Method for preparing large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material

Abstract

The invention discloses a method for preparing a large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material. The method comprises the following steps: putting phosphorus slag and desulfurized fly ash into a wet-milling machine, and performing mixing and wet milling so as to obtain mixed slurry A; grinding caustic dross, ardealite and coal ash in a dry-milling machine so as to obtain a mixed powder material B; and mixing the mixed slurry A with the mixed powder material B so as to obtain a mixed material C, adding cement, a water reduction agent, a retarder, tailing sand and macadam into the mixed material C, and performing stirring for 4 minutes, so as to obtain super-retarding concrete. Wastes such as the phosphorus slag, desulfurized fly ash, caustic dross, ardealite, coal ash and tailings are adopted to prepare concrete, wastes are turned into wealth, and the amount of cement can be also reduced; due to a mixed wet-milling mode of the phosphorus slagand the desulfurized fly ash, phosphorus dissolution of the phosphorus slag can be promoted, the initial setting time and the final setting time of the concrete can be greatly prolonged, early-stagehydration heat can be reduced, cracks can be reduced, later strength can be ensured, and large-admixture-amount efficient application of the phosphorus slag can be achieved; and the prepared super-retarding concrete can be applied to large-size concrete, drilling bitten piles, and the like.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a large-volume wet-grinding phosphorus solid waste ultra-retarding gelling material. Background technique [0002] There are a lot of phosphate rock resources in nature, which can be used to produce phosphoric acid by wet method. In the process of phosphoric acid production by wet method, industrial waste residues such as phosphorus slag and phosphogypsum will be discharged; on the other hand, mineral processing will also produce a large amount of phosphorus tailings. Most phosphorus solid wastes are stacked in the open air, which not only occupies a large amount of land resources, but also contains phosphorus, fluorine and organic matter, which are washed by rainwater and seriously pollute nearby soil and water resources. Therefore, the effective utilization of phosphorus solid waste has extremely important environmental protection significance. [0003...

AI Technical Summary

Problems solved by technology

Although the coagulation time of this invention is more than 60h, its 28-day strength is only 28MPa

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