Abstract

MONTERO GONGORA, Deynier; RAMIREZ MENDOZA, Mercedes; GILBERT HERNANDEZ, Amauris  and  CAMPOS PERDICES, Sergio. Mathematical modeling for postcombustion control in a nickel reduction oven. EAC [online]. 2015, vol.36, n.3, pp. 21-34. ISSN 1815-5928.

The experimental identification of the postcombustion subprocess in a multiple home furnace, destined for nickel reduction by the carbonate-ammonia was carried out. Several experiments at different operating points of the process were performed, taking into account its nonlinear nature and using a width modulated pseudo random binary sequence as excitation signal. As a result, it was obtained the approximate mathematical models of the concentration of monoxide carbon residual, the temperature in 4 and 6 households before changes in air flow corresponding to these homes and the variations in mineral flow as disturbing variable in the subprocess. The validation of the obtained models Output-Error, Auto Regressive Exogenous with input was made; which provided adjustments from 63 to 84 % and also an acceptable behavior of residues was observed. The models were used to design an algorithm for temperature control in 4 and 6 houses, which have a decisive influence on the stability of the oven temperature profile. MATLAB as tool calculation was used.

Keywords : experimental identification; postcombustion; reduction; identification system; mineral; control.

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