| 摘要 |
<p>The invention concerns a method for treating raw steel plant slag to transform it into a hydraulic binder at least equivalent to Portland cement clinker, characterised in that it comprises the following steps: oxidizing treatment with input of oxygen, air or a mixture thereof at a pressure ranging between 1 and 15 bars, preferably between 5 and 10 bars, at a temperature ranging between 1650 and 1400 DEG C, preferably ranging between 1550 and 1450 DEG C not higher than 1.500 DEG C of raw steel plant 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 said slag a lime source completed if required with a silica and/or an alumina source, the proportions of lime source and optionally of silica and/or alumina source being selected so that the slag, after transformation and at room temperature, should have a proportion 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. %, preferably less than 40 wt. % of calcium ferrite in the form of C2F and/or C4F mineralogical phase, relative to the final slag total weight.</p> |
