A kind of ladle anti-corrosion magnesia refractory mud and preparation method thereof

A kind of refractory mud, anti-erosion technology, applied in the field of refractory materials, can solve the problems of clip steel, low residual thickness of brick joints, etc., achieve the effect of offsetting volume shrinkage, good thermal shock stability, and reducing the risk of clipping steel

Active Publication Date: 2021-07-02
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a ladle anti-corrosion magnesia refractory mud and its preparation method, which has good effects of resisting molten steel erosion and steel slag erosion, and can solve the problem of low residual thickness of brick joints in the ladle during the VOD refining process. steel problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The ladle anti-corrosion magnesia refractory mud described in this embodiment is calculated according to the mass fraction, and its preparation raw materials include the following components:

[0026] 87 parts of fused magnesia with a particle size of 0.045-0.074mm, 2 parts of alumina fine powder with a particle size of 1-3μm, 5 parts of chromium oxide fine powder with a particle size of 0.045-0.074mm, and a particle size of 0.045-0.074mm 2 parts of zirconia fine powder, 2 parts of silicon carbide fine powder with a particle size of 0.045-0.074mm, 0.9 part of boron carbide fine powder with a particle size of 0.045-0.074mm, 0.6 part of dispersant sodium tripolyphosphate, and thickener 0.5 parts of sodium carboxymethyl cellulose.

[0027] The content of MgO in fused magnesia is greater than 98wt%, the content of CaO is less than 1.5wt%, Fe 2 o 3 The content of Al is less than 0.5wt%; Al in alumina micropowder 2 o 3 The content is greater than 99wt%; Cr in chromium oxi...

Embodiment 2

[0032] The ladle anti-corrosion magnesia refractory mud described in this embodiment is calculated according to the mass fraction, and its preparation raw materials include the following components:

[0033] 80 parts of fused magnesia with a particle size of 0.045-0.074mm, 8 parts of alumina fine powder with a particle size of 1-3μm, 4 parts of chromium oxide fine powder with a particle size of 0.045-0.074mm, and a particle size of 0.045-0.074mm 3 parts of zirconia fine powder, 3 parts of silicon carbide fine powder with a particle size of 0.045-0.074mm, 1.3 parts of boron carbide fine powder with a particle size of 0.045-0.074mm, 0.2 parts of sodium tripolyphosphate as a dispersant, and a tackifier 0.5 parts of sodium carboxymethyl cellulose.

[0034]The content of MgO in fused magnesia is greater than 98wt%, the content of CaO is less than 1.5wt%, Fe 2 o 3 The content of Al is less than 0.5wt%; Al in alumina micropowder 2 o 3 The content is greater than 99wt%; Cr in chro...

Embodiment 3

[0039] The ladle anti-corrosion magnesia refractory mud described in this embodiment is calculated according to the mass fraction, and its preparation raw materials include the following components:

[0040] 80 parts of fused magnesia with a particle size of 0.045-0.074mm, 8 parts of alumina fine powder with a particle size of 1-3μm, 4 parts of chromium oxide fine powder with a particle size of 0.045-0.074mm, and a particle size of 0.045-0.074mm 3 parts of zirconia fine powder, 2.4 parts of silicon carbide fine powder with a particle size of 0.045-0.074 mm, 1.4 parts of boron carbide fine powder with a particle size of 0.045-0.074 mm, 0.2 parts of dispersant sodium tripolyphosphate, tackifier Sodium carboxymethyl cellulose 1 part.

[0041] The content of MgO in fused magnesia is greater than 98wt%, the content of CaO is less than 1.5wt%, Fe 2 o 3 The content of Al is less than 0.5wt%; Al in alumina micropowder 2 o 3 The content is greater than 99wt%; Cr in chromium oxide f...

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Abstract

The invention provides a ladle anti-corrosion magnesia refractory mud and a preparation method thereof. The ladle anti-corrosion magnesia refractory mud is calculated according to the mass fraction, and its preparation raw materials include the following components: 40-120 parts of fused magnesia, alumina 1-15 parts of fine powder, 0.5-8 parts of chromium oxide fine powder, 0.5-8 parts of zirconia fine powder, 0.5-8 parts of silicon carbide fine powder, 0.3-4 parts of boron carbide fine powder, 0.1-2 parts of dispersant, Adhesive 0.1-2 parts. The corrosion-resistant magnesia refractory mud for the steel ladle has good effects of resisting molten steel erosion and steel slag erosion, and can solve the problems of low residual thickness at brick joints and steel clamping in the ladle during the VOD refining process.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a ladle anti-corrosion magnesia refractory mud and a preparation method thereof. Background technique [0002] With the increasing market demand for high-quality steel, steel mills have higher and higher requirements for molten steel refining. Ladle VOD refining is a common refining method in China and is the most corrosive to ladle bricks. Ladles are in the process of VOD refining. In a vacuum environment, the molten steel corrodes the refractories most severely during the vacuuming process. The masonry brick joints of the brick ladle are the passages for exhaust, and at this time the brick joints are most vulnerable to erosion and erosion. It is not difficult to see from the residual thickness of ladle bricks that the lowest residual thickness of ladle bricks is at the brick joints. In the VOD refining environment, the effect of ordinary refractory mud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/053C04B35/66C04B35/626C21C7/10B22D41/02
CPCB22D41/02C04B35/053C04B35/6263C04B35/66C04B2235/3217C04B2235/3241C04B2235/3244C04B2235/3821C04B2235/3826C04B2235/5436C04B2235/9607C04B2235/9669C21C7/10Y02P10/20
Inventor 王团收刘丽张盛贾祥超任林颜浩刘靖轩李健崔志强付杰豪
Owner 北京利尔高温材料股份有限公司
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