Method for recovering magnesium chips safely

A magnesium chip, safe technology, applied in the field of safe recovery of magnesium chips, can solve the problems of explosion, magnesium chips, easy to burn, etc., and achieve the effects of high safety, reduced risk of explosion, and low production cost

Inactive Publication Date: 2011-06-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent has a good reference value for the recycling of magnesium chips, but it cannot solve the problem that magnesium chips are easy to burn and explode during the processing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the magnesium alloy cutting process, the magnesium chips are collected into CeCl 3 Soaked in 8% aqueous solution for 5 minutes, dried naturally, dried with dry air, and then pressed the magnesium chips into blocks by mechanical pressure method, the size of the block is 300mm×300mm×200mm; when it is recycled and melted, it is directly Add the briquettes to the melting furnace and melt them. After the briquettes begin to melt, slowly stir the molten magnesium together; after the magnesium crumbs are completely melted, the temperature is raised to 740°C, and the RJ-2 solvent with 1.2% of the magnesium crumb mass is added. Refining, slag off, let stand for 10min; adjust the temperature to 720℃, pour into ingots for later use.

Embodiment 2

[0022] Before the magnesium chips are stacked, collect the magnesium chips into CeCl 3 Soak in 15% aqueous solution for 3 minutes, dry it with dry air, and then press the mechanical pressure method to press the magnesium chips into a block, the size of the block is 300mm×200mm×200mm; when it is recycled and melted, it is directly added to Melt in the smelting furnace. After the briquette begins to melt, slowly stir the molten magnesium together; after the magnesium chips are completely melted, the temperature is raised to 720°C, and 1.0% RJ-2 solvent is added for refining and slagging. Let it stand for 10 minutes; adjust the temperature to 700°C, and transfer directly to the casting department for pouring parts.

Embodiment 3

[0024] In the magnesium alloy cutting process, the magnesium chips are collected into CeCl 3 Soak in 20% aqueous solution for 2 minutes, dry it with dry air, and then press the mechanical pressure method to press the magnesium chips into a block, the size of the block is 200mm×200mm×150mm; when it is recycled and melted, it is directly added to Melt in the smelting furnace. After the briquette begins to melt, slowly stir the molten magnesium together; after the magnesium chips are completely melted, the temperature is raised to 730℃, and 0.8% of the mass of magnesium chips is added to the RJ-2 solvent for refining and slagging. Let it stand for 10 minutes; adjust the temperature to 700°C, and pour it into an ingot for later use.

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Abstract

The invention discloses a method for recovering magnesium chips, which aims at improving the safety of magnesium chips recycling, simultaneously increasing recovery utilization ratio of the magnesium chips. The method comprises the following steps in particular: collecting the magnesium chips into water solution with the mass fraction of CeCl3 of 8-20% and soaking for 2-5min in the magnesium alloy cutting process or before stacking the magnesium chips; drying by dry air or other methods; pressing the magnesium chips into lumps by adopting a mechanical pressurizing method; adding the lumpy magnesium chips into a smelting furnace for smelting when in recovery and smelting; slowly stirring after the pressurized lumps start to smelt; heating up to 720-740 DEG C after the magnesium chips are smelted completely; adding refining agent with the magnesium chips mass of 0.8-1.2% for refining, drossing and stewing; adjusting the temperature to 700-720 DEG C; casting into ingots for standby or directly transferring to the casting department of labour to participate in the casting of the magnesium alloy. By adopting CeCl3 process, the invention greatly reduces the risk of explosion, does not need special pressurization to merge the magnesium chip lumps in a molten poll in the melting process, and can successfully realize safe recycling of the magnesium chips.

Description

Technical field [0001] The present invention relates to a method for safely recovering magnesium chips. Specifically, the present invention relates to a method for using CeCl during cutting or before melting. 3 The technical method of solution treatment to safely recover magnesium chips. Background technique [0002] Magnesium alloy is currently the lowest density structural material in engineering applications. Due to its good electromagnetic shielding characteristics, anti-vibration performance, low melting point, and good processability, it is gaining more and more attention in the fields of aviation, automobiles, machinery, and electronics. The more widely used. With the increasing use of magnesium alloys, the recycling of magnesium alloys has been put on the agenda. Among them, the chips formed during the processing of magnesium alloy parts are one of the important components of magnesium alloy recycling. Due to the active chemical properties of magnesium, improper operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22C1/02C22C1/06C22C23/00
CPCY02P10/20
Inventor 陈刚赵玉涛王军张松利
Owner JIANGSU UNIV
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