Production technique for high-purity nanoscale metal magnesium powder

A production process, metal magnesium technology, applied in the production process field of high-purity nano-scale metal magnesium powder, can solve the problems of complex equipment structure, difficulty in powder collection, inconvenient operation, etc., achieve good separation effect, simple process route design, and easy operation convenient effect

Inactive Publication Date: 2012-10-17
仇晓丰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has complex equipment structure, high cost, inconvenient operation and difficulty in powder collection.

Method used

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  • Production technique for high-purity nanoscale metal magnesium powder

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Effect test

Embodiment 1

[0028] Weigh 150 grams of commercially available reagent grade Mg(OH) 2 To prepare a solution, weigh 150 grams of commercially available reagent grade oxalic acid to prepare a solution. The reactor containing the magnesium hydroxide solution is placed on a magnetic stirrer and stirred with an external ultrasonic wave instrument, the frequency is 21KHz, and the output power is 0.8KW. Add oxalic acid solution dropwise to generate magnesium oxalate. The water in the reaction liquid was evaporated and filtered to obtain fine particle crystals of magnesium oxalate. After drying the magnesium oxalate fine particle crystals in a horse temperature furnace, place the magnesium oxalate fine particle crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the horse temperature furnace To obtain a mixture of metal magnesium powder and carbon dioxide gas, and gas-solid separation to obtain magnesium powder. Magnesium powder particles ...

Embodiment 2

[0030] Weigh 150 grams of commercially available reagent grade Mg(OH) 2 To prepare a solution, weigh 150 grams of commercially available reagent grade oxalic acid to prepare a solution. The reactor containing the magnesium hydroxide solution is placed on a magnetic stirrer and stirred with an external ultrasonic wave instrument, the frequency is 140KHz, and the output power is 0.8KW. The oxalic acid solution is added dropwise to react to generate magnesium oxalate. The water in the reaction liquid was evaporated and filtered to obtain fine particle crystals of magnesium oxalate. After drying the magnesium oxalate fine particle crystals in a horse temperature furnace, place the magnesium oxalate fine particle crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the horse temperature furnace To obtain a mixture of metal magnesium powder and carbon dioxide gas, and gas-solid separation to obtain magnesium powder. Magnesiu...

Embodiment 3

[0032] Weigh 150 grams of commercially available reagent grade Mg(OH) 2 Prepare a 5% solution, weigh 150 grams of commercially available reagent grade oxalic acid to prepare a 5% solution. The reactor containing the magnesium hydroxide solution was placed on a magnetic stirrer and stirred at a stirring rate of 3000 revolutions per minute. The external ultrasound device has a frequency of 130KHz and an output power of 0.8KW. Add oxalic acid solution dropwise to generate magnesium oxalate. The water in the reaction liquid was evaporated and filtered to obtain fine particle crystals of magnesium oxalate. After drying the magnesium oxalate fine particle crystals at 90℃ in a horse temperature furnace, place the magnesium oxalate fine particle crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the horse temperature furnace For high-temperature gasification, the high-temperature gasification temperature is 550°C, and the hi...

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Abstract

The invention belongs to the field of metal powder production, and in particular relates to a production technique for high-purity nanoscale metal magnesium powder. The production process comprises the following steps of: reacting magnesium hydroxide with oxalic acid to generate magnesium oxalate, controlling crystallization by adopting an ultrasonic-assistant crystallization technology with frequency of 21-140KHz under stirring condition after reaction is finished, filtering, conducting high-temperature vaporization to magnesium oxalate to generate nanoscale metal magnesium powder and carbon dioxide gas, and separating by a gas-solid separation technology to obtain nanoscale metal magnesium powder. The prepared magnesium powder has the advantages of small grain size, small grain size distribution range, good crystal form, complete crystal face, high surface activity, large specific surface area and the like.

Description

Technical field [0001] The invention belongs to the field of metal powder processing, and specifically relates to a production process of high-purity nano-level magnesium metal powder. Background technique [0002] Magnesium can be used as a reducing agent for the production of rare metals Ti, Zr, Hf and Be and B. It is also an important alloy addition element and a spheroidizing agent for ductile iron. It is also widely used in steel desulfurization, aerospace industry, The automobile industry and many other fields of national defense, military industry and industrial and agricultural production. [0003] Nano-magnesium powder started late in our country. System development began in the late 1980s. Although some progress has been made, most of them are still in the small-scale trial production and laboratory stages. At present, only a few companies in the world such as the United States can produce this high-purity nano-scale metallic magnesium powder with an annual output of abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30
Inventor 仇晓丰
Owner 仇晓丰
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