攀钢2号高炉在低风温条件下的操作实践

1 前言 攀钢2号高炉(1200m~3)为钟式炉顶,配有3座内燃式热风炉,加热面积为81m~2/m~3。炉役后期,热风炉格砖孔堵塞严重,燃烧煤气量明显下降,风温下降,1997年2月风温仅能达到820℃。为减小热风炉检修工期对高炉生产的影响,提前检修1座热     

本钢二铁内燃式热风炉改为外燃式的设计

1 概述 本钢3号高炉始建于1941年,炉容758 m~3,1956～1972年炉容为917 m~3,1972年改造成 1070 m~3一直至今。热风炉为内燃式,随着高炉的扩容,为了增加蓄热面积,1、2、3号热风炉先后于1972年 6、7月和 1975     

我们是如何提高风温的?

随着冶金工业的发展,高风温已是降低焦比,提高产量的重要措施之一,特别是喷吹烧料在高炉生产中广范应用之后,迫切要求热风炉提供更高的风温。原来我们厂热风温度较低,只有800—900℃左右,远不能满足高炉生产的需要。为了提高风温,我们作了以下几项工作:1.改革了设备,增加热风炉的蓄热面积。我们高炉及热风炉原来是从马鞍山拆来的淘汰设备,热风炉原高18.93m,直径3.852m,每m~3高炉有效容积蓄热面积58.811m~2。由于蓄热面积小,风温始终提不高,平均风温在830℃左右,不能满足高炉大风高温的要     

杭钢1号高炉热风炉球顶钢壳喷涂保护层效果良好

杭钢1号高炉有效容积342m~3,配有3座外燃式热风炉,蓄热面积90.72m~2/m~3。1987年新建时,由武汉冶金建筑研究所对外燃式热风炉球顶炉壳喷涂了保护层。喷涂材料为该所与河南巩义市联合耐火材料厂生产的FN—130中重质耐火喷涂料,平均喷涂厚度为60～70mm。该喷涂工艺及使用材料取代了传统的硅藻土、石棉板、水渣等低温、低强、松散的热风炉顶部隔热结构,从而克服了     

高效顶燃式热风炉在我厂的应用

我厂在将30m~3高炉扩容为55m~3的改造工程中,通过对球式热风炉和高效顶燃式热风炉利弊的比较,最后决定把原内燃二通式热风炉改造为高效顶燃式热风炉,取得了较好的效果.1.结构特征热风炉利用旧炉壳,去掉半球顶,另加大盖帽锥形拱顶。拱顶砖衬座落在焊接于炉     

热风炉预热助燃空气的初步实践

一、概况我厂5~#高炉建于1958年,容积为100m~3,1980年5月在第二代停炉大修时进行了必要的技术改造。通过改造使它在全国同类型高炉中具有较高的装备水平。而“预热”就是其中的一项。在对热风炉改造时,根据济铁经验和为适应“预热”要求。我们采取了如下施措:1.增加热风炉的高度。并将平板砖改成五孔砖,格孔也由原80×8mm 改为58×58mm。蓄热面积由原56.3m~2/m~3增加到87.8m~2/m~3。     

水冶钢铁厂建成两座ZSD型高温热风炉

濮阳市水冶钢铁厂2号高炉原为28m~3,于1987年扩容为50m~3,但热风炉没有改造,风温只有550～600℃,因此焦比高,成本高,产量低,亏损严重,被迫于1990年1月停炉,对热风炉进行改造.通过多方案比较,最后决定建造ZSD型热风炉. ZSD型热风炉是一种新型高温热风炉(已取得两项发明专利权),它具有如下特点:①在热风炉直径、蓄热室高度和格子砖     

用低热值高炉煤气获得高风温的可能性

通过理论计算,得出了各种热风炉系统用低热值高炉煤气获得高风温的可能性。以2000m~3高炉的热风炉为例,热风炉能力和经济效果的计算结果表明,我国独创的自身预热热风炉系统可以完全不用高热值气体燃料达到高风温,与其他热风炉系统相比,还可获得较好的经济效果。     

莱钢1880 m~3高炉热风炉烘炉实践

对莱钢1 880 m~3高炉热风炉烘炉设备及烘炉操作经验进行了总结。通过烘炉前充分的准备工作、制定合理烘炉曲线等措施,热风炉运行情况良好,达到烘炉预定目标,为硅砖热风炉烘炉提供了重要参考。     

2500m~3钒钛矿冶炼高炉使用高风温技术的研究

从热风炉能否提供高风温和高炉能否使用高风温两个方面进行分析,找出制约提高风温使用的因素。通过优化热风炉工作制度,改进热风炉燃烧器,调整高炉操作制度,达到2500m~3钒钛矿冶炼高炉提高保存风温,节能降耗的目的。     

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.     

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.     

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)