攀成钢4号高炉炉况失常的处理

随着富氧、喷煤等手段的运用,高炉不断强化,稳定的热制度和造渣制度显得尤为重要。并且随着高炉冷却强度不断提高,炉墙存在因局部冷却强度过大而产生结厚的危险。当炉温、炉况出现一定的波动后,如果操作不当,调剂手段过多,幅度过大,会导致煤气流分布失常,进而引发炉况失常。通过采用洗炉、合理料制调整、空料线炸瘤及抓管理等措施,炉况得到逐步恢复。     

韶钢7号高炉炉况失常的处理

韶钢7号高炉(2200m3)采用铜冷却壁、陶瓷杯、薄炉衬结构等先进技术。开炉1年后,由于原燃料质量变差、操作制度调整不及时、风口中套变形、风机频繁故障等原因,导致炉况失常。通过合理调整装料制度、改善原料质量,优化风口布局,狠抓管理等措施后,炉况逐步恢复正常。     

3号高炉(二代)炉墙结厚与操作炉型的管理

宝钢3号高炉(二代)炉体采用铜冷却壁,开炉两年后首次发生炉墙结厚,由于结厚处理时间长、炉况波动大,严重影响生产。分析认为,冷却壁镶砖的不均匀侵蚀是造成本次炉墙结厚处理困难的主要原因。对使用铜冷却壁的高炉在生产中如何控制操作炉型给出了建议。通过减少原料入炉粉末;稳定顺行,保持炉况稳定;防止边缘气流过重;提高软熔带位置;建立适宜的铜冷却壁冷却制度等可以防止炉墙结厚的发生。     

韶钢1号高炉优化高炉操作延长冷却壁寿命实践

通过对影响韶钢1号高炉冷却壁寿命因素的分析,采取调整风口、加大冷却强度、优化上下部操作制度和稳定热制度等措施,稳定了渣皮和炉况,遏制住了冷却壁频繁损坏的势头,2014年4月份后炉况顺行,冷却壁工作状态良好,未再继续烧损.     

鞍钢2580 m3高炉大批重操作实践

介绍了鞍钢11号高炉开炉后的炉况,包括高炉炉料结构和高炉冷却壁破损情况等,重点介绍了采用大批重布料制度后对炉顶温度、煤气流分布和炉体热负荷所带来的影响。生产实践表明,采用大批重布料制度后,煤气流分布合理,高炉一直稳定运行。     

钒钛矿高炉铜冷却壁破损诱发炉况失常的处理

分析了河钢承钢冶炼钒钛磁铁矿高炉炉况失常的原因,介绍了炉况恢复过程,并提出了预防措施。炉役后期,铜冷却壁长期漏水,造成操作炉型失常,出现炉墙结厚,是造成炉况恢复时间长的主要技术原因;在冷却壁漏水对炉况的影响程度上认识不足,是造成炉况恢复时间长的管理原因。从炉况恢复和巩固的过程中,到炉役后期应对铜冷却壁破损诱发炉况失常的一些关键:首先,对于炉墙粘结,要采取"集中加净焦、低碱度+萤石"方式进行热酸洗;另外,必须对冷却壁漏水进行彻底处理;转变对抑制边缘的认识,在加风和调整各项制度过程中,及时果断采取抑制边缘的装料制度,持续做好高炉炉役后期特护工作。     

韶钢1号高炉延长冷却壁寿命的措施

针对韶钢1号高炉冷却壁破损原因,采取了调整风口、加大冷却强度、优化上下部操作制度和稳定热制度等措施,稳定了渣皮和炉况,遏制住了冷却壁频繁破损的势头,冷却壁工作状态良好,炉况顺行。     

韶钢6号高炉炉役后期护炉生产实践

针对韶钢6号高炉炉役后期炉皮开裂、上部耐材基本脱落、冷却壁烧坏多块,出现炉况不顺、生产技术指标下滑的状况,通过提高原燃料筛分质量、操作制度的研究与调整、冷却壁检漏与修复、炉身上部喷涂及灌浆造衬等护炉措施,炉况顺行明显好转,主要技术经济指标得到大幅度改善。     

韶钢6号高炉炉役后期生产实践

韶钢6号高炉炉役后期炉皮开裂、上部耐材基本脱落、冷却壁烧坏多块,使炉况不顺,生产技术指标下滑;通过提高原燃料筛分质量、操作制度的研究与调整、冷却壁检漏与修复和炉身上部喷涂及灌浆造衬等措施,炉况顺行明显好转,主要技术经济指标得到大幅度改善.     

三安2号高炉延长冷却壁寿命实践

针对三安2号高炉冷却壁频繁烧损的原因分析,通过采取调整风口长度、养护冷却壁、优化上下部操作制度和稳定热制度等措施,稳定了渣皮和炉况,遏制住了冷却壁频繁损坏的势头,冷却壁工作状态良好,炉况稳定、顺行.     

1969 C.P.A. Institute.

Presents the program for the C.P.A. Institute entitled "The Role of Counseling Services on the Contemporary Campus." The Institute was held on June 2-3, 1969. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Laudatio: Prof. Dr. med. Dr. phil. Dres. h. c. Heinz H?fner

During the course of a year, there are many healthcare workers nationwide who sustain sharps injuries whilst carrying out their duties. Staff who work in the Accident and Emergency (A & E) units are no different from anyone else in this respect. The emotional cost of such an accident cannot be calculated, whereas the financial costs can. This article aims to show how the cost of an injury to a member of staff can be calculated, thus allowing a manager to assess the financial implications of sharps injuries to their department. In the absence of access to an Occupational Health (OH) department, most A & E units have to respond to sharps injuries to healthcare workers in the hospital. This task must be attended to by the medical staff as well as the nursing staff of the A & E unit. Within the following text the appropriate responses and methods to ensure uniformity of response are discussed. The tables and the calculation figures shown are taken directly from the information held in the St James's University Hospital Trust's OH department. All calculations are based on the middle band of the salary scale for each discipline. Accurate costings for each member of staff injured cannot be shown in this article, but the general principle is laid down and can be easily followed for any situation.     

Rats, Man . . .

Comments on the article by Richter entitled "Rats, Man, and the Welfare State" (see record 1960-02810-001). The commenter notes that in his article Richter did not indicate how hereditary and environmental factors were controlled. In comparing the hereditary survival characteristics of wild versus domesticated rats, it would be essential that the environmental influences on the survival characteristics of the wild rats should be ruled out. Another factor to be considered is that the wild state may offer a diet and other environmental influences, which in the life of a single individual would produce organic changes, accounting for some of the differences between wild and domestic rats. It would seem that the most effective way to determine the hereditary differences between wild and domestic rats would be to create a wild group, composed solely of the offspring of wild rats. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The blood-brain barrier. I. Histology. Physiology. Embryology. Transport

The concept of blood-brain barrier (bbb) arose in the beginning of the 20th century after report that the dyes injected intravenously did not appear in the brain. The idea and definition of bbb has been changed many times since then. We present current opinion concerning bbb, its histology, embryology, ultrastructure and function on the ground of a review of the recent literature.