Method for oxidizing treatment of steel plant slag to obtain cement-based materials
    1.
    发明授权
    Method for oxidizing treatment of steel plant slag to obtain cement-based materials 失效
    钢厂渣的氧化处理方法,以获得水泥基材料

    公开(公告)号:US06946014B2

    公开(公告)日:2005-09-20

    申请号:US10467024

    申请日:2002-02-01

    摘要: 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.

    摘要翻译: 一种用于处理生钢厂渣以将其转化成至少与波特兰水泥熟料相当的水硬性粘合剂的方法包括以下步骤:在1至15的压力范围内输入氧气,空气或其混合物进行氧化处理 在1650〜1400℃的温度范围内,生钢渣相对于原渣总重量至少为45重量%。 CaO的%和小于30wt。 %的Fe 2 O 3 3%; 以及任选地用二氧化硅和/或氧化铝将石灰源添加到炉渣中,使得炉渣在转化和室温后具有Fe 2 O 3 O 3 小于13wt。 %和包含至少40wt。%的矿物组合物。 在C 3 S矿物相中的%,超过10wt。 %的铁素体相对于最终的炉渣总重量。