Method for preparing feeding nozzle for continuous high-purity alumina melting furnace and continuous melting furnace

A technology of high-purity alumina and melting furnaces, which is applied in the direction of furnaces, crucible furnaces, furnace types, etc., can solve the problems of inner tank materials that cannot meet the requirements of use, and achieve high overall reliability, maintain no pollution, and uniform microstructure Effect

Inactive Publication Date: 2012-10-03
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of material called Aluminium nitride (AlN) was developed by Lille University Technologies Inc., which helps create better quality materials that are more durable than traditional ceramics made up mostly of silicon dioxide or other chemicals. It's important because it works well even when exposed to these environments over many years without losing its effectiveness.

Problems solved by technology

This patented technical problem addressed by this patents relates to an improved method for producing pure crystalline alpha aluminium oxide (αA) particles at temperatures above 2200 degrees Celsius without adding any materials like talc or other fillers during manufacturing process.

Method used

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  • Method for preparing feeding nozzle for continuous high-purity alumina melting furnace and continuous melting furnace
  • Method for preparing feeding nozzle for continuous high-purity alumina melting furnace and continuous melting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix 95% hafnium diboride powder with a particle size of less than 2 μm, 4% aluminum oxide with a particle size of less than 1 μm, and 1% carbon powder, and mix it with a phenolic resin solution with an alcohol content of 50% at a ratio of 100:10 Mix evenly, dry at 80°C and make 100μm granulated powder, isostatically press at a pressure of 150Mpa and keep the pressure for 30 minutes to make high-purity alumina continuous melting furnace. The billet is then demolded and fired at 2000°C for 2 hours to make a cylinder with a height of 50mm and a diameter of ?50mm. The inner cavity is a cylindrical funnel. The upper part of the cylindrical funnel is ? , The lower diameter of the cylindrical funnel is a high-purity alumina continuous melting furnace with a diameter of ?5mm.

[0016] The purity of the batching raw materials used in the experiment is industrial pure.

Embodiment 2

[0018] Mix 89% of hafnium diboride powder with a particle size of less than 2 μm, 8% of aluminum oxide with a particle size of less than 1 μm, and 3% of carbon powder, and mix it with a phenolic resin solution with an alcohol content of 50% at a ratio of 100:10 Mix evenly, dry at 80°C and make 200μm granulated powder, press isostatic pressing under pressure of 150Mpa and keep the pressure for 30 minutes to press into high-purity alumina continuous melting furnace feeding nozzle The green body is then demoulded and fired at 1800°C for 2.5 hours to make a cylinder with a height of 75mm and a diameter of ?150mm. The inner cavity is a cylindrical funnel. The upper diameter of the cylindrical funnel is ? The feeding nozzle for the high-purity alumina continuous melting furnace with a diameter of ?7mm at the lower part of the cylindrical funnel.

[0019] The purity of the batching raw materials used in the experiment is industrial pure.

Embodiment 3

[0021] Mix 78% of hafnium diboride powder with a particle size of less than 2 μm, 17% of aluminum oxide with a particle size of less than 1 μm, and 5% of carbon powder, and mix it with a phenolic resin solution with an alcohol content of 50% at a ratio of 100:10 Mix evenly, dry at 80°C and make 300μm granulated powder, isostatically press at a pressure of 150Mpa and hold the pressure for 30 minutes to press into a high-purity alumina continuous melting furnace feeding nozzle The green body is then demoulded and fired at 1600°C for 3 hours to make a cylinder with a height of 100mm and a diameter of ?200mm. The inner cavity is a cylindrical funnel. The upper diameter of the cylindrical funnel is ? Feeding nozzle for high-purity alumina continuous melting furnace with a diameter of ?10mm at the lower part of the cylindrical funnel.

[0022] The purity of the batching raw materials used in the experiment is industrial pure.

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Abstract

The invention discloses a method for preparing a feeding nozzle for a continuous high-purity alumina melting furnace. The continuous high-purity alumina melting furnace consists of a cooling water jacket furnace shell 1, a carbon fiber heat insulation material 2, a ceramic inner container seat 3, graphite heating elements 4, a ceramic inner container 5, the feeding nozzle 6, a furnace body upper cover 7, an upper cooling cavity 8, a hearth 9, a lower cooling cavity 10 and a furnace body lower cover 11, wherein a cooling water jacket is adopted in the cooling water jacket furnace shell; and the feeding nozzle for the continuous high-purity alumina melting furnace is made of a composite material prepared from reactive sintered aluminum nitride and hafnium boride and used at the temperature of between 1,600 and 2,200 DEG C in the atmosphere of nitrogen. The feeding nozzle for the continuous high-purity alumina melting furnace have the advantages of uniform microstructure, high strength, high overall reliability, high oxidation resistance, high-purity alumina pollution prevention, capability of being used for long time at the temperature of 2,200 DEG C, continuous production, high production efficiency and the like.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV OF TECH
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