Steel scoria tail mud composite slag micro mist agglutination material

Abstract

The invention relates to a cementing material of steel slag tailings and composite slag micro powder, which comprises the composite slag micro powder and the steel slag tailings, and the weight ratio of the composite slag micro powder to the steel slag tailings is between 1 to 1 and 1 to 3; the specific surface area of the composite slag micro powder is larger than 350 m/kg, the composite slag micro powder comprises a combined material and the slag micro powder, wherein the combined material accounts for 8 to 35 percent of the composite slag micro powder by weight, and the slag micro powder accounts for 65 to 92 percent of the composite slag micro powder by weight; and the combined material comprises gypsum. The cementing material has the advantages that: 1, the method is an effective method utilizing large amount of waste slag; 2, the raw material of the composite slag micro powder has wide source; 3, the steel slag tailings are natural-grade tailings after steel slag wet-type ball milling magnetic separation particles are toughened, and the settled tailings do not need to be dried and are directly used as an auxiliary material; and 4, the steel slag tailings account for large proportion, and can fully utilize waste slag resources.

Description

technical field [0001] The invention relates to a cementitious material, in particular to a cementitious material for construction engineering prepared by utilizing iron and steel slag, in particular to a cementitious material using steel slag tailing sludge as a raw material. Background technique [0002] At present, many cementitious materials for construction projects are produced using steel slag, such as: [0003] Patent Application No. 01106474 discloses a cementitious material composed of composite slag micropowder and steel slag fine aggregate, and the steel slag fine aggregate is steel slag with a grain size similar to that of sand. [0004] Patent application No. 200710010093 discloses cementitious material for building mortar and its production method, its raw materials (wt%) are: cement clinker 10-25, slag 12-20, bluestone 10-20, fly ash 10-28, white ash Slag or vanadium iron slag 5-20, aluminum slag 3-10, zeolite 6-10, phosphogypsum 0.5-2.0, admixture 2-4. [...

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Problems solved by technology

Due to the small particles of steel slag tailings, the steel slag particles are all less than 1 mm, and contain a large amount of water, which makes the reuse of steel slag tailings difficult. Therefore, there are no related reports on the use of steel slag tailings to prepare cementitious materials for construction projects.

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