Non-sintered brick based on flue gas desulfurization byproduct and preparation method thereof

Abstract

The invention relates to a non-sintered brick based on a flue gas desulfurization byproduct and a preparation method thereof. The brick is prepared by the following steps: desulfurated ash produced by desulfuration treatment on flue gas generated in a coal fired power plant is taken as a main material, cement, fly ash, gypsum and sand are taken as auxiliary materials, water is added into the main material and the auxiliary materials, the mixture is evenly stirred and then is subject to compression moulding to obtain the brick, wherein the solid raw materials contain the following components by weight percent: 30-35% of the desulfurated ash, 10-15% of the cement, 5-10% of the fly ash, 3-5% of the gypsum and 40-50% of the sand; and the adding amount of the water accounts for 10-12% of the total weight of the solid raw materials. Because the brick takes the desulfurated ash as the raw material instead of solid clay, and natural resources are not used or used as little as possible, which avoids the damage on land resources owing to taking clay and reduces secondary pollution of the desulfurated ash. The preparation method comprises the steps of taking raw materials, mixing the raw materials, carrying out compression moulding and carrying out later-period consevation. The brick is not subject to high temperature sintering treatment, thus energy consumption is greatly reduced, and the protection and the improvement on ecological environment can be achieved more easily. Tests indicate that the non-sintered brick has strength grade greater than or equal to MU 10 grade, and can fully replace the traditional solid clay brick.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a non-sintered brick based on by-products of flue gas desulfurization and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economy, the sharp increase of industrial solid waste that has not been utilized as secondary resources not only occupies a large amount of land resources and causes many secondary pollution problems, but also is a waste of resources. Increasing demands for environmental protection and economic policies to achieve sustainable development are not in harmony. The resource utilization of industrial solid waste has increasingly become a research hotspot for scientific researchers. [0003] Flue gas desulfurization (FGD) is the most widely used method in the world to control SO 2 emission technology. According to the form of desulfurization agent and desulfurization ash, it can be divided into wet, ...

AI Technical Summary

Problems solved by technology

Those skilled in the art have also been trying to replace solid clay bricks with industrial waste as raw materials, but the results obtained so far are not ideal

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