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Cement prepared by using refining furnace tailings as cement admixture

A refining furnace and mixed material technology, applied in the field of cement, can solve the problems of polluting the environment and the easy generation of dust by fine powder materials, and achieve the effects of reducing emissions, improving environmental benefits, and reducing the proportion of use

Inactive Publication Date: 2019-12-31
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the slow cooling of the refining furnace tailings during the cooling process, a large amount of initial β-C 2 S phase changes to γ-C 2 S, leading to the natural pulverization of the tailings of the refining furnace, a large amount of fine powder can easily generate dust and pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composition of cement is: 66 parts of silicate clinker, 24 parts of refining furnace tailings, and 10 parts of gypsum. After crushing the three, mix and grind them evenly, the finally obtained cement is the cement conforming to the national standard 325, its 28-day compressive strength is 46.9Mpa, and its stability is qualified.

Embodiment 2

[0023] The composition of the cement is: 80 parts of silicate clinker, 10 parts of refining furnace tailings, and 10 parts of gypsum. After crushing the three, mix and grind them evenly, the finally obtained cement is the cement conforming to the national standard 425, its 28-day compressive strength is 52.6Mpa, and its stability is qualified.

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PUM

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Abstract

The invention discloses cement prepared by using refining furnace tailings as a cement admixture, and belongs to the technical field of cement. The cement contains 10-30% by weight of the refining furnace tailings. According to the invention, the refining furnace tailings is obtained by using slag steel and slag iron as raw materials through smelting in an electric furnace and a refining furnace in order, and in the process of discharging the tailings from the furnace, treatment is performed by means of rapid cooling to obtain beta-type C2S with more mass and higher activity. The specially treated refining furnace tailings can be used as the high-quality high-activity cement admixture, after the refining furnace tailings is added into the cement, the use ratio of a cement clinker can be reduced, the discharge amount of carbon dioxide can be reduced, and the cement has better environmental benefits; and the cement can better utilize the waste slag and is in line with circular economy.

Description

technical field [0001] The invention belongs to the technical field of cement, and in particular relates to cement prepared by using refining furnace tailings as a cement mixture. Background technique [0002] Steel slag iron is the iron-containing material recovered from the metallurgical slag of steel mills, which can be used to smelt metal iron in electric furnaces and refining furnaces. [0003] As a secondary refining means of high-efficiency steel, the refining furnace can achieve rapid deoxidation, desulfurization, uniform temperature and composition of molten steel, and effective removal of inclusions in molten steel by means of arc heating, reducing slag and bottom blowing argon stirring. Purpose. Steelmaking is smelting slag, resulting in LF refining slag. [0004] Refining furnace tailings are rich in CaO and Al produced in the process of steelmaking and refining LF furnace. 2 o 3 alkaline or overbased slag. All the time it is handled irregularly in the slag ...

Claims

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Application Information

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IPC IPC(8): C04B7/19
CPCC04B7/19Y02P40/10
Inventor 范泽宇钱强张入元宋文德
Owner PANZHIHUA GANGCHENG GROUP