首钢京唐1号高炉炉缸侧壁温度升高的护炉措施

对首钢京唐1号高炉炉缸侧壁温度升高后的护炉措施进行了总结。1号高炉炉役生产至10年之际,频繁发生局部炉缸炉衬热电偶温度升高的问题(TE31323上升至609℃),严重威胁安全生产。通过采取加钛矿护炉、强化冷却、调整布料制度、控制入炉碱金属、加强原燃料的管理等措施,炉缸侧壁高温点得以控制,保证了高炉安全生产,各项生产指标良好。     

安钢3号高炉增设炉底水冷装置的实践

1 概述 安钢3号高炉(300 m~3)于1992年6月投产,炉底采用高铝砖砌筑,自然冷却。1993年以来,高炉冶炼强度逐步提高,高炉强化生产使炉底温度持续升高,1994年10月上升到了838℃,炉底侵蚀严重,虽采取了加钒钛矿护炉等一系列措施,但炉底温度仍居高不下。为防止炉底烧穿,经过现场调查和理论     

新钢7号高炉护炉实践

1 前言 新钢7号高炉(600 m~3)自1993年10月开炉以来,由于冷却设施质量不过关,原燃料条件差,长期进行发展边缘的高炉操作,炉墙温度很高,炉壳局部发红,经常开裂。1995年9月发现炉缸冷却壁水温差超标,其中炉缸第二段9、10号已达9～11℃,第二段4号也在7～8℃范围内,严重威胁着高炉的正常生产。为了保证一代高炉的正常生产,防止炉     

邢钢4号高炉增设炉底水冷管的实践

4号高炉(300m~3)炉底采用高铝砖砌筑、自然冷却。但是,自1997年高炉进行强化冶炼、使用斜风口以来,炉底温度持续升高,增设炉底水冷管前,炉底温度已上升到778℃。为防止炉底烧穿,经过对现场调查及对安钢的考察,决定在4号高炉增设炉底水冷装置。 1 前期准备工作 1.1 炉底剩余厚度的计算 经查阅有关文献,并根据4号高炉实际     

本钢2号高炉护炉实践

2号高炉投产6年半后炉底温度升高至762℃，经过科学、正确诊断、明确炉底温升的症结所在危及安全生产的严重程度，制定了应急手段，采取了强化冷却等针对性护炉措施，成功地将炉底温度控制在700℃水平；研究与利用高炉操作制度，操作参数与炉底温升关系，控制炉底温度波动，改善高炉冶炼技术经济指标，实现计划安全停炉大修。     

安钢7号高炉炉底温度上升的治理实践

安钢7号高炉在2010年9月～11月期间,炉底温度持续升高,最高达到842℃,严重影响到高炉的安全生产和经济效益。通过采取炉底穿管加强炉底冷却,炉底灌浆封堵煤气跑窜等措施,解决了炉底温度升高的问题,并把炉底温度控制在合理范围内。     

酒钢1号高炉炉缸侧壁温度升高的治理

酒钢1号高炉炉缸侧壁北铁口、南铁口下方等处温度持续上升,点TE2507B最高达到923℃,威胁到安全生产.炉缸冷却壁与炭砖之间存在气隙、炉况较长时间存在异常、有害元素偏高、冶炼强度逐步增加是炉缸侧壁温度升高的主要原因.通过采取含钛炉料护炉、堵风口、优化高炉操作制度、灌浆及加强铁口维护等措施,炉缸侧壁温度上升趋势得到有效...     

湘钢1号高炉炉缸侧壁温度升高后的护炉措施

湘钢1号高炉大修投产后不到两年,1号铁口方向炉缸侧壁炭砖温度急速上升,最高升至740℃究其原因主要是铁口深度偏浅、长时间异常炉况、有害元素负荷偏高及冶炼强度偏高等。通过采取优化装料制度、提高风速和鼓风动能、调整冷却制度、添加钛球等护炉措施,炉缸侧壁炭砖温度得到控制、实践表明,单个护炉措施不会达到理想效果,需要多种护炉措施融合的综合护炉技术。     

日钢15号高炉长期经济护炉生产实践

日钢15号高炉“象脚区”炉缸碳砖温度于2016年5月异常升高,12月2日最高达到894℃,该区域炉缸耐材侵蚀严重,已威胁到高炉的安全生产。本文结合15号高炉实际生产状况,分析了“象脚区”炉缸侵蚀严重的原因,并真对炉缸侵蚀初期和恶化期提出了护炉措施。通过采取降低冶炼强度、增强冷却强度、缩小并加长风口、发展边缘气流等一系列措施,遏制住了“象脚区”碳砖温度升高趋势,之后通过创新性的消耗海砂球团护炉,实现了15号高炉连续、高效生产,取得了较好的经济效益。     

韶钢4#高炉炉役后期安全生产特点

韶钢4#高炉第一代炉役后期，炉身冷却壁大量损坏，炉缸部分冷却壁水温差超高，炉底、炉基温度达到安全警戒线，炉壳多处开裂变形，依靠外部打水维持生产的情况下，通过采取强化管理、加强高炉操作、炉体修补等措施，保证了高炉按计划安全停炉并创下投产以来的最好生产指标。     

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.