Preparation method of low-carbon magnesia carbon brick

A carbon-magnesia-carbon brick and magnesia technology, which is applied in the field of preparation of low-carbon magnesia-carbon bricks, can solve the problems of reducing slag resistance and thermal shock resistance, and achieve high strength, low environmental pollution, and small gaps

Inactive Publication Date: 2016-06-29
ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing low-carbon magnesia-carbon bricks, which solves the defects that the exist

Method used

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  • Preparation method of low-carbon magnesia carbon brick
  • Preparation method of low-carbon magnesia carbon brick
  • Preparation method of low-carbon magnesia carbon brick

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0045] Example one

[0046] In this embodiment, the composition (parts by weight) of the raw materials of low-carbon magnesia-carbon bricks is: 95 parts of magnesia; 3 parts of micro-powder graphite; 1 part of metal aluminum powder; 2 parts of magnesia-aluminum cement; 1 part of water, The dosing and processing procedures are carried out as described above.

[0047] The magnesia particle size gradation in this example is: 8mm~5mm15wt%; 5mm~3mm25wt%; 3mm~1mm25wt%, 1mm~0.088mm15wt%, 0.088mm~0mm20wt%; the mass percentage of graphite is 98%, and the particle size gradation is: 5~15μm80wt%; the mass percentage of metal Al powder is 98%, the particle size gradation is: 0.088mm~0mm80wt%; MgO and Al 2 O 3 The total mass percentage of the magnesia-aluminum cement is 50% (that is, the ignition weight loss of the magnesium-aluminum cement is 50% at 1050℃), and its particle size is 0.048mm~0mm; the obtained low-carbon magnesia-carbon brick body is dried at 180℃ Bake for 8 hours.

[0048] The o...

Example Embodiment

[0049] Example two

[0050] In this embodiment, the composition (parts by weight) of the raw materials of low-carbon magnesia-carbon bricks is: 90 parts of magnesia; 8 parts of fine graphite; 2 parts of metal aluminum powder; 4 parts of magnesia-aluminum cement; 2 parts of water. The dosing and processing procedures are carried out as described above.

[0051] The magnesia particle size gradation in this example is: 8mm~5mm1wt%; 5mm~3mm30wt%; 3mm~1mm35wt%, 1mm~0.088mm15wt%, 0.088mm~0mm19wt%; the mass percentage of graphite is 98%, and the particle size gradation is: 5~15μm90wt%; the mass percentage of metal Al powder is 98%, the particle size gradation is: 0.088mm~0mm90wt%; MgO and Al 2 O 3 The total mass percentage of the magnesia-aluminum cement is 50% (that is, the ignition weight loss of the magnesium-aluminum cement is 50% at 1050℃), and its particle size is 0.048mm~0mm; the obtained low-carbon magnesia-carbon brick body is dried at 200℃ Bake for 10 hours.

[0052] The obtaine...

Example Embodiment

[0053] Example three

[0054] In this embodiment, the composition (parts by weight) of the raw materials of low-carbon magnesia-carbon bricks is: 92 parts of magnesia; 5 parts of fine graphite; 1 part of metal aluminum powder; 3 parts of magnesia-aluminum cement; 2 parts of water, The dosing and processing procedures are carried out as described above.

[0055] The magnesia particle size gradation in this example is: 8mm~5mm10wt%; 5mm~3mm20wt%; 3mm~1mm30wt%, 1mm~0.088mm25wt%, 0.088mm~0mm15wt%; the mass percentage of graphite is 98%, and the particle size gradation is: 5~15μm85wt%; the mass percentage of metal Al powder is 98%, the particle size gradation is: 0.088mm~0mm85wt%; MgO and Al 2 O 3 The total mass percentage of the magnesia-aluminum cement is 50% (that is, the ignition weight loss of the magnesium-aluminum cement is 50% at 1050℃), and its particle size is 0.048mm~0mm; the obtained low-carbon magnesia-carbon brick body is dried at 190℃ Bake for 9 hours.

[0056] The obtain...

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Abstract

Provided is a preparation method of a low-carbon magnesia carbon brick. The method comprises the following steps that all raw materials of the low-carbon magnesia carbon brick are added and mixed, the raw materials are sequentially subjected to compression molding and baking, and the low-carbon magnesia carbon brick is obtained, wherein the low-carbon magnesia carbon brick is prepared from, by weight, 90-95 parts of magnesite clinker, 3-8 parts of micropowder graphite, 1-2 parts of metal aluminum powder, 2-4 parts of magnalium cementing agent and 1-2 parts of water, and the magnalium cementing agent is prepared through complexing by means of a nanotechnology. According to the low-carbon magnesia carbon brick, phenolic resin is not used, the brick is free of toxin and smell, the magnalium cementing agent prepared through complexing by means of the nanotechnology serves as a binding agent, the problem that high-temperature strength of an organic binding agent is low due to the fact that the organic binding agent is oxidized in the reheating process does not exist, the low-carbon magnesia carbon brick can have high strength in the range from room temperature to molten steel temperature, pollution to the environment is low, the low-carbon magnesia carbon brick has ideal strength and density at normal temperature and high temperature, and meanwhile the low-carbon magnesia carbon brick has good thermal-shock resistance stability performance and slag corrosion resistance performance.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a method for preparing low-carbon magnesia-carbon bricks. Background technique [0002] Magnesia-carbon refractories are widely used as lining materials in various steelmaking furnaces due to their excellent slag resistance and stable thermal shock resistance. In general, the carbon mass percentage of magnesia carbon bricks is between 10% and 20%, which will inevitably cause carbon increase in ultra-low carbon steel during the smelting process. With the advancement of smelting technology, traditional magnesia-carbon bricks can no longer meet the requirements of smelting some special steel types (such as ultra-low carbon steel), so the development and application of low-carbon content magnesia-carbon brick materials have attracted widespread attention. [0003] In the research of traditional low-carbon magnesia-carbon bricks, the carbon content is generally simply reduced, whi...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/63
CPCC04B35/043C04B35/6303C04B2235/402C04B2235/425C04B2235/77C04B2235/96C04B2235/9607
Inventor 尹明强方斌祥马铮罗明喻燕沈明科邬晓滢
Owner ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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