A kind of steel slag conditioning agent and using method thereof

A technology for conditioning agent and steel slag, applied in the field of iron and steel smelting, can solve the problems of low activity, poor stability, and reduce the content of calcium oxide and magnesium oxide, and achieve the effects of improving the gelling activity, increasing the strength and shortening the setting time.

Active Publication Date: 2021-12-28
FUJIAN FURUN BUILDING MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The effect of stimulating the chemical activity of steel slag is different due to the fluctuation of its chemical composition and mineral composition. In the experiment of the present invention, by directly adding the conditioner component before the steel slag is discharged, the conditioner and the liquid state are made under high temperature conditions. The chemical reaction of steel slag promotes the increase of active mineral phase content of steel slag, and reduces the content of free calcium oxide and magnesium oxide at the same time, solving the problem of low activity and poor stability of steel slag from the source of formation

Method used

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  • A kind of steel slag conditioning agent and using method thereof
  • A kind of steel slag conditioning agent and using method thereof

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Experimental program
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Effect test

Embodiment 1

[0046] After the molten steel is smelted in the converter, before the steel slag is discharged, the temperature of the steel slag is controlled at 700°C, and argon is blown to the bottom of the steel slag tank to keep the liquid steel slag stirring clockwise smoothly. Quickly add the components of conditioner on the liquid surface, including gel accelerator, alkaline activator, reinforcing fiber, and desulfurized gypsum, stir for 2 minutes, and slowly cool to 450°C, add polymer microspheres, and keep blowing argon for 40 seconds at the same time. Then the steel slag is discharged, cooled to room temperature, crushed and ground to obtain tempered steel slag powder.

Embodiment 2

[0048] After the molten steel is smelted in the converter, before the steel slag is discharged, the temperature of the steel slag is controlled at 780°C, and argon is blown to the bottom of the steel slag tank to keep the liquid steel slag stirring clockwise smoothly. Quickly add the components of conditioner on the liquid surface, including gel accelerator, alkaline activator, reinforcing fiber, and desulfurized gypsum, stir for 5 minutes, and slowly cool to 490°C, add polymer microspheres, and keep blowing argon for 30 seconds at the same time. Then the steel slag is discharged, cooled to room temperature, crushed and ground to obtain tempered steel slag powder.

Embodiment 3

[0050] After the molten steel is smelted in the converter, before the steel slag is discharged, the temperature of the steel slag is controlled at 800°C, and argon is blown to the bottom of the steel slag tank to keep the liquid steel slag stirring clockwise smoothly. Quickly add the components of conditioner on the liquid surface, including gel accelerator, alkaline activator, reinforcing fiber, and desulfurized gypsum, stir for 5 minutes, and slowly cool to 500°C, add polymer microspheres, and keep blowing argon for 30 seconds at the same time. Then the steel slag is discharged, cooled to room temperature, crushed and ground to obtain tempered steel slag powder.

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Abstract

The present invention directly adds the conditioner component before the steel slag is discharged, and causes the chemical reaction between the conditioner and the liquid steel slag under high temperature conditions, thereby increasing the active mineral phase content of the steel slag and reducing free calcium oxide and magnesium oxide at the same time content, to solve the problem of low activity and poor stability from the source of steel slag formation. At the same time, it can realize smooth slag discharge.

Description

technical field [0001] The invention belongs to a technology in the field of iron and steel smelting, and in particular relates to a steel slag conditioning agent and a using method thereof. Background technique [0002] Converter slag is used as waste slag during steelmaking, and generally accounts for about 20% of crude steel output. In recent years, with the rapid development of my country's iron and steel industry, the accumulation of steel slag has increased year by year, which not only occupies a large amount of land, but also causes serious environmental pollution. With the development of the national circular economy, it is required to realize the reuse of waste resources in the metallurgical industry, especially the reuse of metallurgical slag and waste gas has become the focus of circular economy in the metallurgical industry. The main chemical components of steel slag are CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 , MgO and a small amount of f-CaO, MnO, FeO, P 2 o 5 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/06
CPCC04B5/06
Inventor 温仁付
Owner FUJIAN FURUN BUILDING MATERIAL TECH
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