宝钢高炉富氧喷煤技术的现状及设想

介绍了宝钢高炉喷煤系统的设备概况和二年多来的喷煤生产实践以及宝钢对高炉富氧喷煤的设想，２号高炉喷煤量已达到并超过设备最大能力。     

自动喷吹技术在5号高炉的应用

结合梅钢5号高炉喷煤工艺特点,采用喷煤量在线检测和连续喷吹速率调整等技术,成功开发了一种新型的喷吹控制模式,使自动喷煤技术得到了应用,提高了喷煤系统设备的安全性与稳定性,提高了每小时入炉喷煤量的控制精度,为高炉稳定顺行创造了条件。     

沙钢5800m~3高炉的合理喷煤比分析

<正>高炉喷煤是炼铁系统降本增效的重要措施,提高喷煤量是各钢铁公司努力的目标。目前国内的宝钢、太钢等企业实现长期保持在180 kg/t以上的喷煤比,取得了良好的经济效益。但由于原料和操作等多方面的限制,国内多数高炉还不能达到180kg/t以上的喷煤比。宝钢和日本的君津3号和4号高炉都尝试过200 kg/t以上的喷煤比,但并没有长期实现高喷煤比操作,君津3号高炉在喷煤比达到190 kg/t时,置换比大幅降低。沙钢5800m3高炉开炉至今,运行状况良     

喷煤量自动调节在高炉上的试验及应用

根据冶金部下达的为宝钢高炉喷煤安排的试验项目内容,1985年3月起在武钢1号高炉(1386m~3)上进行了喷煤量自动调节工业试验。1986年10月工业试验取得成功并在重叠式喷煤装置上首次应用于生产。本文对工业试验的特点和应用效果,重点对工艺要求、参数选择、控制原理、试验应用等进行了简介分析。     

宝钢2号高炉采用的新技术

宝钢1号高炉是70年代世界上装备水平最先进的高炉之一。随着炼铁技术的发展,正在建设中的宝钢2号高炉又作了较大的改进,特别是在炉料分布技术、喷煤、高炉长寿、节能和提高高炉自动化水平等方面。     

宝钢4号高炉开炉快速高产实践

凭借宝钢高炉五个开炉相关技术的支撑,运用陡升爬坡的加风方法,通过合理控制高炉煤气流的分布,并结合娴熟的高炉大喷煤操业技术,宝钢炼铁工作者在新建的4号高炉上成功地实践了高炉开炉快速高产技术。     

宝钢高炉高喷煤比技术分析

目前,国际上工业发达国家高炉喷煤平均水平在180一200 ,国际最先进水平是日本加古川厂高炉,创造出月平均266 kg八的纪录。近年来,我国重点钢铁企业高炉喷煤比进展缓慢,2004年上半年为114 kg八,与国际先进水平尚存在较大差距。 宝钢通过深人和细致研究,解决了影响高炉高喷煤比的诸多难题,并且在理论和观念等方面上有所突破。1999年g月宝钢1号高炉(4063 rn3)创造出月平均喷煤比260.6kg/t的最高纪录。2004年上半年宝钢1号高炉实现喷煤比206kg八,2002年、2003年宝钢全公司高炉年平均喷煤比达到203 kg/t的先进水平。宝钢高炉高喷煤比技术是世…     

宝钢4号高炉喷煤系统的压降模型

以附加压降法为基础,对整套宝钢4号高炉喷煤系统的压降作了模型计算.分别对水平管、上升管、以及不同曲率半径的弯管等建立了相应的固相摩擦因数经验式,得到了一整套计算喷吹管路压降的模型.与生产装置的运行结果相比,该模型的预测精度较好.这一模型的建立不仅对高炉喷煤系统的设计计算提供了有效的参考,而且还对现有的宝钢4号高炉喷煤系统的节能降耗给予了一定的理论支持.     

国内技术短讯

马钢二铁厂应用高炉富氧喷吹新工艺获得成功。到1995年3月20日止,全厂4座中型高炉 平均吨铁喷煤量达130kg。其中1号高炉吨铁喷煤量突破150kg,3月份达到155kg。 1995年3月15日,宝钢高炉煤气发电机组(14.9万kW燃气轮机组)开工,这是宝钢三期的 节能降耗重大项目。1996年底建成投产后每小时能燃烧36万m~3高炉煤气,供180t蒸汽, 发电能力为14.96万kW。     

应重视高炉喷煤工况及煤粉特性的基础试验工作

1 我国高炉喷煤基础技术与国外的差距 1999年,宝钢高炉年平均喷煤量超过了200 kg/t,这表明宝钢高炉喷煤操作技术已经达到了世界先进水平。但从总体上说,我国的喷煤技术仍然落后于世界水平,尤其在基础技术方面。德国有两家世界著名的气力输送(包括喷煤)工程公司——K(?)ttner和BMH,上钢一厂已从前者引进技术,后者也     

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。     

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。     

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.     

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.     

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。     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.