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Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core

A technology of carbonyl iron powder and magnetic powder core, which is applied in the field of preparation of ultra-fine carbonyl iron powder for high-performance magnetic powder cores, achieving the effects of improved cost performance, short process and low energy consumption

Active Publication Date: 2007-12-26
JIANGXI YUEAN SUPERFINE METAL
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Problems solved by technology

[0002] Metal magnetic powder core is a kind of soft magnetic material manufactured by powder metallurgy technology. Its special magnetic properties make it have incomparable advantages in many applications. Although high-performance magnetic powder core has a long history, it was mainly used in military industry in the past. It has not been widely used. With the rapid development of the IT industry and the demand for inverter technology and electromagnetic compatibility, the industrialization of metal magnetic powder cores has developed rapidly

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  • Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core

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Embodiment

[0014] Put pure carbon monoxide and iron raw materials in a synthesis kettle, synthesize iron pentacarbonyl under the pressure of 3-9.5 MPa and temperature of 100-200 ° C, and send the liquid iron pentacarbonyl into the storage tank after condensation and gas-liquid separation; Carbonyl iron powder is heated to 100-135°C to make it vaporized, and simultaneously feed pentacarbonyl iron vapor, carbonyl nickel vapor, nitrogen, and ammonia into the decomposition furnace, and the flow rate of raw materials is controlled as pentacarbonyl iron 14-16L / H, carbonyl nickel 0.5-0.6L / H, nitrogen 30-40L / min, ammonia 1-3L / min.

[0015] The temperature in the decomposition furnace is controlled in sections, the temperature in the heating zone I is 180-240°C, the heating zone II is 220-260°C, the heating zone III is 240-280°C, the cooling zone is 100-120°C and the powder collecting bin is 50-70°C, so that the raw materials In the decomposition furnace, the superfine carbonyl iron powder with u...

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Abstract

The invention discloses a manufacture method for high capacity magnetic powder core using superfine carbonyl iron dust that includes the following steps: compounding pure CO and iron raw material in compounding kettle under 3-15MPa pressure and 100-200 degree centigrade to gain iron pentacarbonyl, after taking condensation, gas liquid separation, the liquid iron pentacarbonyl would be sent into tank; pouring iron pentacarbonyl, nickel carbonyl, nitrogen gas, and alkaline air into decomposition furnace, controlling the temperature between 180 and 350 degree centigrade to gain superfine carbonyl iron dust with special electromagnetic property. The invention has the feature of short flow, low energy consumption. The product has wide application field, and high product additional value.

Description

technical field [0001] The invention relates to a preparation method of ultrafine carbonyl iron powder for high-performance magnetic powder cores. Background technique [0002] Metal magnetic powder core is a kind of soft magnetic material manufactured by powder metallurgy technology. Its special magnetic properties make it have incomparable advantages in many applications. Although high-performance magnetic powder core has a long history, it was mainly used in military industry in the past. It has not been widely used. With the rapid development of the IT industry and the demand for inverter technology and electromagnetic compatibility, the industrialization of metal magnetic powder cores has developed rapidly. Carbonyl iron powder is a kind of spherical ultrafine iron particles with a particle size of 0.05-9 microns and a layered structure of onion balls. Different production processes have a great impact on the chemical composition and electromagnetic properties of the pr...

Claims

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Application Information

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IPC IPC(8): B22F9/24H01F1/11
Inventor 李上奎
Owner JIANGXI YUEAN SUPERFINE METAL
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