A Predictive Model for the Anisotropy Index of Semi-Coke Derived from the Properties of Colombia's Eastern Cordillera Coals
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Keywords
Coal, coke anisotropy quotient, semi-coke, principal component analysis, textural component, Colombia Eastern Cordillera
Abstract
This study developed a theoretical model for the determination of the Coke Anisotropy Quotient (CAQ) of semi-coke from the properties of its precursor coal. This is an useful parameter to define the resistance and reactivity of semi-coke in the blast furnace. For 36 semi-coke samples, a textural analysis was performed alongside a fluidity test to determine the real CAQ. The main textures observed were: isotropic and circular for high volatile bituminous coals (HVB); lenticular and fine ribbons for the medium volatile bituminous coals (MVB); and medium and thick ribbons for the low volatile bituminous coals (LVB). The CAQ varied in a range from 1 to 11. A principal component analysis (PCA) and multiple regression allowed to discriminated the importance of certain coal properties, in determining the CAQ to be recognized and to estimate parameters of the mathematical model. The statistical analysis suggested that CAQ can be best predicted from the fluidity, volatile matter, and Ro of the parent coals. The veracity of this model result was then tested using a second dataset from Poland. This work optimizes the usefulness of standard datasets in the prediction of CAQ's offering a means of quality control that could be implemented in Colombian coke production.
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Article Details
Eliana Romero-Salcedo, Universidad Pedagógica y Tecnológica de Colombia
Eliana Gisell Romero-Salcedo is a Geological Engineer from the Universidad Pedagógica y Tecnológica de Colombia. She has a master's degree in Earth Sciences from the same University and has significant experience in the area of coal mining.
Sandra Manosalva-Sánchez, Universidad Pedagógica y Tecnológica de Colombia
Dr. Sandra Manosalva is an expert in the area of igneous, sedimentary and metamorphic petrology. She is also an expert in the area of composition and thermal maturity of coals. She has been a professor at the Engineering Geology School of the UPTC for more than 20 years.
Wilson Naranjo-Merchán, Universidad Pedagógica y Tecnológica de Colombia
Wilson Enario Naranjo Merchán is a Geological Engineer from the Universidad Pedagógica y Tecnológica de Colombia (UPTC), has a specialization in environmental management from the UPTC, and a master's degree in geology from the Universidad Nacional de Colombia. He has worked in the oil industry, has experience as a field geologist, and is a professor of structural geology at the UPTC.
Oscar García-Cabrejo, Universidad Pedagógica y Tecnológica de Colombia
Oscar Garcia is a geologist graduated from the geosciences department of the National University of Colombia. He did his doctoral studies in the area of numerical modeling and hydrogeology at the University of Illinois, and is a professor at the Engineering Geology School of the UPTC.
Juan Gómez-Neita, Universidad Pedagógica y Tecnológica de Colombia
Juan Sebastián Gómez Neita is a graduate of the Engineering Geology School of the Universidad Pedagógica y Tecnológica de Colombia. He did his master studies at the University of Sao Paulo, Brazil. He has significant experience in the area of paleoenvironmental studies and coal formation.
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