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Magnesium powder resmelting recovery method

A magnesium powder and remelting technology, applied in the field of magnesium powder remelting and recycling, can solve the problems of large economic losses, impossible recycling, environmental pollution, etc., and achieve the effects of simple method, solving remelting and recycling, and easy operation and production.

Inactive Publication Date: 2003-12-17
HENAN HONGYANG INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of unqualified magnesium powder produced in the production process is destroyed, it will pollute the environment and cause too much economic loss. If it is remelted and recycled, because the metal magnesium powder is very active, it will burn immediately when it encounters a spark, or even explode. remelting technology impossible to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] 1: Magnesium powder pressing

[0012] Weigh 280 kg of magnesium powder, pour about 300 grams of magnesium powder into the inner cavity of the mold each time, start the hydraulic press, and press the magnesium powder into the inner cavity of the mold at a speed of 10mm per second with the mold pressure head, and the magnesium powder is pressed to the density More than 1.60 g / cubic centimeter, keep the pressure under 320Mpa pressure for 3-5 seconds, and press it into block magnesium powder. Use the demoulding device to eject or reversely press out the magnesium powder block. The compressed magnesium powder block is transferred to the next step of refining.

[0013] 2: closed remelting, surface treatment

[0014] Add 42 kg of carnallite flux into the refining tank, raise the temperature of the refining tank to 710°C, put the pressed magnesium powder blocks into the refining tank pre-installed with carnallite flux for refining, the first batch of about 20 kg Magnesium po...

example 2

[0020] 1. Magnesium powder pressing

[0021] Weigh 450 kg of magnesium powder, pour about 500 grams of magnesium powder into the inner cavity of the mold each time, start the hydraulic press, press the magnesium powder into the inner cavity of the mold at a speed of 20mm per second with the mold head, and press the magnesium powder to The density is greater than 1.65 g / cubic centimeter, keep the pressure at 360Mpa for 3-5 seconds, and press it into block magnesium powder. Use the demoulding device to eject or reversely press out the magnesium powder block. The compressed magnesium powder block is transferred to the next step of refining.

[0022] 2: closed remelting, surface treatment

[0023] Add 72 kg of carnallite flux into the refining tank, heat up the refining tank to 710°C, put the pressed magnesium powder blocks into the refining tank pre-installed with carnallite flux for refining, the first batch of about 30 kg Magnesium powder blocks should be fully immersed in c...

example 3

[0029] 1: Magnesium powder pressing

[0030] Weigh 500 kg of magnesium powder, pour about 500 grams of magnesium powder into the inner cavity of the mold each time, start the hydraulic press, press the magnesium powder into the inner cavity of the mold at a speed of 20mm per second with the mold pressure head, and press the magnesium powder to the density More than 1.67g / cubic centimeter, keep the pressure for 3-5 seconds under the pressure of 399Mpa, and press it into block magnesium powder. Use the demoulding device to eject or reversely press out the magnesium powder block. The compressed magnesium powder block is transferred to the next step of refining.

[0031] 2: closed remelting, surface treatment

[0032] Add 100 kg of carnallite flux into the refining tank, raise the temperature of the refining tank to 710°C, put the pressed magnesium powder blocks into the refining tank pre-installed with carnallite flux for refining, the first batch of about 40 kg Magnesium powd...

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Abstract

The present invention relates to a refusion recovery method of magnesium powder, including the following steps: pressing the sub-quality magnesium powder produced in the course of production of magnesium powder into mould, forming refining in refining furnace in which the carnallite solvent, refining agent and magnesium powder are placed, heated to 740 deg.c and melted, standing and cooling, molding, removing surface impurity, soaking with dilute sulfuric acid, washing with clean water and drying by airing. Said invented method is simple and easy to operate, and can ensure quality.

Description

1. Technical field [0001] The invention relates to a method for remelting and recovering magnesium powder. 2. Background technology [0002] Magnesium is a very active metal. Magnesium foil can be ignited with a match at room temperature, and it emits dazzling light when it burns, and the temperature is very high. After this metal is processed into metal magnesium powder, its activity increases sharply and becomes A material with a high deflagration capability. It is used in the military to increase the deflagration capacity of ammunition, and is an essential material for the manufacture of special bombs such as flares and tracers; it is used in the production of fireworks and firecrackers in civilian use. [0003] During the processing of metal magnesium powder, due to its high activity, the dust generated during production is prone to violent explosion and combustion accidents. The book "Magnesium Refining by Pidgeon Method" compiled by Shenyang Aluminum and Magnesium De...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/16C22B26/22
Inventor 胡东蓬刘长东
Owner HENAN HONGYANG INDAL
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