Continuous annealing furnace for steel strip, continuous annealing method, continuous galvanizing apparatus and method for manufacturing galvanized steel strip (as amended)
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United States of America Patent
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Mar 14, 2017
Grant Date -
May 21, 2015
app pub date -
May 20, 2013
filing date -
May 24, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a vertical annealing furnace, in which a heating zone and a soaking zone are communicated with each other in the upper part of the furnace, in which a part of the furnace other than the communicated parts is separated by a dividing wall, in which part of the furnace gas is suctioned into a refiner having a deoxidation device and a dehumidification device which is placed outside the furnace to decrease the dew point of the gas by removing oxygen and moisture from the gas and such that the resultant gas having a decreased dew point is returned into the furnace, in which a gas suction port into the refiner is located in the lower part of the connection part between the soaking zone and the cooling zone and in which one or more gas suction ports are located in the parts of the heating zone and/or the soaking zone outside of an area within 6 m in the vertical direction and 3 m in the longitudinal direction of the furnace from the steel strip entrance in the lower part of the heating zone.
First Claim
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International Classification(s)
- C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
- B05C:APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MAT....
- B05D:PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MAT....
- F27B:FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPE....
- F27D:DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, ....
- C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....
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