CN100522424C - Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core - Google Patents
Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core Download PDFInfo
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- CN100522424C CN100522424C CNB2007100292033A CN200710029203A CN100522424C CN 100522424 C CN100522424 C CN 100522424C CN B2007100292033 A CNB2007100292033 A CN B2007100292033A CN 200710029203 A CN200710029203 A CN 200710029203A CN 100522424 C CN100522424 C CN 100522424C
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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
The present invention relates to a kind of preparation method of superfine carbonyl iron powder in use for high performance magnetic powder core.
Background technology
Metal magnetic powder core is a kind of soft magnetic materials that adopts PM technique to make, its special magnetic property makes it have the advantage that other material hardly matches in many application scenarios, though high-performance magnetic core is with a long history, but be mainly used in military project in the past and be not used widely, along with the IT industry develop rapidly, be accompanied by the demand of inversion transformation technique and Electro Magnetic Compatibility, the metal magnetic powder core industrialization is developed rapidly.Carbonyl iron dust is the spheroidal superfine iron particle that a kind of particle diameter has onion ball layer structure for the 0.05-9 micron, and different production technologies is huge to the chemical composition and the electromagnetic performance influence of product.Therefore, study new process, improve the electromagnetic performance and the applicability that improve product, reduce production costs, the cost performance that improves ferrocart core is just becoming the emphasis problem of people's research.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of preparation method of superfine carbonyl iron powder in use for high performance magnetic powder core, this method will be decomposed, compound coating and passivation three step process integrate, the product electromagnetic performance of producing is good, reduced energy consumption, reduce production cost significantly, thereby improved the cost performance of magnetic core.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of preparation method of superfine carbonyl iron powder in use for high performance magnetic powder core, it is characterized in that this method be with pure carbon monoxide and iron material in synthesis reactor, the synthetic iron pentacarbonyl that generates under the temperature of the pressure of 3～15MPa and 100～200 ℃, through condensation, gas-liquid separation, the liquid iron pentacarbonyl is sent storage tank to; In dore furnace, feed iron pentacarbonyl, carbonyl nickel, nitrogen, ammonia simultaneously, temperature is between 160～350 ℃ in the control dore furnace, generate compound evenly, the superfine iron carbonyl powder with special electromagnetic performance, and in dore furnace, Passivation Treatment in the stove is carried out on the carbonyl iron dust surface that generates.
The flow-control of above-mentioned iron pentacarbonyl is 12-22L/H, carbonyl nickel 0.5-4L/H, nitrogen 30-80L/min, ammonia 1-6L/min.
The above-mentioned Passivation Treatment that the carbonyl iron dust surface is carried out, specifically be that the compound carbonyl iron dust after decomposing is placed in the airtight collection powder storehouse, logical as argon gas or nitrogen oxygenous 0.1-0.5% are handled, and make the surface generate one deck passivating film as thin as a wafer, to prevent to meet further oxidation of air or spontaneous combustion.
Above-mentioned dore furnace comprises body of heater, and upper of furnace body is provided with raw material gas inlet, is disposed with heating I district, heating II district, heating III district, cooling zone and Ji Fencang in the stove from top to bottom.
The invention has the beneficial effects as follows: production method of the present invention has characteristics such as flow process is short, energy consumption is low, production cost is low, and the product applications of production is wide, has improved added value of product, and the cost performance of domestic high-performance magnetic core is greatly improved.With the carbonyl iron dust of explained hereafter of the present invention, make the magnetic core of Φ 26.9*14*11.1 (mm), can obtain under the 2.65MHz frequency, around Φ 0.6mm enamel-covered wire 30 circles, record Effective permeability μ e 10-15, Q value 300-350 with the WY-2851D HF Q meter.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of dore furnace of the present invention.
The specific embodiment
Fig. 1 is the structural representation of dore furnace, as shown in the figure, dore furnace comprises body of heater 1, body of heater 1 top is provided with raw material gas inlet 2,3,4 such as iron pentacarbonyl, carbonyl nickel, nitrogen, ammonia, is disposed with heating I district 5, heating II district 6, heating III district 7, cooling zone 8 and collection powder storehouse 9 in the stove from top to bottom.
Embodiment
With pure carbon monoxide and iron material in synthesis reactor, the synthetic iron pentacarbonyl that generates under the temperature of the pressure of 3～9.5MPa and 100～200 ℃, through condensation, gas-liquid separation, the liquid iron pentacarbonyl is sent storage tank to; The pentacarbonyl iron powder is heated to 100～135 ℃, make its vaporization, feed iron pentacarbonyl steam, carbonyl nickel steam, nitrogen, ammonia in dore furnace simultaneously, material flow is controlled to be iron pentacarbonyl 14-16L/H, carbonyl nickel 0.5-0.6L/H, nitrogen 30-40L/min, ammonia 1-3L/min.
Temperature in the segmentation control dore furnace, district temperature 180-240 ℃ of heating I, district 220-260 ℃ of heating II, district 240-280 ℃ of heating III, cooling zone 100-120 ℃ and storehouse 50-70 ℃ in powder of collection, it is compound even that raw material is generated in dore furnace, superfine iron carbonyl powder with special electromagnetic performance, and the carbonyl iron dust surface that generates carried out Passivation Treatment, specifically be that the compound carbonyl iron dust after decomposing is placed in the airtight collection powder storehouse, logical as argon gas or nitrogen oxygenous 0.1-0.2% are handled, make the surface generate one deck passivating film as thin as a wafer, obtain the carbonyl iron dust of average grain diameter 2.5-3.5 micron.
Claims (3)
1. the preparation method of a superfine carbonyl iron powder in use for high performance magnetic powder core, it is characterized in that this method be with pure carbon monoxide and iron material in synthesis reactor, the synthetic iron pentacarbonyl that generates under the temperature of the pressure of 3～15MPa and 100～200 ℃, through condensation, gas-liquid separation, the liquid iron pentacarbonyl is sent storage tank to; In dore furnace, feed iron pentacarbonyl, carbonyl nickel, nitrogen, ammonia simultaneously, temperature is between 160～350 ℃ in the control dore furnace, generate compound evenly, the superfine iron carbonyl powder with special electromagnetic performance, and in dore furnace, Passivation Treatment in the stove is carried out on the carbonyl iron dust surface that generates.
2. the preparation method of a kind of superfine carbonyl iron powder in use for high performance magnetic powder core according to claim 1, the flow that it is characterized in that described iron pentacarbonyl is 12-22L/h, carbonyl nickel 0.5-4L/h, nitrogen 30-80L/min, ammonia 1-6L/min.
3. the preparation method of a kind of superfine carbonyl iron powder in use for high performance magnetic powder core according to claim 1, it is characterized in that described dore furnace comprises body of heater, upper of furnace body is provided with raw material gas inlet, is disposed with heating I district, heating II district, heating III district, cooling zone and Ji Fencang in the stove from top to bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100292033A CN100522424C (en) | 2007-07-13 | 2007-07-13 | Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core |
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| CNB2007100292033A CN100522424C (en) | 2007-07-13 | 2007-07-13 | Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core |
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| CN101091990A CN101091990A (en) | 2007-12-26 |
| CN100522424C true CN100522424C (en) | 2009-08-05 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909392B (en) * | 2011-08-05 | 2016-02-17 | 陕西兴化化学股份有限公司 | Carbonyl iron dust atomization pyrolysis plant |
| CN103357866B (en) * | 2013-07-19 | 2015-12-23 | 江西悦安超细金属有限公司 | A kind of carbonyl iron dust high-temperature heat treatment method for metal magnetic powder core |
| CN105967242B (en) * | 2016-05-11 | 2018-02-06 | 江油核宝纳米材料有限公司 | The preparation method of nanometer carbonyl iron dust |
| CN105965033B (en) * | 2016-05-23 | 2018-02-06 | 江油核宝纳米材料有限公司 | The preparation method of micron order carbonyl iron, nickel alloy powder |
| CN113059183B (en) * | 2020-01-02 | 2023-05-19 | 吉林卓创新材料有限公司 | Preparation method of carbonyl iron powder special for iron powder core |
| CN113059182A (en) * | 2020-01-02 | 2021-07-02 | 吉林卓创新材料有限公司 | Preparation method of carbonyl iron powder special for magnetic grinding fluid |
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| US3955962A (en) * | 1974-04-13 | 1976-05-11 | Klockner-Werke Ag | Method of and apparatus for producing metal fibers in a magnetic field |
| CN85100669A (en) * | 1985-04-01 | 1986-07-16 | 冶金部钢铁研究总院 | The reparation technology of superfine iron carbonyl powder |
| CN2675302Y (en) * | 2003-12-30 | 2005-02-02 | 金川集团有限公司 | Decomposer for producing carbonyl metal powder |
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Assignee: Jiangxi Yuean Superfine Metal Co., Ltd. Assignor: Li Shangkui Contract fulfillment period: 2009.8.5 to 2024.8.5 Contract record no.: 2009360000061 Denomination of invention: Method for preparing superfine carbonyl iron powder in use for high performance magnetic powder core Granted publication date: 20090805 License type: Exclusive license Record date: 2009.9.29 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.8.5 TO 2024.8.5; CHANGE OF CONTRACT Name of requester: JIANGXI YUEAN ULTRA-FINE METAL CO., LTD. Effective date: 20090929 |
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Effective date of registration: 20180710 Address after: 341500 new century industrial city, Dayu County, Ganzhou, Jiangxi Patentee after: Jiangxi Yuean Superfine Metal Co., Ltd. Address before: 528429 Yuet long superfine Pioneer Metals Corporation, South Causeway Road, Daqin Industrial Zone, Huangpu town, Zhongshan, Guangdong Patentee before: Li Shangkui |
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Address after: 341000 Dayu new century industrial city, Dayu County, Jiangxi, Ganzhou Patentee after: Jiangxi Yue'an New Materials Co., Ltd. Address before: 341500 Dayu new century industrial city, Dayu County, Jiangxi, Ganzhou Patentee before: Jiangxi Yuean Superfine Metal Co., Ltd. |
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