Microstructure of Agglomerate Produced with Charcoal as Substitution Fuel

摘要

Worldwide laboratory research proves that replacement of coke breeze by solid biomass in the process of agglomeration is possible [1, 2, 3]. One possibility of solid biomass use is the charcoal. Literature indicates that coke breeze can be replaced by charcoal up to 40% based on calorific value [4]. This paper deals with the problems of coke breeze substitution by charcoal in laboratory conditions sintering and the impact of such substitution on the resulting agglomerate properties, i.e. microstructure. Agglomerate microstructure consists of mineralogical phases; hematite, magnetite, calcium and aluminium silico-ferrites, and silicates. Substituting coke breeze for charcoal up to 40% in the process of agglomeration, slight changes occur in the volume fractions of individual phases of the agglomerates. Volume fractions of agglomerate phases change significantly above 40% substitution by charcoal. Phase composition has an effect on the quality characteristics of the produced agglomerate. The amount of calcium and aluminum silico-ferrites influences the strength of the agglomerate [5].