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Magnesia-carbon material containing spinel-calcium aluminate multiphase material and preparation method thereof

A calcium aluminate and spinel technology, applied in the field of magnesia-carbon refractories, can solve the problems of increasing carbon content and affecting the quality of steel, and achieve improved service life, improved oxidation resistance, good thermal shock stability and slag resistance. The effect of permeability

Inactive Publication Date: 2019-02-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the carbon in the carbon composite material can dissolve into the molten steel at high temperature, the carbon content in the molten steel increases, thus affecting the quality of the steel

Method used

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  • Magnesia-carbon material containing spinel-calcium aluminate multiphase material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A magnesium-carbon material containing spinel-calcium aluminate composite phase material and a preparation method thereof. The preparation method described in this embodiment is:

[0030] Using 75-85wt% magnesia, 1-7wt% spinel-calcium aluminate composite material, 7-12wt% graphite, 4-6wt% aluminum-silicon alloy powder as raw materials, plus the raw materials 5- 8wt% of the binder is stirred evenly, pressed into shape, baked at 150-000° C. for 14-24 hours, and cooled to prepare the magnesium-carbon material containing the spinel-calcium aluminate composite phase material.

[0031] In this example:

[0032] The magnesia is a mixture of fused magnesia particles and fused magnesia fine powder;

[0033] The spinel-calcium aluminate composite material is spinel-calcium aluminate composite material fine powder;

[0034] The binding agent is phenolic resin.

[0035] The magnesium-carbon material containing the spinel-calcium aluminate composite material prepared in this exa...

Embodiment 2

[0037] A magnesium-carbon material containing spinel-calcium aluminate composite phase material and a preparation method thereof. The preparation method described in this embodiment is:

[0038] 85-90wt% of magnesia, 7-10wt% of spinel-calcium aluminate composite material, 2-7wt% of graphite, 1-4wt% of aluminum-silicon alloy powder are used as raw materials, and the raw materials 2~ 5wt% of the binder is stirred evenly, pressed into shape, baked at 200-300°C for 4-14 hours, and cooled to prepare the magnesium-carbon material containing the spinel-calcium aluminate composite phase material.

[0039] In this example:

[0040] The magnesia is a mixture of fused magnesia particles and sintered magnesia fine powder;

[0041] The spinel-calcium aluminate composite material is spinel-calcium aluminate composite material particles;

[0042] The binding agent is phenolic resin.

[0043] The magnesium-carbon material containing the spinel-calcium aluminate composite material prepared...

Embodiment 3

[0045] A magnesium-carbon material containing spinel-calcium aluminate composite phase material and a preparation method thereof. The preparation method described in this embodiment is:

[0046]Using 75-85wt% magnesia, 1-7wt% spinel-calcium aluminate composite material, 7-12wt% graphite, 4-6wt% aluminum-silicon alloy powder as raw materials, plus the raw materials 5- 8wt% of the binder is stirred evenly, pressed into shape, baked at 150-000° C. for 14-24 hours, and cooled to prepare the magnesium-carbon material containing the spinel-calcium aluminate composite phase material.

[0047] In this example:

[0048] The magnesia is a mixture of sintered magnesia particles and sintered magnesia fine powder;

[0049] The spinel-calcium aluminate composite material is a mixture of spinel-calcium aluminate composite material particles and fine powder;

[0050] The binder is asphalt.

[0051] The magnesium-carbon material containing the spinel-calcium aluminate composite material pr...

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Abstract

The invention relates to a magnesia-carbon material containing spinel-calcium aluminate multiphase material and a preparation method thereof. According to the technical scheme, 75-90wt% of magnesite,1-10wt% of spinel-calcium aluminate multiphase material, 2-12wt% of graphite and 1-6wt% of aluminum-silicon alloy powder are adopted as raw materials, the raw materials and a binder which is 2-8wt% ofthe raw materials are evenly stirred, pressing-forming is conducted, baking is conducted at the temperature of 150-300 DEG C for 4-24 h, cooling is conducted, and thus the magnesia-carbon material containing the spinel-calcium aluminate multiphase material is prepared. The magnesia-carbon material is simple in process, and the prepared magnesia-carbon material containing the spinel-calcium aluminate multiphase material has the characteristics of excellent oxidation resistance, thermal shock stability performance and high-temperature breaking strength, and is long in service life, capable of reducing the influence on the carbon content of molten steel and suitable for liners of a metallurgical furnace and a container.

Description

technical field [0001] The invention belongs to the technical field of magnesium-carbon refractory materials. In particular, it relates to a magnesium-carbon material containing spinel-calcium aluminate composite phase material and a preparation method thereof. Background technique [0002] Oxide-non-oxide composite materials are an important direction for the development of refractory materials. 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, adding non-oxide additives, and combining them with carbon binders. Carbon composite refractories. Magnesia carbon bricks are mainly used in the lining of converters, AC electric arc furnaces, DC electric arc furnaces, and slag lines of ladles. As a composite refractory material, magnesia carbon brick has the characteristics of good high temperature resistance, strong slag resistanc...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3222C04B2235/402C04B2235/425C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/602C04B2235/656C04B2235/6567
Inventor 魏耀武陈俊峰李楠
Owner WUHAN UNIV OF SCI & TECH