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Reactivity and Conversion Behaviour of Brazilian and Imported Coals, Charcoal and Blends in view of their Injection into Blast Furnaces
Author(s) -
Machado J. G. M. S.,
Osório E.,
Vilela A. C. F.,
Babich A.,
Senk D.,
Gudenau H. W.
Publication year - 2010
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200900093
Subject(s) - charcoal , blast furnace , pulverized coal fired boiler , coal , raceway , combustion , reactivity (psychology) , waste management , carbon fibers , environmental science , metallurgy , materials science , engineering , chemistry , composite material , medicine , alternative medicine , organic chemistry , pathology , composite number , lubrication
For about 10 years the steel industry in Brazil has been using pulverized coal injection (PCI) technology in blast furnaces based on imported coals. In order to decrease the dependence on imported coals, Brazilian coal which has limited use due to high ash content is suggested to be mixed with imported coal and charcoal. The aim of this study is to examine the reactivity and combustion behaviour of the mentioned materials. The use of charcoal in the Brazilian steel industry reduces the CO 2 emissions, since it represents a renewable source of carbon. The reactivity of the coal, charcoal and mixtures is evaluated through TGA. To provide a useful insight into the practice of PCI in blast furnaces, experiments are carried out with a laboratory rig at RWTH Aachen University that simulates the behaviour of fines injected into the raceway. The results of this study are presented and discussed.