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Continuous casting submerged nozzle

An immersion and nozzle technology, which is applied to casting equipment, casting molten material containers, manufacturing tools, etc., can solve problems such as inability to achieve good results, inconspicuous effects, corrosion resistance, erosion resistance decline, etc., to improve operating efficiency, Effects of overcoming adhesion and clogging, corrosion resistance, and service life improvement

Inactive Publication Date: 2014-05-07
WUXI SHENJIA HYDRAULIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the stabilization of ZrO 2 And zirconium mullite does not contain CaO or fluoride. When the amount of fluoride is added in a small amount, the effect is not obvious. When the amount is large, the corrosion resistance and erosion resistance of the material will be reduced, and a uniform good effect cannot be achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A continuous casting submerged nozzle, the submerged nozzle raw material is composed of the following components in terms of weight percentage: 8 parts of flake graphite, 6 parts of silicon carbide, 3 parts of silicon micropowder, 8 parts of fused silica, 20 parts of fused zirconia mullite 34 parts of white corundum and 5 parts of phenolic resin. The nozzle is formed by mixing and granulating the above raw materials with a cold isostatic press at 155MPa, and firing at 1260°C in a reducing atmosphere.

Embodiment 2

[0014] A continuous casting submerged nozzle, the submerged nozzle raw material is composed of the following components in terms of weight percentage: 10 parts of flake graphite, 4 parts of silicon carbide, 5 parts of silicon micropowder, 6 parts of fused silica, 22 parts of fused zirconia mullite 32 parts, 32 parts of white corundum, 7 parts of phenolic resin, the nozzle is formed by mixing and granulating the above raw materials with a cold isostatic press at 165MPa, and firing at 1220°C in a reducing atmosphere.

Embodiment 3

[0016] A continuous casting submerged nozzle, the submerged nozzle raw material is composed of the following components in terms of weight percentage: 8.5 parts of flake graphite, 5.5 parts of silicon carbide, 3.5 parts of silicon micropowder, 7.5 parts of fused quartz, 20.5 parts of fused zirconia mullite 33.5 parts of white corundum and 5.5 parts of phenolic resin. The nozzle is formed by mixing and granulating the above raw materials with a cold isostatic press at 155MPa, and firing at 1260°C in a reducing atmosphere.

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PUM

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Abstract

The invention discloses a continuous casting submerged nozzle. Raw materials of the submerged nozzle comprise components, by weight percent, 8 to 10 parts of crystalline flake graphite, 4 to 6 parts of silicon carbide, 3 to 5 parts of silica powder, 6 to 8 parts of fused silica, 20 to 22 parts of fused zirconia mullite, 32 to 34 parts of white corundum and 5 to 7 parts of phenolic resin; the above raw materials are formed under 155 to 165 MPa through a cold isostatic press after being performed mixing granulation and baked under 1220 to 1260 DEG C under the reducing atmosphere to form into the nozzle.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy refractory materials, in particular to a continuous casting submerged nozzle. Background technique [0002] Nozzle is one of the most critical functional refractory materials in continuous casting production, and its use effect directly affects continuous casting efficiency and slab quality. The Al that appears in the current aluminum carbon nozzle 2 o 3 The adhesion and clogging on its inner wall have become the key factors affecting the continuous casting production and the life of the nozzle. In recent years, many studies have been carried out on the adhesion mechanism, and it is agreed that changing the material of the nozzle to prevent Al 2 o 3 Clogging has become the main development trend. Japanese patent JPN0.57-71860 introduces that after adding CaO, CaO is rapidly mixed with non-metallic (α-Al 2 o 3 ) react to form low melting point (CaO·Al 2 o 3 and 3CaO·Al 2 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/54B22D11/10C04B35/106
Inventor 沈志坚
Owner WUXI SHENJIA HYDRAULIC TECH
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