Superfine steel slag powder based on 3D printing technology and preparation method thereof

Abstract

The invention belongs to the technical field of concrete, and particularly relates to superfine steel slag powder based on a 3D printing technology and a preparation method of the superfine steel slag powder. According to the invention, the coarse steel slag powder raw material is ground until the particle size is less than or equal to 6.5 mu m and the specific surface area is 720-750m < 2 > / kg, so that the steel slag powder meets the superfine requirement and can be quickly combined and cured with cement in concrete. In addition, the invention further provides an annular blowing type ball mill which structurally comprises a supporting ring unit, a middle rotating ring unit, a grinding cylinder unit, a feeding cylinder unit and a sliding pipe unit and has the effects of being sufficient in grinding strength and high in grinding efficiency.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to an ultrafine steel slag powder based on 3D printing technology and a preparation method thereof. Background technique [0002] Concrete 3D printing technology refers to an emerging technology that uses computer layered modeling, and sends out program commands, and industrial robots are controlled to repeatedly lay materials layer by layer, and then build a free-form architectural structure. [0003] It can be seen that the technology is mainly divided into three parts, one is the level of mechanical equipment, the other is the level of computer programs, and the third is the level of concrete materials. Among them, there are two main requirements for concrete: short setting time and rapid strength development. Therefore, there are now many concrete materials dedicated to 3D printing technology. [0004] For example, the Chinese invention patent with the patent publi...

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Problems solved by technology

[0008] However, the ball milling device in this utility model patent has at least the following two deficiencies during use, which eventually lead to poor grinding and preparation of ultrafine steel slag powder:

[0009] First, the lack of blowing function makes the qualified steel slag powder unable to pass through the sieve quickly and still occupies abrasive resources, resulting in that the steel slag powder with too large particle size cannot be quickly and fully ground;

[0010] Second, the efficiency of feeding operation and rotating operation is not high, and the grinding cylinder cannot be fully rotated

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