JPS54110904A - Isothermal combustion control for sintering machine - Google Patents

Abstract

PURPOSE: To raise yield and heat basic unit for DL type sintering machine by the procedure in which the reaction temperature of the sintering layer is kept at uniform optimum temperature throughout the layer by controlling the distribution of air introduced into the sintering layer.

CONSTITUTION: The raw material to be sintered is transferred from B to C and the air is introduced from above to below. The sintering reaction region G is present in the upper layer on the charging side B but is moved to the lower side toward the extraction side C. Accordingly, the air introduced passes through a thin sintering completion region and then quickly reaches the reaction region G, and thus the quantity of absorption heat is less on the charging side B but becomes greater gradually toward the extraction side C. To eliminate such a slant deviation, the following method is followed. The incoming heat quantity of air introduced is first obtained and on the other hand, the sintering reaction ratio to the progressing direction is obtained by the analysis of CO and CO₂ present in waste gas. The standard air amount predetermined by parameters as standards is corrected for distribution ratio which coincides with the aforesaid incoming heat quantity and reaction ratio to the progressing direction of the sintering layer and then the air is supplied dividedly onto the surface of the sintering layer. Then, according to the division, the waste gas regulation is made.

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