Title:
セメント材料を得るための鉄鋼工業スラグの酸化処理方法
Document Type and Number:
Japanese Patent JP4102668
Kind Code:
B2
Abstract:
A method for treating a raw steel plant slag to transform it into a hydraulic binder at least equivalent to a Portland cement clinker, comprises the following steps: oxidizing treatment with input of oxygen, air or a mixture thereof at a pressure ranging between 1 to 15 bars, at a temperature ranging between 1650 and 1400° C., of raw steel slag containing, relative to the raw slag total weight, at least 45 wt. % of CaO and less than 30 wt. % of Fe2O3; and adding to the slag a lime source optionally with silica and/or alumina, so that the slag, after tranformation and at room temperature, has a propotion of Fe2O3 of less than 13 wt. % and a mineralogical composition comprising at least 40 wt. % in C3S mineralogical phase and more than 10 wt. %, of calcium ferrite, relative to the final slag total weight.
Inventors:
Michaud Poupardin Valerie
Solrantino Francois
Solrantino Francois
Application Number:
JP2002562686A
Publication Date:
June 18, 2008
Filing Date:
February 01, 2002
Export Citation:
Assignee:
Lafarju
International Classes:
C04B5/06; C04B7/153; C04B7/17; C04B7/21; C04B18/14; C21C1/02; C21C5/28; F27D15/00
Domestic Patent References:
| JP5010314A | ||||
| JP5734223B1 | ||||
| JP62241850A | ||||
| JP3503629A | ||||
| JP2000313907A | ||||
| JP2003534225A |
Attorney, Agent or Firm:
Takiguchi Shoji
Koichi Nakazato
Hitoshi Kawasaki
Koichi Nakazato
Hitoshi Kawasaki