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Direct-current arc furnace for preparing magnesium oxide single-crystal

A DC electric arc furnace and magnesia technology are applied in the field of electrofusion devices for preparing magnesium oxide single crystals, and DC electric arc furnaces for preparing magnesium oxide single crystals, and can solve the impact of voltage fluctuations in power grids, large electrode consumption, low crystal yield, etc. problems, to achieve the effect of reducing voltage fluctuation and impact on the power grid, reducing electrode consumption, and reducing heat loss

Inactive Publication Date: 2006-01-18
LIAONING ZHONGDA SUPERCONDUCTING MATERIAL
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Problems solved by technology

The main disadvantages of this crystal production device are low thermal efficiency, low crystal yield, large electrode consumption, large voltage fluctuations, and severe impact on the power grid.

Method used

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  • Direct-current arc furnace for preparing magnesium oxide single-crystal
  • Direct-current arc furnace for preparing magnesium oxide single-crystal

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Embodiment Construction

[0011] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0012] The furnace shell has an elliptical cylindrical structure. The inner wall 5 of the furnace shell is made of stainless steel plate, and the outer wall 6 of the furnace shell is made of glass fiber reinforced plastic. There is an air gap 7 between the two layers of furnace shells. At the two focal points of the furnace shell, the power grid supplies power to the DC smelting power supply 1, and the electric energy is transmitted to the graphite electrode 3 through the water-cooled cable 2, and the electrode lifting mechanism 4 can complete the lifting action of the electrode in the furnace.

[0013] In the case of the same raw material and power consumption, the crystal output and quality of the electric arc furnace are greatly improved compared with ordinary electric arc furnaces. In addition, the electric arc furnace ...

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Abstract

The present invention belongs to the field of crystal preparing equipment technology, relates to electrical smelting equipment for preparing magnesia monocrystal, and is especially one magnesia monocrystal preparing DC arc furnace. The arc furnace features the furnace shell structure of double layer elliptic cylinder with air gap; the arc heating system comprising DC smelting power supply, electrode elevating unit and two vertical graphite electrodes; and the vertical furnace body structure. The present invention has greatly raised magnesia monocrystal yield and quality, less impact to the power network and raised electric energy utilization rate. In addition, the present invention is also suitable for producing other kinds of high temperature crystal.

Description

technical field [0001] The invention belongs to the technical field of crystal preparation devices, and relates to an electric melting device for preparing magnesium oxide single crystals, in particular to a DC electric arc furnace for preparing magnesium oxide single crystals. Background technique [0002] Magnesium oxide single crystal has good light transmission, high melting point, low thermal expansion coefficient, high mechanical strength and hardness, and low dielectric loss. It is a rare high-performance material in modern industry. [0003] In current industrial production, a three-phase AC electric arc furnace with a cylindrical furnace body is mainly used to prepare magnesium oxide single crystals. The main disadvantages of this crystal production device are low thermal efficiency, low crystal yield, large electrode consumption, and large voltage fluctuations that seriously impact the power grid. Contents of the invention [0004] The object of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B35/00F27B3/08F27D11/08
Inventor 王宁会王晓臣黄耀范卫东
Owner LIAONING ZHONGDA SUPERCONDUCTING MATERIAL
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