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New Developments for Powder Coal Injection into the Blast Furnaces

2004; Wiley; Volume: 75; Issue: 4 Linguagem: Inglês

10.1002/srin.200405950

1869-344X

Paulo Santos Assis, Cláudio Batista Vieira, Pedro José Nolasco Sobrinho,

Metal Extraction and Bioleaching

Experiments and results concerning Powder Coal Injection into blast furnaces are presented. A pilot plant, similar to a blast furnace tuyere, with a high thermal gradient, developed at Escola de Minas‐UFOP, Brazil, is described. Several tests have been performed in this pilot plant, using a mixture of three coals and preheating the coal, giving the following conclusions: preheating of coal and the mixture of more than two coals, not commonly practised by now, are appropriate for improving the combustion rate and thus enhancing the coal injection technique.