Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing cement admixture by activating coal gangue powder at low temperature
The invention discloses a method for preparing a cement admixture by activating coal gangue at a low temperature, the research belongs to the field of comprehensive utilization of solid wastes, and the method is mainly characterized in that metakaolin is prepared by thermally activating coal gangue through chemical assistance, active Al2O3 and SiO2 are provided in a cement hydration process to improve the microstructure of cement, and the mechanical properties of engineering materials such as cement and the like are improved. The preparation method comprises the following steps: crushing and grinding coal gangue, adding a small amount of chemical additive, calcining in a muffle furnace, and preserving heat to finally obtain the activated coal gangue cement admixture. The invention has the following beneficial effects: (1) the main body of the used material is coal gangue, and high-valued utilization of coal-based solid waste can be realized; (2) the preparation method adopts a simple mechanical-chemical auxiliary thermal activation method, the cost is low, and the operation is simple; and (3) coal gangue activation is adjusted through the particle size and the temperature, the performance regulation and control of the activated coal gangue cement admixture can be realized, the consumption of cement clinker can be reduced through the introduction of the coal gangue, meanwhile, the energy consumption in the firing process is reduced, and the purpose of effectively utilizing carbonaceous substances in the coal gangue is achieved.
本发明公开了一种低温活化煤矸石制备水泥掺合料的方法，该研究属于固废综合利用领域，主要是通过化学辅助热活化煤矸石制备偏高岭土在水泥水化过程中提供活性Al2O3和SiO2改善水泥微观结构，提高水泥等工程材料的力学性能。所述制备方法包括：将煤矸石破碎粉磨，添加少量化学外加剂后，将期置于马弗炉中煅烧保温，最后得到活化煤矸石水泥掺合料。本发明的有益效果如下：(1)所用材料主体为煤矸石，可实现煤基固废的高值化利用；(2)制备方法采用简单的机械‑化学辅助热活化法，成本较低，操作简单；(3)通过粒度、温度对煤矸石活化进行调节，可实现活化煤矸石水泥掺合料的性能调控，且煤矸石的引入可减少水泥熟料的消耗，同时减少了烧制过程的能源消耗，达到有效利用煤矸石中碳质的目的。
Method for preparing cement admixture by activating coal gangue powder at low temperature
The invention discloses a method for preparing a cement admixture by activating coal gangue at a low temperature, the research belongs to the field of comprehensive utilization of solid wastes, and the method is mainly characterized in that metakaolin is prepared by thermally activating coal gangue through chemical assistance, active Al2O3 and SiO2 are provided in a cement hydration process to improve the microstructure of cement, and the mechanical properties of engineering materials such as cement and the like are improved. The preparation method comprises the following steps: crushing and grinding coal gangue, adding a small amount of chemical additive, calcining in a muffle furnace, and preserving heat to finally obtain the activated coal gangue cement admixture. The invention has the following beneficial effects: (1) the main body of the used material is coal gangue, and high-valued utilization of coal-based solid waste can be realized; (2) the preparation method adopts a simple mechanical-chemical auxiliary thermal activation method, the cost is low, and the operation is simple; and (3) coal gangue activation is adjusted through the particle size and the temperature, the performance regulation and control of the activated coal gangue cement admixture can be realized, the consumption of cement clinker can be reduced through the introduction of the coal gangue, meanwhile, the energy consumption in the firing process is reduced, and the purpose of effectively utilizing carbonaceous substances in the coal gangue is achieved.
本发明公开了一种低温活化煤矸石制备水泥掺合料的方法，该研究属于固废综合利用领域，主要是通过化学辅助热活化煤矸石制备偏高岭土在水泥水化过程中提供活性Al2O3和SiO2改善水泥微观结构，提高水泥等工程材料的力学性能。所述制备方法包括：将煤矸石破碎粉磨，添加少量化学外加剂后，将期置于马弗炉中煅烧保温，最后得到活化煤矸石水泥掺合料。本发明的有益效果如下：(1)所用材料主体为煤矸石，可实现煤基固废的高值化利用；(2)制备方法采用简单的机械‑化学辅助热活化法，成本较低，操作简单；(3)通过粒度、温度对煤矸石活化进行调节，可实现活化煤矸石水泥掺合料的性能调控，且煤矸石的引入可减少水泥熟料的消耗，同时减少了烧制过程的能源消耗，达到有效利用煤矸石中碳质的目的。
Method for preparing cement admixture by activating coal gangue powder at low temperature
一种低温活化煤矸石粉体制备水泥掺合料的方法
LI CHUNQUAN (Autor:in) / SUN ZHIMING (Autor:in) / QIAN LONG (Autor:in)
14.06.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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