Fire retardant

A flame retardant and said technology, applied in the field of flame retardants, can solve the problems of complex flame retardant process, polluting the environment, poor flame retardant effect of flame retardants, etc.

Inactive Publication Date: 2009-06-03
大连核心铸造技术工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SF 6 The gas protection effect is better, but there are the following problems: (1) pollute the environment, SF 6 The use of gas produces SO 2 , SF 4 and other toxic gases, SF 6 The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: A flame retardant, the weight content of each component is: 45% of cobalt aluminate, 30% of artificial mica, 8% of magnesium chloride, and 17% of potassium chloride. Adding 2% flame retardant by weight of the magnesium alloy to be processed makes the flame retardant cover the surface of the alloy liquid and prevents the contact between the magnesium liquid and air so as to play a protective role. The cobalt aluminate, artificial mica, magnesium chloride, and potassium chloride used in the above flame retardants generally have a particle size of 100 mesh.

Embodiment 2

[0011] Embodiment 2: A flame retardant, the weight content of each component is: 35% of cobalt aluminate, 30% of artificial mica, 16% of magnesium chloride, and 19% of potassium chloride. Adding 3% flame retardant by weight of the treated magnesium alloy makes the flame retardant cover the surface of the alloy liquid, prevents the contact between the magnesium liquid and air and thus plays a protective role.

[0012] The cobalt aluminate, artificial mica, magnesium chloride, and potassium chloride used in the above flame retardants generally have a particle size of 200 mesh.

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PUM

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Abstract

The invention relates to a fire retardant. The fire retardant is characterized by comprising the following components by weight: 35-45% of cobalt aluminate, 25-36% of micanite, 8-16% of magnesium chloride and 14-20% of potassium chloride. A magnesium alloy to be processed is added with 2-5% of the fire retardant which covers the surface of alloy liquid so as to prevent magnesium liquid from contacting with air, thus achieving the effect of fire retardation and protection. The graininess of the cobalt aluminate, the micanite, the magnesium chloride and the potassium chloride adopted in the fire retardant is preferably and generally 100-200 meshes. The cobalt aluminate in the fire retardant has a surface activity effect, is enriched on the surface of the magnesium alloy liquid under the effect of the micanite, which can form a compact composite oxide film on the surface of the magnesium alloy liquid and refine grains of the magnesium alloy structure, thus improving the metallurgical quality of the magnesium alloy liquid and part performance.

Description

technical field [0001] The invention relates to a flame retardant for magnesium alloys and belongs to the technical field of metal materials. Background technique [0002] In the process of magnesium alloy smelting, because magnesium is extremely easy to oxidize and burn, protective measures must be taken for the magnesium alloy liquid during smelting and before pouring. At present, the main methods used are protective flux covering method and gas protection method. The flux protection method is to use a certain composition of low melting point compound flux, which melts into a liquid state at a relatively low temperature and spreads on the surface of the magnesium alloy liquid to prevent the contact between the magnesium liquid and the air and thus play a protective role. The flux protection method is likely to cause pollution of the magnesium alloy liquid and increase the inclusions in the casting. The gas protection method is to cover the surface of the magnesium alloy l...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C23/00
Inventor 刘弘
Owner 大连核心铸造技术工程研究所
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