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Steel slag hardening and tempering agent and using method thereof

A conditioner and steel slag technology, 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, etc., and achieve the effect of increased gelling activity, increased strength, and smooth slag discharge

Active Publication Date: 2021-02-19
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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  • Steel slag hardening and tempering agent and using method thereof
  • Steel slag hardening and tempering 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

According to the invention, a hardening and tempering agent component is directly added before steel tapping and discharging, and the hardening and tempering agent and the liquid steel slag are subjected to a chemical reaction under a high-temperature condition so that the content of active mineral phases of the steel slag is increased, the content of free calcium oxide and magnesium oxide is reduced, and the problems of low activity and poor stability of the steel slag are solved from the source of steel slag formation, meanwhile, smooth deslagging can be realized.

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 Applications(China)
IPC IPC(8): C04B5/06
CPCC04B5/06
Inventor 温仁付
Owner FUJIAN FURUN BUILDING MATERIAL TECH
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