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MANUFACTURING METHOD OF FLY ASH WITH HIGH PERFORMANCE FOR LOW HEAT MIXING CEMENT

机译:低热掺量水泥高性能粉煤灰的制造方法

摘要

The present invention can improve the initial strength development of low-heat-mixing mixed cement while improving the low hydration heat development characteristics and durability by replacing fly ash, which is a raw material of low heat-generating mixed cement, with fly ash discharged from a circulating fluidized bed boiler, The present invention provides a production method capable of producing a high-performance fly ash for an effective low-heat-mixing mixed cement while overcoming disadvantages of an exothermic mixed cement. The method for producing fly ash for low heat-generating mixed cement according to an embodiment of the present invention includes: a pulverizing step of pulverizing fly ash discharged from a thermal power plant of a circulating fluidized bed combustion system using coal as a raw material to a predetermined powder; A partial digestion step in which water is added to the fly ash after the pulverization step to cause volume expansion; And a mixing step of mixing the fly ash having been subjected to the partial digestion step with the refinery so that the fly ash is contained in an amount of 5 to 25% by weight based on the total weight of the refined ash, and the refined ash is contained in an amount of 75 to 95% .
机译:本发明通过将飞灰(从低排放的水泥中排出)代替飞灰(其为低发热的混合水泥的原料),可以改善低热混合的水泥的初始强度发展,同时改善低水合的热发展特性和耐久性。本发明提供了一种生产方法,该方法能够生产用于有效的低热混合混合水泥的高性能粉煤灰,同时克服放热混合水泥的缺点。根据本发明的实施方式的用于低热产生的混合水泥的粉煤灰的生产方法包括:粉碎步骤,该步骤将以煤为原料的从循环流化床燃烧系统的热电厂排出的粉煤灰粉碎为煤。预定的粉末;部分消化步骤,其中在粉碎步骤后将水添加到粉煤灰中以引起体积膨胀;并且,将经过部分消化步骤的粉煤灰与精炼厂进行混合的混合步骤,使粉煤灰的含量相对于精炼灰渣的总重量为5〜25重量%。灰分含量为75%到95%。

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