F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
39/34, 39/52
F27B 7/20 (2006.01) C22B 1/20 (2006.01) C22B 1/216 (2006.01) F27B 21/06 (2006.01)
Patent
CA 1079962
ABSTRACT OF THE DISCLOSURE Agglomerates are fired in a sintering apparatus of the type, in which the agglomerates during transport on a travelling grate in zones along said grate are pre-dried with substantially pure warm air passing upwardly through the grate and finally dried and heated with hot process gas passing downwardly through the grate, and in which the hot process gas is generated by combusting fuel while using, as secondary air of combustion, a? previously used to cool fired agglomerates. In order to reduce the quantity of gas contaminated during the firing process there is maintained in a sealing zone located between the pre-drying and final-drying zones and mechanically shielded thereaginst, by supplying air above the grate and removing air by suction from beneath said grate, pressures which are substantially equal to the pressure above the grate and the pressure beneath the grate respectively in the adjacent final-drying zone.
288531
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