Resumo A fim de investigar o consumo de biomassas, estudou-se sua participação na mistura base utilizada para a produção de Coque Metalúrgico, substituindo-a em 2% e 5% por madeira e serragem.Foram realizados enfornamentosem duplicata na unidade piloto de coque da Gerdau Ouro Branco com a caracterização de ensaios de reatividade (CRI), resistência após reação com CO 2 (CSR), Drum index (DI) e granulometria do coque produzido. A inserção da madeira mostrou-se mais viável do que a adição do mesmo nível de serragem. Para a participação de 2% de biomassa de madeira,os parâmetros metalúrgicos CSR e CRI apresentaram queda de 2,4pp (pontos percentuais) eaumento de 0,51pp respectivamente, apresentando também uma redução de 2,34pp no DI, 3,55pp no rendimento do coque para alto forno e redução singela de 0,03pp em porcentagem de enxofre.
The present research is dedicated to analyzing the addition of sawdust biomass, which is a carbonaceous raw material that may be used in coal blends for the production of metallurgical coke, preserving the required quality, with lower cost. The quality of metallurgical coke may be determined by the efficiency of its chemical, physical and thermal functions inside the blast furnace. For the production of hot metal, any modification in the constituents of the raw materials may have a direct influence on the blast furnace productivity and in the final quality of steel. From the thermal degradation analyzes such as coke reactivity index (CRI) and coke strength reaction (CSR), cold resistance (DI) and immediate analyzes, it may define the quality of metallurgical coke produced with biomass aiming at relating the parameters that interfere in the particularities of the material function in the blast furnace. Some results show that it is possible to use 2% of eucalyptus sawdust in the coal mixture.
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