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Nano Al2O3-SiC composite powder, low-carbon pouring steel ladle sliding plate brick and preparation methods of nano Al2O3-SiC composite powder and low-carbon pouring steel ladle sliding plate brick

A technology of composite powder and sliding brick, which is applied in the field of refractory materials for ladles, can solve the problem of SiC being difficult to mix evenly, and achieve the effects of improving thermal shock stability, improving oxidation resistance, and increasing bulk density and strength

Active Publication Date: 2022-03-01
MAANSHAN LIER KAIYUAN NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For existing Al 2 o 3 -Al in the sliding brick of SiC system 2 o 3 and SiC are difficult to mix evenly, the present invention provides a nano-Al 2 o 3 -SiC composite powder and its preparation method, using gas phase method to prepare nano-Al 2 o 3 Composite powder uniformly dispersed on the surface of SiC fine powder

Method used

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  • Nano Al2O3-SiC composite powder, low-carbon pouring steel ladle sliding plate brick and preparation methods of nano Al2O3-SiC composite powder and low-carbon pouring steel ladle sliding plate brick
  • Nano Al2O3-SiC composite powder, low-carbon pouring steel ladle sliding plate brick and preparation methods of nano Al2O3-SiC composite powder and low-carbon pouring steel ladle sliding plate brick
  • Nano Al2O3-SiC composite powder, low-carbon pouring steel ladle sliding plate brick and preparation methods of nano Al2O3-SiC composite powder and low-carbon pouring steel ladle sliding plate brick

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Experimental program
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Effect test

Embodiment 1

[0069] The composition and weight percentage of the low-carbon poured ladle sliding brick of this embodiment are as follows: the granular material includes 5% of platy corundum particles with a particle diameter of 5-3mm, and 35% of platy corundum particles with a particle diameter of 3-1mm , 23% of fused white corundum particles with a particle size of 1-0mm, the fine powder material includes 10% of fused white corundum fine powder with a particle size of 0-0.045mm, fused magnesia fine powder with a particle size of 0-0.074mm Powder 8%, Nano Al 2 o 3 -SiC composite powder 3%, active α-Al 2 o 3 10% of fine powder, 5% of composite binder, 0.5% of water reducer and 0.5% of explosion-proof agent, the total weight percentage is 100%; plus liquid water accounting for 4% of the total weight. Among them, nano-Al 2 o 3 -Nano Al in SiC composite powder 2 o 3 The mass percentage of SiC fine powder is 4:6; the mass ratio of calcium aluminate cement, silica powder, and hydraulic al...

Embodiment 2

[0082] The composition and weight percentage of the low-carbon poured ladle sliding brick of this embodiment are as follows: the granular material includes 8% of platy corundum particles with a particle diameter of 5-3mm, and 33% of platy corundum particles with a particle diameter of 3-1mm , 20% of fused white corundum particles with a particle size of 1-0mm, the fine powder material includes 14% of fused white corundum fine powder with a particle size of 0-0.045mm, fused magnesia fine powder with a particle size of 0-0.074mm Powder 6%, nano Al 2 o 3 -SiC composite powder 4%, active α-Al 2 o 3 6% of micropowder, 8% of composite binder, 0.5% of water reducer and 0.5% of explosion-proof agent, the total weight percentage is 100%; plus liquid water accounting for 5% of the total weight. Among them, nano-Al 2 o 3 -Nano Al in SiC composite powder 2 o 3 The mass percentage of SiC fine powder is 2:8; the mass ratio of calcium aluminate cement, silica micropowder, and hydrauli...

Embodiment 3

[0095] The composition and weight percentage of the low-carbon poured ladle sliding brick of this embodiment are as follows: the granular material includes 10% of tabular corundum particles with a particle diameter of 5-3mm, and 28% of tabular corundum particles with a particle diameter of 3-1mm , 25% of fused white corundum particles with a particle size of 1-0 mm, the fine powder material includes 12% of fused white corundum fine powder with a particle size of 0-0.045 mm, fused magnesia fine powder with a particle size of 0-0.074 mm Powder 5%, nano Al 2 o 3 -SiC composite powder 5%, active α-Al 2 o 3 8% of fine powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, the total weight percentage is 100%; plus liquid water accounting for 4.5% of the total weight. Among them, nano-Al 2 o 3 -Nano Al in SiC composite powder 2 o 3 The mass percentage of SiC fine powder is 2:8; the mass ratio of calcium aluminate cement, silica micropow...

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Abstract

The invention discloses nano Al2O3-SiC composite powder, a low-carbon pouring steel ladle sliding plate brick and preparation methods of the nano Al2O3-SiC composite powder and the low-carbon pouring steel ladle sliding plate brick, and belongs to the technical field of refractory materials for steel ladles. The nano Al2O3-SiC composite powder is prepared by adopting a gas phase method, Al2O3 is uniformly dispersed on the surface of SiC fine powder, and D50 of Al2O3 is equal to 13nm; the low-carbon pouring steel ladle sliding plate brick is prepared by adding the prepared nano Al2O3-SiC composite powder and adopting a multi-time dispersing, pouring, multi-stage curing, asphalt dipping and dry distillation carbonization process, and the prepared sliding plate brick is high in volume density and strength, good in high-temperature sinterability, thermal shock stability and molten steel and steel slag corrosion resistance, good in thermal shock resistance, good in thermal shock resistance and long in service life. And the service life of the sliding plate brick is prolonged.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for ladles, and more specifically relates to a nano-Al 2 o 3 -SiC composite powder, low-carbon poured ladle sliding brick and their preparation method. Background technique [0002] With the continuous development of steelmaking technology, the flow control system in the die casting or continuous casting steel pouring process basically adopts the sliding nozzle flow control system instead of the stopper rod flow control system. As the most important part of the sliding nozzle system, the slide plate directly controls the flow of molten steel. Under the condition of meeting the requirements of different casting processes, it needs to withstand the chemical erosion and physical erosion of high-temperature molten steel for a long time and repeatedly, and at the same time withstand high thermal shock and mechanical Abrasion effect, the service environment is extremely harsh. The curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/103
CPCC04B35/66C04B35/103C04B2235/3217C04B2235/3826C04B2235/3206C04B2235/3222C04B2235/524C04B2235/3418C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615
Inventor 周亮徐昆波方岩震余西平赵锋
Owner MAANSHAN LIER KAIYUAN NEW MATERIAL
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