Method for preparing high-performance concrete additive by using steel slag ball-milling waste residue

Abstract

The invention discloses a method for preparing high-performance concrete additive by using steel slag ball-milling waste residue, belonging to the technical field of concrete for building materials. The method comprises the steps: ovetails containing metallic iron is separated from the waste residue through a spiral classifier; washed turbid liquid is conveyed into a sedimentation tank; sedimentedtailing slurry with higher water content is pressed to a mud cake with lower water content by a pressure filter; the water content of the tailing slurry is reduced to below 3 percent after drying andcrushing; and then the tailing slurry enters a ball mill to be grinded to 500m<2> / kg, thus obtaining the high-performance concrete additive. The method has the advantages of simple process, low cost,superior performance, obvious effects on improving concrete strength and construction quality and reducing concrete and construction costs and environment pollution, and has significant economical and practical significance for promoting the smooth implementation of strategy of sustainable development of China.

Description

technical field [0001] The invention belongs to the technical field of concrete for building materials, and in particular relates to a method for preparing high-performance concrete admixtures by using steel slag ball mill waste slag, which is further sorted, crushed, dried and ground to produce high-performance concrete admixtures for concrete. Admixtures. Background technique [0002] In order to maximize the selection of metallic iron contained in steel slag, many areas in China often adopt ball mill wet separation process. Steel slag ball mill waste slag is the residual slag after ball mill water washing and then magnetic separation. Due to the high water content and low iron content of the waste residue, the utilization rate is low. Most enterprises no longer use the waste residue washed by the ball mill and discharge it directly, causing new pollution to the environment and bringing great pressure to environmental protection. . Therefore, the resource reuse of steel ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing high-performance concrete admixture by using steel slag ball mill waste slag, which solves the problems of steel slag iron removal and difficult grinding, and realizes low-cost ultra-fine grinding of steel slag. Physical excitation gives full play to the activity of steel slag, and its performance is superior to that of ordinary steel slag. It is a high-performance admixture