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Cast refractory material for ladle furnace lining

A refractory material and ladle technology, applied in the field of metallurgy, can solve problems such as high labor intensity, poor seismic performance, and short life, and achieve the effects of low labor intensity, long service life, and low cost

Inactive Publication Date: 2011-11-30
阳谷信民耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to overcome the disadvantages of poor seismic performance, short service life, high labor intensity and high cost of existing ladle linings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1, take the Al that particle size is 10-3mm by weight proportion 2 o 3 - SiC-C brick recycled material, 21 parts; Al with a particle size of 3-1mm 2 o 3 -SiC-C brick recycled material 26 parts; Al with a particle size of 1-0mm 2 o 3 - SiC-C brick recycled material, 19 parts; Al with a particle size of 0.044mm 2 o 3 -SiC-C brick recycled material, 7 parts; alumina fine powder with particle size ≤0.08mm, 8 parts; bauxite fine powder with particle size ≤5μm, 11 parts; silica fine powder, 4 parts; high alumina cement, 3.8 parts%; Sodium hexametaphosphate, 0.2 parts.

[0010] Its production method is: the used Al 2 o 3 - SiC-C bricks are processed by removing impurities, crushing, iron removal, screening, and fine grinding to obtain recycled raw materials with different particle sizes of 10-3mm, 3-1mm, 1-0mm, and 0.044mm; weigh them according to the above weight ratio For various raw materials, first add granules with a size of 1-0 mm or more and mix even...

Embodiment 2

[0012] Embodiment 2, take the Al that particle size is 10-3mm by weight proportion 2 o 3 - SiC-C brick recycled material, 22 parts; Al with a particle size of 3-1mm 2 o 3 - SiC-C brick recycled material, 25 parts; Al with a particle size of 1-0mm 2 o 3 - SiC-C brick recycled material, 21 parts; Al with a particle size of 0.044mm 2 o 3 - SiC-C brick recycled material, 6 parts; bauxite fine powder with particle size ≤ 0.08mm, 11 parts; bauxite fine powder with particle size ≤ 5μm, 8 parts; silica fine powder, 3.6 parts; high alumina cement, 3.1 parts; Sodium metaphosphate, 0.3 parts. The production process and effect are the same as above.

Embodiment 3

[0013]Embodiment 3, take the Al that particle size is 10-3mm by weight proportion 2 o 3 - SiC-C brick recycled material, 24 parts; Al with a particle size of 3-1mm 2 o 3 - SiC-C brick recycled material, 22.9 parts; Al with particle size 1-0mm 2 o 3 - SiC-C brick recycled material, 16 parts; Al with a particle size of 0.044mm 2 o 3 - SiC-C brick recycled material, 10 parts; bauxite fine powder with particle size ≤ 0.08mm, 12 parts; bauxite fine powder with particle size ≤ 5μm, 5 parts; silica fine powder, 5 parts; high alumina cement, 5 parts; Sodium metaphosphate, 0.1 parts. The production process and effect are the same as above.

[0014] The following table is a comparative analysis of the performance of the cast refractory products for ladle furnace lining prepared in the above examples and the high alumina brick products.

[0015] project

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PUM

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Abstract

The invention discloses a casting refractory material for ladle furnace lining, which is characterized in that it is prepared from raw materials with the following weight ratio: Al2O3-SiC-C brick regenerated material with a particle size of 10-3mm, 15-25% ; Al2O3-SiC-C brick recycled material with a particle size of 3-1mm, 20-30%; Al2O3-SiC-C brick recycled material with a particle size of 1-0mm, 15-25%; Al2O3-SiC-C brick with a particle size of 0.044mm C brick recycled material, 5-10%; bauxite powder with particle size ≤0.08mm, 5-15%; bauxite powder with particle size ≤5μm, 5-15%; silica powder, 2-5%; high alumina cement , 2-6%; sodium hexametaphosphate, 0.1-0.3%. The prepared cast refractory material for ladle furnace lining has the characteristics of good thermal shock resistance, good permeability resistance, good corrosion resistance, long service life, low labor intensity, low cost and the like.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a casting refractory material for ladle furnace lining. Background technique [0002] In the steelmaking plant, the ladle is used to transport the molten iron to the converter and electric furnace. Because the molten iron in the ladle does not require special metallurgical processes, the temperature of the molten iron in the ladle is generally 1300-1450°C, which is not too high. When the molten iron ladle is filled with molten iron, the furnace lining of the ladle is subjected to the erosion and wear of high-temperature molten iron and strong thermal shock, resulting in great thermal stress; When the molten iron is scoured and oxidized at high temperature; after the molten iron in the ladle is emptied, the temperature drops sharply to cool the furnace lining rapidly, and at the same time, the furnace lining is exposed to air and oxidized. During the repeated use of the ladle,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 高广震
Owner 阳谷信民耐火材料有限公司