镁质干式料中间包烘烤工艺改善实践

针对某钢厂中间包工作层在使用时出现塌包问题,通过对干式料烘烤过程强度、烘烤升温变化规律等进行测试分析,发现烘烤工艺不合理是诱发中间包工作层塌包的主要原因。对镁质干式料中间包工作层烘烤工艺优化改进后,烘烤过程均匀升温,减少了干式料内外表面强度偏差,消除了烘烤不合理导致的塌包问题。     

中间包干式料工作层的烘烤改善实践

中间包干式料工作层会发生烘烤时塌包的现象。经过大量的实践探索,通过规范干式料工作层制作流程,避免操作不当造成裂纹或塌料;调整干式料配方,通过配入硼酸加强中温强度;优化烘烤曲线,延长干式料工作层在200-800℃温度段的烘烤时间,从而减少气体大量聚集等,可以解决中间包干式料工作层烘烤时塌包的情况。     

中间包干式料专用环保脱模剂的研制

以滑石粉、轻质碳酸钙粉、少量鳞片石墨以及乳化剂、膨松剂、快干剂为原料,采用在300℃强烈分解的多羟基糖类为结合剂,研制出一种中间包干式料专用环保脱模剂.研制的脱模剂涂刷容易,脱模方便,易于清理,不损伤干式料层,干燥时间短,成浆存放时间长,且在300～400℃烘烤时不产生污染烟气.     

高铝矾土对中间包镁质干式振动料性能的影响

中间包镁质干式振动料具有烘烤时间短、施工方便、使用寿命长且不污染钢液的特点,添加高铝矾土为改性剂进行了改善镁质干式料性能的实验.结果表明,添加高铝矾土能增强干式料的烧结性能,同时在不降低干式料抗熔渣侵蚀性的情况下提高了干式料的抗熔渣渗透性.     

中间包镁质干式料工作衬横裂原因分析及改进措施

唐山不锈钢公司中间包镁质干式料工作衬在低温烘烤后经常出现包壁横裂现象,产生横裂的的中间包工作衬无法正常使用,严重影响唐山不锈钢公司的连铸生产。因此,对中间包镁质干式料工作衬横裂现象进行了分析,并提出了相应的改进措施。通过使用观察,改进效果显著,解决了唐山不锈钢公司中间包镁质干式料工作衬横裂的问题。     

镁质中间包工作衬的研制与影响因素分析

针对目前所用的镁质干式料的不足,研制出以电熔镁砂为主要原料,二氧化硅微粉和粘土为结合剂,活性三氧化二铝细粉为烧结剂的镁质干式料,讨论了结合剂和烧结剂对干式料性能指标的影响。试验表明：研制的干式料性能优良,施工方便,平均使用寿命可达47 h,满足中间包使用要求。     

洁净钢用镁质干式料的研制与影响因素分析

针对目前所用的镁质干式料的不足,研制出以电熔镁砂为主要原料,SiO2微粉和粘土为结合剂,活性Al2O3细粉为烧结剂的镁质干式料,讨论了结合剂和烧结剂对干式料性能指标的影响.试验表明:研制的干式料性能优良,施工方便,平均使用寿命可达46h,满足中间包使用要求.     

中间包环保型干式料的研制

以电熔镁砂、中档镁砂为主要原料、选取环保型无机粘合剂代替酚醛树脂进行中间包环保型干式料的技术研究，采用该技术研制的干式料不含甲醛和游离酚，在烘烤使用过程中不产生有毒、有害气体，不危害环境和职工身体健康，不含残碳，不污染钢水。     

中间包镁质干式涂料烘烤剥落问题的分析

分析多次发生中间包工作衬在烘烤时和使用中大面积坍塌和局部剥落的原因,介绍实施模拟烘烤试验,并提出中间包烘烤优化措施。     

中间包镁质干式振动料的优化

以烧结镁砂和电熔镁砂为主要原料,以酚醛树脂结合剂作为基准,讨论了干式振动料的最佳粒度配合;试验、比较了几种结合剂特征性能和促烧剂的加入量,为中间包干式振动料在实际生产中的优化提供方案。     

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.     

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.     

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.