ALLOYING FURNACE FOR HOT DIP ZINC COATING

PURPOSE:To control furnace pressure in the inlet of a furnace by changing the opening degree of a damper at the outlet side of an alloying furnace and the distance between static pressure pads at a direct firing heating zone and a strip. CONSTITUTION:In the alloying furnace for hot dip zinc coating,...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO MITSURU, AIBA MASAJI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To control furnace pressure in the inlet of a furnace by changing the opening degree of a damper at the outlet side of an alloying furnace and the distance between static pressure pads at a direct firing heating zone and a strip. CONSTITUTION:In the alloying furnace for hot dip zinc coating, (1) by the opening degree of the damper 13 arranged to a gas exhaust duct 11 at the outlet side of the furnace, the furnace pressure in the upper part of the furnace is controlled, and by changing the distance between the static pressure pads 8 arranged at the upper part of the direct firing heating zone 5 in the furnace and the strip, the furnace pressure in the inlet part of the furnace is controlled. (2) The furnace pressure gages 7 are arranged at the inlet and the outlet sides in the furnace, a device automatically controlling the opening degree of the gas exhaust duct damper and the distance between the static pressure pads 8 and the strip so as to make the indicated value of the furnace pressure gage the prescribed value, is provided. By this method, the static pressure at the upper and the lower parts in the alloying furnace can independently be controlled.