Document Type and Number:
Japanese Patent JP4676829
Kind Code:
B2
Abstract:
To provide a treating method of steelmaking slag enabling a highly productive stabilizing treatment of steelmaking slag at a low treating cost, and capable of reducing the amount of CO2emission.
In a treating method of steelmaking slag in which CaO in the steelmaking slag is carbonated by supplying CO2gas while mechanically stirring the steelmaking slag, the steelmaking slag is stirred under a condition wherein particles having a diameter of 10-40 mm are contained in the slag, and the space filling rate η to the stirring vessel is set at 0.03-0.15 to achieve high productivity. Further, η, a vessel diameter D, a number of rotation ω, a water content M, a free lime concentration before the treatment, and a target free lime concentration after the treatment are specified. Further, it has become possible to specify the relation between D and ω, from a target value of the treatment productivity Q, a free lime concentration before the treatment, and a target free lime concentration after the treatment.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
Susumu Tsunekawa
Tomoaki Tasaki
Yoshiyuki Ueshima
Katsumi Amada
Application Number:
JP2005203275A
Publication Date:
April 27, 2011
Filing Date:
July 12, 2005
Assignee:
Nippon Steel Corporation
International Classes:
C04B5/00
Domestic Patent References:
| JP4016533A | | | | |
| JP62158145A | | | | |
| JP11292659A | | | | |
| JP61256950A | | | | |
| JP6092696A | | | | |
| JP61146745A | | | | |
| JP2005200234A | | | | |
Attorney, Agent or Firm:
Tatsuo Watanuki
Fumio Yamamoto
