更换炉缸冷却壁的实践

第一炼铁厂l0#高炉成功地对炉缸6#冷却壁进行更换，并采取灌浆、单联供水、温度监控等一系列行之有效的防范措施，实践证明，在中型高炉局部更换炉缸冷却壁是完全可行的。     

一种高炉冷却壁修复的方法

高炉长寿是现代高炉追求的目标,高炉长寿就意味着经济效益的提高。冷却壁是高炉冷却的主要设备,冷却壁的工作状况直接影响到高炉寿命。冷却壁的损坏是高炉生产过程中发生的不可避免的情况,冷却壁损坏后的处理方式有三种。第一,减水或断水,这种方法不利于高炉强化冶炼和高炉寿命;第二,整体更换冷却壁,该方法休风时间长,损失产量大;第三,对损坏冷却壁进行修复,国内企业曾有过修复冷却壁的先例,但蛇形管内套管的修复方式无论采取什么措施,由于套管和蛇形管之间不可能无间隙配合,因此冷却效果都大为降低。天铁集团炼铁厂2号高炉2006年12月30日,发现处于炉缸区域的四段16#、17#冷却壁从中部断裂,并有冷却水从断裂处外溢。四段冷却壁为光面冷却壁且处于炉缸位置,已严重威胁到了高炉的安全生产。要保持原有的冷却强度,保证高炉的正常生产,按现有的技术方法只能对这两块冷却壁进行整体更换,需要休风在7天以上,不仅浪费大量人力、物力,而且影响高炉生产,将造成巨大经济损失。     

由冷却壁损坏谈高炉长寿

南钢两座新建大型高炉,设计采用了较多长寿技术,但投产不到一年时间冷却壁开始损坏,两年内大量损坏,严重影响高炉顺行和技术经济指标。2007年6月项修将2000m^3高炉B1段冷却壁更换为铸铜冷却壁,目前运行情况良好。2009年4月项修更换2500m^3高炉S1、S2段铜冷却壁,现已顺利投产。本文分析冷却壁损坏原因,进而探讨高炉长寿技术,提出高炉长寿建议。     

铁口冷却壁更换方案与焊接工艺选择

2#高炉铁口冷却壁因内漏已于高炉定修时进行了更换,同时炉前铁沟重新灌注,两检修项相互制约,通过对铁口冷却壁的拆除、安装以及整体安装后炉皮焊接工艺方案的分析确定,保证了高炉定修的顺利完成。     

莱钢1#750m3高炉炉壳变形开裂原因分析及改进

从冶炼强度、冷却强度、温度变化等几方面分析了莱钢 1#75 0 m3高炉炉壳变形、冷却壁损坏的原因。通过采取提高冷却强度、将冷却壁材质由耐热铸铁 RTCr-0 .5改为球墨铸铁 QT40 0 -18、改变冷却壁套管与炉壳间的安装方式、冷却壁之间填充碳化硅质的填料、控制炉壳开孔数量及质量、加强冶炼操作稳定炉况等措施 ,延长了高炉炉体的使用寿命。     

H钢厂1号高炉铜冷却壁损坏之原因

H钢厂1号5250m~3高炉B2、B3段铜冷却壁损坏严重,为保证冷却效果整体不得不更换成冷却板。结合1号高炉生产操作数据和设计特点进行分析,并与铜冷却壁损坏普遍原因进行研究对比,对1号高炉铜冷却壁损坏原因逐项进行排除或确认。基本上可以排除由于高炉操作不当而导致铜冷却壁的损坏,认为炉体结构设计不合理是引起1号高炉炉腹、炉腰部位铜冷却壁损坏的主要原因。     

2500m~3高炉挖补式更换冷却壁实践研究

高炉冷却壁是高炉冷却系统的重要设备,冷却壁的安装是高炉设备安装施工的重点和难点。文章阐述河钢集团承钢公司2500m3高炉冷却壁更换检修中的几个关键因素,并制定了相应的技术措施,高炉冷却壁更换成功。希望研究对同类施工具有指导和借鉴意义。     

莱钢3~# 1080m~3高炉炉缸更换冷却壁实践

为解决莱钢3#1080m3高炉铁口区门型冷却壁漏水情况,2011年3月采用焖炉方式进行年修,通过利用合理的冷却壁拆除、安装和密封方案及炉缸保水冷却、实时测温手段,成功更换了铁口区冷却壁和炉皮,消除了炉缸烧穿的隐患。     

球墨铸铁冷却壁与铜冷却壁的应用分析

对球墨铸铁冷却壁与铜冷却壁的性能、结构及使用情况进行了分析。铜冷却壁在高炉高热负荷区域使用，其优势明显，使用寿命长，不易破损。莱钢在1#、2#高炉上首次应用，目前应用效果良好。     

高炉破损冷却壁的修复

针对天铁2#高炉冷却壁破损的现状，对2#高炉4．5、6段冷却壁的损坏原因进行了分析，并通过不断摸索，找到了一种让破损冷却壁重新恢复冷却的方法，修复了破损冷却壁，为高炉进一步提高冶炼强度和延长高炉寿命创造了条件。     

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.