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High-performance carbon-free and low-carbon ladle brick and preparation method thereof

A low-carbon steel, high-performance technology, applied in the field of high-temperature materials and metallurgy, can solve the problems of weak corrosion resistance and seismic performance, insufficient mixing uniformity, high porosity of products, etc., to improve construction performance, reduce porosity, and erosion resistance excellent effect

Active Publication Date: 2017-05-31
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used ladle bricks are carbon-containing ladle bricks. The disadvantages of this kind of ladle bricks are: the carbonization of clean steel is serious, and at the same time, due to the oxidation of carbon, the atmosphere is more or less polluted.
The cost of raw materials used in this invention is relatively high, and the corundum regenerated materials have different particle sizes, but they are directly mixed in the process of product preparation, the mixing uniformity is not enough, and the porosity of the prepared product is relatively high, resulting in weak corrosion resistance and shock resistance of the product

Method used

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  • High-performance carbon-free and low-carbon ladle brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-performance carbon-free and low-carbon ladle brick comprises the following raw materials in parts by weight: 45 parts of corundum, 3 parts of graphite, 40 parts of bauxite, 10 parts of andalusite, 2 parts of silicon carbide and 3 parts of phenolic resin.

[0030] Among them, corundum is a mixture of corundum with a particle size of ≤0.074mm, corundum with a particle size of 0.5-1mm, and corundum with a particle size of 1-3mm at a weight ratio of 6:2:1.

[0031] The bauxite is mixed with bauxite with a particle size of 0.5-1mm, bauxite with a particle size of 1-3mm and bauxite with a particle size of 3-5mm in a weight ratio of 1:1.5:1.5.

[0032] The corundum is grade 95 brown corundum.

[0033] Among them, the graphite is flake graphite, the grade is -397, and the particle size is 0.048-0.15mm.

[0034] Among them, the particle size of silicon carbide is 0.074-0.15mm.

[0035] A method for preparing high-performance carbon-free and low-carbon ladle-clad bricks,...

Embodiment 2

[0040] A high-performance carbon-free low-carbon ladle-clad brick comprises the following raw materials in parts by weight: 69 parts of corundum, 30 parts of bauxite, 1 part of silicon carbide and 3 parts of phenolic resin.

[0041] Among them, the corundum is a mixture of corundum with a particle size of ≤0.074mm, corundum with a particle size of 0.5-1mm and corundum with a particle size of 3-5mm according to a weight ratio of 6:3:3.

[0042] Wherein the bauxite is bauxite with a particle diameter of 1-3mm.

[0043] The corundum is tabular corundum.

[0044] Among them, the graphite is flake graphite, the grade is -399, and the particle size is 0.048-0.15mm.

[0045] Among them, the particle size of silicon carbide is 0.074-0.15mm.

[0046] A method for preparing high-performance carbon-free and low-carbon ladle-clad bricks, comprising the following steps:

[0047] (1) Mix corundum with a particle size of 0.5-1mm, corundum with a particle size of 1-3mm, corundum with a par...

Embodiment 3

[0051] A high-performance carbon-free low-carbon ladle brick comprises the following raw materials in parts by weight: 40 parts of corundum, 1 part of graphite, 32 parts of bauxite, 2 parts of andalusite, 1.5 parts of silicon carbide and 2 parts of phenolic resin.

[0052] Among them, corundum is a mixture of corundum with a particle size of ≤0.074mm, corundum with a particle size of 0.5-1mm, corundum with a particle size of 1-3mm, and corundum with a particle size of 3-5mm according to a weight ratio of 6:2.5:1:2.

[0053] The bauxite is mixed with bauxite with a particle size of 0.5-1mm, bauxite with a particle size of 1-3mm and bauxite with a particle size of 3-5mm in a weight ratio of 1:1.5:1.

[0054] The corundum is white corundum.

[0055] Among them, the graphite is flake graphite, the grade is -399, and the particle size is 0.048-0.15mm.

[0056] Among them, the particle size of silicon carbide is 0.074-0.15mm.

[0057] A method for preparing high-performance carbon...

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Abstract

The invention discloses a high-performance carbon-free and low-carbon ladle brick which comprises the following raw materials in parts by weight: 40-70 parts of corundum, 0-3 parts of graphite, 30-40 parts of bauxite, 0-10 parts of andalusite, 1-3 parts of silicon carbide and 2-4 parts of phenolic resin. According to the high-performance carbon-free and low-carbon ladle, the raw materials adopted are fewer, the process is simple, the product prepared is low in porosity, high in strength, and excellent in thermal shock resistance, erosion resistance, washing resistance and oxidative resistance, and long in service life.

Description

technical field [0001] The invention relates to the technical field of high-temperature materials and metallurgy, in particular to a high-performance carbon-free and low-carbon ladle brick and a preparation method thereof. Background technique [0002] With the development of the steelmaking industry, carbon-free and low-carbon ladle bricks have become one of the important innovative technologies in the steel industry. During use, ladle bricks have to withstand the chemical erosion and physical erosion of high-temperature molten steel for a long time. Due to the variable thermal shock and mechanical wear, the service conditions are extremely harsh, so the ladle brick must have the characteristics of high strength, wear resistance, slag corrosion resistance and good thermal shock stability. The currently used ladle bricks are carbon-containing ladle bricks. The disadvantages of this kind of ladle bricks are: the carbonization of clean steel is serious, and at the same time, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/103C04B35/622
CPCC04B35/103C04B35/622C04B2235/3463C04B2235/3826C04B2235/425C04B2235/77C04B2235/96
Inventor 李伟锋李书成高武斌
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP