提高中频炉酸性炉衬寿命的工艺探讨

从筑炉材料的选择、筑炉工艺、炉衬烧结工艺、熔炼与日常维护保养方面对如何提高中频炉酸性炉衬寿命的工艺进行了研究,使炉衬的吨钢成本消耗大幅下降.     

复合炉衬在感应电炉熔炼铝铁合金中的应用

针对工厂采用以锻烧高铝料为骨料的中性炉衬做感应电炉炉衬熔炼铝铁合金时,炉衬寿命短.通过优化炉料颗粒度配比,炉衬结构由整体改进为复合结构,严格控制炉衬的打结、烧结工艺,炉衬的使用寿命获得了突破.与整体炉衬相比,复合炉衬的使用寿命显著提高,降低了修炉成本,提高了生产效率.     

浅谈提高电炉炉衬寿命的措施

本文通过介绍电炉炉衬的侵蚀机理、电炉炉衬材料、合理的炉衬烘烤烧结工艺以及良好的工艺操作等方面分析了影响炉衬寿命的主要因素,并简要地提出了提高电炉炉衬寿命的几项措施。     

中频感应电炉筑炉工艺探讨

中频感应电炉熔炼时炉衬材料工作条件严酷,以往的筑炉工艺寿命较短,根据某公司多年来生产使用情况,选择合适的炉衬材料、炉衬的打结、烧结工艺来提高炉衬寿命。     

降低中频无芯感应炉炉衬烧结能耗的研究

针对中频无芯感应电炉炉衬烧结时间长,电耗高,电炉生产作业率低的问题,研制成功了一种炉衬烧结时间短,电耗低,使用寿命长的新工艺。采用该工艺具有较好的节能效果。     

高铝矾土感应炉衬的研究与应用

阐述了高铝矾土炉衬较高的耐火度、优良的热稳定性、较好的抗渣性、良好的抗蚀性、炉衬的致密化烧结.适用于多种有色金属,普通铸铁、球墨铸铁、及多种合金铸铁,碳钢、合金钢、不锈钢和耐热钢的熔炼.熔炼中金属合金元素烧损低,可超装一倍的金属炉料.炉衬采用低温烘烤、快速升温、高温短时间致密烧结的工艺措施.炉衬的使用寿命多在150炉次左右,最高可达200炉次.     

8 t 大型熔铜中频无芯感应炉烧炉工艺研究

为了摸索出可靠的8t大型熔铜中频无芯感应炉炉衬烧结工艺,以便提高以后开炉成功率,对新型8t大型熔铜中频无芯感应炉采用的不同的炉衬烧结工艺结果进行了对比、分析、总结,经过分析对比认为,在烧结过程中,坩埚模结构、加料方式、感应炉运行功率等为决定开炉成败的关键。     

卤水镁砂捣打炉衬不烘炉冶炼普碳钢工艺简介

长期以来,我厂电弧炉炉衬修砌后必须经过烘炉、洗炉,然后才能炼钢。这种传统的工艺方法虽然能较好地起到烧结炉衬和去除炉衬内的气体和水分,但却要耗费大量的     

工频炉无云母板炉衬的试制和使用

本文叙述了无云母板绝缘炉衬的试制过程和使用效果。着重介绍了有关炉衬绝缘层、石英砂粒度配比、硼酸加入量和烘烤烧结工艺的试验方法。     

八钢公司发明专利（二）

4．专利名称：一种双联热兑的电炉炉衬烘烤工艺 发明人：俞海明、段建勇、解英明、王瑞利、胡永胜 专利号：ZL201210029941．9 专利权人：新疆八一钢铁股份有限公司 专利内容简介：本发明提供了一种双联热兑的电炉炉衬烘烤工艺。依据烤捣打料的烧结机理，采用双联热兑的电炉炉衬烘烤技术，缩短了电炉炉衬烘时间，减少了新炉衬冶炼第一炉过程中的吹氧量，使得炉衬的烘烤效果更好，冶炼电耗降低了三分之一，降低了成本。     

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.