Recycling method of waste foamed magnesium

A technology for filtering waste foam and foam ceramics, applied in the direction of improving process efficiency, can solve problems such as complex process, harm to human health, environmental pollution, etc., and achieve the effect of simple process and environmental protection.

Inactive Publication Date: 2016-12-14
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a foamed magnesium recovery and recycling system that solves the above-mentioned problems in the current recovery process of foamed magnesium, such as low purity, complicated process, high cost, generation of toxic gas that is harmful to human health, and pollution to the environment. method

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Cut the waste foamed magnesium into 20mm×20mm×10mm blocks. The cut blocks are ultrasonically oscillated with acetone for 20 minutes, then cleaned with alcohol, and finally dried with a hair dryer. Weigh 500g of dried waste foamed magnesium ;

[0028] Step 2: Preheat the crucible to 400°C in a resistance furnace, then put the waste magnesium foam weighed in the first step into the preheated crucible, raise the temperature to 650°C, and feed the protective gas at the same time, (selected protective gas The volume ratio in air:CO 2 :C 2 h 2 f 4=375:124:1; the composition of the shielding gas in the fourth step below is the same), and the waste foamed magnesium is melted and then incubated for 5min;

[0029] Step 3: Stop passing the protective gas, use the rotary nozzle to inject argon gas into the melt, the ventilation speed is 5L / min, the rotation speed of the nozzle is 240r / min, the time is 3min, and then stand still for 8min, and then remove the melt inclus...

Embodiment 2

[0037] Step 1: Cut waste magnesium foam into blocks of 10mm×10mm×10mm. The cut blocks are ultrasonically oscillated with acetone for 30 minutes, then cleaned with alcohol, and finally dried with a hair dryer. Weigh 500g of dried waste magnesium foam ;

[0038] Step 2: Preheat the crucible to 450°C in a resistance furnace, then put the waste magnesium foam weighed in the first step into the preheated crucible, raise the temperature to 680°C, and feed the protective gas at the same time, (selected protective gas The volume ratio of the air:CO 2 :C 2 h 2 f 4 =150:49:1, the composition of the shielding gas in the fourth step below is the same) after the waste foamed magnesium is melted, it is kept for 10min;

[0039] Step 3: Stop passing the protective gas, use the rotary nozzle to inject argon gas into the melt, the ventilation speed is 8L / min, the rotation speed of the nozzle is 360r / min, the time is 5min, and then stand still for 10min, and then remove the melt inclusions ...

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Abstract

The invention relates to a recycling method of waste foamed magnesium. The method comprises the following steps: first step, cutting the waste foamed magnesium into blocks, and cleaning and drying the blocks; second step, preheating a crucible in a resistance furnace to the temperature of 400-450 DEG C, then heating to the temperature of 650-680 DEG C, meanwhile feeding protective gas, and insulating after the waste foamed magnesium is melted; third step, feeding argon in the melt by using a rotary sprayer; and fourth step, feeding the protective gas for 5 minutes, filtering the melt obtained in the third step by using a foamed ceramic filter disc, and pouring into ingots. Effective measures are taken to successfully recycle the waste foamed magnesium, and the magnesium ingots of which the recovery rate reaches up to 85% are obtained. In addition, the recycling method of the waste foamed magnesium is simple in process, safe and environmentally friendly, high in operability, low in price and high in quality of the cast ingots, and meets requirements of sustainable development; and production can be realized.

Description

technical field [0001] The invention belongs to the field of regeneration and casting of porous metal materials, and in particular relates to a recycling and recasting method of foamed magnesium. Background technique [0002] Magnesium foam has the characteristics of low density, high specific strength and specific stiffness, strong energy absorption and vibration reduction and electromagnetic shielding ability, good sound insulation and sound absorption effect, and biocompatibility. It is widely used in transportation, aerospace, construction, biomedicine and It has broad application prospects in the field of defense industry. Therefore, the research and development of magnesium foam has received more and more attention. [0003] In recent years, the recycling and reuse of waste metal materials has been widely valued, and has developed rapidly at home and abroad with the characteristics of low investment, low consumption, low cost, and low pollution. Due to the extensive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/22
CPCC22B7/002C22B26/22Y02P10/20
Inventor 赵维民姜庆夏兴川邱传荣王晶张赞费鹏扬
Owner HEBEI UNIV OF TECH
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