马钢4号高炉中心塌料的原因及处理

对马钢4号高炉中心塌料的原因及处理进行了总结。由于高炉采用中心加焦的布料模式,原燃料质量变差直接导致了高炉中心气流受阻,炉内压差持续升高,出现中心塌料。通过压差控制、布料控制、炉型控制,及送风制度和热制度的管理与调整,在较短时间内,使高炉恢复了正常。认为当原燃料条件变差影响炉况时,调整布料模式的效果有限,应当及时降低冶强、退负荷处理,确保高炉气流稳定,避免高炉操作炉型变化导致炉况失常。     

马钢2500m^3高炉强化实践

马钢２５００ｍ＾３高炉化强冶炼过程中,冷却设备破损加剧。通过控制合理的煤气流分布、加强高炉操作的维护、降低生铁含硅量等措施,高炉生产稳定顺行。     

新钢10#高炉稳定边缘气流操作实践

本文对新钢10号高炉稳定边缘气流操作实践进行了总结,通过采取控制合理的炉腹煤气指数、发展中心主导气流适当兼顾边缘等一系列措施,高炉煤气流得到了很好控制,煤气利用率得到提高,技术经济指标持续改善。     

马钢4000m~3高炉布料模式调整探索

对马钢4000m~3高炉以炉顶布料模式调整为重点的优化装料制度探索进行了总结。通过采取调整矿焦布料起始角、寻找合理布料平台宽度、改变布料角差、逐步减少并最终取消中心加焦等措施,提出了适合马钢条件的"平台+漏斗"的高炉炉顶布料方式。布料模式调整后2年左右的高炉生产实践证明,高炉的稳定性提高,高炉操作与运行参数明显改善,尤其是料柱的压差得到有效控制并降低到较低水平。     

马钢2号高炉长寿生产实践

马钢2号高炉第一代炉役寿命达到13年7个月,单位炉容产铁量11234t/m~3。2号高炉生产操作中兼顾了长寿与效率,其主要经验是以稳定炉况为中心,量化操作参数,确立放开中心稳定边沿气流的操作制度,维护合理的操作炉型等。停炉大修时的炉底炉缸破损调查表明,炉缸中最易受到侵蚀的铁口部位剩余炭砖厚度为530～540mm,尚处于可安全生产的范围。     

高炉煤气流分布控制技术

调整控制好高炉内煤气流的分布,保持高炉长期安全稳定顺行,是真正实现低成本炼铁的重要途径。分析了原燃料条件变化、操作炉型变化以及事故对煤气流分布的影响,并提出了改进措施。通过采取上下部调剂、保持炉缸热量充沛、日常操作标准化等措施,实现了高炉炉内煤气流的合理分布,提高了煤气利用率,降低了高炉燃料消耗,保持了高炉的长期稳定、顺行。     

邯钢5高炉煤气流调整操作

高炉煤气流的合理分布是是高炉生产最重要环节,日常生产过程中煤气流变化与操作参数匹配是高炉操作的重点,5#高炉通过煤气流的合理控制实现了11年零6个月炉役情况下保持2.65 t/m3·d利用系数、燃料比505 kg/t铁的生产指标.     

马钢二铁高炉强化冶炼实践

对马钢二铁总厂高炉稳定顺行优化操作和强化冶炼实践进行了总结.通过采取强化原燃料管理、合理优化操作制度、保持良好操作炉型、加强设备管理等措施,实现了高炉较长周期稳定顺行.     

空料线停炉操作实践

马钢第一炼铁厂9#高炉2001年11月18日停炉大修，由于采用全风量，高风温操作，并合理控制炉顶钉水量，取得了快速安全停炉的效果。     

包钢4#高炉稳定生产实践

文章针对原燃料条件不断劣化情况下,包钢4~#高炉稳定性变差,波动增多,通过合理匹配操作制度,维持两股气流合理分布,控制合理Tf值,加强炉前出铁管理,加强炉内操作,推行标准化作业,炉温稳定率大幅提高,4~#高炉实现长周期的稳定顺行。     

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.     

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.     

Botulism in Poland in 1996

A model is presented in which ion translocation through the F0 part of the ATP synthase drives the rotation of the ring of c subunits (rotor) versus the a subunit (stator). The coupling ion binding sites on the rotor are accessible from the cytoplasm of a bacterial cell except for the c subunit at the interface to the stator. Here, the binding site is accessible from the periplasm through a channel formed by subunit a. In the ATP synthesis mode, a coupling ion is anticipated to pass through the stator channel into the binding site of the adjacent rotor subunit, following the electrical potential. Occupation of this site triggers, probably by electrostatic forces, the rotation of the ring. This makes the binding site accessible to the cytoplasm, where the coupling ion dissociates. Simultaneously, this rotation moves again an empty rotor subunit into the contact site with the stator, where its binding site becomes loaded and rotation continues.