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Unfired magnesia carbon brick as well as preparation method and application thereof

A magnesia-carbon brick and magnesia-carbon technology, applied in the field of refractory materials, can solve the problems of poor corrosion resistance, short service life of VOD ladle, poor oxidation resistance and thermal shock resistance, etc., achieve good oxidation resistance and improve corrosion resistance Sexuality, the effect of controlling purity

Inactive Publication Date: 2022-01-18
邯郸市翰润达耐火材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the VOD ladle in the prior art, such as short service life, poor corrosion resistance, oxidation resistance and thermal shock resistance, thereby providing a non-fired magnesia carbon brick and its application

Method used

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Embodiment 1

[0024] This embodiment provides a non-flashed magnesium carbon brick, with a mass fraction, which comprises 4% carbon, 90% magnesium oxide, 3% silica, 1% calcium oxide, and 1% alumina.

[0025] This embodiment also provides the preparation method of the non-flasmagnesium carbon tile including the following steps.

[0026] Take the above raw material, break, mixed, mixed with the above proportion, mixed 2 min in the mixed raw material, then add a complex magnesium aluminum jaw and mix for 10 min, and the mixing speed is 25R / min, and the complex magnesium The amount of aluminum adhesive is 8% of the total mass of the raw material, and then in 1800kg · f / cm. 2 The pressure was formed, and then fired at 100 ° C for 10 h after 10 h, then heated to 150 ° C for 10 h after heating rate of 5 ° C, and finally the temperature above 6 ° C / min was fired after 10 h, fell to room temperature. Get no magnesium carbon bricks.

[0027] Further, the present embodiment also provides the applica...

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PUM

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Abstract

The invention belongs to the technical field of refractory materials, and relates to an unfired magnesia carbon brick as well as a preparation method and application thereof. The unfired magnesia carbon brick comprises the following components of: 2% to 6% of C, 87% to 92 % of MgO, 1% to 5% of SiO2, 1% to 3 % of CaO and 1% to 3 % of Al2O3. In actual production, the unfired magnesia carbon brick provided by the invention is used in a VOD steel ladle, so that the consumption of a refractory material of the steel ladle can be reduced, the service life of the steel ladle is prolonged, the number of vacuum smelting furnaces of the steel ladle is increased to 15 from 3, the service life of the steel ladle is increased to 80 furnaces from 28 furnaces, meanwhile, the production cost is reduced, and the purity of molten steel is favorably controlled. The unfired magnesia carbon brick comprises carbon, magnesium oxide, silicon dioxide, calcium oxide and aluminum oxide in specific quantities, the components are simple and easy to obtain; and when the unfired magnesia carbon brick is used in the VOD steel ladle, the erosion resistance, oxidation resistance and thermal shock resistance of the steel ladle can be remarkably improved.

Description

Technical field [0001] The present invention belongs to the technical field of refractory materials, and more particularly to non-flasmagnesium carbon bricks and preparation methods and applications thereof. Background technique [0002] The main metallurgical function of the VOD vacuum refining furnace has vacuum degassing, blow oxygen removal, alloying and adjusting steel temperature, etc., can smelt bearing steel, alloy structural steel, spring steel, high quality carbon steel and ultra-low carbon stainless steel. The VOD cable has a very strong vacuum degassing ability, so that the hydrogen, oxygen, nitrogen and carbon content in the steel can be guaranteed to the lowest level, and the steel ingredients are precisely adjusted to make the inclusions are fully up and effectively improve the cleanliness of steel. The VOD steel bag does not only have a smelting process, but also the role of transporting the steel liquid, and can also be used as a molten pool device for vacuum ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/04C04B35/66C04B35/622C04B35/64B22D41/02
CPCC04B35/04C04B35/66C04B35/622C04B35/64B22D41/02C04B2235/9607C04B2235/9669C04B2235/9684C04B2235/422C04B2235/3418C04B2235/3208C04B2235/3217
Inventor 李育璋李伟杰肖庆海
Owner 邯郸市翰润达耐火材料有限公司
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