EXTENDING CAMPAIGN LIFE IN AN ALL‐ELECTRIC MELTER USING HIGH LEVELS OF COMMERCIAL CULLET

2021 ◽  
pp. 73-81
Author(s):  
Phillip Tucker ◽  
Donn Sederstrom
Keyword(s):  
Campaign Life

Campaign Life Extension of Blast Furnace Offgas System

2020 ◽  
Author(s):  
C. Lopes ◽  
C. Van der Woude ◽  
H. Ghorbani ◽  
J. Luiz de Oliveira ◽  
M. Al-Dojayli ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Life Extension ◽  
Campaign Life

The Study on the Bond Strength between Gunning Formed Lining and Surface of Stave with Anchors

2011 ◽  
Vol 295-297 ◽  
pp. 765-768
Author(s):  
Feng Cao ◽  
Guo Xiang Pan ◽  
Hai Feng Chen ◽  
Pei Song Tang
Keyword(s):  
Blast Furnace ◽  
Service Life ◽  
Bond Strength ◽  
Bonding Strength ◽  
Research Work ◽  
The Past ◽  
Furnace Campaign ◽  
Campaign Life ◽  
Brick Lining ◽  
Optimizing Design

To prolong blast furnace campaign life, a great deal of research work has been carried out on the structure of stave cooler in the past decades, which, in turn, produced favorable results. However, due to the different thermal expanding property of the metal stave from that of the brick lining, the latter is subjected to crack, slide and damage. To solve the problem, a new stave cooler has been developed in this paper. Thus, a certain amount of anchors were welded on the traditional stave cooler, the unshaped gunning material can be fixed by anchors and the whole-lining be formed by gunning. The results of thermal simulating indicates: the bonding strength between the surface of stave cooler with anchors and the gunning lining is much higher than that between the surface of traditional stave cooler and the brick lining. Consequently, the service life of blast furnace will be extended. The optimizing design of the anchor was also described in the paper.

Study on Thickness Control and Quantitative of Converter Lining

2013 ◽  
Vol 433-435 ◽  
pp. 2156-2163
Author(s):  
Hong Xin Zhao ◽  
Zhang Fu Yuan ◽  
Yan Wu ◽  
Yi Fang Pan ◽  
Shu Qing Li ◽  
...  
Keyword(s):  
Stability Control ◽  
Control Area ◽  
Economic Life ◽  
Converter Lining ◽  
Measuring Technique ◽  
Normal Operation ◽  
Stable Range ◽  
Late Period ◽  
Thickness Control ◽  
Campaign Life

The thickness control of lining is vital to the normal operation of converter. Vulnerable parts of the furnace would be found and repaired timely by applying thickness measuring technique by laser. According to the measured results, the load part of the facet of the converter is the weakest location of the lining in the early campaign life, while the section of the trunnion is the weakest in the middle campaign life. When it comes to the later stage of campaign, the erosion of lining is severe. In line with the quantification of erosion parts, the lining thickness range can be divided into three parts, which are safety smelting area, stability control area and dangerous area. The economic life of the furnace life, which is 20 to 23 thousand heats, can be maintained as the thinnest lining is still above the stable range when the campaign reaches mid-late period.

Numerical Investigation of Cooling Strategy for Reducing Blast Furnace Hearth Erosions

2005 ◽  
Author(s):  
Fang Yan ◽  
Chenn Q. Zhou ◽  
D. Huang ◽  
Pinakin Chaubal
Keyword(s):  
Blast Furnace ◽  
Metal Flow ◽  
Cooling Water ◽  
Hot Metal ◽  
Furnace Hearth ◽  
Cooling Water Temperature ◽  
Cooling Strategies ◽  
Temperature Distributions ◽  
Blast Furnace Hearth ◽  
Campaign Life

Hearth wearing is the key limit of a blast furnace campaign life. Hot metal flow pattern and temperature distributions are the two key variables to determine the rate and style of the hearth wearing. There are several strategies to control and reduce the hearth erosion, such as changing cooling water temperature and changing the heat transfer coefficient. In this paper, both cooling strategies are investigated using a comprehensive computational fluid dynamics (CFD) code, which was developed specifically for the simulation of blast furnace hearth. That program can predict the liquid flow patterns and temperature distributions of the hot metal as well as temperature profiles in the hearth refractory materials under different conditions. The results predicted by the CFD code were compared with actual industrial operation data. The cooling strategies are evaluated based on the energy analysis and effect on the hearth erosion.

Numerical Investigation on Cooling Strategies in a Commercial Blast Furnace Hearth

2004 ◽  
Author(s):  
Anil K. Patnala ◽  
Chenn Q. Zhou ◽  
Yongfu Zhao
Keyword(s):  
Blast Furnace ◽  
Cooling Water ◽  
Operating Conditions ◽  
Cfd Modeling ◽  
Dominant Factor ◽  
Furnace Hearth ◽  
Blast Furnace Hearth ◽  
Campaign Life ◽  
Parametric Effects ◽  
Flow Heat

A blast furnace is the predominant iron-producing process in the U.S. It is widely believed that the blast furnace hearth refractory is the most dominant factor affecting the campaign life of a blast furnace. The hearth, where the liquid metal is collected, is made of carbon bricks. Cooling water is normally applied to the outside wall of the hearth. Wear of the carbon refractory occurs primarily because of erosion, which is related to the operating conditions of the hearth, such as the liquid flow in the hearth and the heat duty to the walls. Evaluation of fluid flow, heat transfer, and erosion patterns in the hearth are critical to the extension of the campaign life of a blast furnace, leading to the increase of productivity and saving of costs significantly. Advanced computational fluid dynamics (CFD) modeling techniques make it possible for providing detailed information on furnace conditions and parametric effects on performance. In this research, the blast furnace No. 13 at U.S Steel has been simulated using a comprehensive CFD model. The model was validated using the temperatures measured by thermocouples in the wall refractories of the furnace. The effects of cooling water on the temperature distributions as well as erosion patterns were evaluated. The results provide useful information for the furnace operations.

Technology for prolonging campaign life of blast furnaces

1996 ◽  
Vol 93 (3) ◽  
pp. 379-389 ◽  
Author(s):  
T. Matsumoto ◽  
H. Marushima ◽  
H. Nishimura ◽  
K. Yanagisawa ◽  
N. Nishimura
Keyword(s):  
Blast Furnaces ◽  
Campaign Life

Computations of Liquid Flow and Heat Transfer in the Hearth of a Blast Furnace

2003 ◽  
Author(s):  
Steven Vernengo ◽  
Rade Milanovic ◽  
Chenn Q. Zhou ◽  
Pinakin Chaubal ◽  
D. Huang
Keyword(s):  
Blast Furnace ◽  
Liquid Iron ◽  
Cost Effective ◽  
Steel Mill ◽  
Iron And Steel ◽  
Flow And Heat Transfer ◽  
Steel Making ◽  
Campaign Life ◽  
Computational Fluid Dynamics Cfd ◽  
Economic Vitality

A blast furnace is a key facility in iron and steel making to convert iron oxides into liquid iron. The furnace campaign life is critical to the economic vitality of an integrated steel mill. The wearing of hearth refractories is widely recognized as the main limitation for a long campaign blast furnace life. Distribution of liquid iron flow and refractory temperatures have a significant influence on hearth wear. It is identified that the use of modern advanced techniques such as Computational Fluid Dynamics (CFD) provide the most cost effective solution to gauge the condition of the hearth and understand the reason for changes. In this research, a large commercial scale blast furnace hearth has been simulated using a comprehensive CFD model based on a simplified structure of deadman. The liquid iron flow pattern, temperature distribution in the liquid and the refractories, and the wearing profile in the hearth have been analyzed. A limited parametric study has also been performed. The results are promising and will be presented in the paper.

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