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Method for improving grindability of steel slag

An easy-grindability and steel slag technology, applied in cement production and other directions, can solve the problems of poor grindability of steel slag tailings and low recycling rate of steel slag, and achieve the effect of good grindability and poor grindability.

Pending Publication Date: 2020-04-17
广西柳钢环保股份有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the above technical problems. The purpose of the present invention is to provide a method for improving the grindability of steel slag, which is used to solve the low recycling rate of steel slag in the prior art due to the poor grindability of steel slag tailings. question

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  • Method for improving grindability of steel slag

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Effect test

Embodiment 1

[0018] A method for improving the grindability of steel slag, comprising:

[0019] Put 500kg of dried limestone particles with a particle size of 0.1-1mm at the bottom of the slag tank, and pour 9000kg of liquid steel slag at a temperature of about 1200 degrees Celsius into the limestone, and use the impact force of the liquid steel slag poured into the bottom of the slag tank to hit the limestone to make the limestone particles Mix evenly with liquid steel slag to make limestone decompose rapidly under the heating of liquid steel slag to generate carbon dioxide gas. These carbon dioxide gases will generate holes in the liquid steel slag and form voids inside the steel slag after the steel slag cools down; pour the liquid steel slag and place it After 30 minutes, continue to process the reacted steel slag according to the normal boring process to obtain loose porous / high grindability steel slag.

Embodiment 2

[0021] Provide a method of improving the grindability of steel slag, including:

[0022] Put 500kg of dried limestone particles (particle size 1-2mm) at the bottom of the slag tank, wherein the particle size of the limestone particles is 1mm, and the moisture content of the limestone is 0.9%; then pour 9000kg of liquid steel slag with a temperature of about 1200 degrees Celsius Put limestone particles into the bottom of the slag tank, and use the impact force of liquid steel slag poured into the bottom of the slag tank to hit the limestone to make the limestone particles and liquid steel slag mix evenly, so that the limestone will be rapidly decomposed under the heating of the liquid steel slag to generate carbon dioxide gas. Holes will be generated in the liquid steel slag, and voids will be formed inside the steel slag after the steel slag cools down; after pouring the liquid steel slag, leave it for 2 hours, and then continue to process the reacted steel slag according to th...

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Abstract

The invention relates to a method for improving grindability of steel slag. The method comprises the steps that liquid steel slag with the temperature ranging from 1000 DEG C to 1500 DEG C is added into limestone particles; standing is carried out for 10 minutes to 4 hours; and the secondary treatment is carried out, which is one of hot splashing, hot braising, air quenching and water quenching. By adopting the method, the loose and porous / easily-ground steel slag is employed, and the technical problem of poor grindability of the steel slag in the prior art is solved.

Description

technical field [0001] The invention relates to a method for upgrading steel slag, in particular to a method for improving the wearability of steel slag. Background technique [0002] Steel slag is solid waste discharged during steelmaking. In 2018, China's crude steel output was 928 million tons. Based on the 100kg-150kg slag output per ton of steel smelting, the national steel slag production in 2018 was 90 million tons-139 million tons. million tons. The theme of protecting the environment and saving resources in our country continues to deepen, and the resource utilization of steel slag is becoming increasingly urgent. Generally speaking, the recycling of steel slag grinding refers to grinding the slag after iron selection on the basis of steel slag pretreatment, and making the particle size of the processed slag powder meet the requirements of comprehensive utilization. However, due to poor grindability, low activity, high production cost and low market acceptance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B5/06C04B7/147C04B7/38
CPCC04B5/065C04B7/147C04B7/38Y02P40/10
Inventor 龙顺红李雁翎周鹤斌吴文斌陆宗峰张芳李开权黄家维梁康李婷廖森登
Owner 广西柳钢环保股份有限公司
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