Crucible for melting high-purity aluminum and preparation method thereof

A crucible and high-purity technology, applied in crucible furnaces, lighting and heating equipment, furnaces, etc., can solve the problems of inability to apply high-purity alumina to high-efficiency continuous production, and achieve excellent non-wetting properties, high strength, and low expansion coefficient Effect

Active Publication Date: 2019-05-24
聊城鼎硕新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problem that the above-mentioned crucible cannot be used for high-efficiency continuous production of high-purity alumina, the present invention proposes a melting high-purity aluminum crucible with reasonable formula, convenient processing, low cost and high-efficiency continuous production of high-purity alumina. Crucible and its preparation method

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  • Crucible for melting high-purity aluminum and preparation method thereof
  • Crucible for melting high-purity aluminum and preparation method thereof

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Embodiment 1

[0023] Embodiment 1, this embodiment provides a crucible for melting high-purity aluminum and its preparation method

[0024] This embodiment aims to solve the problem that most existing crucibles contain iron oxide, silicon dioxide and other components, while graphite crucibles have poor oxidation resistance, which leads to the inability to produce high-purity alumina by continuous hydrolysis.

[0025] For this reason, the crucible provided in this embodiment includes the following active ingredients in parts by weight: 65 parts of aluminum oxide fine powder with a purity of 99.999%, 10 parts of metallic aluminum fine powder with a purity ≥ 99.995%, 5 parts of aluminum sol, 5 parts of distilled water, wherein the aluminum sol is the aluminum sol formed in the process of producing high-purity alumina by the hydrolysis method, and the high-purity aluminum oxide fine powder used in this embodiment is also the high-purity alumina obtained by the hydrolysis method Of course, high-...

Embodiment 2

[0029] Embodiment 2, this embodiment provides a crucible for melting high-purity aluminum and its preparation method

[0030] This embodiment aims to solve the problem that most existing crucibles contain iron oxide, silicon dioxide and other components, while graphite crucibles have poor oxidation resistance, which leads to the inability to produce high-purity alumina by continuous hydrolysis.

[0031] For this reason, the crucible provided in this embodiment includes the following active ingredients in parts by weight: 85 parts of aluminum oxide fine powder with a purity of 99.999%, 25 parts of metallic aluminum fine powder with a purity of 99.995%, 10 parts of aluminum sol, 10 parts of distilled water, wherein the aluminum sol is the aluminum sol formed in the process of producing high-purity alumina by the hydrolysis method, and of course, the high-purity aluminum oxide fine powder used in this embodiment is also obtained by the hydrolysis method. Alumina, of course, can a...

Embodiment 3

[0035] Embodiment 3, this embodiment provides a crucible for melting high-purity aluminum and its preparation method

[0036] This embodiment aims to solve the problem that most existing crucibles contain iron oxide, silicon dioxide and other components, while graphite crucibles have poor oxidation resistance, which leads to the inability to produce high-purity alumina by continuous continuous hydrolysis.

[0037] Therefore, the crucible provided in this embodiment includes the following active ingredients in parts by weight: 5 parts of aluminum oxide fine powder with a purity of 99.999%, 17.5 parts of metallic aluminum fine powder with a purity of 99.995%, 7.5 parts of aluminum sol, 7.5 parts of distilled water, wherein the aluminum sol is the aluminum sol formed in the process of producing high-purity alumina by the hydrolysis method, and certainly, the high-purity aluminum oxide fine powder used in this embodiment is also obtained by the hydrolysis method. Alumina, of cours...

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Abstract

The invention belongs to the field of equipment for processing high-purity aluminum, and relates to a crucible, in particular to a crucible for smelting high-purity aluminum and a preparation method thereof. The crucible comprises the following ingredients of, by weight, 65-85 parts of aluminum oxide fine powder with the purity being 99.999%, 10-25 parts of fine aluminum powder with the purity being greater than or equal to 99.995%, 5-10 parts of alumina sol and 5-10 parts of distilled water, wherein the alumina sol is formed in the process of producing high-purity aluminum oxide through a hydrolysis method. Compared with the prior art, the crucible for the smelting high-purity aluminum and the preparation method thereof have the advantages and positive effects that highly pure finished products and semi-finished products in the production process of the high-purity aluminum oxide are adopted as most of raw materials of the prepared crucible, and the prepared crucible cannot cause pollution to the products in the smelting process of the high-purity aluminum; and besides, the main ingredients of the prepared crucible are aluminum oxide and aluminum nitride, the problem that a graphite crucible is oxidized in the using process is avoided, and the service life of the crucible is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of high-purity aluminum processing application equipment and relates to a crucible, in particular to a crucible for melting high-purity aluminum and a preparation method thereof. Background technique [0002] Due to its extremely low impurity composition, high-purity alumina is widely used in artificial sapphire, lithium battery separator materials, rare earth luminescent materials and other fields, especially in recent years, the market demand has increased significantly. There are many production methods for high-purity alumina, such as aluminum ammonium sulfate method, aluminum isopropoxide hydrolysis method, etc. The preparation of high-purity alumina by hydrolysis of high-purity metal aluminum is easy to obtain raw materials, low cost, and simple process, especially without pollute the environment and develop rapidly. When aluminum oxide is produced by the atomization hydrolysis method of metal aluminum, it is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/12C22C1/10C22C1/05B22F5/00B22F3/10F27B14/10
CPCB22F3/1007B22F5/00B22F2998/00C22C1/056C22C29/12F27B14/10B22F2201/02
Inventor 高广震
Owner 聊城鼎硕新材料有限公司
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