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Magnesium and magnesium alloy composite protection fire-proof covering flux and its production method

A technology for covering flux and magnesium alloy, which is applied in the field of metal materials and metallurgy, can solve the problems of unsatisfactory protective effect of foamed magnesium alloy covering agent, violent combustion, oxidation and even combustion of magnesium melt, and achieve excellent protection and flame retardant effect , Improve the slag making ability and improve the protection effect

Inactive Publication Date: 2005-01-26
SHANGHAI AIERSI LIGHT ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the actual production and research process, the magnesium melt sometimes needs to be heated to a high temperature of 760-800 ° C, and the melt often lasts for more than 3 hours at high temperature. At this time, the gas absorption and oxidation of the magnesium melt are particularly serious, even Vigorous combustion, but the RJ series fluxes commonly used at present and the foamed magnesium alloy covering agent introduced by the patent ZL00125301.8 have unsatisfactory protective effects at high temperatures and cannot meet the protection requirements, and the magnesium melt will still undergo violent oxidation or even burn

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Magnesium and magnesium alloy composite protective flame retardant covering flux composition (mass percentage): 70% magnesium chloride, 8% potassium chloride, 7% sodium chloride, 8% calcium chloride, 1% calcium fluoride, 1% magnesium oxide, 1 % cryolite, 1% magnesium carbonate, 3% sodium beryllium fluoride.

[0016] The production method of the flux is as follows: after the crucible is heated to a certain temperature, magnesium chloride, potassium chloride, sodium chloride, magnesium oxide, calcium chloride and cryolite are added, and after the temperature is partially melted, calcium fluoride is added, and the temperature is raised to 750 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 20 sieve. After that, magnesium carbonate and sodium beryllium fluoride are added and mixed with a ball mill. The prepared flux is put into an airtight container for later use.

[0017] When in use, add indust...

Embodiment 2

[0019] Magnesium and magnesium alloy composite protective flame retardant covering flux composition (mass percentage): 50% magnesium chloride, 18% potassium chloride, 7% sodium chloride, 1% calcium chloride, 8% calcium fluoride, 6% magnesium oxide, 5% % cryolite, 4% strontium carbonate, 1% beryllium chloride.

[0020] The production method of this flux is as follows: after the crucible is heated to a certain temperature, magnesium chloride, potassium chloride, sodium chloride, magnesium oxide, calcium chloride and cryolite are added, and after the temperature is raised to partial melting, calcium fluoride is added, and the temperature is raised to 770 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Then add strontium carbonate and beryllium chloride and mix with a ball mill. The prepared flux is put into an airtight container for later use.

[0021] When in use, add industrial pure magnesi...

Embodiment 3

[0023] Magnesium and magnesium alloy composite protective flame retardant covering flux composition (mass percentage): 51% magnesium chloride, 8% potassium chloride, 16% sodium chloride, 3% calcium chloride, 3% calcium fluoride, 7% magnesium oxide, 2 % cryolite, 6% magnesium carbonate, 4% sodium beryllium fluoride.

[0024] The production method of this flux is as follows: after the crucible is heated to a certain temperature, magnesium chloride, potassium chloride, sodium chloride, magnesium oxide, calcium chloride and cryolite are added, after the temperature is raised to partial melting, calcium fluoride is added, and the temperature is raised to 790 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 40 sieve. After that, magnesium carbonate and sodium beryllium fluoride are added and mixed with a ball mill. The prepared flux is put into an airtight container for later use.

[0025] When in use, add...

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PUM

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Abstract

A magnesium and magnesium alloy composite protection fire-retardant covering flux and its manufacturing method are provided. The chemical components of the covering flux are as follows (by weight): 50% to 70% of magnesium chloride, 8% to 18% of potassium chloride, 7% to 16% of sodium chloride, 1% to 8% of calcium chloride,1% to 8% of calcium fluoride,1% to 7% of magnesia, 1% to 5% of fluxing medium cryolite, 0.5% to 6% of carbonate foaming agent, 0.5% to 4% of beryllide fire retardant. The flux provided by the invention has excellent flame retardant property.

Description

technical field [0001] The invention relates to a magnesium and magnesium alloy flux and a production method thereof, in particular to a magnesium and magnesium alloy covering flux with composite protection and flame retardancy to prevent oxidation and combustion during the magnesium alloy smelting process. It belongs to the field of metal materials and metallurgy. Background technique [0002] Magnesium is the lightest of the commonly used metal structural materials, and is widely used in aviation, automobile, electronic information, and machinery industries. But the chemical activity of magnesium is very strong, it is easy to oxidize in the air, and the oxide film formed is loose, which cannot play a protective role, especially at high temperature, the oxidation is intensified, causing combustion. Therefore, reducing and preventing the oxidation and combustion of magnesium alloys is one of the key issues to be solved in the application of magnesium alloys. At present, th...

Claims

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Application Information

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IPC IPC(8): C22B9/10C22C1/06
Inventor 吴国华丁文江
Owner SHANGHAI AIERSI LIGHT ALLOY
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