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Ramming material for reducing oxidation of magnesia carbon bricks of electric furnace and preparation and use methods thereof

A technology of magnesia-carbon bricks and ramming materials, which is applied in the field of metallurgy, can solve the problems of low service life and easy oxidation of electric furnace magnesia-carbon bricks, and achieve the effects of improving service life, good practical value, and reducing smelting costs

Active Publication Date: 2020-11-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the problem of easy oxidation of electric furnace magnesia carbon bricks and low service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention also provides a method for preparing the above-mentioned ramming material for reducing the oxidation of electric furnace magnesia-carbon bricks, comprising the following steps: mixing waste magnesia-carbon bricks after crushing, 1% aluminum powder and 2%-3% binder for 3- After 5 minutes, add 7-8% water, stir and mix for 5-6 minutes, and you get it.

[0027] The present invention also provides a method for using the above-mentioned ramming material for reducing the oxidation of electric furnace magnesia-carbon bricks, which includes the following steps: when building an electric furnace, a small amount of filling is used between the magnesia-carbon bricks and the water-cooled wall, and several times Fill the ramming material in the way of ramming, and the filling height of each gap shall not exceed 50mm. After the ramming material is flush with the upper edge of the masonry magnesia-carbon brick, the upper layer of magnesia-carbon bricks shall be bui...

Embodiment 1

[0030] Example 1 Using the ramming material of the present invention to reduce the oxidation of electric furnace magnesia carbon bricks

[0031] When building masonry in a 5KVA DC electric arc furnace in the laboratory, 100 parts of waste magnesia-carbon bricks with a carbon content of 10%; 1 part of aluminum powder, 2 parts of binder, mixed for 4 minutes, added 8% water, and wet mixed for 5 minutes to prepare a ramming material .

[0032] Fill the gap between the magnesia-carbon brick and the water cooling, and remove the magnesia-carbon brick after 10 days of smelting to detect the carbon content at the tail of the magnesia-carbon brick. The C content is 9.1-10.03%.

Embodiment 2

[0033] Example 2 Using the ramming material of the present invention to reduce the oxidation of electric furnace magnesia carbon bricks

[0034] When building masonry in a 5KVA DC electric arc furnace in the laboratory, 100 parts of waste magnesia-carbon bricks with a carbon content of 12%; 1 part of aluminum powder, 2 parts of binder, mixed for 4 minutes, added 8% water, and wet mixed for 5 minutes to prepare a ramming material .

[0035] Fill the gap between the magnesia-carbon brick and the water cooling, and remove the magnesia-carbon brick after 10 days of smelting to detect the carbon content at the tail of the magnesia-carbon brick. The C content is 9.3% to 10.4%.

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a ramming material for reducing the oxidation of magnesia carbon bricks of an electric furnace and preparation and use methods thereof. Aiming at the problems that the magnesia carbon bricks of an electric furnace are easy to oxidize and short in service life, the invention provides the ramming material for reducing the oxidation of the magnesia carbon bricks, and the ramming material comprises the following components: waste magnesia carbon bricks, aluminum powder accounting for 1% of the weight of the waste magnesia carbon bricks and a binding agent accounting for 2-3% of the weight of the waste magnesia carbon bricks. The invention also provides a preparation method and a use method of the ramming material, the ramming material is filled in the gap between the electric furnace magnesia carbon bricks and a water cooling wall, the oxidation of the electric furnace magnesia carbon bricks can be reduced, the carbon content of the magnesia carbon bricks at the tail part of an electric furnace can be kept at 9.1-10.7%, the service life of the magnesia carbon brick is prolonged, and the electric furnace smelting cost is reduced. The invention provides a brand-new mode for prolonging the service life of an electric furnace, and has a good practical value.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a ramming material for reducing the oxidation of magnesia-carbon bricks in an electric furnace and a preparation and use method thereof. Background technique [0002] Magnesia carbon bricks have the advantages of high melting temperature, strong resistance to slag erosion, good thermal shock resistance, and high thermal conductivity. They are widely used in metallurgical high-temperature equipment such as steelmaking electric furnaces and converters. Since carbon is easy to oxidize, the atmosphere is an important factor affecting the service life of magnesia carbon bricks. Sampling and analysis of magnesia-carbon bricks in a discontinuous electric furnace in Panzhihua Iron and Steel found that the tail of magnesia-carbon bricks near the water wall was oxidized and decarburized, especially the carbon content in the magnesia-carbon bricks in the gap between the two w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21C5/52
CPCC04B35/66C21C5/52C04B2235/3206C04B2235/402C04B2235/422C04B2235/48Y02P10/20
Inventor 齐建玲秦洁李占军田中君
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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