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Recycling method of foamed magnesium

A recovery method and foam magnesium technology are applied in the recovery field of foam magnesium, which can solve the problems of polluting the environment and harming the human body, and achieve the effects of high recovery rate, low cost, and promoting heterogeneous nucleation.

Inactive Publication Date: 2016-06-15
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the recovery of foamed magnesium to solve the problems of toxic gas, environmental pollution and harm to the human body in the current recovery process of foamed magnesium

Method used

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  • Recycling method of foamed magnesium
  • Recycling method of foamed magnesium

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The first step: clean the surface of the foamed magnesium, dry it until the water evaporates completely, and weigh its mass as 1000g;

[0026] The second step: mix hexachloroethane and 1% pure aluminum powder accounting for 0.3% of the total mass fraction of foamed magnesium, and press it to a density of 2.4g / cm 3 metamorphic block;

[0027] The third step: Put the dried magnesium foam into the crucible, and spread a layer of flux CaF on the surface of the foam magnesium 2 , whose mass is 20% of the mass fraction of foamed magnesium, the temperature of the crucible is raised to 720°C, and the volume ratio of 100:1 is fed into CO 2 and SF 6 Protect the gas, melt the foamed magnesium and keep it warm for 10 minutes to make the melt temperature uniform;

[0028] Step 4: Put in the stirring paddle and stir for 2 minutes at a speed of 200r / min to disperse the slag, and then add the metamorphic block produced in the second step to the melt;

[0029] Step 5: Feed Ar gas (p...

Embodiment 2

[0034] The first step: clean the surface of the foamed magnesium, dry it until the water evaporates completely, and weigh its mass as 1205g;

[0035] The second step: mix hexachloroethane and 2% pure aluminum powder accounting for 0.5% of the total mass fraction of foamed magnesium, and press it to a density of 2.7g / cm 3 metamorphic block;

[0036] The third step: Put the dried magnesium foam into the crucible, and spread a layer of flux CaF on the surface of the foam magnesium 2 , whose mass is 30% of the mass fraction of foamed magnesium, the temperature of the crucible is raised to 720°C, and the volume ratio of 50:1 is fed into the CO 2 and SF 6 The protective gas is used to melt the foamed magnesium and keep it warm for 15 minutes to make the temperature of the melt uniform;

[0037]Step 4: Put in the stirring paddle, and stir at a speed of 300r / min for 3 minutes to disperse the slag, and then add the metamorphic block produced in the second step to the melt;

[0038]...

Embodiment 3

[0041] The first step: clean the surface of the foamed magnesium, dry it until the water evaporates completely, and weigh its mass as 850g;

[0042] The second step: mix hexachloroethane and 1.5% pure aluminum powder accounting for 0.4% of the total mass fraction of foamed magnesium, and press it to a density of 2.5g / cm 3 metamorphic block;

[0043] The third step: Put the dried magnesium foam into the crucible, and spread a layer of flux CaF on the surface of the foam magnesium 2 , whose mass is 15% of the mass fraction of foamed magnesium, the temperature of the crucible is raised to 750°C, and at the same time, SF 6 and CO 2 Protect the gas, melt the foamed magnesium and keep it warm for 10 minutes to make the melt temperature uniform;

[0044] Step 4: Put in the stirring paddle, and stir at a speed of 100r / min for 2 minutes to disperse the slag, and then add the metamorphic block produced in the second step to the melt;

[0045] Step 5: Feed Ar gas (purity 99.999%) int...

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Abstract

The invention provides a recycling method of foamed magnesium. According to the method, the melting temperature of slag is lowered with CaF2 serving as a fluxing agent; then metamorphic blocks formed by mixing and pressing hexachloroethane and aluminum powder are added, and slag conglomeration and metamorphism are performed; and finally, pure molten magnesium is obtained in an argon refining manner, and therefore the foamed magnesium can be recycled. By taking effective measures in the recycling method, the foamed magnesium is successfully recycled, and the recycling rate reaches 80%. While it is guaranteed that the foamed magnesium is successfully recycled, energy consumption in the recycling process is reduced, cost is lowered, the recycling method is safe and environment-friendly and is a recycling method, meeting the production practice requirement, of the foamed magnetism.

Description

technical field [0001] The invention belongs to the field of regeneration of foamed metal materials, in particular to a method for recycling foamed magnesium. Background technique [0002] Foamed magnesium is a porous metal foam containing a large number of uniformly dispersed pores in the magnesium alloy matrix. It has low density, high specific strength and specific stiffness, good damping and vibration reduction, dimensional stability, easy processing and recyclability, etc. It also has excellent filterability, sound absorption and sound insulation, electromagnetic shielding and heat conduction and heat dissipation. . Therefore, magnesium foam has broad application prospects in metallurgy, chemical industry, construction, transportation, machinery manufacturing, aerospace and national defense and military fields. Therefore, in recent years, the research of foamed magnesium has been highly concerned by researchers at home and abroad. [0003] Foamed magnesium has many e...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/22
CPCC22B7/002C22B26/22Y02P10/20
Inventor 赵维民邱传荣夏兴川姜庆
Owner HEBEI UNIV OF TECH
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