Composite micro-powder made of mineral slag and steel slag

Abstract

The invention provides composite micro-powder made of mineral slag and steel slag. The composite micro-powder made of the mineral slag and the steel slag is prepared from 72-82% of specially-made mineral slag with the grain size smaller than or equal to 5mm, 2-5% of high-content glass materials, 15-25% of tail steel slag with the grain size smaller than or equal to 20mm and 6-9% of solid activityactivators, wherein the specially-made mineral slag is prepared from furnace slag obtained by the aid of a process of cyclic utilization of the steel slag and metallurgical and chemical engineering iron-containing waste slag and is prepared by subjecting the waste slag to conventional water quenching, and the process belongs to the Taizhou Zhenchang Industrial Waste Slag Comprehensive UtilizationLimited Liability Company; and the composite micro-powder made of the mineral slag and the steel slag is prepared by drying, measuring, mixing and grinding the substances sequentially, and adding liquid additives accounting for 0.1% of the total weight of the substances in the mixing and grinding process of raw materials. The performance of the composite micro-powder can meet the S75 level requirements of 'GB / T18046-2008 granulated blast-furnace slag used for cement and concrete', and can be used for substituting for mineral slag micro-powder as cement additives and concrete additives.

Description

technical field [0001] The invention relates to the comprehensive utilization of industrial solid waste, in particular to a composite micropowder of slag and steel slag produced by Taizhou Zhenchang Company's special slag and tailing steel slag as building materials. Background technique [0002] Steel slag is a bulk industrial waste slag discharged from steelmaking converters or electric furnaces. The discharge amount is about 15% of the steel output. Generally, it also contains about 10% of scrap steel and more than 15% of iron oxide components, and is rich in Ca and Mg. The basic oxide compound mineral clinker, and most of them are in the state of slag-coated iron and iron-coated slag solid compound, which is difficult to break and grind. It is labor-intensive and labor-intensive to achieve crushing, sorting and purification for reuse. strenuous. Therefore, most of the low-grade iron-containing steel slags are not effectively recycled, and the recyclable ferrite resource...

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Problems solved by technology

[0008] According to the deficiencies of the prior art, the present invention makes full use of the special slag produced by Taizhou Zhenchang Company after the comprehensive treatment of steel slag and iron-containing waste slag, and provides a method of compounding the special slag and tailing steel slag of Taizhou Zhenchang Company and adding some The micropowder mixed with high-content vitreous material, solid active activator and liquid admixture solves the shortcomings of insufficient alkalinity, low activity and low vitreous content of the special slag made by Taizhou Zhenchang Company. It is a comprehensive utilization of solid waste. The innovation, which not only improves the utilization rate of steel slag, iron-containing waste slag and tailing steel slag, but also solves the problem of environmental pollution caused by waste slag discharge

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