ANÁLISE E IDENTIFICAÇÃO DO MODELO DINÂMICO DO PROCESSO DE COMBUSTÃO EM UM CALCINADOR INDUSTRIAL

Abstract

This work was developed at Hydro Alunorte's alumina refinery in Barcarena — PA, specifically in the calcination area. Calcination is the process by which all the free water or combined hydrate (Al₂O₃·3H₂O) is eliminated, forming aluminum oxide or simply alumina (Al₂O₃). This reaction requires heating in the combustion chamber with controlled temperature around 1000ºC, located within the stationary fluidized bed calciners. Inside the furnace, a combustion reaction takes place with HFO (Heavy Fuel Oil) as fuel and atmospheric air, which is captured via blowers. The main objective of this work is to identify a representative mathematical model for the combustion process that happens inside the furnace, to further optimize it, thus increasing the energy efficiency of the calciner oven.