开展科技攻关提高喷煤比

承钢高炉冶炼钒钛磁铁矿，喷煤系统采用“高压、并罐、单管路加炉前配器”喷吹方式，喷吹无烟煤，通过近两年的喷煤设备改造与攻关，使喷煤比达到９０ｋｇ／ｔ以上。     

冶炼钒钛磁铁矿的高炉喷煤技术

冶炼钒钛磁铁矿的高炉,由于喷煤时未完全燃烧的煤粉进入炉缸,与高温熔渣接触,促使高熔点的钛的碳氮化合物生成,导致炉渣粘稠,使冶炼无法正常进行,因此喷煤技术被视为冶炼钒钛磁铁矿高炉的禁区。近年来,攀钢高炉采用高冶炼强度、低喷煤强度、均匀喷吹、氧煤混喷等技术改进工艺,使高钛型钒软磁铁矿高炉喷煤技术获得成功,并在攀钢1号高炉投入生产,实现了技术上的重要突破并获得良好的经济效益和社会效益。     

承钢高炉喷煤系统的改造和发展

承钢高炉冶炼以钒钛磁铁矿为原料，经过多次试验，研究，直到１９９４年，３＾＃，４＾＃高炉喷煤系统才正式投产，经过多次改造，喷煤工艺得到不断完善，促进了喷煤量的提高，取得了显著的经济效益，同时，对钒钛磁铁冶炼也有了进一步认识，为实现喷吹烟煤并能对全厂所有高炉进行喷吹，目前正对在现有系统继续改造和扩建，使承钢喷煤水平跃上一个新台阶。     

1979年-1982年一季度荣获国家发明奖炼铁项目

(1) 高钛型钒钛磁铁矿高炉冶炼新技术—攀枝花钒钛磁铁矿高炉冶炼试验组荣获一等奖(2) 高炉喷吹煤粉新工艺—首都钢铁公司喷煤试验组荣获二等奖(3) 新型液压倾柱式矮泥炮—宣化钢铁公司荣获三等奖     

喷煤对钒钛磁铁矿高炉冶炼的有利影响

通过对钒钛磁铁矿高炉冶炼的特殊性分析，认为在保证煤粉燃烧率的前提下，喷煤更有利于钒钛磁铁矿高炉冶炼，其煤比可以赶上普通矿高炉冶炼的领先水平。     

喷煤对钒钛磁铁矿高炉冶炼的特殊作用

通过分析钒钛磁铁矿高炉冶炼的特殊性,认为在保证煤粉燃烧率的前提下,喷煤更有利于钒钛磁铁矿高炉冶炼,其煤比可以赶上普通矿高炉冶炼的领先水平。     

承钢4号高炉提高煤比工业试验

承钢属于钒钛磁铁矿冶炼，春高炉喷煤具有特殊性，为了提高煤比，2001年4月份开始炼铁厂在4号高炉进行提高煤比工业试验，其间通过加强高炉操作，均匀喷吹、全风温操作，富氧鼓风，强化管理等一系列手段，使4号高炉，4，5月份煤比达到了152.9Kg/t、151.4Kg/t，入炉焦比达到390.4Kg/t、373.8Kg/t，并且炉况稳定顺行。     

兰炭用于高炉喷吹及其冶金性能试验研究

为了确定兰炭用于高炉喷吹对高炉冶炼的影响,对兰炭和无烟煤及二者的混合试样的哈氏可磨性指数、爆炸性及着火点性能指标进行测定分析,同时探讨了兰炭用于高炉喷吹过程中对配煤的冶金性能及对高炉冶炼的影响。研究结果表明:兰炭和无烟煤的混合试样的哈氏可磨性指数为64.85,爆炸性较弱,着火点为368.2,兰炭在高炉喷煤过程中可以改善无烟煤的哈氏可磨性指数、爆炸性和着火点。     

冶炼高钛型钒磁铁矿高炉喷煤试验成功的原因浅析

冶炼高钛型钒钛磁铁矿高炉喷煤的主要问题是钛渣变稠。高炉喷煤后，入炉煤粉是否燃烧安全，是否抑制了钛的过还原，既是钛渣变稠与否的主要原因，也是冶炼高钛型钒钛磁铁矿高炉喷粉试验成败与否的关键所在。     

攀钢高炉喷煤水平显著提高

攀钢面对高炉冶炼钒钛磁铁矿喷煤所带来的特殊难度 ,“九五”期间开展技术攻关 ,已取得重大突破 ,目前平均喷煤比已达 140 kg/ t以上。攀钢优化喷吹工艺 ,实现了系统的安全、均匀喷吹 ,设备年喷煤能力由 32万 t提高到 6 0万 t。同时改善燃料质量 ,提高风温至 1130℃ ,并开发了一整套强化煤粉燃烧的新技术 ,如大喷煤条件下的氧煤炼铁技术、混合煤喷吹技术、全风口喷吹技术。此外 ,还探索了高炉上下部调剂规律 ,进一步优化喷煤指标 ,采用多环布料和中心加焦技术优化煤气流分布 ,控制适宜的理论燃烧温度和鼓风动能 ,全风温操作 ,以煤量调剂炉况…     

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。     

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.     

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。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.