Composite submerged nozzle and manufacturing method thereof

A manufacturing method and immersion technology, applied in the direction of manufacturing tools, casting equipment, casting melt containers, etc., can solve the problems of low strength, low thermal conductivity, etc., achieve high thermal shock resistance, improve quality, and prevent impurities from adhering Effect

Active Publication Date: 2012-02-01
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0008] The purpose of the present invention is to provide a composite submerged nozzle and its manufacturing method, by introducing aluminum titanate with low expansion coefficient and high thermal shock resistance to replace fused quartz and silicon carbide in the traditional submerged nozzle production materials, the modified Aluminum titanate overcomes the disadvantage of low strength of the material after sintering, so that the submerged nozzle can slow down or prevent the generation of nodules by preventing the generation of SiO wit

Method used

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  • Composite submerged nozzle and manufacturing method thereof
  • Composite submerged nozzle and manufacturing method thereof
  • Composite submerged nozzle and manufacturing method thereof

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0025] see figure 1 , which shows the composite submerged nozzle of the present invention, which includes an outer body 1 , an outer slag segment 2 and an inner layer 3 .

[0026] The manufacturing method of the composite submerged nozzle of the present invention comprises the following steps: 1) the composite submerged nozzle, including the outer layer body, the outer layer slag line section and the inner layer; the composition ratio plug-in of the specific embodiment; 2) according to the proportioning, Mix the material of the outer body, the slag line material of the outer layer and the material of the inner layer evenly, add 8-10% of the phenolic resin binder when adding the above components to the outer layer material, and use a granulator to granulate the raw materials. The granulated material is dried on the drying bed to make it meet the molding...

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Abstract

The invention provides a composite submerged nozzle. The composite submerged nozzle comprises an outer layer body, an outer-layer slag line segment and an inner layer, wherein the outer layer body comprises the following components in percentage by weight: 15-35% of crystalline flake graphite, 35-55% of white corundum, 20-50% of aluminum titanate and 8-10% of an external phenolic resin binding agent; the outer-layer slag line segment comprises the following components in percentage by weight: 15-25% of crystalline flake graphite, 45-85% of zirconium oxide, 0-30% of aluminum titanate and 8-10%of an external phenolic resin binding agent; and the inner layer comprises the following components in percentage by weight: 60-90% of aluminum titanate, 10-40% of corundum and 3-5% of an external alumina gel binding agent.

Description

technical field [0001] The invention relates to a nozzle material and a manufacturing method, in particular to a composite submerged nozzle used in continuous steel casting production and a manufacturing method thereof. Background technique [0002] Submerged nozzle is one of the most critical functional refractory materials in steel continuous casting production, and its use effect directly affects continuous casting efficiency and billet quality. The submerged nozzle is located between the tundish and the mold, and is the only way for molten steel to enter the mold. Therefore, the submerged nozzle protects the molten steel and prevents the possibility of secondary oxidation occurring again when the molten steel contacts oxygen in the air. At the same time, it is designed reasonably The unique nozzle structure can prevent unreasonable air bubbles and bias flow when the molten steel enters the mold, which will affect the quality of the steel. [0003] At present, the materi...

Claims

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Application Information

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IPC IPC(8): B22D41/50C04B35/66C04B35/622
Inventor 杨建华
Owner BAOSHAN IRON & STEEL CO LTD
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