真空冶炼炉的改造及自动控制系统的开发

随着真空冶金技术的不断发展 ,真空冶炼设备需要不断的完善 ,提高自动化程度。着重介绍了小型立式真空冶炼炉的改造及相应配套自动控制系统开发 ,为今后提高大型真空冶炼设备自动化程度提供了参考     

真空冶炼炉自动控制系统的开发

介绍了一套自主开发的真空冶炼炉自动控制系统.经过小型真空炉实际验证,该系统性能稳定,控制准确,界面友好,提高了真空冶炼作业的自动化程度,降低了操作者的劳动强度,可推广应用到大型真空冶炼设备中.     

S7-300可编程器在中频感应炉的应用

介绍5t非真空感应炉的冶炼原理,电力系统。针对其继电器,模拟量控制系统,提出以PLC为核心的模拟继电控制系统,提高了设备的自动化水平。     

燕狮科技研发远程遥控开、堵口机

为了提高有色炉前设备机械化、自动化程度，宜昌燕狮科技开发有限责任公司开发出了多种型号的开口机、堵口机，配备远程遥控系统，能满足有色行业不同形状的冶炼熔炉开口、堵口作业的需要。     

一种临氢设备用铬钼钢的冶炼方法

正专利申请号:CN201811112231公开号:CN109161786A申请日:2018.09.25公开日:2019.01.08申请人:湖南华菱湘潭钢铁有限公司一种临氢设备用铬钼钢的冶炼方法,主要生产步骤包括铁水预处理、转炉、VD真空处理、LF精炼、RH真空处理,然后浇注成坯或锭。本发明利用现有冶炼生产设备,提供了一种低磷、低锡、低砷钢水的冶炼工艺,钢水中磷含量≤0.006%、锡含量≤0.     

关于高纯铁生产的研究

以由铁精矿粉直接还原出来的海绵铁为原料，以非真空尖炉和真空感应炉为冶炼设备，对纯铁的冶炼工艺进行了研究与试验。通过试验，找出了最佳冶炼工艺，研制出了纯度达到日本电解铁Ｆ级水平的高纯铁。     

顶底复吹转炉副枪控制技术应用概述

介绍了典型的转炉副枪控制技术应用的发展动态,该技术具有缩短冶炼时间、提高生产能力、提高冶炼效率、改善冶炼效果、减少氧耗、改善工作条件、延长转炉炉龄、提高设备利用率等特点,副枪的应用使炼钢实现了自动化。能达到节约资源和保护环境的目的。     

硅冶炼烟气减量化的分析与探讨

本文介绍了工业硅冶炼烟气的特征、硅冶炼烟罩的发展以及现在主流矮烟罩的结构,从矮烟罩的几何尺寸设计和烟气压力调控,以及密闭炉盖方面,分析烟气减量化的技术可行性,阐明要减少硅冶炼烟气的排放量,仅通过调整烟罩的操作不能实现,需要通过冶炼工艺提升、生产自动化程度提高和新型材料应用方可实现.     

VD控制系统改造

VD真空精炼炉主要是用来生产重轨、钢帘线等高附加值的钢种.原VD炉控制系统自动化程度不高,且经常出现故障.此次改造重新设计了自动控制系统,实现了VD炉的全自动运行,提高了控制系统的自动化程度,缩短了抽真空时间,减少了蒸汽的耗量.     

铅钙合金浇铸生产线设备的研制

铅钙合金浇铸生产线是为国内某大型冶炼企业研制的生产设备 ,介绍该设备组成、工作原理及特点。铅钙合金浇铸生产线自动化程度高 ,减轻了工人的劳动强度 ,改善的工作环境 ,具有良好的社会效益和经济效益。     

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)     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.