Preparation method of aluminum-magnesium carbon steel ladle refractory bricks

A refractory brick, aluminum-magnesium-carbon technology, applied in the field of iron and steel metallurgy, can solve the problems of molten steel pollution, poor corrosion resistance, and ineffective removal of inclusions in steel, etc., to achieve extended service life, high continuity, and improved spalling resistance performance effect

Inactive Publication Date: 2014-05-14
WUXI CHENGBO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum-magnesium refractory bricks used before have no effect on the removal of inclusions in the steel and have poor corrosion resistance, which is easy to pollute the molten steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing aluminum-magnesium-carbon ladle refractory bricks, which are composed of the following components in parts by weight: 28 parts of α-corundum, 42 parts of fused magnesia, 6 parts of fused aluminum-magnesium spinel, and alumina 4 parts of micropowder, 1 part of silicon carbide powder, 2.5 parts of metal aluminum powder, 3 parts of phenolic resin, 5 parts of flake graphite, in which the particle size of α-corundum, fused magnesia, and fused aluminum-magnesium spinel is 1-10mm, In each component, 1-3mm accounted for 25%, 3-6mm accounted for 45%, 6-10mm accounted for 30%, the particle size of alumina powder, silicon carbide powder, metal aluminum powder was -200 mesh, flake graphite The particle size is -28 mesh, and the preparation method includes the following steps:

[0017] 1) Mixing: first put α-corundum, fused magnesia sand, and fused aluminum-magnesium spinel into the mixer according to the above content and particle size ratio and mix for 4 minute...

Embodiment 2

[0022] A method for preparing aluminum-magnesium-carbon ladle refractory bricks, which are composed of the following components in parts by weight:

[0023] 32 parts of α-corundum, 38 parts of fused magnesia, 8 parts of fused aluminum-magnesium spinel, 3 parts of alumina powder, 2 parts of silicon carbide powder, 1.5 parts of metal aluminum powder, 5 parts of phenolic resin, 3 parts of flake graphite , The particle size of α-corundum, fused magnesia, and fused aluminum-magnesium spinel is 1-10mm, each component of 1-3mm accounts for 25%, 3-6mm accounts for 45%, 6-10mm Accounted for 30%, the particle size of alumina powder, silicon carbide powder, and metal aluminum powder is -200 mesh, and the particle size of flake graphite is -28 mesh. The preparation method includes the following steps:

[0024] 1) Mixing: first put α-corundum, fused magnesia sand, and fused aluminum-magnesium spinel into the mixer according to the above content and particle size ratio and mix for 6 minutes, the...

Embodiment 3

[0029] A method for preparing aluminum-magnesium-carbon ladle refractory bricks, which are composed of the following components in parts by weight: 30 parts of α-corundum, 40 parts of fused magnesia, 7 parts of fused aluminum-magnesium spinel, and alumina 3.5 parts of micro powder, 1.5 parts of silicon carbide powder, 2 parts of metal aluminum powder, 4 parts of phenolic resin, 4 parts of flake graphite, among which the particle size of α-corundum, fused magnesia, and fused aluminum-magnesium spinel is 1-10mm, In each component, 1-3mm accounted for 25%, 3-6mm accounted for 45%, 6-10mm accounted for 30%, the particle size of alumina powder, silicon carbide powder, metal aluminum powder was -200 mesh, flake graphite The particle size is -28 mesh, and the preparation method includes the following steps:

[0030] 1) Mixing: first put α-corundum, fused magnesia sand, and fused aluminum-magnesium spinel according to the above content and particle size ratio into the mixer for 5 minutes...

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Abstract

The invention discloses a preparation method of aluminum-magnesium carbon steel ladle refractory bricks. A refractory brick consists of the following components in parts by weight: 28-32 parts of alpha-corundum, 38-42 parts of fused magnesite, 6-8 parts of fused aluminum-magnesium spinel, 3-4 parts of aluminum oxide micro powder, 1-2 parts of silicon carbide powder, 1.5-2.5 parts of metal aluminum powder, 3-5 parts of phenolic resin and 3-5 parts of crystalline flake graphite. The preparation method comprises the following steps: 1) mixing: firstly mixing the alpha-corundum, fused magnesite and fused aluminum-magnesium spinel in a mixer for 4-6 minutes, adding the phenolic resin, and mixing for 5-8 minutes; adding the crystalline flake graphite and mixing for 12-16 minutes; adding the aluminum oxide micro powder, silicon carbide powder and metal aluminum powder, and mixing for 20-30 minutes; 2) moulding with a press; 3) baking in a drying kiln, wherein the hot air temperature in the kiln body is kept at 200-250 DEG C, and the baking time is not shorter than 12 hours; 4) picking and packaging.

Description

Technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing aluminum-magnesium-carbon ladle refractory bricks. Background technique [0002] The working lining of the ladle bottom and wall (non-slag line area) of the smelting furnace of the steelmaking plant are all kinds of composite bricks. The most important requirement for composite bricks is a long service life. Otherwise, the working lining is often replaced. Affect the continuity of work, and due to overhaul and stop production will cause great economic losses. The current domestic similar products for ladle generally have a low life expectancy, with an average of 60-80 furnaces. This is due to the following reasons: 1. The main materials of the existing ladle bricks are relatively cheap. The product grade is low; 2. The carbon content is high (about 10%). The carbon content affects the thermal conductivity of the product. The higher the carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
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