应用ABC分析法管理漏水冷却壁

近年来,我厂有些高炉的冷却壁破损严重,造成向炉内漏水的现象,给高炉操作带来很大困难。在高炉休风、慢风时,往往采用关水或任其自然的盲目做法,结果出现两种情况:一是冷却强度不够,冷却壁进一步被烧坏;二是冷却强度过大,使水大量漏入炉内,造成炉冷或炉墙结厚,1986年我厂的高炉有二次炉冷事故就与冷却壁漏水有关,损失生铁产量6916t,焦炭2860t。自1987年应用ABC 分析法管理漏水冷却壁后,杜绝了这一事故,取得了增产节焦的效果。ABC 分析法的基本原理,就是主次因素分析。我厂把漏水冷却壁按严重漏水、较重漏水和一般漏水分别划分为A,B,C 三大类,以人类作为重点管理对象,并根据高炉不同的生产状况确定了水温差的控制值     

新钢10号高炉冷却壁漏水治理实践

通过对新钢10号高炉炉缸四段冷却壁漏水的原因进行分析,发现热应力是导致冷却壁水管剪断的主要原因。采用U型透明管检漏及冷却壁穿管修复技术后,冷却壁漏水现象明显改善。     

高炉立式冷却壁漏水及对策

马钢一铁厂在使用立式冷却壁后,发现各高炉立式冷却壁都有不同程度破损。为了查明其漏水对炉况,特别是对焦比的影响,曾在9号和12号高炉上进行了多次漏水测定。测定结果使我们得到了启示,促使我们对立式冷却壁漏水的机理进行研究,并提出了为延长立式冷却壁使用寿命应该注意的事项及对其漏水采取的对策。一、漏水测定进行漏水测定的方法是:采用两只水表串接在被检查的冷却壁进出水管路上测出同     

承钢5号高炉破损冷却壁修复技术实践

捅要:炼铁厂五号高炉铜冷却壁的冷却水管因炉壳上涨及冷却壁之间的压力灌浆造成高炉铜冷却壁水管被剪裂、剪断漏水,使高炉的生产顺行受到了严重影响。通过对冷却壁水管破损原因的分析。采用了氨气进行对高炉铜冷却壁氩弧焊冷焊接技术,达到预期的效果,对破损的冷却壁修复后成为完好的冷却壁,从而保证了高炉的安全生产和稳定顺行。     

试谈高炉冷却壁的检漏及维护

高炉冷却壁的检漏及维护，是炼铁工作者十分关心的问题，本文针对邯钢高炉具体情况，探讨了高炉冷却壁漏水的原因，检漏方法，漏水冷却壁的维护及预防措施。     

本钢5号高炉铸铁冷却壁穿管修复技术实践

通过对本钢5号高炉冷却壁破损的原因进行分析,采用冷却壁穿管修复技术后,冷却壁漏水现象明显改善,避免或减少了由于漏水造成的炉凉、炉缸冻结、炉墙结厚等事故,达到了安全稳定生产的目的。     

韶钢1号高炉漏水冷却壁穿管修复实践

韶钢1号高炉大修投产后,陆续发现高温区五层凸台冷却壁漏水,通过实施穿管灌浆修复后,漏水冷却壁全部恢复正常,达到了修复的预期目标.     

安钢1号高炉冷却壁整体浇注实践

对安钢1号高炉冷却壁整体浇注实践进行了总结,阐述了冷却壁整体浇注工艺及技术难点.利用环保限产停炉时机,采用冷却壁整体浇注技术更换了 1号高炉部分漏水冷却壁.1号高炉开炉后的生产实践表明,冷却壁整体浇注结构整体性好,操作炉型较为规则,稳定性好,能够形成稳定的渣皮,有利于炉况稳定顺行;与浇注前相比,高炉主要技术经济指标不断...     

料钟,冷却壁损坏原因与改进的探讨

林钢2~#高炉于1988年2月停炉改造,投产2年后,镶砖冷却壁出现漏水现象。到1991年10月26日停炉中修,共出现7块冷却壁漏水。本文对中修拆换下的料钟及冷却壁损坏情况的检测进行了详细的叙述。并针对大小料钟不同的磨损情况和冷却壁的漏水现象及断水处理后对相邻冷却壁的连带影响等,进行了分析。提出了改善高炉操作;改善料钟磨损环境;改进冷却壁本体结构和进出水管与炉壳连接方法等观点,供中小高炉借鉴。 料钟和冷却壁是决定一代高炉寿命的关键设备。为查清料钟、冷却壁损坏的原因,寻找延长使用寿命的方法,我们对1991年2~#高炉中修时拆换下的料钟和镶砖冷却壁,进行了损坏程度的测定与原因分析,现将测定分析结论及改进建议综述如下。     

技术信息

马鞍山钢铁公司钢铁研究所与第二炼铁厂合作开发的高炉冷却壁断管再植新技术在现场使用已获得成功。自1989年3月以来,第二炼铁厂3号和4号高炉运用该项新技术对6块漏水冷却壁的10根断管进行了再植,再植断管迄今为止尚无一漏水。断管再植后,避免了因冷却壁水管断裂造成漏水引起的高炉结瘤和炉冷事故,稳定了高炉操作,减少了炉温波动,延长了高炉寿命,增加产量,降低焦比。第     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.