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Magnesium carbon pouring material

A castable, magnesium-carbon technology, applied in the field of magnesium-carbon castables and refractory castables, can solve the problems of poor wettability, large amount of water added to castables, insufficient anti-oxidation and anti-penetration capabilities, and achieve oxidation resistance and Strong anti-permeability, high density, beneficial to the effect of recycling

Inactive Publication Date: 2012-06-20
江苏苏嘉集团新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wettability of the above-mentioned carbon and water, the amount of water added to the castable is relatively large
The magnesium carbon block after casting is not dense enough, resulting in insufficient anti-oxidation and anti-permeation capabilities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A magnesia-carbon castable, including the following process steps, the component ratio is calculated in parts by weight (when percentage is used, the unit is percentage by weight, the same below):

[0020] (1) Breaking the waste magnesia-carbon bricks with the metamorphic layer and steel slag removed into waste brick particles with a maximum particle size of 5mm, the carbon content in the waste carbon-containing refractory bricks is 10%, and the magnesia content is 80%; After the brick particles are rolled on the wheel mill for 60 minutes, the iron is removed by a magnetic separator, and the waste brick particles with a particle size of 3~5mm, 1~3mm and less than 1mm are obtained by screening. After testing, 3~5mm and 1~3mm The carbon content in the waste brick particles is less than 3%, and the carbon content in the waste brick particles smaller than 1mm is 30%; the waste brick particles smaller than 1mm are sent to the winnowing machine for winnowing, and...

Embodiment 2

[0022] Embodiment 2: a magnesium carbon castable, comprising the following process steps, the component ratio is calculated in parts by weight:

[0023] (1) Break the waste magnesia carbon bricks from which the metamorphic layer and steel slag have been removed into waste brick particles with a maximum particle size of 6mm. The carbon content in the used magnesia carbon bricks is 15%, and the magnesium oxide content is 76%; After the brick particles are rolled on the wheel mill for 90 minutes, the iron is removed by a magnetic separator, and the waste brick particles with a particle size of 3~5mm, 1~3mm and less than 1mm are obtained after screening. The carbon content in the waste brick granules is less than 3%, and the carbon content in the waste brick granules less than 1mm is 30%; the waste brick granules less than 1mm are sent to the winnowing machine for winnowing, and the wind speed of the winnowing machine is 20m / s to obtain light components with an average specific g...

Embodiment 3

[0026] Embodiment three: a magnesium carbon castable, comprising the following process steps, the component ratio is calculated by weight parts:

[0027] (1) The waste carbon-containing refractory bricks from which the metamorphic layer and steel slag have been removed are broken into waste brick particles with a maximum particle size of 4mm, and the waste brick particles are rolled on a wheel mill for 65 minutes, and then iron is removed by a magnetic separator and screened Obtain waste brick particles with a particle size greater than 1mm and less than 1mm; send the waste brick particles less than 1mm to the winnowing machine for winnowing, and the wind speed of the winnowing machine is 10m / s to obtain light components with an average specific gravity of ≤2.4 and average specific gravity ≥ 2.8 heavy component; the carbon content in the heavy component is 15%, the magnesium oxide content is 75%, the carbon content in the light component is 60%, and the magnesium oxide content ...

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Abstract

The invention relates to a magnesium carbon pouring material. The magnesium carbon pouring material is characterized in that the component ratio is counted by weight part and the processing steps are as follows: (1) removing deteriorated layers and steel slag from used magnesium carbon bricks, and then crushing, grinding, magnetically separating and screening the magnesium carbon bricks, thereby obtaining waste brick grains being more than 1 mm and less than 1 mm, and sending the waste brick grains being less than 1 mm to an air separating machine so as to perform air separation and obtain the light components with the average weight less than or equal to 2.4 and the heavy components with the average weight more than or equal to 2.8; and (2) mixing 54-92 parts of magnesium sand, 3-15 parts of aluminum oxide powder and / or spinelle powder, 2-25 parts of heavy component and 2.5-6 parts of bonding agent, thereby obtaining the magnesium carbon pouring material. In the invention, the components with magnesium sand clinkers as main ingredients are separated from the waste magnesium carbon bricks; few graphite carbons and bonding agent carbons are also contained in the components; and the components are added into the magnesium carbon pouring material, so that the quantity of water added during the forming process of the magnesium carbon pouring material is lower and the density of the formed material is higher.

Description

technical field [0001] The invention relates to a refractory castable, in particular to a magnesium-carbon castable, which belongs to the technical field of refractory preparation. Background technique [0002] Since the introduction of carbon into refractory products, carbon-containing refractory materials have quickly developed into a remarkable class of excellent materials in refractory materials. However, due to technical problems, the development of carbonaceous materials in the aspect of indeterminate is not very smooth. The main problem of the carbon-containing refractories formed by adding water is that the wettability between carbon and water is poor, and the amount of water added increases sharply during the pouring process, resulting in poor compactness of the product and insufficient oxidation resistance. [0003] With the rapid development of the steel industry, the demand for refractory materials is also increasing. Among them, magnesia carbon bricks for stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张雪松俞晓东
Owner 江苏苏嘉集团新材料有限公司
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