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Preparation method and application of mineral powder-carbonized steel slag composite mineral admixture
The invention discloses a preparation method and application of a mineral powder-carbonized steel slag composite mineral admixture. The composite mineral admixture is prepared by taking steel slag and mineral powder as raw materials. The preparation method comprises the following steps: (1) crushing and grinding a steel slag block to obtain steel slag powder; (2) mixing and stirring the steel slag powder and water to obtain steel slag slurry, introducing carbon dioxide gas into the slurry, carbonizing for 15-120 minutes, and keeping the constant temperature within 20-50 DEG C during carbonization; (3) filtering and drying the carbonized slurry to obtain carbonized steel slag powder; and (4) uniformly mixing the carbonized steel slag powder and mineral powder according to a mass ratio of 1: 3 to obtain a finished product of the composite mineral admixture. After the composite mineral admixture is used for a cement product, the active aluminum phase in the mineral powder induces the nano calcium carbonate on the surface of the steel slag to be converted into carboaluminate, so that pores are refined, bonding among particles is enhanced, and the strength of the composite cement is remarkably improved. The composite admixture can replace 60% of cement, and the cement consumption and carbon emission are greatly reduced.
本发明公开了一种矿粉‑碳化钢渣复合矿物掺合料的制备方法及应用。所述复合矿物掺合料以钢渣和矿粉为原材料制成。制备方法包括以下步骤：(1)将钢渣块破碎并研磨，得到钢渣粉末；(2)将钢渣粉末和水混合搅拌得到钢渣浆体，并向浆体中通入二氧化碳气体碳化15‑120分钟，期间恒温在20‑50摄氏度内；(3)将碳化后的浆体过滤干燥，获得碳化钢渣粉末；(4)将碳化钢渣粉末与矿粉按照1：3的质量比混合均匀，得到复合矿物掺合料成品。当复合矿物掺合料用于水泥制品后，矿粉中的活性铝相诱导钢渣表面的纳米碳酸钙转变为碳铝酸盐，进而细化孔隙并增强颗粒间粘结，显著提高了复合水泥的强度。该复合掺合料可替代60％的水泥，极大地减少了水泥用量和碳排放。
Preparation method and application of mineral powder-carbonized steel slag composite mineral admixture
The invention discloses a preparation method and application of a mineral powder-carbonized steel slag composite mineral admixture. The composite mineral admixture is prepared by taking steel slag and mineral powder as raw materials. The preparation method comprises the following steps: (1) crushing and grinding a steel slag block to obtain steel slag powder; (2) mixing and stirring the steel slag powder and water to obtain steel slag slurry, introducing carbon dioxide gas into the slurry, carbonizing for 15-120 minutes, and keeping the constant temperature within 20-50 DEG C during carbonization; (3) filtering and drying the carbonized slurry to obtain carbonized steel slag powder; and (4) uniformly mixing the carbonized steel slag powder and mineral powder according to a mass ratio of 1: 3 to obtain a finished product of the composite mineral admixture. After the composite mineral admixture is used for a cement product, the active aluminum phase in the mineral powder induces the nano calcium carbonate on the surface of the steel slag to be converted into carboaluminate, so that pores are refined, bonding among particles is enhanced, and the strength of the composite cement is remarkably improved. The composite admixture can replace 60% of cement, and the cement consumption and carbon emission are greatly reduced.
本发明公开了一种矿粉‑碳化钢渣复合矿物掺合料的制备方法及应用。所述复合矿物掺合料以钢渣和矿粉为原材料制成。制备方法包括以下步骤：(1)将钢渣块破碎并研磨，得到钢渣粉末；(2)将钢渣粉末和水混合搅拌得到钢渣浆体，并向浆体中通入二氧化碳气体碳化15‑120分钟，期间恒温在20‑50摄氏度内；(3)将碳化后的浆体过滤干燥，获得碳化钢渣粉末；(4)将碳化钢渣粉末与矿粉按照1：3的质量比混合均匀，得到复合矿物掺合料成品。当复合矿物掺合料用于水泥制品后，矿粉中的活性铝相诱导钢渣表面的纳米碳酸钙转变为碳铝酸盐，进而细化孔隙并增强颗粒间粘结，显著提高了复合水泥的强度。该复合掺合料可替代60％的水泥，极大地减少了水泥用量和碳排放。
Preparation method and application of mineral powder-carbonized steel slag composite mineral admixture
一种矿粉-碳化钢渣复合矿物掺合料的制备方法及应用
LIN ZHONGCAI (author) / LI XINDUO (author) / SONG QIFENG (author) / LUO SHUANG (author)
2024-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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