宝钢3高炉冷却壁水管破损特点及操业对策

概括宝钢3高炉冷却壁水管破损的特点,分析了导致冷却壁水管破损的主要-炉况波动。提出操业对策以减少炉况波动,减少冷却壁水管破损。．     

酒钢6号高炉炉体破损调查

对酒钢6号高炉(450m3)停炉小修时的炉体破损调查进行了总结.重点考察了炉皮变形、冷却壁破损情况,对冷却壁进行金相分析,指出了冷却壁破损及炉皮变形、开裂原因,并提出了相应技术措施.     

武钢6号高炉中修破损调查

利用武钢6号高炉中修停炉的机会,对其炉衬和冷却器破损状况进行了调查,发现高炉风口组合砖已侵蚀殆尽,炉缸炭砖顶部未发现环缝侵蚀,炉缸圆周方向部分区域陶瓷杯尚有残存;高炉炉缸第5段、炉腹第6段冷却壁破损严重,破损部位主要集中在炉缸炉腹衔接部位;高炉炉腰第7段、炉身第8段冷却壁服役状况良好,未发生严重破损。通过分析认为,6号高炉炉缸可以满足一代炉龄15年的使用要求;炉缸炉腹冷却壁破损原因主要在于冷却壁结构不合理。为此,在中修后的6号高炉上改进了冷却壁结构设计,新型冷却壁服役效果良好,预计可以满足大型高炉的长寿要求和目标。     

天铁高炉镶砖冷却壁的破损分析及预防措施

天津铁厂5座高炉炉腹、炉腰都采用了镶砖冷却壁,其中1、2、4号高炉冷却壁的破损较为严重。通过对冷却壁破损原因的分析,提出了若干预防破损的措施,如改进冷却壁材质和结构、改进安装方法、改善高炉操作与维护等。     

武钢1号高炉炉腹炉身破损调查

对武钢1号高炉炉腹炉身破损调查进行了分析总结。认为,炉腹冷却壁破损的主要原因在于所采用的球墨铸铁冷却壁性能欠佳,冷却壁镶砖选材和炉腹冷却壁结构设计不够合理;炉腰、炉身采用的铜冷却壁,在高炉生产10年后依旧保存完好,未出现严重的烧损,表明采用的铜冷却壁完全能够满足高炉长寿的要求。     

武钢高炉冷却壁破损的原因

武钢1号、6号、7号高炉存在冷却水管破损严重的现象,停炉中修后破损调查发现,破损部位主要在炉缸风口段球墨铸铁冷却壁顶部及与之衔接的炉腹段铜冷却壁底部。究其原因,主要是炉缸风口带冷却壁与炉腹铜冷却壁的衔接结构不合理,当炉役末期炉衬减薄后,高温煤气流容易沿衔接部位串入冷却壁冷面,烧坏进水管,并造成整块冷却壁的蚀损。建议将炉腹铜冷却壁底部改为凸台设计,将进水管包覆在内,以阻止高温煤气流烧损水管,从而延长冷却壁的使用寿命。     

包钢l~#高炉炉体破损调查报告

本文主要介绍包钢1~#高炉中修停炉时对高炉炉衬和冷却壁严重破损原因及有害元素在炉内纵向分布进行的调查.分析了包钢1513m~3级高炉,当炉腹冷却壁总破损率达到40%以上时,标志高炉进入中晚期工作,≥80%时,高炉一代中修寿命基本结束.另外,根据高炉炉身冷却壁解剖分析结果,对冷却壁破损原因,提出了延长冷却壁寿命的途径.     

高炉铜冷却壁取样研究及破损原因分析

 在整个高炉结构中,炉身下部至炉腰炉腹位置是影响高炉寿命最薄弱环节之一,铜冷却壁应用该区域可形成“渣皮”作为永久性炉衬,有效延长高炉中部寿命,实现了高炉高效和长寿的统一。然而,在生产实践中渣皮频繁脱落,铜冷却壁热面裸露,导致铜冷却壁大面积破损,严重影响生产。针对鞍钢某高炉铜冷却壁破损情况进行了简单的介绍;采用金相分析、扫描电镜及能谱分析和化学分析方法,对破损的高炉炉腰段铜冷却壁进行取样研究。研究结果表明：在高炉内服役过程中,铜冷却壁中氧含量偏高,在受到高温煤气流冲蚀后,在其热面产生了“氢脆”现象,这是造成铜冷却壁破损的根本原因。提出了防止铜冷却壁破损的建议。     

从涟钢7号高炉中修看冷却壁设计的改进

涟钢7号高炉于2017年3-4月停炉中修更换了部分冷却壁。本文针对该高炉风口区冷却壁、铜冷却壁及炉身上部冷却壁的不同破损形态,重点分析了设计因素对冷却壁破损的影响,并对改进冷却壁设计预防破损提出了相关的建议。     

冷却柱技术引进与自主开发实践

2006年8月酒钢1#高炉炉腹6、7段冷却壁有4块冷却壁破损。当时引进使用铜冷却柱技术替代恢复已损坏冷却壁冷却功能效果良好。2007年以来6#高炉炉身冷却壁破损加剧,又引用同一厂家铜冷却柱技术。实践证明该技术是一种成熟可靠而实用的高炉护炉技术。但是随着4×450 m3高炉冷却壁频繁破损,依靠大量外购冷却柱来满足护炉需要的成本非常巨大,而且对企业的局限性很大。我们通过自主研制开发,生产出来可替代外购产品的铜钢一体冷却柱和钢质冷却柱,既节省了外购资金又完全满足护炉需要。     

1969 C.P.A. Institute.

Presents the program for the C.P.A. Institute entitled "The Role of Counseling Services on the Contemporary Campus." The Institute was held on June 2-3, 1969. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Laudatio: Prof. Dr. med. Dr. phil. Dres. h. c. Heinz H?fner

During the course of a year, there are many healthcare workers nationwide who sustain sharps injuries whilst carrying out their duties. Staff who work in the Accident and Emergency (A & E) units are no different from anyone else in this respect. The emotional cost of such an accident cannot be calculated, whereas the financial costs can. This article aims to show how the cost of an injury to a member of staff can be calculated, thus allowing a manager to assess the financial implications of sharps injuries to their department. In the absence of access to an Occupational Health (OH) department, most A & E units have to respond to sharps injuries to healthcare workers in the hospital. This task must be attended to by the medical staff as well as the nursing staff of the A & E unit. Within the following text the appropriate responses and methods to ensure uniformity of response are discussed. The tables and the calculation figures shown are taken directly from the information held in the St James's University Hospital Trust's OH department. All calculations are based on the middle band of the salary scale for each discipline. Accurate costings for each member of staff injured cannot be shown in this article, but the general principle is laid down and can be easily followed for any situation.     

Rats, Man . . .

Comments on the article by Richter entitled "Rats, Man, and the Welfare State" (see record 1960-02810-001). The commenter notes that in his article Richter did not indicate how hereditary and environmental factors were controlled. In comparing the hereditary survival characteristics of wild versus domesticated rats, it would be essential that the environmental influences on the survival characteristics of the wild rats should be ruled out. Another factor to be considered is that the wild state may offer a diet and other environmental influences, which in the life of a single individual would produce organic changes, accounting for some of the differences between wild and domestic rats. It would seem that the most effective way to determine the hereditary differences between wild and domestic rats would be to create a wild group, composed solely of the offspring of wild rats. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The blood-brain barrier. I. Histology. Physiology. Embryology. Transport

The concept of blood-brain barrier (bbb) arose in the beginning of the 20th century after report that the dyes injected intravenously did not appear in the brain. The idea and definition of bbb has been changed many times since then. We present current opinion concerning bbb, its histology, embryology, ultrastructure and function on the ground of a review of the recent literature.