昆钢6号高炉提高风温的措施

昆钢6号高炉热风炉在全烧高炉煤气的情况下,能为高炉提供1 120 C的高风温.提高风温的主要措施有加强热风炉操作,使用快速烧炉法烧炉,加强设备维护,对设备进行改进,采用换热器对助燃空气和煤气进行预热等.     

昆钢6号高炉提高风温的措施

昆钢6号高炉热风炉在全烧高炉煤气的情况下，能为高炉提供1120℃的高风温。提高风温的主要措施有：加强热风炉操作，使用快速烧炉法烧炉，加强设备维护，对设备进行改进，采用换热器对助燃空气和煤气进行预热等。     

降低新钢11号高炉热风炉煤气消耗实践

热风炉是炼铁生产过程中的重要设备之一,热风炉供给高炉热风的热量约占炼铁生产耗热的四分之一,它消耗的高炉煤气占高炉产生煤气的40%以上,因此提高热风炉的热效率对降低能耗有很大意义。针对新钢11号高炉风温水平不足且煤气消耗过大的问题,采取了改造煤气预热器进口段冷排系统、增加高炉富氧率、修复煤气预热器、优化烧炉程序和烧炉制度等措施,不仅提高了风温,还降低了煤气消耗。     

绕子式列管换热器在5号热风炉的运用实践

高炉煤气是高炉的副产品之一,同时也是热风炉烧炉的主要燃料,热风炉烧炉产生的高温烟气通过换热器对高炉煤气和助燃空气进行预热,并且在烧炉时合理的控制空燃比,可以有效地减少高炉煤气的消耗,降低吨铁的成本,达到高产、优质、低耗、环保的目的。介绍了绕子式列管换热器在梅钢5号热风炉运用实践。     

邯钢东区3200m3高炉热风炉工艺改造实践

邯钢东区3200m3高炉通过对双预热系统“串改并”的改造与脱盐塔煤气净化系统的建设,大幅度提高了预热器的稳定性与使用寿命。通过引进TS3000自动烧炉系统提高煤气燃烧效果,充分利用邯钢富余氧气进行富氧烧炉,开发热风炉报警系统降低设备故障率,根据高炉风温水平与高炉煤气利用率优化转炉煤气使用,减少消耗等措施,实现了风温达到国内先进水平的同时大幅节约煤气用量的双赢目标。     

热风炉燃烧自动控制仪的研究

1 引言 济钢一铁厂共有350m~3高炉6座,配有19座热风炉,其中顶燃式热风炉6座,内燃式热风炉13座,全部为人工烧炉。由于高炉座数多,热风炉每小时6次的换炉对煤气管网压力造成频繁的波动,另外,管网上的用户较多、高炉不顺或休风也会引起系统煤气压力的频繁波动,从而给热风炉的烧炉带来很大的困难。为消除因煤气压力波动给烧炉带来的影响,1998年济钢一铁与闽东宏宇冶金     

新钢11~#高炉降低煤气消耗生产实践

新钢11~#高炉通过改造热风炉煤气预热器冷排、修正上料程序、改进皮带托辊更换制度、高炉富氧鼓风、修复预热器、半自动烧炉、改变烧炉方式等一系列技术措施,有效降低热风炉煤气消耗,提高了风温水平。     

1300℃高风温技术在首钢京唐公司5500m3高炉的应用

通过采取优化高炉煤气系统工艺流程、配置BSK顶燃式热风炉和预热炉、煤气和助燃空气双预热、强化高炉富氧操作和优化热风炉烧炉参数等措施,首钢京唐公司5500m^3高炉热风炉系统实现了在全烧高炉煤气的情况下为高炉提供1300℃风温的目标。同时,通过采取改善原料条件、提高顶压、稳定理论燃烧温度、加大矿批和规范炉内操作等措施,使高炉经济技术指标得到明显改善。     

旋流顶燃式热风炉的应用

对本钢内燃式热风炉改造为旋流顶燃式热风炉的实践进行了总结。在尽可能利用原设备、节省工程投资的情况下，改造后的热风炉在单烧高炉煤气时，平均人炉风温1065℃．取得了较好的经济效益。     

煤气稀释站技术在某新区1号高炉的应用

对煤气稀释站技术在某新区1号高炉的应用进行了总结。在新区高炉烘炉及热风炉烧炉方案上,主要有两种途径可供选择,即烘炉烧嘴法和煤气稀释站法,前者比较适合中小型高炉的烘炉和开炉,后者非常适合大型高炉的烘炉和开炉。重点阐述了煤气稀释站技术在某新区1号高炉设计、烘炉、开炉期间的应用和操作经验,为新建大型钢铁基地首座高炉烘炉、开炉过程中的热风炉烧炉操作,提供了安全、可靠的解决方案。     

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)