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Sliding brick with carbon nanotube combined with ferrosilicon nitride and preparation method thereof

A carbon nanotube and ferrosilicon nitride technology, applied in the field of refractory materials, can solve the problems of reduced thermal shock resistance and erosion resistance, difficult to meet the continuous casting of clean steel, affecting the cleanliness of molten steel, etc., so as to improve the erosion resistance. , Excellent thermal shock resistance and erosion resistance, the effect of reducing the amount of carbon dissolved

Active Publication Date: 2018-06-08
HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when applied to the continuous casting of clean steel, especially low carbon steel and ultra-low carbon steel, there are still many defects.
For example, the currently used aluminum-zirconium-carbon sliding bricks have a high carbon content, and the carbon is easy to pollute the molten steel during use, affecting the cleanliness of the molten steel, and it is difficult to meet the needs of clean steel continuous casting production
If the carbon content in the aluminum-zirconium-carbon skateboard brick is greatly reduced, it will inevitably lead to a decrease in its thermal shock resistance and erosion resistance, which will affect the life of the skateboard brick, and even lead to serious accidents.

Method used

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  • Sliding brick with carbon nanotube combined with ferrosilicon nitride and preparation method thereof
  • Sliding brick with carbon nanotube combined with ferrosilicon nitride and preparation method thereof
  • Sliding brick with carbon nanotube combined with ferrosilicon nitride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 A sliding brick made of carbon nanotubes combined with ferrosilicon nitride, the raw material composition of the sliding brick is: 55% tabular alumina, 25% white corundum, 4% alumina powder (Model CL370), 15% ferrosilicon nitride, 1% carbon nanotubes, plus PF5323 phenolic resin is 2% of the total composition of the above skateboard brick raw materials.

[0039] Among them, the particle size of ferrosilicon nitride is 320 mesh, and the particle size of carbon nanotube is 490 mesh.

[0040] The tabular alumina includes three different particle sizes: 8 mesh ≤ particle size 1 ≤ 14 mesh, 14 mesh < particle size 2 < 28 mesh, 28 mesh ≤ particle size 3 ≤ 48 mesh, and the weight ratio between them is particle size 1: particle size 2: Granularity 3=3.4:2.4:1.4.

[0041] The white corundum includes two different grain sizes: 0

Embodiment 2

[0055] Example 2 A sliding brick made of carbon nanotubes combined with ferrosilicon nitride, the raw material composition of the sliding brick is: 57% tabular alumina, 18% white corundum, 4% alumina powder (Model CL370), 20% ferrosilicon nitride, 1% carbon nanotubes, plus PF5323 type phenolic resin is 3% of the total composition of the above skateboard brick raw materials.

[0056] Among them, the particle size of ferrosilicon nitride is 325 mesh, and the particle size of carbon nanotube is 500 mesh.

[0057] The tabular alumina includes three different particle sizes: 8 mesh ≤ particle size 1 ≤ 14 mesh, 14 mesh < particle size 2 < 28 mesh, 28 mesh ≤ particle size 3 ≤ 48 mesh, and the weight ratio between them is particle size 1: particle size 2: Granularity 3=3:2:1.

[0058] The white corundum includes two different grain sizes: 0

Embodiment 3

[0062] Example 3 A sliding brick made of carbon nanotubes combined with ferrosilicon nitride, the raw material composition of the sliding brick is: 60% tabular alumina, 15% white corundum, 4% alumina powder (Model CL370), 20% ferrosilicon nitride, 1% carbon nanotubes, plus PF5323 phenolic resin is 5% of the total composition of the above skateboard brick raw materials.

[0063] Among them, the particle size of ferrosilicon nitride is 330 mesh, and the particle size of carbon nanotube is 510 mesh.

[0064] The tabular alumina includes three different particle sizes: 8 mesh ≤ particle size 1 ≤ 14 mesh, 14 mesh < particle size 2 < 28 mesh, 28 mesh ≤ particle size 3 ≤ 48 mesh, and the weight ratio between them is particle size 1: particle size 2: Granularity 3=2.6:1.6:0.6.

[0065] The white corundum includes two different grain sizes: 0

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Abstract

The invention relates to a sliding brick containing ferro-silicon nitride and combining with a carbon nano tube and a preparation method of the sliding brick. The sliding brick is prepared from the following raw materials in percentage by weight: 55 to 60 percent of tabular corundum, 15 to 25 percent of white corundum, 3 to 5 percent of alumina powder, 15 to 20 percent of ferro-silicon nitride, 0.5 to 1.5 percent of carbon nano tube, and an additionally added binding agent is 2 to 5 percent of the total quantity of the raw materials of the sliding brick. The preparation method comprises batching, mixing, mechanical pressing, drying, roasting, oil immersion treatment, light roasting carbonization treatment, hooping, polishing, surface coating and finishing a product. The sliding brick provided by the invention is stable in structure, has excellent thermal shock resistance and erosion resistance, continuous sliding times are many, the service life is long and the popularization is facilitated.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a sliding brick with carbon nanotubes combined with ferrosilicon nitride and a preparation method thereof. Background technique [0002] The sliding nozzle is an essential functional refractory material for steelmaking and continuous casting. The sliding nozzle is a key component of the sliding nozzle. It is a component that directly controls the molten steel and determines the function of the sliding nozzle. It bears a lot of risks and must be foolproof. [0003] Clean steel production technology is one of the cores of contemporary steelmaking technology, and its level represents a country's iron and steel metallurgical industry level to a certain extent. The production of clean steel not only requires the safe and efficient operation of the slide brick materials used, but also avoids the pollution of molten steel. [0004] At present, aluminum-zirconium carbon and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/101
Inventor 徐跃庆李宏宇梁保青徐爱华张江伟张莹
Owner HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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