建议无钟布料采用料流宽度划分布料挡位

通过分析布料过程中不同颗粒的运动过程,提出以多颗粒料流轨迹集合为基准,以料流宽度来划分布料挡位,确定高炉操作布料矩阵,提出料流宽度和挡位划分的相协同的原则,以及料层厚度和料流宽度相协同的原则,避免料流宽度与布料挡位宽度不一致造成的炉料分布误差。     

济钢3200m~3高炉无料钟炉顶料面实测分析

济钢3200m3高炉采用激光网格法进行了开炉装料实测,确定了料罐最大容积为66m3,中心加焦角度为14.5°,同时找出了排料速度和料流调节阀开度的关系,测定了料流轨迹和宽度、料面形状等,根据测量结果确定了开炉和正常生产时的布料参数。实践证明,开炉后料面形状合理,实现了高炉快速达产达效,煤气利用达到50.5%,燃料比510kg/t。     

高炉无料钟参数对料流轨迹的影响

高炉炉料入炉其料面的落点分布受炉顶布料设备参数、操作参数以及煤气流的影响.在总结前人料流轨迹计算模型的基础上,考虑了科氏力及三个方向煤气曳力对炉料运动的影响,建立了料流轨迹数学模型.应用VC编写程序,计算并分析各参数对料流轨迹的影响,结果表明,科氏力对料流轨迹影响较大;径向煤气流由高炉中心流向边缘时,落点半径随粒径的增加而增大;煤气流由高炉边缘流向中心时,落点半径随粒径的增加而减小;小粒径焦炭和烧结矿受煤气流影响较大.     

武钢4号高炉料面形状的测定

武钢4号高炉(2516m~3)第二次大修后采用了串罐无料钟炉顶设备。在高炉开炉装料过程中,对下料罐的最大装料能力、料流调节阀开度与料流量之间的关系、焦炭和矿石的布料轨迹以及料面形状等进行了测定,并观察了十字测温装置对高炉布料的影响。通过料面形状的测定,选择了合适的布料矩阵,初步掌握了无钟布料的规律,为4号高炉顺利开炉和达产创造了条件。     

无料钟高炉采用倾角跳变与螺旋布料时布料方程的研究

本文根据高炉在冶炼强度提高时,整个高炉纵截面的煤气流分布趋向均匀化的实际情况,对无料钟炉顶布料制度的数学模型进行了研究,较为详细地分析了炉料在炉喉料面上分布与等高度布料之间的机理关系,认为无料钟炉顶采用倾角跳变布料制和螺旋布料制是可以近似实现等高度布料、使煤气流趋向均匀分布的一种重要的手段。本文推导和建立了三种等高度布料时炉料在炉喉料面上落料轨迹的数学模型(倾角跳变布料一种、螺旋布料二种)和有关数据,对开发无料钟炉顶布料技术有一定的指导意义。     

激光技术在无钟炉顶布料和料面监测中的应用

对于高炉布料操作,使用现有技术、难以准确分析高炉冶炼过程。激光技术作为一种非接触、高精度、快速有效测试手段,越来越被冶金行业重视。结合对多座无钟炉顶高炉布料过程的实际测试,开发了激光在高炉受料罐内料面测量,气密箱的监视,溜槽倾角的测量,以及料流轨迹和料面形状的测量方面的应用技术,为激光技术在高炉布料上的应用推广奠定基础。     

数字化布料技术在长江钢铁3号高炉的应用

长江钢铁新建3号高炉开炉装料过程中,采用了激光检测技术,根据料流宽度、料流轨迹、料面形状、FCG曲线等重要布料参数,制定了较合理的开炉布料矩阵;高炉点火后,随着风量、批重及焦炭负荷的增加,依据实际炉况变化及布料仿真数学模型的计算结果,通过定量化的布料数据分析,实时有效地对布料矩阵进行了调整。与传统的借鉴经验及定性摸索方式开炉相比,数字化布料技术更有助于操作人员定量化掌握布料规律,实现高炉顺利达产。     

高炉布料数学模型的开发及应用

为研究炉料在炉内的分布,对武钢1号高炉在开炉前进行了料面测量,在获得的炉料堆积规律的基础上开发了高炉布料数学模型,利用开发的数学模型模拟炉料下落的轨迹,求解料面形状,计算炉料的O/C比分布,利用模型计算结果对不同布料矩阵的布料效果实行量化评估,结合高炉专家系统中有关煤气流分布的信息,可以及时对布料矩阵作出调整.     

马钢9号高炉无料钟炉顶多环布料生产实践

通过对马钢9号高炉料流轨迹的测定，找到了料线、布料挡位和溜槽倾角的关系，为高炉开炉后实现多环布料提供了理论依据。9号高炉的生产实践表明，350m^3级高炉无料钟炉顶，同样可以实现多环布料，并取得较好效果。     

首钢京唐5500m~3高炉炉顶1:1布料试验

对首钢京唐5500m~3高炉炉顶1:1布料试验进行了总结。采用激光网格和图像采集的方法,得到了料流轨迹的实测数据。试验结果验证了首钢炉顶技术的可靠性,有力支撑了高炉实际生产操作。     

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.