Optimizing the tapping regime on a blast furnace operating at variable speed

The main factors that determine the uniformity with which smelting products are tapped from a blast furnace are the rate of accumulation of the products in the hearth and the tapping rate. The first parameter is in turn determined by the stability of the furnace’s operation and can vary significantly even over the course of 24 h. The second parameter is determined mainly by the condition of the iron notch, the maintenance it receives, any changes that occur in the diameter of the channel of the notch, and the quality of the materials used to form the notch. Recommendations are presented to optimize tapping of the smelting products.     

Automatic system for predicting the viscoplastic region in a blast furnace

A mathematical model to describe the region of the blast furnace in which the charge materials are in the viscoplastic state (VPR) has been constructed for a blast furnace at the West Siberian Metallurgical Combine. The furnace has a standard bell-and-hopper charging apparatus and movable top slabs. The results of studies that were conducted led to the development of an automated system to monitor the VPR in blast furnaces. The system allows furnace operators to form the required VPR profile in accordance with current objectives. It also allows them to make real-time determinations of the reasons for changes in the gas flow inside the furnace, that flow being affected mainly by the internal profile of the furnace and the location of the VPR. Ultimately, use of the system allows the operators to promptly take action to keep the charge distribution and gas flow optimum. __________ Translated from Metallurg, No. 2, pp. 32–34, February, 2006.     

高炉工程自动控制系统设计

从高炉自动控制系统的组成、应用功能层次、设计阶级及主要内容等几个方面对高炉工程自动控制系统的设计了进行了总结和介绍，对同行有一定的借鉴作用。     

高炉高风温问题的探讨

分析全国重点钢铁企业和首钢历年年均风温的变化,介绍了首钢近年提高高炉风温情况。分析了近年首钢各厂区高炉的年均风温,结合1 250℃以上月均风温的实例,说明迁钢2号高炉高风温实践是首钢高炉风温进步的主要标志。讨论了与高风温紧密关联的工艺流程、设备及材料、原燃料和高炉操作等问题。高风温是1项综合技术,与大喷煤、富氧等技术融为一体,才能充分发挥其节能作用。     

Forced blow-in of a blast furnace

Kommunarsk Metallurgical Combine. Institute of Ferrous Metallurgy. Translated from Metallurg, No. 11, p. 37, December, 1990     

高炉的合理鼓风速度

通过论述鼓风速度与风口回旋区长度的关系,提出了合理风速的概念,分析了合理风速的理论依据和影响因素,并进一步给出了判断风速是否合理的各种直观现象以及调节风速的有效方法。明确指出合理风速不是一个具体数值,而是一个合理的范围,根据高炉生产条件的变化而变化,确定合理风速需要足够时间的尝试与探索。实践证明,高炉只有在合理风速条件下生产才能保证炉缸的正常工作,才能实现高炉生产长期的稳定与顺行。     

长寿高炉炉缸保护层综合调控技术

 在高炉炉缸砖衬热面形成的稳定的保护层,将铁水与砖衬隔离开,避免直接接触,这是保证高炉炉缸长寿、延缓砖衬侵蚀的必要条件。为了研究高炉炉缸长寿的本质,首先通过高炉破损调查和解剖调研,分析了炉缸保护层的物相组成和显微结构,建立了高炉炉缸保护层类别体系。从保护层形成机制的角度将保护层分为富铁层、富渣层、富石墨碳层和富钛层。制定了高炉炉缸保护层综合调控技术路线,提出高炉炉缸保护层能否形成的关键在于合理控制炉缸耐火材料热面温度和铁水成分。最后明确,在高炉正常生产过程中,应从设计、铁水质量、生产操作等3个方面采取措施以促进保护层的有效形成。