An investigation of the structure and reactivity of coals for injection during blast furnace ironmaking.
Published: 2006
Language: eng
Number of pages: 79
ISBN-13: 9780494213001
Description: For more efficient combustion of coal an understanding of the physical and chemical properties of char is required. In this study the effects of pyrolysis conditions on the chemical and physical properties of several North American coals were examined. Chars were prepared in conditions similar to those experienced in the blast furnace during pulverized coal injection. Amorphous fraction and average crystallite height were determined using a quantitative X-ray diffraction technique. Chemical reactivity was measured in terms of intrinsic reactivity. It can be concluded that coals most suitable for pulverized injection in the blast furnace will possess a specific chemical/physical profile as represented by the following parameters: a high and stable amorphous fraction of carbon during pyrolysis and a high reactivity. The effects of a chemical enhancer containing copper sulfate and boric acid were also examined and it is suggested that this addition lowered the ignition temperature and accelerated coal pyrolysis.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1630.

Thesis (M.A.Sc.)--University of Toronto, 2006.

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