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A kind of deoxidizer for metal waste slag smelting and preparation method thereof

A technology of deoxidizer and waste slag, which is applied in the field of metal waste slag smelting deoxidizer and its preparation, can solve the problems of reducing steel strength and toughness, destroying the continuity of steel matrix, and uneven steel structure, so as to enhance adsorption performance and improve utilization rate, the effect of not easy to reunite

Active Publication Date: 2021-11-02
芜湖县天海耐火炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of non-metallic inclusions destroys the continuity of the steel matrix, resulting in uneven steel structure, which will have a certain impact on various properties of the steel, such as reducing the strength and toughness of the steel, etc.

Method used

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  • A kind of deoxidizer for metal waste slag smelting and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0024] A deoxidizer for metal waste smelting, made of the following raw materials in parts by weight: 35 parts of expanded graphite powder, 20 parts of calcium carbonate, 20 parts of calcium oxide, 5 parts of passivated magnesium particles, 10 parts of polyethylene glycol,

[0025] The deoxidizer for metal waste slag smelting is made by the following method:

[0026] Step S1, adding calcium oxide, expanded graphite powder, passivated magnesium particles, polyethylene glycol and calcium carbonate into a ball mill for ball milling in turn, controlling the ball mill speed to 800r / min, and the forward and reverse ball milling time is 1h to prepare the mixture B, Afterwards, the mixture B is pressed to obtain a green body;

[0027] Step S2, transfer the prepared green body to a high temperature furnace for calcination, control the temperature of the high temperature furnace to rise to 350°C at a rate of 5°C / min, and calcine at this temperature for 3 hours to prepare a deoxidizer fo...

Embodiment 2

[0032] A deoxidizer for metal waste smelting, made of the following raw materials in parts by weight: 40 parts of expanded graphite powder, 22 parts of calcium carbonate, 22 parts of calcium oxide, 6 parts of passivated magnesium particles, 12 parts of polyethylene glycol,

[0033] The deoxidizer for metal waste slag smelting is made by the following method:

[0034] Step S1, adding calcium oxide, expanded graphite powder, passivated magnesium particles, polyethylene glycol and calcium carbonate into a ball mill for ball milling in turn, controlling the ball mill speed to 800r / min, and the forward and reverse ball milling time is 1h to prepare the mixture B, Afterwards, the mixture B is pressed to obtain a green body;

[0035] Step S2, transfer the prepared green body to a high temperature furnace for calcination, control the temperature of the high temperature furnace to rise to 350°C at a rate of 5°C / min, and calcine at this temperature for 3 hours to prepare a deoxidizer fo...

Embodiment 3

[0040] A deoxidizer for metal waste smelting, made of the following raw materials in parts by weight: 45 parts of expanded graphite powder, 28 parts of calcium carbonate, 28 parts of calcium oxide, 7 parts of passivated magnesium particles, 16 parts of polyethylene glycol,

[0041] The deoxidizer for metal waste slag smelting is made by the following method:

[0042] Step S1, adding calcium oxide, expanded graphite powder, passivated magnesium particles, polyethylene glycol and calcium carbonate into a ball mill for ball milling in turn, controlling the ball mill speed to 800r / min, and the forward and reverse ball milling time is 1h to prepare the mixture B, Afterwards, the mixture B is pressed to obtain a green body;

[0043] Step S2, transfer the prepared green body to a high temperature furnace for calcination, control the temperature of the high temperature furnace to rise to 350°C at a rate of 5°C / min, and calcine at this temperature for 3 hours to prepare a deoxidizer fo...

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Abstract

The invention discloses a deoxidizer for metal waste smelting, which is made of the following raw materials in parts by weight: 35-50 parts of expanded graphite powder, 20-30 parts of calcium carbonate, 20-30 parts of calcium oxide, and 5-8 parts of passivated magnesium particles , 10-20 parts of pore-enlarging agent, add calcium oxide, expanded graphite powder, passivated magnesium particles, pore-enlarging agent and calcium carbonate into the ball mill for ball milling in turn, control the ball mill speed to 800-850r / min, and the forward and reverse ball milling time is 1h, the mixture B is prepared, and then the mixture B is pressed to obtain a green body; the invention also discloses a preparation method of a deoxidizer for metal waste smelting; a pore expander is added in the invention, and when used The deoxidizer not only has a large specific surface area, but also has a high porosity, which is conducive to the internal diffusion of the gas, can improve the utilization rate of the internal components of the deoxidizer, and improve the deoxidation effect.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, in particular to a deoxidizer for metal waste smelting and a preparation method thereof. Background technique [0002] Non-metallic inclusions in steel are mainly compounds formed by iron, manganese, chromium, aluminum, titanium and other metal elements and oxygen, sulfur, nitrogen, etc. Among them, the oxides are mainly deoxidation products, including primary deoxidation products that fail to float and deoxidation products formed by deoxidation reaction (secondary oxidation) during the solidification process of molten steel; or due to slag and refractory materials mixed into steel. . The existence of non-metallic inclusions destroys the continuity of the steel matrix, resulting in uneven steel structure, which will have a certain impact on various properties of the steel, such as reducing the strength and toughness of the steel. Non-metallic inclusions are mainly sulfides (MnS, FeS, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C22C29/00B22F3/11C22C1/08
CPCB22F3/11C21C7/06C22C29/005
Inventor 童振兰吴大宏
Owner 芜湖县天海耐火炉料有限公司