ISSN 2594-357X
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Abstract
Mathematical analysis of blast furnace processes has been tried at first by applying thermodynamics and then by kinetic and dynamic theory. Dissection analyses of industrial blast furnaces showed clearly non-uniform distribution of process variables, specifically existence of cohesive zone, which led to the development of multi-dimensional models. Continuum modeling has almost completed considering momentum, heat and mass transfer for reacting multi phase flow of gas, solids, liquids and fines. The continuum model has been applied to operation improvement or new technology development, for examples, low temperature operation of blast furnace, charcoal charging or pulverized charcoal injection, carbon composite iron ores and/or ferrocoke charging, hydrogen bearing materials like steam, natural gas and waste plastics or hydrogen injection operation. These technologies will be expected to be used in practical operations for reduction of CO2 emission. Recently, discrete element modeling has been applied to analyze detail behavior of packed particles, which provides useful information on solid motion in the lower part of the blast furnace. Some trials have been reported to combine CFD and DEM models in the simplified operations. The combined model has been used to simulate gas-solid particles countercurrent flow and the formation of raceway and deadman. In future, non-continuous motion of solid particles relating to slipping and hanging could be analyzed by the model.
Mathematical analysis of blast furnace processes has been tried at first by applying thermodynamics and then by kinetic and dynamic theory. Dissection analyses of industrial blast furnaces showed clearly non-uniform distribution of process variables, specifically existence of cohesive zone, which led to the development of multi-dimensional models. Continuum modeling has almost completed considering momentum, heat and mass transfer for reacting multi phase flow of gas, solids, liquids and fines. The continuum model has been applied to operation improvement or new technology development, for examples, low temperature operation of blast furnace, charcoal charging or pulverized charcoal injection, carbon composite iron ores and/or ferrocoke charging, hydrogen bearing materials like steam, natural gas and waste plastics or hydrogen injection operation. These technologies will be expected to be used in practical operations for reduction of CO2 emission. Recently, discrete element modeling has been applied to analyze detail behavior of packed particles, which provides useful information on solid motion in the lower part of the blast furnace. Some trials have been reported to combine CFD and DEM models in the simplified operations. The combined model has been used to simulate gas-solid particles countercurrent flow and the formation of raceway and deadman. In future, non-continuous motion of solid particles relating to slipping and hanging could be analyzed by the model.
Keywords
Ironmaking; Blast furnace; Mathematical model.
Ironmaking; Blast furnace; Mathematical model.
How to refer
Yagi., Jun-ichiro.
MATHEMATICAL MODEL OF BLAST FURNACE
Progress and Application to New Technology Development
,
p. 1660-1674.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22273
