MAC粉烧结性能的研究及工业实践

针对MAC矿粉在唐钢烧结中使用的可行性开展了铁矿粉物理化学性能、烧结性能的试验研究,通过生产试验,确定了MAC矿粉在烧结混料中的适宜配比.     

高品位镜铁矿烧结性能试验研究

为了探索烧结生产配加高品位镜铁矿的可行性,对该矿进行了矿物相和理化性能分析,并研究了其烧结性能和烧结矿的冶金性能,确定了该矿在唐钢烧结生产中的适宜配比.     

进口矿的性能与生产应用研究

通过对进口铁矿的烧结性能进行研究，为我厂合理利用进口铁矿提供了可靠的依据。     

进口铁矿的烧结试验及其生产应用

本文介绍了张结试验和生产中所用的进口铁矿的性能，并对进口铁矿在烧结混合料中的配比与利用系数、垂直烧结速度等之间的关系及存在的问题进行了分析，提出了相应措施。     

纽曼山、哈墨斯利、罗布河粉矿烧结性能的试验研究

对武钢从澳大利亚进口的三种铁矿粉进行理化性能的分析,并分别以不同比例配加国产精矿、粉矿进行烧结试验,通过对烧结矿产、质量指标、高温冶金性能以及烧结矿矿相等进行分析,寻求最佳烧结配矿方案。     

铁矿粉烧结液相流动特性

在铁矿粉烧结过程中,铁矿粉与CaO反应生成的液相的流动特性,是衡量烧结混合料能否有效粘结的重要指标之一.采用微型烧结法和基于流动面积的粘度测量法,以10种常用进口铁矿粉为对象,研究其液相流动特性及其影响因素.分析了铁矿粉的液相流动特性对实际烧结过程的影响.结果表明:不同种类的铁矿粉由于其自身特性的不同,所生成的液相的流动能力及其随温度、碱度的变化规律有很大差异.     

进口铁矿的技术经济评估

总结了鞍钢近年来进口的铁矿种类和数量，并对这些铁矿的物化特性及烧结性能进行了比较。指出，选购进口铁矿时，应综合分析其品位、杂质含量及运费等多方面因素对烧结技术经济指标的影响，并应坚持精料方针、货比三家及注意报单与实际成分的差别等购矿原则。     

安钢烧结应对铁矿原料变化的对策及生产实践

近几年来中国钢铁工业迅猛发展,对铁矿石的强劲需求促进国外矿的大量进口使用,研究进口矿的烧结性能已成为我国钢铁企业发展的重要课题。本文介绍了安钢烧结应对铁矿资源市场变化而采取的对策及生产实践。     

基于铁矿粉高温基础性能的烧结配料优化研究

对铁矿粉的高温基础性能进行了测定,并以此为依据,进行了烧结杯优化配矿试验.以垂直烧结速度、转鼓强度和低温还原粉化性能作为评价指标,考察了不同配矿方案的优劣.结果表明:当改变混合料中高温基础性能不同的铁矿粉配比时,会对烧结过程生成液相的数量产生影响,进而影响烧结矿产量和冶金性能.     

EXPERIMENTAL STUDY ON SINTERING PROPERTIES OF SPECULARITE

镜铁矿因成球性和可烧性较差,使得该矿在烧结料中的应用受到了极大限制.本文通过试验对镜铁矿制粒性能、烧结特性及冶金性能的研究,采取优化原料结构技术措施,探索出镜铁矿在烧结中合理使用新途径,为提高其在生产中的配比和改善烧结性能提供指导.     

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.