Computational model for estimation of refractory wear and skull deposition in blast furnace hearth wall

2010 ◽  
Author(s):  
Abhinav Mithal ◽  
Toma Hentea
Keyword(s):  
Blast Furnace ◽  
Computational Model ◽  
Furnace Hearth ◽  
Refractory Wear ◽  
Blast Furnace Hearth

scholarly journals Estimation of Refractory Wear and Solidified Layer Distribution in the Blast Furnace Hearth and Its Application to the Operation

1987 ◽  
Vol 73 (15) ◽  
pp. 2068-2075 ◽  
Author(s):  
Fumiaki YOSHIKAWA ◽  
Seisuke NIGO ◽  
Shohzoh KIYOHARA ◽  
Seiji TAGUCHI ◽  
Hiromitsu TAKAHASHI ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Furnace Hearth ◽  
Refractory Wear ◽  
Blast Furnace Hearth

Experimental Cold Flow Water Model of a Blast Furnace Hearth: Part I

Volume 3 ◽  
2004 ◽  
Author(s):  
A. G. Agwu Nnanna ◽  
T. J. Mehok ◽  
D. Stella ◽  
Uludogan Ahmed ◽  
David Roldan ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Fluid Velocity ◽  
Flow Patterns ◽  
Water Model ◽  
Furnace Hearth ◽  
Refractory Wear ◽  
Cold Flow ◽  
Free Zone ◽  
Blast Furnace Hearth ◽  
Dead Man

An experimental investigation of the cold flow water model of the blast furnace hearth has been performed to examine the influence of dead man porosity and taphole height on the flow patterns in the hearth. The model is 1/10th-scale of Ispat blast furnace No. 7. This model satisfied both the geometrical and Froude number similarities of the prototype. Experimental simulations were performed for dead man structure with porosity of zero and 0.3, and for various taphole heights. Results show that there is a considerable influence of the porosity of the dead man structure and the taphole height on the flow contours within the coke free zone of the hearth. Furthermore, experimental evidence shows that the maximum fluid velocity occurred in the vicinity of the taphole, which is possibly the region of high refractory wear in the prototype. This information is useful to design engineers in the redesign and reline of a blast furnace to reduce refractory erosion and increase campaign life. A comparison between experimentally and CFD predicted flow patterns shows good agreement qualitatively without agreeing quantitatively. In the absence of measured flow data for blast furnace hearth, an experimental model is needed to validate either numerically or analytically predicted flow patterns.

A Model to Simulate Titanium Behavior in the Iron Blast Furnace Hearth

2010 ◽  
Vol 41 (4) ◽  
pp. 876-885 ◽  
Author(s):  
Bao-Yu Guo ◽  
Paul Zulli ◽  
Daniel Maldonado ◽  
Ai-Bing Yu
Keyword(s):  
Blast Furnace ◽  
Furnace Hearth ◽  
Blast Furnace Hearth ◽  
Iron Blast Furnace

scholarly journals Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 665 ◽  
Author(s):  
Ying Li ◽  
Lei Zan ◽  
Yao Ge ◽  
Han Wei ◽  
Zhenghao Zhang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Electromotive Force ◽  
Thermal State ◽  
Single Layer ◽  
Graphite Crucible ◽  
The State ◽  
Liquid Level ◽  
Double Layers ◽  
Furnace Hearth ◽  
Blast Furnace Hearth

The state of a blast furnace hearth, especially the liquid level of hot metal and slag during the tapping process, is of crucial importance with respect to a long campaign blast furnace. In practice, the state of the hearth is evaluated mainly by the experience of operators. In this paper, the electromotive force (EMF) is used to monitor the liquid level of a laboratory scale of blast furnace hearth and the effect of liquid level, EMF sensors position and the thickness of refractory on EMF signals are tested using a single layer of water and double layers of water and oil. After laboratory experiments, the electromotive force (EMF) is used to monitor the liquid level of torpedo ladle successfully. Laboratory experimental results show that the change in liquid level can be characterized by EMF signal. The state of liquid surface and local thermal state cause the EMF signal to vary in the circumferential direction of the vessel. Furthermore, the EMF signal magnitude decreases with the decrease of the thickness of the graphite crucible. Finally, the main conclusions of the laboratory experiment are supported by the torpedo ladle experiment.

scholarly journals Dissection Investigation of Ti(C,N) Behavior in Blast Furnace Hearth during Vanadium Titano-magnetite Smelting

2017 ◽  
Vol 57 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Kexin Jiao ◽  
Jianliang Zhang ◽  
Zhengjian Liu ◽  
Shibo Kuang ◽  
Yanxiang Liu
Keyword(s):  
Blast Furnace ◽  
Furnace Hearth ◽  
Blast Furnace Hearth

scholarly journals Properties and application of carbon composite brick for blast furnace hearth

2015 ◽  
Vol 51 (2) ◽  
pp. 143-151 ◽  
Author(s):  
K.X. Jiao ◽  
J.L. Zhang ◽  
Z.J. Liu ◽  
Y.G. Zhao ◽  
X.M. Hou
Keyword(s):  
Blast Furnace ◽  
Chemical Composition ◽  
Raw Materials ◽  
Protective Layer ◽  
Silicon Powder ◽  
Slag Layer ◽  
Carbon Composite ◽  
Carbon Layer ◽  
Furnace Hearth ◽  
Blast Furnace Hearth

A type of carbon composite brick was produced via the microporous technique using natural flack graphite, ?-Al2O3 and high-quality bauxite chamotte (Al2O3?87 mass%) as raw materials with fine silicon powder as additive. The composition and microstructure of the obtained carbon composite were characterized using chemical analysis, XRD and SEM with EDS. The high temperature properties of thermal conductivity, oxidization and corrosion by molten slag and hot metal of the composite were analyzed. Based on these, the type of carbon composite brick worked in a blast furnace hearth for six years was further sampled at different positions. The protective layer was found and its chemical composition and microscopic morphology were investigated. It is found that the carbon composite brick combines the good properties of both the conventional carbon block and ceramic cup refractory. The protective layer near the hot face consists of two separated sublayers, i.e. the slag layer and the carbon layer. A certain amount of slag phase is contained in the carbon layer, which is caused by the reaction of coke ash with the refractory. No obvious change in the chemical composition of the protective layer along the depth of the sidewall is found. This work provides a useful guidance for the extension of the lifetime of blast furnace hearths.

Sign in / Sign up

Export Citation Format

Share Document