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Pouring forming high life corundum mullite ladle lower nozzle brick and preparation method thereof

A casting molding, mullite brick technology, applied in the field of nozzle bricks, can solve the problems of loose structure, high carbon content, loss, etc., and achieve the effects of good absorption and dissipation, mitigation of damage, and good elastic strain energy.

Inactive Publication Date: 2019-12-03
MAANSHAN LIER KAIYUAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the problem that existing ladle nozzle bricks have high carbon content and lose the carbon in them after high-temperature oxidation, resulting in loose structure, the present invention provides a cast-molded high-life corundum mullite ladle nozzle brick and a preparation method thereof, Uniform texture, improving the thermal shock resistance of nozzle bricks and prolonging the service life

Method used

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  • Pouring forming high life corundum mullite ladle lower nozzle brick and preparation method thereof
  • Pouring forming high life corundum mullite ladle lower nozzle brick and preparation method thereof
  • Pouring forming high life corundum mullite ladle lower nozzle brick and preparation method thereof

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Embodiment 1

[0050] like figure 1 As shown in the process, the preparation method of the pouring-molded high-life corundum-mullite ladle nozzle brick in this embodiment includes the following steps:

[0051] Step S101, according to the proportion by weight of the corundum mullite ladle drain brick raw material components, including aggregate and co-grinding powder, the raw material of the aggregate includes: 88 bauxite particles 25wt%, waste heavy mullite Stone brick recycled particles 40wt%, raw quartz sand particles 5wt%; co-grinding powder raw materials include: fused corundum fine powder 13wt%, waste heavy mullite brick regenerated fine powder 7wt%, α-Al 2 o 3 Micropowder 2wt%, Aiken 95 silicon micropowder 2wt%, CA-70 pure calcium aluminate cement 6wt%, the sum of the weight percentages of each raw material is 100wt%;

[0052] Fused corundum powder, regenerated fine powder of waste heavy mullite bricks, α-Al 2 o3 Micro powder, Aiken 95 silica powder and CA-70 pure calcium aluminate ...

Embodiment 2

[0057] The preparation method of the cast-molded high-life corundum-mullite ladle nozzle brick of this embodiment includes the following steps:

[0058] Step S101, according to the proportion by weight of the raw material components of corundum mullite ladle nozzle bricks, including aggregate and co-grinding powder, the raw materials of the aggregate include: 88 bauxite particles 28wt%, waste heavy mullite Stone brick regenerated particles 37wt%, raw quartz sand particles 5wt%; co-grinding raw materials include: fused corundum fine powder 10wt%, waste heavy mullite brick regenerated fine powder 11wt%, α-Al 2 o 3 Micropowder 2.5wt%, Aiken 95 silicon micropowder 1.5wt%, CA-70 pure calcium aluminate cement 5wt%, the sum of the weight percentages of each raw material is 100wt%;

[0059] Fused corundum powder, regenerated fine powder of waste heavy mullite bricks, α-Al 2 o 3 Micro powder, Aiken 95 silica powder and CA-70 pure calcium aluminate cement are co-ground, and mixed eve...

Embodiment 3

[0064] The preparation method of the cast-molded high-life corundum-mullite ladle nozzle brick of this embodiment includes the following steps:

[0065] Step S101, according to the proportion by weight of the raw material components of corundum mullite ladle nozzle bricks, including aggregate and co-grinding powder, the raw materials of the aggregate include: 30 wt% of 88 bauxite particles, waste heavy mullite Stone brick recycled particles 35wt%, raw quartz sand particles 5wt%; raw materials for co-grinding powder include: fused corundum fine powder 8wt%, waste heavy mullite brick recycled fine powder 14wt%, α-Al 2 o 3 Micropowder 3.5wt%, Aiken 95 silicon micropowder 0.5wt%, CA-70 pure calcium aluminate cement 4wt%, the sum of the weight percentages of each raw material is 100wt%;

[0066] Fused corundum powder, regenerated fine powder of waste heavy mullite bricks, α-Al 2 o 3 Micro powder, Aiken 95 silica powder and CA-70 pure calcium aluminate cement are co-ground, and m...

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Abstract

The invention discloses a pouring forming high life corundum mullite ladle lower nozzle brick and a preparation method thereof, and belongs to the technical field of lower nozzle bricks. The raw materials of aggregate for the lower nozzle brick of a ladle are prepared from 30-40wt% of recycled particles of a waste heavy mullite brick, 20-30wt% of bauxite particles, and 1-10wt% of raw quartz sand particles; the raw materials for co-grinding power are prepared from 2-18wt% of recycled fine powder of the waste heavy mullite brick, 10-20wt% of electrofused corundum fine powder, 1-10wt% of alpha-Al2O3micro powder, 0.5-3.0wt% of silica micro powder, and 3-8wt% of pure calcium aluminate cement; total weight percentage of each raw material is 100%; and in addition, water accounts for 8wt% of totalweight of the raw materials. According to the corundum mullite, thermal shock stability of the ladle lower nozzle brick is improved, and spalling resistance and erosion resistance of slag and moltensteel of the ladle lower nozzle brick are improved.

Description

technical field [0001] The invention belongs to the technical field of nozzle bricks, and more specifically relates to a casting-formed high-life corundum-mullite ladle nozzle brick and a preparation method thereof. Background technique [0002] The ladle sliding nozzle system is composed of a driving device, a mechanical part and a refractory part (namely, the upper and lower sliding plates, and the lower nozzle brick). The working principle of the sliding nozzle system is to make the upper and lower slide bricks slide through the sliding mechanism, thereby driving the opening and closing of the flow steel hole to adjust the flow of molten steel. [0003] At present, the ladle sliding nozzle system mostly adopts machine-formed aluminum-carbon lower nozzle bricks, which use corundum and bauxite as the main raw materials, add an appropriate amount of carbon materials, such as graphite or carbon black, and use phenolic resin as the binder. made. For example, the Chinese pate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/428C04B2235/5427C04B2235/5436C04B2235/6022C04B2235/606C04B2235/77C04B2235/96C04B2235/9615C04B2235/9676
Inventor 陈正常赵锋周亮汪玉娇赵安堂
Owner MAANSHAN LIER KAIYUAN NEW MATERIAL
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