Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Burning-free and steaming-free tailing brick and preparation method thereof
The invention discloses a baking-free and steaming-free tailing brick and a preparation method thereof, the baking-free and steaming-free tailing brick is prepared from solid raw materials and an alkali activator, the solid raw materials comprise, by mass, 70-90% of iron tailing sand, 4% of silica fume and 6-26% of bauxite; the alkali activator is formed by mixing sodium silicate accounting for 23%-25% of the solid raw materials, sodium hydroxide accounting for 4%-6% of the solid raw materials and water accounting for 20%-22% of the solid raw materials. The iron tailings, the silica fume and the bauxite are used as raw materials, the mechanical property of the tailing brick is optimized through a method for adjusting the active silica-alumina ratio, the effect is remarkable, and the maximum unconfined compressive strength of the obtained tailing brick can reach 31.32 MPa. According to the preparation method, high-temperature sintering and autoclaving treatment are not needed, and energy consumption is low; in addition, due to the fact that the iron tailings, the silica fume and the bauxite are used as the raw materials, the harm of the solid waste to the environment can be effectively avoided, technical support is provided for regional environment co-treatment of bulk solid waste such as the tailings, and recycling and harmless treatment of the solid waste are achieved.
本发明公开了一种免烧免蒸尾矿砖及其制备方法，所述免烧免蒸尾矿砖由固体原料和碱激发剂制备而成，以质量100％计，固体原料包括：铁尾矿砂70％～90％、硅灰4％、铝矾土6％～26％；碱激发剂由占固体原料23％～25％的硅酸钠、4％～6％的氢氧化钠、20％～22％的水混合而成。本发明利用铁尾矿、硅灰、铝矾土作为原料，通过调节活性硅铝比方法优化尾矿砖的力学性能，且效果显著，所得尾矿砖无侧限抗压强度最高可达31.32MPa。本发明制备方法不需高温烧结和压蒸处理，能耗较低；另本发明因利用铁尾矿、硅灰、铝矾土作为原料，不仅能够有效解决固体废弃物对环境造成的危害，为尾矿等大宗固废区域环境协同处置提供了技术支持，实现了固体废弃物的资源化和无害化处理。
Burning-free and steaming-free tailing brick and preparation method thereof
The invention discloses a baking-free and steaming-free tailing brick and a preparation method thereof, the baking-free and steaming-free tailing brick is prepared from solid raw materials and an alkali activator, the solid raw materials comprise, by mass, 70-90% of iron tailing sand, 4% of silica fume and 6-26% of bauxite; the alkali activator is formed by mixing sodium silicate accounting for 23%-25% of the solid raw materials, sodium hydroxide accounting for 4%-6% of the solid raw materials and water accounting for 20%-22% of the solid raw materials. The iron tailings, the silica fume and the bauxite are used as raw materials, the mechanical property of the tailing brick is optimized through a method for adjusting the active silica-alumina ratio, the effect is remarkable, and the maximum unconfined compressive strength of the obtained tailing brick can reach 31.32 MPa. According to the preparation method, high-temperature sintering and autoclaving treatment are not needed, and energy consumption is low; in addition, due to the fact that the iron tailings, the silica fume and the bauxite are used as the raw materials, the harm of the solid waste to the environment can be effectively avoided, technical support is provided for regional environment co-treatment of bulk solid waste such as the tailings, and recycling and harmless treatment of the solid waste are achieved.
本发明公开了一种免烧免蒸尾矿砖及其制备方法，所述免烧免蒸尾矿砖由固体原料和碱激发剂制备而成，以质量100％计，固体原料包括：铁尾矿砂70％～90％、硅灰4％、铝矾土6％～26％；碱激发剂由占固体原料23％～25％的硅酸钠、4％～6％的氢氧化钠、20％～22％的水混合而成。本发明利用铁尾矿、硅灰、铝矾土作为原料，通过调节活性硅铝比方法优化尾矿砖的力学性能，且效果显著，所得尾矿砖无侧限抗压强度最高可达31.32MPa。本发明制备方法不需高温烧结和压蒸处理，能耗较低；另本发明因利用铁尾矿、硅灰、铝矾土作为原料，不仅能够有效解决固体废弃物对环境造成的危害，为尾矿等大宗固废区域环境协同处置提供了技术支持，实现了固体废弃物的资源化和无害化处理。
Burning-free and steaming-free tailing brick and preparation method thereof
一种免烧免蒸尾矿砖及其制备方法
YUE ZHENGBO (Autor:in) / ZHAO PENGCHENG (Autor:in) / WANG JIN (Autor:in) / ZHAN XINYUAN (Autor:in) / LU HONGYU (Autor:in)
22.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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