Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultra-light fibrous xonotlite type heat insulating material based on amorphous silicon in fly ash and preparation method of ultra-light fibrous xonotlite type heat insulating material
The invention discloses an ultra-light fibrous xonotlite type heat insulating material based on amorphous silicon in fly ash and a preparation method thereof. Amorphous silicon in fly ash is extracted through a high-temperature and high-pressure alkali dissolution method, fly ash silicon extraction liquid serves as a main siliceous raw material, lime milk serves as a main calcium raw material, a crystal growth promoting agent is added, and the ultra-light fibrous xonotlite heat insulating material is prepared through a dynamic hydrothermal synthesis process. Compared with a traditional process, the hydro-thermal synthesis temperature and synthesis time are remarkably reduced, energy consumption is remarkably reduced, all performance indexes of the prepared xonotlite heat insulating material are remarkably improved, and particularly, the density of the xonotlite heat insulating material is reduced by 50% or above compared with that of the traditional process and is only about 100 kg/m < 3 >, and the ultra-light level is achieved. Meanwhile, the NaOH solution used in the method can be recycled, the utilization value of the fly ash is greatly improved, and the method is an important way for realizing high-value utilization of the fly ash and has remarkable economic, environmental and social benefits.
本发明公开了一种基于粉煤灰中非晶态硅的超轻纤维状硬硅钙石型绝热材料及其方法。通过高温高压碱溶的办法提取粉煤灰中的非晶态硅，并以粉煤灰提硅液作为主要硅质原料，石灰乳作为主要钙质原料，并加入晶体促生剂，采用动态水热合成工艺制备超轻纤维状硬硅钙石绝热材料。与传统工艺相比本发明的水热合成温度和合成时间显著降低，能耗显著降低，且制备的硬硅钙石绝热材料的各项性能指标都有显著改善，尤其是其密度比传统工艺降低50％以上，仅为100kg/m3左右，达到超轻水平。同时本发明中所用NaOH溶液能够实现循环利用，并极大的提升粉煤灰的利用价值，是实现粉煤灰高值化利用的一条重要途径，具有显著的经济、环境和社会效益。
Ultra-light fibrous xonotlite type heat insulating material based on amorphous silicon in fly ash and preparation method of ultra-light fibrous xonotlite type heat insulating material
The invention discloses an ultra-light fibrous xonotlite type heat insulating material based on amorphous silicon in fly ash and a preparation method thereof. Amorphous silicon in fly ash is extracted through a high-temperature and high-pressure alkali dissolution method, fly ash silicon extraction liquid serves as a main siliceous raw material, lime milk serves as a main calcium raw material, a crystal growth promoting agent is added, and the ultra-light fibrous xonotlite heat insulating material is prepared through a dynamic hydrothermal synthesis process. Compared with a traditional process, the hydro-thermal synthesis temperature and synthesis time are remarkably reduced, energy consumption is remarkably reduced, all performance indexes of the prepared xonotlite heat insulating material are remarkably improved, and particularly, the density of the xonotlite heat insulating material is reduced by 50% or above compared with that of the traditional process and is only about 100 kg/m < 3 >, and the ultra-light level is achieved. Meanwhile, the NaOH solution used in the method can be recycled, the utilization value of the fly ash is greatly improved, and the method is an important way for realizing high-value utilization of the fly ash and has remarkable economic, environmental and social benefits.
本发明公开了一种基于粉煤灰中非晶态硅的超轻纤维状硬硅钙石型绝热材料及其方法。通过高温高压碱溶的办法提取粉煤灰中的非晶态硅，并以粉煤灰提硅液作为主要硅质原料，石灰乳作为主要钙质原料，并加入晶体促生剂，采用动态水热合成工艺制备超轻纤维状硬硅钙石绝热材料。与传统工艺相比本发明的水热合成温度和合成时间显著降低，能耗显著降低，且制备的硬硅钙石绝热材料的各项性能指标都有显著改善，尤其是其密度比传统工艺降低50％以上，仅为100kg/m3左右，达到超轻水平。同时本发明中所用NaOH溶液能够实现循环利用，并极大的提升粉煤灰的利用价值，是实现粉煤灰高值化利用的一条重要途径，具有显著的经济、环境和社会效益。
Ultra-light fibrous xonotlite type heat insulating material based on amorphous silicon in fly ash and preparation method of ultra-light fibrous xonotlite type heat insulating material
一种基于粉煤灰中非晶态硅的超轻纤维状硬硅钙石型绝热材料及其制备方法
YANG ZHIJIE (Autor:in) / YAN CHANGWANG (Autor:in) / KANG DONG (Autor:in) / ZHANG DE (Autor:in) / ZHANG JU (Autor:in)
17.09.2021
Patent
Elektronische Ressource
Chinesisch
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