Beryllium oxide crucible for smelting pure beryllium, and preparation method thereof

A technology for beryllium oxide and crucibles, which is applied in the field of beryllium oxide crucibles for pure beryllium smelting and its preparation, can solve the problems of crucibles with poor thermal shock resistance, complicated production methods, and long preparation cycles, etc. The effect of short preparation cycle and simple production method

Inactive Publication Date: 2015-01-28
西北稀有金属材料研究院宁夏有限公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantages of this method are: long process flow, complex production method, long preparation cycle, and poor thermal shock resistance of the prepared crucible.

Method used

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  • Beryllium oxide crucible for smelting pure beryllium, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 1. Preparation of beryllium oxide calcined material

[0019] Add 5kg of pure water to 50kg of beryllium oxide powder, put it in a bag, and use a cold isostatic press to perform compression molding, and control the compression pressure to 800kg (0-800kg for 1 hour, and 800kg for 30 minutes). Calcination: Put the pressed raw material into a graphite crucible and sinter it in an intermediate frequency induction furnace to increase the bulk density of the scale. The calcination process is: The calcined materials are respectively coarsely crushed and finely crushed, and then screened with sieves of three specifications. The specifications of the sieves are 5 cm, 2 cm, and less than 2 cm, respectively, to obtain granular materials in three particle size ranges, that is, particle size 5 ~10mm pellets, 2~5mm pellets and <2mm pellets.

[0020] 2. Preparation of beryllium oxide crucible

[0021] Ingredients: According to the weight ratio of 25%: 55%: 20%, three kinds of beryl...

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Abstract

The invention relates to a beryllium oxide crucible for smelting pure beryllium, and a preparation method thereof. The beryllium oxide crucible for smelting the pure beryllium is formed by using calcined beryllium oxide as a main material, 0.1%-0.5% by weight of phosphoric acid and 3%-10% by weight of pure water as auxiliary materials; mixing the above materials uniformly under stirring; tamping and sintering. According to the invention, calcined beryllium oxide is used as a raw material; phosphoric acid and pure water are used as binding agents; and the beryllium oxide crucible for smelting the pure beryllium is prepared by adopting a tamping forming method. The process flow is short; the production method is simple; a preparation period is short; the prepared pure beryllium crucible has good suddenly-changing temperature resistance and can fully guarantee the purity of beryllium ingots.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting equipment, in particular to a beryllium oxide crucible for pure beryllium smelting and a preparation method thereof. Background technique [0002] Pure beryllium is chemically active, and after melting, it is very easy to undergo substitution reactions with other ceramic crucibles at high temperatures, thereby introducing impurities and reducing the purity of beryllium ingots. Therefore, the crucible for smelting pure beryllium must meet the following conditions: high temperature resistance, high softening temperature under load, and the crucible will not soften and melt when melting metal; the crucible material does not pollute the metal, has good slag resistance, and is not eroded by slag; The thermal shock resistance is better; the crucible has better dimensional stability at high temperature and no deformation. [0003] Due to its high melting point, small thermal expansion...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/08
CPCC04B35/66C04B35/08C04B2235/44C04B2235/5427
Inventor 买学锋苏峰赵克俊冯桂才吕建伟王治兰增强
Owner 西北稀有金属材料研究院宁夏有限公司
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