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Nano-micron spherical powder and preparation method and equipment thereof

A spherical powder, nano-micron technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of inability to realize industrial production, difficult to control particle size, complicated process flow, etc., to shorten the process time and improve The effect of spheroidization and simplification of process flow

Active Publication Date: 2021-09-10
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Based on the above problems, the object of the present invention is to provide a nano-micron spherical powder and its preparation method and equipment to solve the serious particle agglomeration phenomenon of nano-micron spherical powder in the prior art, low degree of sphericity, and large particle size. Difficult to control, complex process and long time, unable to realize industrialized production and other problems; to prepare nano-micron spherical metal oxide powder and nano-micron spherical metal oxide powder with good dispersion, narrow particle size distribution, small and uniform particle size, and high purity Metal powder

Method used

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  • Nano-micron spherical powder and preparation method and equipment thereof
  • Nano-micron spherical powder and preparation method and equipment thereof

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preparation example Construction

[0041] figure 1 A schematic flow chart of the method for preparing nano-micron spherical powder in the first embodiment of the present invention is schematically shown. Such as figure 1 As shown, the preparation method of a nano-micron spherical powder provided by the present invention may include: adding additives to the first solution to obtain a precursor solution, and the first solution is a metal salt solution or a plurality of metal salts A mixed solution formed from a solution; the precursor solution is sprayed and pyrolyzed to obtain a nano-micron spherical metal oxide through one-step continuous atomization and thermal decomposition. Wherein, the nano-micron spherical metal oxide is a single metal oxide powder or a composite powder of multiple metal oxides. In this embodiment, the particle size D of the nano-micron spherical metal oxide powder 50 =0.5-1.5μm, spheroidization>95%.

[0042] Further, when the prepared first solution is a mixed solution formed of multi...

Embodiment 11

[0067] First configure 1.5mol / l FeCl 3 solution, adding FeCl 3 The solute mass of the solution is 0.5wt% polyethylene glycol, and then the solution is atomized into fine droplets, which enter the pyrolysis furnace through the air carrier gas to react. The pyrolysis temperature is 700°C, and the carrier gas flow rate is 20L / min , and finally get the nanometer (D 50 =0.8 μm) spherical iron oxide powder. The scanning electron microscope (SEM) figure of this embodiment 11 is as follows Figure 6 As shown, it can be seen that the product obtained in this embodiment has good dispersion and uniformity, and the degree of spheroidization is very high.

Embodiment 12

[0069] First configure 0.1mol / l (NH 4 ) 6 Mo 7 o 24 4H 2 O solution, add (NH 4 ) 6 Mo 7 o 24 4H 2 O solution solute mass of 2wt% ethylene glycol, then atomize the solution into fine droplets, enter the pyrolysis furnace through the nitrogen carrier gas to react, the pyrolysis temperature is 1400 °C, and the carrier gas flow rate is 50L / min, Finally, nanometers (D 50 =1 μm) spherical molybdenum oxide powder.

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Abstract

The invention discloses nano-micron spherical powder as well as a preparation method and equipment thereof. The method comprises the following steps of: adding an additive into a solution, and carrying out spray pyrolysis to obtain nano-micron spherical metal oxide powder. The method comprises the following steps of: carrying out one-step continuous atomization and thermal decomposition by adopting spray pyrolysis, and then carrying out hydrogen reduction to obtain nano-micron spherical metal powder; or carrying out one-step continuous atomization, thermal decomposition and hydrogen reduction in a multi-section temperature zone by adopting spray pyrolysis to directly obtain the nano-micron spherical metal powder. By adopting the method, particle aggregation can be avoided, the balling degree is improved, the technological process and time are shortened, the cost is reduced, and the purpose of industrial production is achieved; and the prepared nano-micron spherical metal oxide and metal powder have the advantages of being good in dispersity, narrow in particle size distribution, small in particle size, uniform in particle size and high in purity.

Description

technical field [0001] The invention relates to the technical field of spray pyrolysis, in particular to a nano-micron spherical powder and a preparation method and equipment thereof. Background technique [0002] The morphology and particle size distribution of the powder directly affect its product performance and become an important technical index to measure the quality of the powder. Nano-micro spherical powder has the characteristics of nano-materials such as high reactivity, quantum size effect and surface area effect, and can be widely used in catalysis, new energy, energy storage and conversion and other fields. [0003] Nano-micro spherical metal oxide powder has the characteristics of nano-materials such as high reactivity, quantum size effect and surface area effect and other special properties, and can be widely used in catalysis, new energy, energy storage and conversion and other fields. At present, the preparation methods of nano-micro spherical metal oxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/34C01G49/06C01G39/02C01F17/218C01F17/10C01F5/06C01F17/224C01G25/02B22F1/00B22F9/30B82Y30/00B82Y40/00
CPCC01B13/34C01G49/06C01G39/02C01F17/218C01F17/10C01F5/06C01F17/224C01G25/02B22F9/30B82Y40/00B82Y30/00C01P2004/03C01P2004/32C01P2004/62C01P2004/61
Inventor 李晓艳王玮玮陈宋璇孙宁磊付云枫
Owner CHINA ENFI ENGINEERING CORPORATION
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