太钢炼铁技术的进步

近年来,太钢炼铁厂在精料、喷煤技术、高炉强化冶炼方面不断追求技术进步,使炼铁生产水平逐年提高,各项技术经济指标明显改善,2003年利用系数2.266,入炉焦比367 kg/t.     

前言

太钢炼铁厂始建于1934年8月,已有70年的发展历史。解放前,太钢炼铁厂的前身西北炼钢厂炼铁部仅有2座小高炉,总容积390m~3,累计生产生铁20多万t。1949年4月太原解放,太钢炼铁厂迅速恢复了生产,当年产铁1.6万t。20世纪50年代的10年中,太钢炼铁厂生铁产量年平均增长幅度为74.70％。 1960年1月29日,当时山西省最大的一座高炉——1053m~3高炉的建成投产,为太钢年产钢100万t奠定了基础,使太钢得以跻身全国十大钢的行列,成为太钢炼铁厂发展史上第一个里程碑。改革开放以来,太钢炼铁厂更加充满生机活力。1987年2月26日,太钢职工自己集资兴建了330m~3高炉,标志着太钢进入了年产钢150万t的大型企业,成为太钢炼铁厂发展史上第二个里程碑。 1991年11月8日,具有现代化生产工艺和技术装备水平的1350m~3高炉建成投产,为太钢改变“倒宝     

包钢高炉特殊矿强化冶炼综合技术

为提高白云鄂博特殊矿高炉强化冶炼技术水平,在高炉精料和操作技术两大方面进行了优化,前者包括烧结和球团新技术应用、高炉含铁炉料结构优化、炼焦配煤优化;后者涵盖提高炉缸活跃性、改善煤气流分布及顺行状况等措施.应用这一综合技术,2006年包钢炼铁厂高炉平均利用系数突破2.0 t/(m3·d),白云鄂博特殊矿强化冶炼技术取得了显著进步.     

太钢高炉原料技术进步

对太钢高炉原料技术进步及炉料结构的优化进行了总结.近几年太钢高炉通过采取增加烧结矿比例、优化炉料结构、提高入炉矿品位等措施,并不断改进操作制度,使各项技术经济指标逐年提高,炼铁生产水平有了明显进步,2003年1季度全厂高炉利用系数达2.392,入炉焦比降到了366 kg/t.     

太钢高炉降低焦比生产实践

1998年以来,太钢炼铁厂通过采取改善高炉原燃料质量,加强原燃料入厂、入仓监督管理,实施高炉炉况预警体系,改进高炉操作技术等措施,使入炉焦比和综合焦比逐年降低,并达到了国内先进水平.     

八钢高炉炼铁技术进步

对八钢炼铁技术进步的主要经验进行了总结.近年来,八钢炼铁厂通过优化炉料结构,改善原燃料质量;实施技术改造,提高高炉装备水平;优化高炉操作和加强基础管理等措施,使炼铁生产水平得到大幅度提高,各项技术经济指标明显改善.     

提高原料"精料"水平促进高炉生产发展

文章介绍了包钢炼铁厂近几年来贯彻精料方针,在原料系统强化质量管理、采用新工艺,应用新技术,通过技术攻关和技术改造,促进了包钢高炉原料的"精料"水平.为包钢特殊矿冶炼取得历史性突破奠定了基础.     

南钢炼铁系统的技术进步

90年代以来,南钢炼铁系统的技术进步取得了长足发展一是精料,二是高炉装备水平提高,三是高炉操作水平提高,从而使高炉技术经济指标明显改善,高炉利用系数从1991年的1.804提高到2000年上半年的2.836.     

高炉炼铁精料的内涵

精料是全面优化高炉炼铁系统生产技术的基础。只有贯彻精料方针,才能实现高炉炼铁的节能降耗,提高炼铁各项技术经济指标,提高经济效益。近年来,国内外炼铁科技进步得到了迅速发展,主要表现在贯彻精料方针,并有了一些新的进展。我国不少企业的炼铁厂都在尽力做好精料工作,炼铁科技进步较快,但有的企业对精料不够重视,造成能耗较高、炼铁技术经济指标与先进企业存在较大的差距。炼铁工序是钢铁工业的耗能大户,约占钢铁工业总能耗的     

重钢3号高炉强化冶炼生产实践

本文对重钢炼铁厂3号高炉投产后的强化冶炼实践进行了总结分析.重钢3号高炉通过采取精料、提高热风温度和炉顶压力、富氧喷煤、优化上下部调剂等一系列措施,使高炉炉况长期稳定顺行,技术经济指标得到较大改善.     

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。     

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

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.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.