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Magnesia carbon brick with high thermal shock resistance

A stable, magnesia-carbon brick technology, which is applied in the field of metallurgical refractory materials, can solve problems such as inability to continue, resist slag penetration, and alleviate unfavorable expansion stress, and achieve ideal corrosion resistance, ideal erosion resistance, and long service life. Effect

Inactive Publication Date: 2021-05-07
营口东邦环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the carbon content of magnesia-carbon bricks is reduced, and graphite is still introduced in the way traditional magnesia-carbon bricks are used, there will be a problem that the graphite cannot be continuous due to the small amount of graphite, which is very important for resisting slag penetration and relieving expansion stress. is very disadvantageous

Method used

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  • Magnesia carbon brick with high thermal shock resistance
  • Magnesia carbon brick with high thermal shock resistance
  • Magnesia carbon brick with high thermal shock resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A magnesia carbon brick with high thermal shock stability, by weight ratio, includes the following components:

[0024]

[0025] The preparation method of the above-mentioned high thermal shock stability magnesia carbon brick can be implemented according to the following steps:

[0026] (1) Crushing: the large particle raw material 98 fused magnesia and 97 fused magnesia are respectively crushed or pulverized;

[0027] (2) Screening: The processed raw materials are lifted to the screening machine by the bucket elevator, and the fine powders with a particle size of 5-8 mm and a particle size of 3-6 mm are screened according to the particle size. After screening, they meet the specifications. Raw materials enter their respective silos, and raw materials that do not meet the specifications continue to be crushed or milled;

[0028] (3) Batching: After the raw materials in the high-level silo are accurately weighed according to a certain proportion by the batching syste...

Embodiment 2

[0034] A magnesia carbon brick with high thermal shock stability, by weight ratio, includes the following components:

[0035]

[0036] Except that the content of raw materials is different, the preparation method is the same as above.

Embodiment 3

[0038] A magnesia carbon brick with high thermal shock stability, by weight ratio, includes the following components:

[0039]

[0040]

[0041] Except that the content of raw materials is different, the preparation method is the same as above.

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Abstract

The invention belongs to the field of metallurgical refractory materials, and particularly relates to a magnesia carbon brick with high thermal shock resistance in a VOD steel ladle mainly used for smelting high-quality stainless steel, and the magnesia carbon brick comprises the following components in parts by weight: 55-83 parts of 98 fused magnesite with a particle size of 5-8 mm; 13-25 parts of 97 fused magnesite with the particle size of 3-6 mm; 0.5-2.5 of -198 graphite with a particle size of more than or equal to 200 meshes and less than or equal to 300 meshes; 0.3-1.5 parts of boron carbide with a particle size of less than or equal to 0.072 mm; 0.2-0.9 of zirconium oxide with the particle size of less than or equal to 0.072 mm; 0.5 to 2.5 parts of carbon-containing resin powder; and 2.1 to 9.3 parts of phenolic resin. The magnesia carbon brick is high in thermal shock resistance, ideal in slag resistance, high-temperature strength, apparent porosity, oxidation resistance, erosion resistance and erosion scouring resistance and long in service life.

Description

technical field [0001] The invention belongs to the field of metallurgical refractory materials, in particular to a magnesia-carbon brick with high thermal shock stability in a VOD ladle mainly used for smelting high-quality stainless steel. Background technique [0002] Magnesia-carbon bricks are made of high-melting-point basic oxide magnesia (melting point 2800°C) and high-melting-point carbon materials that are difficult to be infiltrated by slag as raw materials, and various non-oxide additives are added. A non-burning carbon composite refractory material combined with a carbonaceous binder. The carbon content of magnesia-carbon bricks in the national standard GB / T22589-2017 of magnesia-carbon bricks ranges from 5% to 18%. The carbon content of magnesia-carbon bricks produced before is within the range of the national standard. Most of the production is magnesia with a carbon content of 14%. carbon bricks. [0003] The carbon mass fraction of traditional magnesia carb...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/0435C04B35/622C04B2235/425C04B2235/3244C04B2235/3821C04B2235/5427C04B2235/5436C04B2235/3217C04B2235/402C04B2235/3826C04B2235/656C04B2235/77C04B2235/96C04B2235/9607C04B2235/9669C04B2235/9684
Inventor 陈学东于林辉陈树村
Owner 营口东邦环保科技股份有限公司