METHOD AND INSTALLATION FOR APPLYING COATING ON METAL STRIP BY IMMERSING IT INTO MELT Russian patent published in 2009 - IPC C23C2/02 C23C2/40 

FIELD: metallurgy.

SUBSTANCE: metal strip is supplied through furnace and roller chamber to capacity with melt via opening in bottom zone of capacity around which there is created electromagnetic field to maintain melt in capacity. Different gas atmospheres are kept in the roller chamber in at least two separated from one another sections. Gas atmosphere in a successive in the direction of strip motion section of the roller chamber has lower share of hydrogen, than in the section of the roller chamber preceding the above said section; also the first in the direction of strip motion section of the roller chamber has gas atmosphere with share of hydrogen exceeding 5 vol.%, while the last in the direction of metal strip motion section of the roller chamber has gas atmosphere with share of hydrogen lower, than 5 vol.%. The installation for implementation of the method consists of a furnace, of the roller chamber adjacent to the furnace in the direction of metal strip motion, and of the capacity with melt; also there is the opening in the bottom zone of the capacity; the opening is intended to supply the strip to the capacity; further, the capacity consists of an electromagnetic inductor to hold melt in the capacity. At least one partition is located in the roller chamber; the partition separates at least two sections; in addition, each section of the roller chamber has at least one gas supply line for supplying gas of specific kind or composition into the section.

EFFECT: invention facilitates maintaining favorable gas composition in installation even at irregularity of process.

11 cl, 3 dwg