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Preparation method of superfine slag powder

A technology for ultra-fine slag powder and slag powder, which is applied in the field of building materials, can solve the problems of incapable of ball mill preparation of ultra-fine slag powder, and achieves the effects of low cost and simple preparation method.

Active Publication Date: 2013-06-26
北京中联新航建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the ball mill cannot be used to prepare ultrafine slag powder in the prior art, and a method for preparing ultrafine slag powder by using a ball mill is provided

Method used

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  • Preparation method of superfine slag powder

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Experimental program
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Effect test

Embodiment 1

[0025] The preparation method of superfine slag powder described in the present embodiment, comprises the steps:

[0026] (1) Mix 6.4kg of S95 slag powder with 12kg of the first grinding medium, wherein the first grinding medium is 4kg of steel balls, 3kg of steel balls, 2kg of steel balls, and 1kg of A mixture of steel columns and 2kg steel columns; grind in a ball mill for 55 minutes;

[0027] (2) Add 8 kg of second grinding medium to the step (1), wherein the second grinding medium is a steel ball with a diameter of 2000 Å, and continue grinding for 390 minutes to obtain the ultrafine slag powder A of the present invention.

Embodiment 2

[0029] The preparation method of superfine slag powder described in the present embodiment, comprises the steps:

[0030] (1) Mix 4kg of S75 slag powder with 56kg of the first grinding medium, wherein the first grinding medium is 28kg of steel balls, 4kg of steel balls, 20kg of steel balls, 1.6kg of steel columns, 2.4kg of The mixture of the steel column is ground in a ball mill for 45min;

[0031] (2) Add 24 kg of second grinding medium to the step (1), wherein the second grinding medium is a steel ball with a diameter of 2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 were continued grinding for 480min, that is to prepare ultrafine slag powder B of the present invention.

Embodiment 3

[0033] The preparation method of superfine slag powder described in the present embodiment, comprises the steps:

[0034] (1) Mix 5kg of S105 slag powder with 16kg of the first grinding medium, wherein the first grinding medium is 6kg of steel balls, 2kg of steel balls, 2kg of steel balls, 2.6kg of steel columns, 3.4kg of The mixture of steel columns is ground in a ball mill for 60 minutes;

[0035] (2) Add a 4kg of grinding medium to the step (1) to the step (1), where the second grinding medium is steel balls with diameter, continuing to grind 300min, that is, the super fine slag powder C is prepared by the present invention.

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Abstract

The invention provides a preparation method of superfine slag powder. The method comprises the following steps of: mixing the slag powder with a first grinding medium, and grinding for 45-90minutes in a ball mill; (2) adding a second grinding medium into the step (1), and continuously grinding for 180-480minutes to obtain the superfine slag powder. The first grinding medium is a mixture consisting of steel balls with diameters of 60mm, 40mm and 20mm as well as steel columns with diameters of 20mm and 10mm. The second grinding medium is steel balls with diameter of 20mm. According to the preparation method provided by the invention, a one-step grinding method in conventional technology is replaced by a two-step grinding method, and the grinding time in each step is shortened, and the grinding medium in special grade is matched to prepare the superfine slag powder. The superfine slag powder provided by the invention has the advantages of simpleness in preparation method and low in cost, and is suitable for engineering application.

Description

technical field [0001] The invention relates to a preparation method of ultrafine slag powder, which belongs to the field of building materials. Background technique [0002] Slag is the main solid waste in the ferrous metallurgical industry and has high potential activity. At present, in addition to being used to produce slag cement, slag can also be ground into slag powder and used as a concrete admixture. When slag powder is used as a concrete admixture, it can not only save the amount of cement and reduce the cost of concrete, but also improve the submicrostructure in concrete, reduce the heat of hydration of concrete and improve the fluidity, workability and reliability of concrete construction. pump performance. When slag powder is used as a concrete admixture, one of the basic requirements is that it must have a large enough specific surface area, because the higher the specific surface area, the higher its activity index, and the high activity index can accelerate ...

Claims

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Application Information

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IPC IPC(8): B02C17/10B02C17/20
Inventor 孙占兴聂法智贾伟进
Owner 北京中联新航建材有限公司
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