Title:
METHOD AND SYSTEM FOR RECOVERING HEAT OF SLAG
Document Type and Number:
Japanese Patent JP2016102261
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a system for recovering heat of slag, in each of which the heat of slag can be recovered in high efficiency and high-quality solidified slag can be obtained.SOLUTION: When heat is recovered, in a heat recovery unit 15, from the molten slag M to be generated in a blast furnace, the molten slag M is solidified to obtain the solidified slag S of 5 mm or larger thickness, the obtained solidified slag S is charged into the heat recovery unit 15 to form a packed layer therein, and the heat is recovered. When the solidified slag S is charged into the heat recovery unit 15, a carbonaceous material C is charged while being mixed with the slag to form a mixture-packed part of the partially-solidified slag S with the carbonaceous material C in the upper part of the packed layer. Meanwhile, heat recovery gas containing at least one of carbon dioxide and water is sent to the packed layer of the heat recovery unit 15 at the gas velocity lower than the minimum fluidization start gas velocity Uof the packed layer so that the heat of the solidified slag S is recovered through the heat recovery gas Gand the carbonaceous material C is reformed into combustible gas.SELECTED DRAWING: Figure 1
Inventors:
SHIGAKI NOBUYUKI
MOGI YASUHIRO
OZAWA SUMIHITO
OGAWA NAOTAKA
MOGI YASUHIRO
OZAWA SUMIHITO
OGAWA NAOTAKA
Application Number:
JP2015219164A
Publication Date:
June 02, 2016
Filing Date:
November 09, 2015
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C21B3/06; C04B5/00; F27D15/02; F27D17/00
Domestic Patent References:
| JPS61175479A | 1986-08-07 | |||
| JP2013139596A | 2013-07-18 | |||
| JPS5688494A | 1981-07-17 | |||
| JPS62182139A | 1987-08-10 | |||
| JPS5489355U | 1979-06-25 | |||
| JP2009126747A | 2009-06-11 | |||
| JPH0913106A | 1997-01-14 |
Attorney, Agent or Firm:
Kenji Sugimura
Keisuke Kawahara
Keisuke Kawahara