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 the problems that the fluidized reduction process of ultrafine iron oxide is not applicable
Active Publication Date: 2015-02-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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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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[0033] The fluidized bed reactor of the present invention will be further described below by taking three layers of baffles as an example in conjunction with the accompanying drawings.
[0034] as attached figure 1As shown, the fluidized bed reactor has an air inlet 1, an air bucket 2, a gas distribution plate 3, a cylindrical section 5, a circular table section 6, an expansion section 7, a feed inlet 4, a feed inlet 9, a cyclone separation It is composed of a device 12, a circulating material valve 13, a horizontal baffle 11, an agitator 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 material inlet 4 and a material return port 9, a gas distribution plate 3 is provided at the bottom of the cylindrical section 5, a discharge port 5 is provided at the upper section of the...
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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 invention relates to the field of chemical metallurgy, in particular to a fluidized bed reactor for preparing superfine iron powder. Background technique [0002] Due to the small particle size, large specific surface area and high activity of ultra-fine iron powder, there is an increasing demand in high-tech fields such as high-performance powder metallurgy, wastewater treatment, electromagnetic shielding, biomedicine and catalysis, especially in cemented carbide tools In the field of application, iron powder with excellent sintering performance is required. However, it is difficult to produce ultra-fine iron powder by the traditional Hegnas method, atomization and other methods, and it is urgent to develop an ultra-fine iron powder production process suitable for industrial scale. [0003] People are seeking the production method of superfine iron powder always, and the method that can be used for preparing superfine reduced iron powder mainly c...
Claims
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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