析和回归分析

包钢高炉从59年开炉到74年底共坏风口17,073个,逐年风口破损数见表1。除了风口制造质量外,单就高炉操作工艺方面研究风口破损的原因也是相当复杂的,在高炉内随着操作状态的改变,各种物理的和化学的作用错综复杂牵连交叉的互相影响着,有的对风口有保护作用,有的有破坏作用。为了     

包钢高炉风口破损现状及其对策

本文调查了近年来包钢高炉风口破损状况,分析了破损原因,并提出减少风口破损的一些措施。     

酒钢高炉风口破损情况分析与对策

本文对酒钢高炉近三年来风口、渣口破损情况进行了汇总分析，探讨了风口破损原因及减少风口消耗对策。     

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。     

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.     

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)     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.