Title:
排ガス処理方法
Document Type and Number:
Japanese Patent JP4804640
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To execute a reduction in an energy/utility unit requirement due to shortening of a refining time, a decrease in an oxidation loss of a valuable element such as iron, chromium or the like, an improvement in a refractory life and an increase in a production efficiency or the like by lowering a pressure loss in an exhaust gas treating unit and maintaining a vacuum degree in a refining furnace at a high level in a process for vacuum-refining a molten metal. SOLUTION: A method for treating the exhaust gas comprises the steps of cooling the exhaust gas generated from a vacuum degassing unit of the molten metal by two or more stages of coolers, branching a bypass duct 7 from a duct 2 between the first and second stage coolers, and connecting the duct 7 to the rear side of the final stage cooler or the duct after a dust collector. In this case, the first stage cooler is preferably of a water tube type, and the second stage cooler is preferably of a smoke tube type.
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Inventors:
Kosuke Yamashita
Tomoaki Tanaka
Tomoaki Tanaka
Application Number:
JP2001112202A
Publication Date:
November 02, 2011
Filing Date:
April 11, 2001
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B01D51/00; F27D17/00; F27D19/00
Domestic Patent References:
| JP57009844A | ||||
| JP10183232A | ||||
| JP9512858A | ||||
| JP3193115A | ||||
| JP59189029U | ||||
| JP2000227284A | ||||
| JP2000239731A | ||||
| JP6017115A |
Attorney, Agent or Firm:
Tomoyuki Yabuki
Tsugeko Shigeo
Tsugeko Shigeo