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Long-life desulfurization spray gun refractory piece and preparation process thereof

A desulfurization spray gun and refractory technology, applied in the field of refractory materials, can solve the problems of cracks, falling off steel pipes, and fractures of the spray gun refractory materials, and achieve the effects of reducing the generation of cracks, increasing thermal conductivity, and reducing expansion.

Pending Publication Date: 2021-11-02
JIANGSU ZHENGDA FURNACE CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the damage of the spray gun is mainly caused by cracks or shedding of the refractory material, which causes the molten iron to contact the inner steel pipe, resulting in perforation or fracture.

Method used

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  • Long-life desulfurization spray gun refractory piece and preparation process thereof
  • Long-life desulfurization spray gun refractory piece and preparation process thereof
  • Long-life desulfurization spray gun refractory piece and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A long-lived desulfurization spray gun refractory provided in this embodiment is a carbon-bonded metal plastic refractory material. The particle size composition and addition ratio of each raw material are: 30% of 85 alumina particles with a particle size of 3-1mm, and brown corundum particles with a particle size of 3-1mm 10%, 20% of brown corundum particles with a particle size of 1-0mm, 8% of white corundum fine powder with a particle size of ≤0.088mm, 12% of 95 silicon carbide fine powder with a particle size of ≤0.074mm, 4% of 95 flake graphite with a particle size of ≤0.013mm, 1% of metal aluminum powder with particle size ≤0.088mm, 2% of metal silicon powder with particle size ≤0.088mm, 4% of 75 ferrosilicon alloy powder with particle size ≤0.088mm, 2% of high-temperature asphalt powder with particle size ≤0.10mm, 2% of particle size ≤0.045mm 0.5% boron carbide, 1.5% boron glass with a particle size ≤ 0.10mm, 5% liquid thermosetting phenolic resin with a viscosity...

Embodiment 2

[0030] A long-lived desulfurization spray gun refractory provided in this embodiment is a carbon-bonded metal plastic refractory material. The particle size composition and addition ratio of each raw material are: 35% of brown corundum particles with a particle size of 3-1mm, and 20% of brown corundum particles with a particle size of 1-0mm. %, 8% white corundum fine powder with particle size ≤0.088mm, 15% 97 silicon carbide fine powder with particle size ≤0.074mm, 5% 95 flake graphite with particle size ≤0.013mm, 2% metal aluminum powder with particle size ≤0.088mm, particle size 4% metal silicon powder ≤0.088mm, 2% 75 ferrosilicon alloy powder with particle size ≤0.088mm, 3% high-temperature asphalt powder with particle size ≤0.10mm, 1% boron carbide with particle size ≤0.045mm, liquid thermosetting phenolic resin with viscosity 6200cp 5%.

Embodiment 3

[0032] A long-lived desulfurization spray gun refractory provided in this embodiment is a carbon-bonded metal plastic refractory material. The particle size composition and addition ratio of each raw material are: 5% of burnt gemstone particles with a particle size of 5-3mm, and 10% of burnt gemstone particles with a particle size of 3-1mm %, 28% of 85 alumina particles with a particle size of 3-1mm, 20% of brown corundum particles with a particle size of 1-0mm, 10% of brown corundum fine powder with a particle size of ≤0.088mm, 10% of 95 silicon carbide fine powder with a particle size of ≤0.074mm, 5% of 95 flake graphite with a particle size of ≤0.013mm, 1.5% of metal aluminum powder with a particle size of ≤0.088mm, 1% of metal silicon powder with a particle size of ≤0.088mm, 5% of 75 ferrosilicon powder with a particle size of ≤0.088mm, and 5% of a particle size of ≤0.10mm 2.5% of high-temperature asphalt powder, 0.5% of boron carbide with a particle size of ≤0.045mm, 1% of...

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Abstract

The invention discloses a long-life desulfurization spray gun refractory piece and a preparation process thereof, and relates to the technical field of refractory materials. The refractory piece is a carbon-bonded metal plasticity reinforced refractory material, and comprises the following raw materials by weight: 15-45% of alumina or flint clay, 30-65% of corundum, 5-15% of silicon carbide, 3-5% of crystalline flake graphite, 5-8% of simple substance or composite metal powder, 6-8% of a composite carbon binder, and 0.5-2% of a burning promoting agent. According to the invention, the long-life desulfurization spray gun refractory piece is a carbon-bonded metal plasticity reinforced refractory material, and has high mechanical property and excellent thermal shock resistance, and a carbon-bonded metal plasticity reinforced spray gun refractory piece which is good in thermal shock stability, good in toughness, resistant to erosion, efficient in production and long in service life is obtained.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a long-life desulfurization spray gun refractory and its preparation process. Background technique [0002] In the injection desulfurization process of molten iron pretreatment in the metallurgical industry, the refractory material of the spray gun is generally required. Spray gun desulfurization is mainly carried out in the molten iron ladle, and its principle is to use gas as a carrier to spray desulfurizer into molten iron through a spray gun at high pressure for reactive desulfurization. At present, spray guns are divided into straight guns and trumpet guns. They are a prefabricated part composed of a central steel structure and peripheral pouring refractory materials. The central steel structure is a steel pipe, the inner layer serves as the delivery channel for gas and desulfurizer; the outer layer supports the outer refractory material; the outer wrapped refr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103C04B41/85
CPCC04B35/103C04B41/009C04B41/5001C04B41/85C04B2235/3826C04B2235/402C04B2235/405C04B2235/428C04B2235/3821C04B2235/365C04B2235/48C04B2235/349C04B2235/425C04B2235/5427C04B2235/5436C04B2235/602
Inventor 吴斌汪波吴祝良徐玉林周贇一潘菲
Owner JIANGSU ZHENGDA FURNACE CHARGE
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