Tunnel kiln for use in rebaking carbonaceous moldings impregnated with tar, pitch or the like
AssigneeShinagawa Refractories Co., Ltd.
InventorsKiyoshi Naito, Akio Sukuya
Life of this patent
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Abstract
A tunnel kiln for use in rebaking carbonaceous moldings impregnated with tar, pitch or the like, consisting of a preheating zone, a baking zone and a cooling zone, which comprises providing arch shafts in the kiln ceiling, providing a plurality of gas recirculating devices communicating with said arch shafts and heating gas blow-in holes of the lower portion of side wall in the preheating zone and the baking zone, and further providing, above the heating gas passages or combustion chambers mounted on a number of connected kiln cars, muffles consisting of receiving plate, bottom plate, holder, cover having in its upper surface a number of tar gas discharge openings, and seal, which muffles accommodating said moldings to be rebaked.
Claims5
A tunnel kiln for use in rebaking carbonaceous moldings impregnated with tar, pitch or the like, said tunnel kiln including a preheating zone, a baking zone and a cooling zone;
- arch shafts provided in the kiln ceiling, heating gas blow-in holes at the lower portion of the kiln side wall, a plurality of gas recirculating devices for feeding gas from the arch shafts in said preheating zone and baking zone to said blow-in holes, a plurality of connected cars movably mounted in said kiln, each car including passage means serving both as heating gas passages and combustion chambers;
- a muffle mounted on each car for accommodating said moldings to be rebaked, said muffle being disposed above said passage means, said muffle comprising a bottom plate, a tar-receiving plate mounted in said bottom plate, a holder mounted in said tar-receiving plate for supporting the moldings to be rebaked, a cover supported on said bottom plate to thereby enclose said moldings, holder and tar-receiving plate, a seal disposed between said cover and said bottom plate, and a plurality of tar gas discharge openings provided in the upper surface of said cover.
Dependencies are inferred from the claim text.