Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sulphoaluminate-magnesium aluminate spinel cementing material as well as preparation method, system and application thereof
The invention belongs to the technical field of resource recycling and advanced inorganic non-metallic materials, and particularly relates to a sulphoaluminate-magnesium aluminate spinel cementing material as well as a preparation method, a system and application thereof. The cementing material is mainly composed of tetracalcium sulphoaluminate, dicalcium silicate and magnesium aluminate spinel, and the mass fraction of the magnesium aluminate spinel is not less than 20%. According to the invention, denitrification, desalination and defluorination treatment are conducted on secondary aluminum ash by adopting oxygen-enriched calcination to obtain calcined aluminum ash, the calcined aluminum ash is mixed with desulfurized magnesium slag, dolomite tailings and carbide slag, and then calcining is carried out to obtain the product, wherein the oxygen-enriched calcination is an external heating type heating mode. The cementing material provided by the invention has the cement functions of quick hardening and early strength, has thermal shock resistance in large-volume pouring, and does not generate cracks at high temperature. Meanwhile, calcium carbide slag, a magnesium desulfurization by-product and the secondary aluminum ash can be converted into the high-valued special sulphoaluminate-magnesium aluminate spinel cementing material, so the production cost of the special cementing material is greatly reduced.
本发明属于资源循环利用和先进无机非金属材料技术领域，具体涉及硫铝酸盐‑镁铝尖晶石胶凝材料及制备方法、系统和应用。主要由硫铝酸四钙、硅酸二钙和镁铝尖晶石组成，镁铝尖晶石的质量分数不低于20％。采用富氧煅烧对二次铝灰进行脱氮、脱盐、脱氟处理获得煅烧铝灰，将煅烧铝灰与脱硫镁渣、白云石尾矿、电石渣混合后煅烧，即得；所述富氧煅烧为外热式的加热方式。本发明提供的胶凝材料兼具有快硬、早强的水泥功能，同时在大体积浇筑中具有抗热震性，在高温下无裂纹产生。同时本发明能够实现电石渣、镁法脱硫副产物、二次铝灰向高值化硫铝酸盐‑镁铝尖晶石特种胶凝材料转化，大大降低特种胶凝材料的生产成本。
Sulphoaluminate-magnesium aluminate spinel cementing material as well as preparation method, system and application thereof
The invention belongs to the technical field of resource recycling and advanced inorganic non-metallic materials, and particularly relates to a sulphoaluminate-magnesium aluminate spinel cementing material as well as a preparation method, a system and application thereof. The cementing material is mainly composed of tetracalcium sulphoaluminate, dicalcium silicate and magnesium aluminate spinel, and the mass fraction of the magnesium aluminate spinel is not less than 20%. According to the invention, denitrification, desalination and defluorination treatment are conducted on secondary aluminum ash by adopting oxygen-enriched calcination to obtain calcined aluminum ash, the calcined aluminum ash is mixed with desulfurized magnesium slag, dolomite tailings and carbide slag, and then calcining is carried out to obtain the product, wherein the oxygen-enriched calcination is an external heating type heating mode. The cementing material provided by the invention has the cement functions of quick hardening and early strength, has thermal shock resistance in large-volume pouring, and does not generate cracks at high temperature. Meanwhile, calcium carbide slag, a magnesium desulfurization by-product and the secondary aluminum ash can be converted into the high-valued special sulphoaluminate-magnesium aluminate spinel cementing material, so the production cost of the special cementing material is greatly reduced.
本发明属于资源循环利用和先进无机非金属材料技术领域，具体涉及硫铝酸盐‑镁铝尖晶石胶凝材料及制备方法、系统和应用。主要由硫铝酸四钙、硅酸二钙和镁铝尖晶石组成，镁铝尖晶石的质量分数不低于20％。采用富氧煅烧对二次铝灰进行脱氮、脱盐、脱氟处理获得煅烧铝灰，将煅烧铝灰与脱硫镁渣、白云石尾矿、电石渣混合后煅烧，即得；所述富氧煅烧为外热式的加热方式。本发明提供的胶凝材料兼具有快硬、早强的水泥功能，同时在大体积浇筑中具有抗热震性，在高温下无裂纹产生。同时本发明能够实现电石渣、镁法脱硫副产物、二次铝灰向高值化硫铝酸盐‑镁铝尖晶石特种胶凝材料转化，大大降低特种胶凝材料的生产成本。
Sulphoaluminate-magnesium aluminate spinel cementing material as well as preparation method, system and application thereof
硫铝酸盐-镁铝尖晶石胶凝材料及制备方法、系统和应用
REN CHANGZAI (Autor:in) / HUA DONGLIANG (Autor:in) / LI HUAN (Autor:in) / WANG WENLONG (Autor:in) / SHAN GUANGHE (Autor:in) / CHEN LEI (Autor:in)
10.12.2021
Patent
Elektronische Ressource
Chinesisch
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