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Fluidized bed reactor for preparing ultrafine iron powder

A technology of fluidized bed reactor and ultrafine iron powder, which is applied in the field of chemical industry and metallurgy, and can solve problems such as the unsuitable fluidized reduction process of ultrafine iron oxide

Active Publication Date: 2012-11-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing method for preventing loss of flow is also not suitable for the fluidized reduction process of ultrafine iron oxide

Method used

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  • Fluidized bed reactor for preparing ultrafine iron powder
  • Fluidized bed reactor for preparing ultrafine iron powder
  • Fluidized bed reactor for preparing ultrafine iron powder

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Embodiment Construction

[0033] In the following, the fluidized bed reactor of the present invention will be further described by taking a three-layer baffle as an example in conjunction with the accompanying drawings.

[0034] As attached figure 1 As shown, the fluidized bed reactor has an air inlet 1, a wind hopper 2, a gas distribution plate 3, a cylindrical section 5, a truncated section 6, an enlarged section 7, a feed port 4, a return port 9, and cyclone separation A device 12, a circulating material valve 13, a horizontal baffle 11, a stirrer 8, a stirring blade 10, an air outlet 14 and a material outlet 15. An air inlet 1 is provided at the lower part of the wind bucket 2 for introducing the gas required for the reduction reaction. The lower part of the cylindrical section 5 is provided with a feed port 4 and a return port 9 respectively. The bottom of the cylindrical section 5 is provided with a gas distribution plate 3, the upper section of the cylindrical section 5 is provided with a discharge...

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Abstract

The invention relates to a fluidized bed reactor for preparing ultrafine iron powder, which comprises a gas distribution board (3), a cylindrical section (5), a truncated cone section (6), an expanding section (7), a stirrer (8) and at least one horizontal baffle (11), wherein the horizontal baffle (11) is arranged in the cylindrical section (5) of the reactor, and the center of the horizontal baffle (11) is provided with a hole; the stirrer (8) is arranged on the central axis of the reactor; a stirring shaft of the stirrer (8) penetrates through the hole at the center of the horizontal baffle (11) and extends to the bottom of the cylindrical section (5); and the stirring shaft is provided with at least one set of stirring blades (10), and is positioned in a space formed by the horizontal baffle (11) and the gas distribution board (3). The invention can solve the problem of flow loss due to bonding and growth of agglomerate in the reduction process; and the ultrafine iron powder provided by the invention has very excellent sintering activity.

Description

Technical field [0001] The present invention relates to the field of chemical metallurgy. Specifically, the present invention relates to a fluidized bed reactor for preparing ultrafine iron powder. Background technique [0002] Because of its small particle size, large specific surface area, and high activity, ultra-fine iron powder is in increasing demand in high-tech fields such as high-performance powder metallurgy, wastewater treatment, electromagnetic shielding, biomedicine, and catalysis, especially in cemented carbide tools. Application areas require iron powder with excellent sintering properties. However, it is difficult to produce ultra-fine iron powder by traditional Heganus method, atomization and other methods, and it is urgent to develop an ultra-fine iron powder production process suitable for industrial scale. [0003] People have been looking for the production method of ultrafine iron powder. The methods currently available for preparing ultrafine reduced iron po...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 朱庆山李洪钟宋乙峰吴荣芳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI