Large-doping-amount fly ash cement and preparation method thereof

Abstract

The invention relates to a large-doping-amount fly ash cement, including fly ash, red mud, lime, cement clinker, plaster and additive. The invention further provides a preparation method of the large-doping-amount fly ash cement, including the steps of: drying and grinding the fly ash; drying the red mud and mixing and grinding the dried red mud with clinker; pulverizing the lime and the plaster; preparing the additive into solution; mixing the fly ash, red mud, lime, clinker, plaster and additive evenly; and then grinding to obtain the large-doping-amount fly ash cement. The invention not only solves the problem of large emission of fly ash and discharge of red mud, but also can provide a fly ash cement with large fly ash proportion, simple production process, low cost, high strength, good stability and less clinker.

Description

technical field

[0001] The invention relates to a cement and a preparation method thereof, in particular to a large-volume fly ash cement and a preparation method thereof. Background technique

[0002] Now with the implementation of the sustainable development strategy, the resources, energy and environmental problems of the cement industry have become the main factors restricting its development. Using less Portland cement clinker and using industrial waste as much as possible to produce cement is a topic with environmental protection significance and economic value.

[0003] Fly ash is one of the industrial wastes with the largest emission and stacking volume. The utilization rate in my country is less than 40%, and the rest can only be stacked in large-area storage yards, which not only pollutes the environment, but also takes up a lot of waste. land resource.

[0004] Red mud is the polluting waste slag discharged when the aluminum industry extracts alumina. Generally, ...

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