Start melting device and method for preparing high-purity metallic oxide by using cold crucible

A technology for starting melting and oxides, applied in crucible furnaces, lighting and heating equipment, furnaces, etc., and can solve problems such as high-purity oxide pollution

Active Publication Date: 2014-09-17
RUIWEI TECH TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In theory, these methods can be realized, but in practical application, metal and graphite are difficult to be completely oxidized, and residues are formed in the raw materials, which bring in a large amount of metal elements or carbon elements, thus polluting high-purity oxides

Method used

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  • Start melting device and method for preparing high-purity metallic oxide by using cold crucible
  • Start melting device and method for preparing high-purity metallic oxide by using cold crucible

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Embodiment Construction

[0023] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0024] A start-up melting device for preparing high-purity metal oxides from a cold crucible, the device includes a crucible 2, an electromagnetic induction coil 1 arranged along the circumference of the crucible 2, a graphite rod 3, an alumina ceramic tube 5 and a lifting system, and a graphite rod 3 is set in the crucible 2, the high-purity graphite rod 3 is inserted into the high-purity alumina ceramic tube 5, and the two are connected by alumina ceramic bolts 4. The inner diameter of the alumina ceramic tube 5 is slightly larger than the outer diameter of the high-purity graphite rod 3, and there is a gap between the graphite rod 3 and the alumina ceramic tube 5, which can be 1-2mm. A protective gas (argon) is passed into the tube 5 . On...

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Abstract

The invention relates to a start melting device and method for preparing high-purity metallic oxide by using a cold crucible. The start melting device comprises a crucible, a electro-magnetic induction arranged along the circumference of the crucible, a graphite rod, an alumina ceramic tube and a lifting system, wherein the alumina ceramic tube is connected to the lifting device, the graphite rod is inserted into the high-purity alumina ceramic tube, a gap is reserved between the alumina ceramic tube and the graphite rod, and the alumina ceramic tube and the graphite rod are connected by an alumina ceramic bolt. According to the method, the alumina ceramic tube and the lifting system act on the high-purity graphite rod so as to carry out start melting on high-purity metal oxide, the high-purity graphite rod is protected by using argon gas so as to prevent the high-purity graphite rod from being in direct contact with oxygen, and the high-purity graphite rod is taken out of the cold crucible by using the automatic lifting system after ignition so as to ensure that the start melting material has no residue in raw materials and can be reused, therefore no pollution is caused to the molten high-purity metal oxide.

Description

technical field [0001] The invention belongs to the technical field of cold crucible preparation of high-purity metal oxides, in particular to a start-up melting device and method for cold crucible preparation of high-purity metal oxides. Background technique [0002] It is an effective method to produce high-purity and high-density alumina by electromagnetic induction heating in a cold crucible. The cold crucible is surrounded by dozens of water-cooled metal tubes. The induction coil outside the cold crucible generates an induced electromagnetic field, and the induced electromagnetic field is transparent. Through the gap between the copper tubes, it acts on the raw materials in the cold crucible. If the raw material is a conductor, an induced current can be induced to inductively heat the raw material. [0003] For most metal oxides (such as alumina, magnesia, silicon dioxide), their solid state is non-conductor and cannot be directly heated by induction, while these metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B14/06F27B14/14
Inventor 朱林唐皇哉张清勇
Owner RUIWEI TECH TIANJIN
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