Non-sintered brick based on flue gas desulfurization byproduct and preparation method thereof
A desulfurization by-product, sintering-free technology, applied in the field of building materials, can solve problems such as unsatisfactory effects, achieve significant economic and social benefits, meet energy conservation and emission reduction, and simplify the production process.
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Embodiment 1
[0024] A non-sintered brick, which uses flue gas desulfurization ash as the main material, supplemented by cement, fly ash, gypsum and sand, is obtained by pressing and curing after adding water, mixing and stirring evenly. Among them: the desulfurization ash is the powder obtained by drying and sieving the desulfurization by-products produced by the semi-dry flue gas desulfurization process of the circulating fluidized bed. The remaining rate is about 3.48%. The calcium oxide content in the desulfurization ash is 55%, the sulfur oxide content is 28%, and the silicon and aluminum oxide content is 6%. The cement is selected from the national standard GB175-2007 with a strength grade of 32.5. The fly ash is grade II ash in the national standard GB / T1596-2005. The gypsum is selected from the first-grade dihydrate gypsum in the national standard GB5483-85. The sand is river sand that has been dried and sieved, and its water content is about 0.75%, and its particle size is all be...
Embodiment 2
[0032] Another kind of non-sintered brick, which uses flue gas desulfurization ash as the main material, supplemented by cement, fly ash, gypsum and sand, is obtained by pressing and curing after mixing with water and stirring evenly. Among them: the desulfurization ash is the powder obtained by drying and sieving the desulfurization by-products produced by the reflux circulating fluidized bed semi-dry flue gas desulfurization process. The moisture content is about 0.64%, and the 0.074mm square hole The excess sieve rate is about 4.76%, the calcium oxide content in the desulfurization ash in the desulfurization ash is 60%, the sulfur oxide content is 26%, and the silicon and aluminum oxide content is 5.8%. The cement is selected from the cement with a strength grade of 42.5 in the national standard GB175-2007. The fly ash is grade II ash in the national standard GB / T1596-2005. The gypsum is selected from the first-grade dihydrate gypsum in the national standard GB5483-85. Th...
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