Method for Melting Magnesium and Melting Apparatus

a technology of magnesium melt and melting apparatus, which is applied in the direction of heat treatment apparatus, furnaces, manufacturing tools, etc., can solve the problems of economic damage, reduced magnesium melt amount, and damage to the furnace, so as to increase the flow rate of the cover gas, reduce the cost, and increase the cost
US20070295166A1Inactive Publication Date: 2007-12-27NIPPON SANSO CORP +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NIPPON SANSO CORP
Publication Date
2007-12-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

An object of the present invention is to provide a melting method for magnesium or a magnesium alloy which detects certainly and immediately combustion of a magnesium melt and emits alarm immediately based on the detection results, and extinguishes immediately the magnesium combustion, in order to achieve the object, the present invention provide a method for melting magnesium while supplying a cover gas containing carbon dioxide and a fireproof agent in a furnace for melting magnesium and obtaining a magnesium melt to cover the surface of the magnesium melt, wherein concentration of carbon monoxide in the furnace or gas discharged from the furnace is measured and magnesium combustion in the furnace is detected based on the concentration of carbon monoxide.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a method and a melting apparatus for melting magnesium or a magnesium alloy and obtaining a magnesium melt or a magnesium alloy melt, in which combustion at the surface of the magnesium melt or the magnesium alloy melt is detected and rapidly extinguished.

[0002] Priority is claimed on Japanese Patent Application No. 2005-012580 filed on Jan. 20, 2005, the contents of which are incorporated herein by reference. BACKGROUND ART

[0003] When magnesium or a magnesium alloy (hereinafter “magnesium” means both magnesium and a magnesium alloy in the present invention) is melted in a furnace to obtain a magnesium melt, the vicinity of the surface of the melt has been covered with a cover gas in order to prevent combustion of magnesium at the melt surface.

[0004] Examples of the cover gas include a gas in which a fireproof agent such as sulfur hexafluoride, and sulfur dioxide is diluted with an inactive gas such as nitrogen.

[0005] A rea...

Claims

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