Recycled magnesia carbon coating material with strong slag-corrosion resistance and application thereof

A smear, magnesium carbon technology, used in the removal of solid waste, waste treatment and other directions, can solve the problems of reduced porosity, poor disintegration performance, steel infiltration, etc., to reduce production costs and prevent infiltration.

Inactive Publication Date: 2015-07-15
武治宏
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is, aiming at the problems existing in the regenerated magnesia-carbon brick granules produced by the prior art, the present invention provides a regenerated magnesia-carbon smear material with strong slag resistance performance, compared with a magnesia-chromium carbon smear disclosed in CN101550016 The porosity is reduced by more than 10% year-on-year, which effectively prevents the penetration of molten steel and slag. It is applied to the working lining of the sl

Method used

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  • Recycled magnesia carbon coating material with strong slag-corrosion resistance and application thereof
  • Recycled magnesia carbon coating material with strong slag-corrosion resistance and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The regenerated magnesia-carbon smear material with strong anti-slag performance is composed of the following materials by weight percentage: 15% of regenerated granules of waste magnesia-carbon bricks with a particle size of 3mm2 o 3 Micropowder 3%, Al-Mg spinel micropowder with particle size ≦0.047mm 3.5%, soft clay 4.0%, silicon micropowder 2.0%, sodium tripolyphosphate 0.5%, metal silicon powder with particle size ≦0.074mm 0.5%, particle size ≦0.074 mm silicon carbide powder 1.2%, refractory fiber 0.3%, both are weight percentages.

[0039] Such as figure 1 As shown, the regenerated magnesia-carbon smear material with strong slag resistance of the present invention is applied to the construction method of the continuous casting tundish working lining and the upper nozzle cofferdam, comprising the following steps:

[0040] 1) Preparation of regenerated magnesia carbonaceous smear material with strong anti-slag performance: after weighing the above materials accordin...

Embodiment 2

[0047] Others are the same as embodiment 1, the difference is:

[0048] The regenerated magnesia-carbon smear material with strong slag resistance is composed of the following materials in percentage by weight: 10% of regenerated granules of waste magnesia-carbon bricks with a particle size of 3mm2 o 3 Micropowder 5%, Al-Mg spinel powder 5.0% with particle size≦0.047mm, soft clay 3.5%, silicon micropowder 2.5%, sodium tripolyphosphate 0.2%, metal silicon powder with particle size≦0.074mm 1.0%, particle size≦0.074 mm silicon carbide powder 0.7%, refractory fiber 0.1%, both are weight percentages.

[0049] The construction method of applying the regenerated magnesia-carbon smear material with strong slag resistance performance of the present invention to the working lining of the continuous casting tundish and the cofferdam of the upper nozzle comprises the following steps:

[0050] 1) Preparation of regenerated magnesia carbonaceous smear material with strong anti-slag perform...

Embodiment 3

[0057] Others are the same as embodiment 1, the difference is:

[0058] The regenerated magnesia-carbon smear material with strong anti-slag performance is composed of the following materials by weight percentage: 13% of waste magnesia-carbon brick regenerated particles with a particle size of 3mm2 o 3 Micropowder 4%, Al-Mg spinel micropowder with particle size≦0.047mm 4.0%, soft clay 3.8%, silicon micropowder 1.5%, sodium tripolyphosphate 0.5%, metal silicon powder with particle size≦0.074mm 1.0%, particle size≦0.074 mm silicon carbide powder 1.0%, refractory fiber 0.2%, both are weight percentages.

[0059] The construction method of applying the regenerated magnesia-carbon smear material with strong slag resistance performance of the present invention to the working lining of the continuous casting tundish and the cofferdam of the upper nozzle comprises the following steps:

[0060] 1) Preparation of regenerated magnesia carbonaceous smear material with strong anti-slag pe...

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Abstract

The invention relates to a recycled magnesia carbon coating material with strong slag-corrosion resistance and an application thereof. The coating material is composed of the following materials by weight percentage: 10-15% of waste magnesia carbon brick regenerated granule material with the granularity of not less than 3mm and not more than 5 mm, 25-30% of waste magnesia carbon brick regenerated granule material with the granularity of not less than 1 and not more than 3 mm, 30-35% of magnesite clinker with the granularity of not less than 0.083 mm and not more than 1 mm, 10-12% of fused magnesite micro powder with the granularity of less than or equal to 0.047mm, 3-5% of alpha-Al2O3 micro powder with the granularity of less than or equal to 0.047 mm, 3.5-5% of alumina-magnesia spinel micro powder with the granularity of less than or equal to 0.047 mm, 3.5-4.0% of soft clay, 1.5-2.5% of silica powder, 0.2-0.5% of sodium tripolyphosphate, 0.5-1.0% of metal silicon powder with the granularity of less than or equal to 0.074 mm, 0.7-1.2% of silicon carbide powder with the granularity of less than or equal to 0.074 mm, and 0.1-0.3% of refractory fiber. The recycled magnesia carbon coating material with strong slag-corrosion resistance, provided by the invention, is good in slag-corrosion resistance and long in service life, the problems of penetration of steel in the recycled magnesia carbon coating material, the penetration of steel between the upper nozzle and the brick cup, the high cladding temperature of the tundish and the bad disassembly performance are solved, the single packet pouring time is increased by 6h or above and the cladding temperature of the tundish is reduced by 60 DEG C or above.

Description

technical field [0001] The invention relates to a regenerated magnesia-carbon smear material with strong slag resistance and an application thereof, belonging to the technical field of regeneration and utilization of waste magnesia-carbon bricks. Background technique [0002] Using the regenerated magnesia-carbon brick pellets produced by processing waste magnesia-carbon bricks as raw materials, we develop and produce regenerated magnesia-carbon smear materials, which are used for the working lining of continuous casting tundish, which can not only reduce the emission of waste magnesia-carbon bricks, reduce environmental pollution, Moreover, the production cost of the smear can be reduced, thereby reducing the cost of continuous casting refractory materials. However, the recycled magnesia carbonaceous smear material produced by the prior art has poor slag resistance performance and is applied to the working lining of the continuous casting tundish. The temperature of the tu...

Claims

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Application Information

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IPC IPC(8): C04B35/66B09B3/00
CPCY02W30/20
Inventor 武光君武治宏
Owner 武治宏
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