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Production technique for high-purity nanoscale metal magnesium powder

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

Inactive Publication Date: 2014-11-05
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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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 150 grams of commercially available reagent grade Mg(OH) 2 To prepare a solution, 150 grams of commercially available reagent grade oxalic acid was weighed to prepare a solution. The reactor containing the magnesium hydroxide solution was placed on a magnetic stirrer for stirring, and an external ultrasonic wave instrument was installed with a frequency of 21KHz and an output power of 0.8KW. Oxalic acid solution is added dropwise, and the reaction generates magnesium oxalate. Evaporate the moisture in the reaction solution, and filter to obtain fine crystals of magnesium oxalate. After drying the magnesium oxalate fine grain crystals in the Mawen furnace, place the magnesium oxalate fine grain crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the Mawen furnace under high-temperature gas. The mixture of metal magnesium powder and carbon dioxide gas is obtained, and the gas and solid are separated to obt...

Embodiment 2

[0030] Weigh 150 grams of commercially available reagent grade Mg(OH) 2 To prepare a solution, 150 grams of commercially available reagent grade oxalic acid was weighed to prepare a solution. The reactor containing the magnesium hydroxide solution was placed on a magnetic stirrer for stirring, and an external ultrasonic wave instrument was installed with a frequency of 140KHz and an output power of 0.8KW. Oxalic acid solution is added dropwise, and the reaction generates magnesium oxalate. Evaporate the moisture in the reaction solution, and filter to obtain fine crystals of magnesium oxalate. After drying the magnesium oxalate fine grain crystals in the Mawen furnace, place the magnesium oxalate fine grain crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the Mawen furnace under high-temperature gas. The mixture of metal magnesium powder and carbon dioxide gas is obtained, and the gas and solid are separated to ob...

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 and 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 rpm. An external ultrasonic generator with a frequency of 130KHz and an output power of 0.8KW. Oxalic acid solution is added dropwise, and the reaction generates magnesium oxalate. Evaporate the moisture in the reaction solution, and filter to obtain fine crystals of magnesium oxalate. After drying the magnesium oxalate fine grain crystals at 90°C in the Mawen furnace, place the magnesium oxalate fine grain crystals in a high-purity quartz glass tube, cover both ends with high-purity graphite, and then place them in the Mawen furnace It is gasified at high temperature, the temperature of high temperature gasification is 550°C, and the time of high temperature ga...

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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 in particular relates to a production process of high-purity nano-scale metal magnesium powder. Background technique [0002] Magnesium can be used not only as a reducing agent for the production of rare metals Ti, Zr, Hf and Be, B, but also as an important additive element for alloys, as a nodularizer for ductile iron, and is also widely used in steel desulfurization, aerospace industry, Many fields of national defense and military industry and industrial and agricultural production such as the automobile industry. [0003] Nano-magnesium powder started relatively late in our country, and its systematic development began in the late 1980s. Although some progress has been made, most of them are still in the stage of small-scale trial production and laboratory. At present, only a few companies in the world, such as the United States, can produce this kind of high-purity nano-scale metal...

Claims

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Application Information

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