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Magnesium slag carbon sequestration cementing material and preparation method thereof
The invention belongs to the technical field of solid waste resource recycling, and particularly discloses a magnesium slag carbon sequestration cementing material and a preparation method thereof. According to the magnesium slag carbon sequestration cementing material, reduced magnesium slag micro powder and biomass ash are adopted as main components, high-activity SiO2 in the biomass ash and Ca < 2 + > dissolved out of the magnesium slag micro powder are subjected to a pozzolanic reaction to generate C-S-H gel, and hydration of main mineral phases beta-C2S and gamma-C2S in magnesium slag is accelerated; the generated C-S-H gel can bond gamma-C2S crystal grains with almost no hydration activity in the magnesium slag micro powder, and more Ca < 2 + > is promoted to be leached to participate in the reaction by changing chemical equilibrium, so that the absorption amount of CO2 in the carbonization reaction process is increased. According to the magnesium slag carbon sequestration cementing material, the application problem that in the prior art, the hydration activity is low when magnesium slag is utilized is solved through the synergistic effect between the magnesium slag and the biomass ash, resource utilization of industrial magnesium smelting reducing slag solid waste, biomass ash solid waste and CO2 gas waste is achieved, and good social benefits and economic benefits are achieved.
本发明属于固体废弃物资源化回收利用技术领域，尤其公开了一种镁渣固碳胶凝材料以及其制备方法。该镁渣固碳胶凝材料采用还原镁渣微粉和生物质灰为主要组分，借助生物质灰中的高活性SiO2和镁渣微粉中溶出的Ca2+发生火山灰反应生成C‑S‑H凝胶，而加速镁渣中主要矿物相β‑C2S和γ‑C2S的水化；产生的C‑S‑H凝胶能够胶结镁渣微粉中几乎没有水化活性的γ‑C2S晶粒，通过改变化学平衡促使更多的Ca2+浸出参与反应，从而提高碳化反应过程中对CO2的吸收量。该镁渣固碳胶凝材料利用镁渣和生物质灰之间的协同效应克服了现有技术中利用镁渣时水化活性低的应用难题，且实现了对工业炼镁还原渣固废、生物质灰固废和CO2气废进行资源化利用，具有良好的社会效益和经济效益。
Magnesium slag carbon sequestration cementing material and preparation method thereof
The invention belongs to the technical field of solid waste resource recycling, and particularly discloses a magnesium slag carbon sequestration cementing material and a preparation method thereof. According to the magnesium slag carbon sequestration cementing material, reduced magnesium slag micro powder and biomass ash are adopted as main components, high-activity SiO2 in the biomass ash and Ca < 2 + > dissolved out of the magnesium slag micro powder are subjected to a pozzolanic reaction to generate C-S-H gel, and hydration of main mineral phases beta-C2S and gamma-C2S in magnesium slag is accelerated; the generated C-S-H gel can bond gamma-C2S crystal grains with almost no hydration activity in the magnesium slag micro powder, and more Ca < 2 + > is promoted to be leached to participate in the reaction by changing chemical equilibrium, so that the absorption amount of CO2 in the carbonization reaction process is increased. According to the magnesium slag carbon sequestration cementing material, the application problem that in the prior art, the hydration activity is low when magnesium slag is utilized is solved through the synergistic effect between the magnesium slag and the biomass ash, resource utilization of industrial magnesium smelting reducing slag solid waste, biomass ash solid waste and CO2 gas waste is achieved, and good social benefits and economic benefits are achieved.
本发明属于固体废弃物资源化回收利用技术领域，尤其公开了一种镁渣固碳胶凝材料以及其制备方法。该镁渣固碳胶凝材料采用还原镁渣微粉和生物质灰为主要组分，借助生物质灰中的高活性SiO2和镁渣微粉中溶出的Ca2+发生火山灰反应生成C‑S‑H凝胶，而加速镁渣中主要矿物相β‑C2S和γ‑C2S的水化；产生的C‑S‑H凝胶能够胶结镁渣微粉中几乎没有水化活性的γ‑C2S晶粒，通过改变化学平衡促使更多的Ca2+浸出参与反应，从而提高碳化反应过程中对CO2的吸收量。该镁渣固碳胶凝材料利用镁渣和生物质灰之间的协同效应克服了现有技术中利用镁渣时水化活性低的应用难题，且实现了对工业炼镁还原渣固废、生物质灰固废和CO2气废进行资源化利用，具有良好的社会效益和经济效益。
Magnesium slag carbon sequestration cementing material and preparation method thereof
一种镁渣固碳胶凝材料及其制备方法
WANG RUIXING (author) / BIAN SIYUAN (author) / YAN LENGFENG (author) / LU YUCAN (author) / QI XINYUAN (author)
2023-08-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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