Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
STEEL STRIP CONTINUOUS ANNEALING FURNACE, STEEL STRIP CONTINUOUS ANNEALING METHOD, CONTINUOUS HOT-DIP GALVANIZATION EQUIPMENT, AND PRODUCTION METHOD FOR HOT-DIP GALVANIZED STEEL STRIP
Document Type and Number:
WIPO Patent Application WO/2013/175757
Kind Code:
A1
Abstract:
Provided are a continuous annealing furnace and a steel strip continuous annealing method using this annealing furnace, with which the dew point of the atmosphere in the furnace can be rapidly reduced to a level suitable for steady operation, and with which a low-dew-point atmosphere in which problems such as the occurrence of pick-up defects and furnace wall damage are suppressed can be stably achieved. The steel strip continuous annealing furnace is characterized by being a vertical annealing furnace configured such that a portion of gas inside the furnace is sucked and introduced into a refiner which is provided outside the furnance and which has a deoxygenation device and a dehumidification device, moisture and oxygen in the gas are removed to reduce the dew point, and the gas having the dew point thereof reduced is returned to the inside of the furnace. The continuous annealing furnace is further characterized in that gas suction ports from the inside of the furnace to the refiner are provided to at least one place in the vicinity of a furnace entrance side, said vicinity spanning, from a steel strip introduction section of a heating zone lower part, a distance of 6m or less in the vertical direction and a distance of 3m or less in the furnace length direction.

Inventors:
TAKAHASHI HIDEYUKI (JP)
Application Number:
PCT/JP2013/003190
Publication Date:
November 28, 2013
Filing Date:
May 20, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/56; C21D1/26; C21D1/74; C21D1/76; C23C2/02; C23C2/06; C23C2/40; F27D7/04
Domestic Patent References:
WO2008099970A12008-08-21
WO2007043273A12007-04-19
Foreign References:
JPH09324210A1997-12-16
JP2003129125A2003-05-08
JP2011046988A2011-03-10
JP2567140B21996-12-25
JP2567130B21996-12-25
Other References:
See also references of EP 2857532A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, AND IMAG...

Next Patent: STEEL STRIP CONTINUOUS ANNEALING FURNACE, CONTINUOUS ANNEALING METHOD, CONTINUOUS HOT-DIP GALVANIZAT...