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Method for producing magnesium calcium ramming material for AOD furnace from waste magnesia-calcium bricks

A technology of waste magnesia-calcium brick and ramming material is applied in the field of refractory material production, which can solve the problems of no application of industrial production, etc., and achieve the effects of saving resources, prolonging the shelf life and reducing production costs.

Active Publication Date: 2017-07-04
辽宁利尔镁质合成材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these studies are currently in the laboratory test stage and have not been applied to industrial production.

Method used

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  • Method for producing magnesium calcium ramming material for AOD furnace from waste magnesia-calcium bricks

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Experimental program
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Effect test

Embodiment 1

[0045] [embodiment 1] produce a kind of magnesia-calcium ramming material by method of the present invention;

[0046] 1. the magnesium-calcium ramming material described in the present embodiment is made up of following raw material by weight ratio:

[0047] Waste magnesia-calcium bricks (20% by weight of CaO): 5-3mm particle size, 30 parts; 3-1mm particle size, 20 parts; 1-mm particle size, 25 parts.

[0048] Fused magnesia (97% by weight of MgO): 200 meshes, 25 parts.

[0049] The binder is composed of the following components in proportion by weight: 1 part of boric acid, 3 parts of vegetable oil, 2 parts of high-temperature asphalt powder, and 1.5 parts of zirconia powder.

[0050] 2. Put the waste magnesia-calcium bricks in a closed container, add waterproofing agent to soak, and add 0.2MPa / cm 2 pressure to achieve pressurized penetration; the water repellent agent uses organic silicon solution; dry after soaking.

[0051] The waste magnesia-calcium brick soaked in the ...

Embodiment 2

[0055] [embodiment 2] produce a kind of magnesium-calcium ramming material by the method for the present invention.

[0056] 1. the magnesium-calcium ramming material described in the present embodiment is made up of following raw material by weight ratio:

[0057] Waste magnesia-calcium bricks (30% by weight of CaO): 5-3mm particle size, 25 parts; 3-1mm particle size, 25 parts; 1-mm particle size, 20 parts.

[0058] Fused magnesia (97% by weight of MgO): 200 meshes, 25 parts.

[0059] The binder is composed of the following components in proportion by weight: 2 parts of boric acid, 3 parts of vegetable oil, 1 part of high-temperature asphalt powder, and 2 parts of zirconia powder.

[0060] 2. Put the waste magnesia-calcium bricks in a closed container, add waterproofing agent to soak, and add 0.3MPa / cm 2 pressure to achieve pressurized penetration; the waterproofing agent uses organic silicon solution, which is naturally dried after soaking.

[0061] The waste magnesia-cal...

Embodiment 3

[0066] According to the method of the present invention, a magnesium-calcium ramming material is produced.

[0067] 1. the magnesium-calcium ramming material described in the present embodiment is made up of following raw material by weight ratio:

[0068] Waste magnesia-calcium bricks (CaO weight percentages are 20% and 30%, according to any ratio): 5-3mm particle size, 20 parts; 3-1mm particle size, 25 parts; 1-mm particle size, 15 parts.

[0069] Fused magnesia (97% by weight of MgO): 200 mesh, 10 parts.

[0070] The binder is composed of the following components in proportion by weight: 4 parts of borax, 5 parts of vegetable oil, 3 parts of high-temperature asphalt powder, and 2 parts of zirconia powder.

[0071] 2. Put the waste magnesia-calcium bricks in a closed container, add waterproofing agent to soak, and add 0.1MPa / cm 2 pressure to achieve pressurized penetration; the waterproofing agent uses organic silicon solution, which is dried after soaking.

[0072] The w...

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Abstract

The invention relates to a method for producing a magnesium calcium ramming material for an AOD furnace from waste magnesia-calcium bricks. The magnesium calcium ramming material comprises 10-30 parts by weight of waste magnesia-calcium bricks having particle sizes of 5 to 3 mm, 10-25 parts by weight of waste magnesia-calcium bricks having particle sizes of 3 to 1 mm, 15-25 parts by weight of waste magnesia-calcium bricks having particle sizes of 1 to 0 mm and 10-25 parts by weight of fused magnesite of 150-200 meshes. The magnesium calcium ramming material also comprises 1.5-12% of a binder on the basis of the above raw material total weight. The waste magnesia-calcium bricks are subjected to water repellent treatment. The method realizes recycling of the waste magnesia-calcium bricks and observably improves water repellent performances of the magnesium calcium ramming material. The magnesium calcium ramming material satisfies refractory material use requirements on an AOD refining furnace, has a long storage life and effectively reduces an enterprise production cost.

Description

technical field [0001] The invention relates to the technical field of refractory production, in particular to a method for producing magnesia-calcium ramming materials for AOD furnaces by using waste magnesia-calcium bricks. Background technique [0002] Magnesium-calcium refractory is a kind of basic refractory material, which has been used as the lining material of steelmaking converter since the early 1960s, and has contributed to the development of my country's converter steelmaking industry. By the end of the 1980s, due to the popularization and application of magnesia-carbon bricks, the amount of magnesia-calcium refractory materials decreased sharply and was almost eliminated. Since the beginning of this century, with the rapid development of stainless steel and clean steel production in China, various magnesia-calcium refractory materials have been re-developed with their unique performance (the function of purifying molten steel), lower prices and advantages in env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/0435C04B35/62204C04B2235/96C04B2235/77C04B2235/483C04B2235/3208C04B2235/3409C04B2235/3418C04B2235/3272
Inventor 张义先董会彬金钊尹斌于慧彬赵东辉张国栋
Owner 辽宁利尔镁质合成材料股份有限公司
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