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Preparation method of fly ash ceramsite with high refractoriness
The invention provides a preparation method of fly ash ceramsite with high refractoriness, which comprises the following steps: removing impurities from a fly ash raw material, crushing, drying, testing components, regulating the components, adding a binder, balling, aging and sintering. According to the method, high fly ash proportion is guaranteed, mullite, corundum and other crystal phases are promoted to be formed in the ceramsite by additionally adding framework components such as an aluminum source and a silicon source, and a part of aluminum-silicon intermediate phase products still exist in the high-temperature reaction process while additional raw materials are reduced, so that the content of the aluminum-silicon intermediate phase products in the ceramsite is reduced. Under the condition that the aluminum-silicon co-melts have certain refractoriness, the low-melting-point molten impurities are wrapped to form island-shaped distribution, so that the melting phenomenon is avoided, and the ceramsite keeps good morphology. The fly ash ceramsite which can be used at high temperature and is low in heat conductivity and high in compressive strength is developed.
本发明提供了一种高耐火度粉煤灰陶粒的制备方法，将粉煤灰原料经除杂破碎烘干，测试成分并进行成分调控后，之后加入粘结剂进行成球、陈化、烧成。该方法在保证高粉煤灰占比的同时，通过外加铝源、硅源等骨架成分，在陶粒内部促进形成莫来石、刚玉等结晶相，该方法在减少外加原料的同时，高温反应过程中仍存在一部分铝硅中间相产物，这些铝硅共融物在本身具有一定耐火度的情况下，将低熔点熔融杂质包裹形成孤岛状分布，避免出现融出现象，使得陶粒保持良好的形貌。开发出可以在高温下使用、热导率低、抗压强度高的粉煤灰陶粒。
Preparation method of fly ash ceramsite with high refractoriness
The invention provides a preparation method of fly ash ceramsite with high refractoriness, which comprises the following steps: removing impurities from a fly ash raw material, crushing, drying, testing components, regulating the components, adding a binder, balling, aging and sintering. According to the method, high fly ash proportion is guaranteed, mullite, corundum and other crystal phases are promoted to be formed in the ceramsite by additionally adding framework components such as an aluminum source and a silicon source, and a part of aluminum-silicon intermediate phase products still exist in the high-temperature reaction process while additional raw materials are reduced, so that the content of the aluminum-silicon intermediate phase products in the ceramsite is reduced. Under the condition that the aluminum-silicon co-melts have certain refractoriness, the low-melting-point molten impurities are wrapped to form island-shaped distribution, so that the melting phenomenon is avoided, and the ceramsite keeps good morphology. The fly ash ceramsite which can be used at high temperature and is low in heat conductivity and high in compressive strength is developed.
本发明提供了一种高耐火度粉煤灰陶粒的制备方法，将粉煤灰原料经除杂破碎烘干，测试成分并进行成分调控后，之后加入粘结剂进行成球、陈化、烧成。该方法在保证高粉煤灰占比的同时，通过外加铝源、硅源等骨架成分，在陶粒内部促进形成莫来石、刚玉等结晶相，该方法在减少外加原料的同时，高温反应过程中仍存在一部分铝硅中间相产物，这些铝硅共融物在本身具有一定耐火度的情况下，将低熔点熔融杂质包裹形成孤岛状分布，避免出现融出现象，使得陶粒保持良好的形貌。开发出可以在高温下使用、热导率低、抗压强度高的粉煤灰陶粒。
Preparation method of fly ash ceramsite with high refractoriness
一种高耐火度粉煤灰陶粒的制备方法
YU HAOYANG (author) / WANG JIPING (author) / CAO JIANWEI (author) / DENG GUANNAN (author) / YIN HANG (author) / ZHANG YUNQI (author) / LUO XUERU (author) / ZHANG GUANGRUI (author) / LI LU (author) / KAN LIXIN (author)
2024-01-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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