CN102976736A - Preparation method of bonded ferrite magnetic powder - Google Patents
Preparation method of bonded ferrite magnetic powder Download PDFInfo
- Publication number
- CN102976736A CN102976736A CN2012105488296A CN201210548829A CN102976736A CN 102976736 A CN102976736 A CN 102976736A CN 2012105488296 A CN2012105488296 A CN 2012105488296A CN 201210548829 A CN201210548829 A CN 201210548829A CN 102976736 A CN102976736 A CN 102976736A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- preparation
- raw material
- powder
- adopts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention provides a preparation method of bonded ferrite magnetic powder, which comprises the following steps of: preparing the powder raw material according to a molecular formula MO.nFe2O3, wherein M represents at least one of strontium element and barium element, and n represents a molar ratio and is 5.0-6.40; weighing the powder raw material according to a predetermined proportion, and mixing to obtain a mixture; pelletizing the mixture, and then pre-sintering at 1,000-1,250 DEG C to obtain a pre-sintered material; and grinding the pre-sintered material by a Raymond mill to obtain the target magnetic powder. The method provided by the invention has the characteristics of few processes and low energy consumption; and the prepared magnetic powder contains a small amount of coarse particles. According to the invention, the particle size of the magnetic powder is adjusted while the pre-sintered material is ground according to the equipment characteristics of the Raymond mill, and the coarse particles of the magnetic powder are effectively reduced.
Description
Technical field
The present invention relates to a kind of preparation method of bonded ferrite magnetic powder, belong to the ferrite magnetic material technical field.
Background technology
Bonded ferrite is widely used in the fields such as household electrical appliances, toy, automobile, such as seal strip for refrigerator door, advertisement magnetic note, car damping plate etc.The molding mode of bonded ferrite mainly contains extrusion moulding, calendering formation, injection molding etc.Magnetic property and mechanical property are the most important evaluation indexes of bonded ferrite.For example for seal strip for refrigerator door, the suction of magnetic stripe is the comprehensive embodiment of magnetic property, and the suction of magnetic stripe depends primarily on the performance of magnetic; The mechanical characteristics such as the pliability of magnetic stripe, hardness depend on the characteristic of powder characteristics and the binding agent of magnetic simultaneously.In general, magnetic is thinner, and the pliability of magnetic stripe is good, and the monocrystalline ratio of magnetic is high, and then magnetic stripe suction is high.For the magnetic stripe magnetic, the big particle in the magnetic (surpassing 35 μ m) will become stress point, reduce the extensibility of magnetic stripe.For magnetic paster of advertisement, also should reduce as far as possible granularity of magnet powder equally, to obtain higher over-all properties.
But because the ferrite industry belongs to the high energy consumption industry, bonded ferrite magnetic powder is existing preparation technology generally need through operations such as pre-burning, drying and annealing, and the unit consumption of energy of product is larger.
Summary of the invention
The present invention is the higher problem of energy consumption that solves the unit product that exists in the existing bonded ferrite manufacturing technology, and then a kind of preparation method of bonded ferrite magnetic powder is provided.For this reason, the invention provides following technical scheme:
A kind of preparation method of bonded ferrite magnetic powder comprises:
According to molecular formula MOnFe
2O
3The preparation powder raw material, described M represents at least a in strontium element or the barium element, and described n represents mol ratio, n=5.0～6.40;
By the described powder raw material of predetermined proportion weighing, and by batch mixing acquisition compound;
After described compound pelletizing, under 1000-1250 ℃ of condition, carry out pre-burning, obtain Preburning material;
Adopt Raymond mill that described Preburning material is ground, obtain the target magnetic.
The method that the present invention adopts has the advantages that operation is few, energy consumption is low; Simultaneously prepared magnetic, coarse particles content is less.The present invention utilizes the equipment characteristic of Raymond mill, and the granularity to magnetic when Preburning material is ground is adjusted, and has effectively reduced the coarse particles of magnetic.
Embodiment
Below in conjunction with the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making all other embodiment that obtain under the creative work prerequisite.
The specific embodiment of the present invention provides a kind of preparation method of bonded ferrite magnetic powder, comprising:
According to molecular formula MOnFe
2O
3The preparation powder raw material, described M represents at least a in strontium element or the barium element, and described n represents mol ratio, n=5.0～6.40;
By the described powder raw material of predetermined proportion weighing, and by batch mixing acquisition compound;
After described compound pelletizing, under 1000-1250 ℃ of condition, carry out pre-burning, obtain Preburning material;
Adopt Raymond mill that described Preburning material is ground, obtain the target magnetic.
Preferably, in described powder raw material, adopt highly active iron oxide red, iron scale or fine ore as the ferro element raw material.Described mixing method can adopt dry method batch mixing or material by wet type mixing.The equipment of described Raymond mill can adopt the analytical engine of high speed rotating that described Preburning material is carried out classification, and fine powder is by analytical engine, and meal falls back and continues grinding in the mill chamber.Described Fe element adopts iron oxide red, iron scale or fine ore as powder raw material.When M represents strontium element, adopt Strontium carbonate powder as powder raw material, when M represents the barium element, adopt barium carbonate as powder raw material.
In order to reduce the unit consumption of energy of magnetic, the exploitation dry preparation process reduces the wet-milling operation, therefore need not to carry out drying treatment, can significantly reduce energy consumption.In order further to reduce energy consumption, take without annealing process, further reduce energy consumption.For this reason, the present invention utilizes the process characteristic of Raymond mill, when magnetic grinds, in time fine powder is taken away by wind-force, avoids magnetic too to grind.Adjust simultaneously the rotating speed of analytical engine, the fineness of magnetic is adjusted, effectively controlled the size-grade distribution of magnetic.
The preparation method of the bonded ferrite magnetic powder that the specific embodiment of the present invention provides mainly comprises: dry method batch mixing → densification → pre-burning → Raymond mill → classification → magnetic.Because the jHc of magnetic is excessively low, with causing the demagnetization of magnetic stripe serious, cause stability and the ageing decline of magnetic stripe.The purpose of magnetic annealing is to eliminate the lattice imperfection that the magnetic crushing process causes, and improves the jHc of magnetic.Take without annealing process, must guarantee that the jHc of magnetic meets service requirements.Therefore this technique must be in higher level by the strict jHc that controls the pre-burning pellet, and controls the fall of jHc at pulverizing process.This embodiment reduces calcined temperature and controls grain growth, thereby obtain the Preburning material of high jHc by adopting highly active raw material.At pulverizing process, it is broken to take Raymond mill to carry out fine powder, reduces crossing of magnetic and pulverizes, the fall of control jHc.Utilize simultaneously the principle features of Raymond mill, by adjusting the analytical engine rotating speed, control coarse grained size and content.
And the method that the ball mill that usually adopts grinds magnetic, although can effectively reduce the fineness of magnetic, magnetic grinds in ball mill for a long time, magnetic too grinds, produced a large amount of lattice imperfections, so magnetic jHc is low, causes final magnetic stripe demagnetization serious.Therefore adopt the magnetic of ball mill grinding, all need to carry out anneal, and the technical scheme that this embodiment provides need not to carry out anneal, therefore effectively reduce energy consumption.
Below by specific embodiment the technical scheme that the present invention proposes is elaborated.
Embodiment 1
Weighing 1280Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 150 rev/mins.The acquisition mean particle size is 1.9 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 2
Weighing 1250Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 150 rev/mins.The acquisition mean particle size is 2.0 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 3
Weighing 1280Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 50 rev/mins.The acquisition mean particle size is 2.7 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 4
Weighing 1280Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 100 rev/mins.The acquisition mean particle size is 2.3 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 5
Weighing 1280Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 200 rev/mins.The acquisition mean particle size is 1.73 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 6
Weighing 1280Kg iron oxide red, 280Kg barium carbonate, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1100 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 400 rev/mins.The acquisition mean particle size is 1.5 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
Embodiment 7
Weighing 1280Kg iron oxide red, 210Kg Strontium carbonate powder, the strong mixed machine of employing carry out batch mixing, adopt ball mill to carry out densification, obtain compound.
Compound adopts rotary kiln after pelletizing, carry out sintering under 1060 ℃, obtains Preburning material.Adopt Raymond mill that the pre-burning pellet is ground, adjusting the analytical engine rotating speed is 150 rev/mins.The acquisition mean particle size is 1.8 microns magnetic.
Weighing 20g magnetic, 2 gram paraffin after mixing, 110 ℃ of lower insulations 30 minutes, obtain mixture; Weighing 18 gram mixtures, compression moulding under 8000MPa pressure, the cylindrical magnetic patch of acquisition Ф 25.2mm.
Adopt the B-H tester to measure the magnetic hysteresis loop of right cylinder magnetic patch, obtain magnet performance.
Adopt WLP-202 model mean particle size tester that magnetic is averaged granularity Detection.
The embodiment performance
The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. the preparation method of a bonded ferrite magnetic powder is characterized in that, comprising:
According to molecular formula MOnFe
2O
3The preparation powder raw material, described M represents at least a in strontium element or the barium element, and described n represents mol ratio, n=5.0～6.40;
By the described powder raw material of predetermined proportion weighing, and by batch mixing acquisition compound;
After described compound pelletizing, under 1000-1250 ℃ of condition, carry out pre-burning, obtain Preburning material;
Adopt Raymond mill that described Preburning material is ground, obtain the target magnetic.
2. preparation method according to claim 1 is characterized in that, adopts highly active iron oxide red, iron scale or fine ore as the ferro element raw material in described powder raw material.
3. preparation method according to claim 1 is characterized in that, the equipment of described Raymond mill adopts the analytical engine of high speed rotating that described Preburning material is carried out classification, and fine powder is by analytical engine, and meal falls back and continues grinding in the mill chamber.
4. preparation method according to claim 1 is characterized in that, the equipment of described Raymond mill adopts the analytical engine of high speed rotating that described Preburning material is carried out classification, and fine powder is by analytical engine, and meal falls back and continues grinding in the mill chamber.
5. preparation method according to claim 1 is characterized in that, described Fe element adopts iron oxide red, iron scale or fine ore as powder raw material.
6. preparation method according to claim 1 is characterized in that, adopts Strontium carbonate powder as powder raw material when M represents strontium element, adopts barium carbonate as powder raw material when M represents the barium element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105488296A CN102976736A (en) | 2012-12-17 | 2012-12-17 | Preparation method of bonded ferrite magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105488296A CN102976736A (en) | 2012-12-17 | 2012-12-17 | Preparation method of bonded ferrite magnetic powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102976736A true CN102976736A (en) | 2013-03-20 |
Family
ID=47851145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105488296A Pending CN102976736A (en) | 2012-12-17 | 2012-12-17 | Preparation method of bonded ferrite magnetic powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102976736A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733149A (en) * | 2013-12-23 | 2015-06-24 | 昆山优磁电子有限公司 | Bendable magnetic core and manufacturing method thereof |
| CN105712714A (en) * | 2015-03-31 | 2016-06-29 | 浙江安特磁材有限公司 | Rubber-plastic ferrite magnetic powder and preparation method thereof |
| CN105836808A (en) * | 2016-03-17 | 2016-08-10 | 浙江安特磁材有限公司 | Bonded ferrite magnetic powder, bonding magnet and preparation method thereof |
| CN106167402A (en) * | 2016-05-13 | 2016-11-30 | 泰州茂翔电子器材有限公司 | A kind of high-performance manganese-zinc ferrite powder preparation method |
| CN112321292A (en) * | 2020-11-05 | 2021-02-05 | 北矿磁材（阜阳）有限公司 | Method for manufacturing sintered ferrite pre-sintering material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077306A (en) * | 1993-03-29 | 1993-10-13 | 北京矿冶研究总院磁性材料研究所 | The manufacture method of cohesive ferrites magnetic powder for shock absorbing and noise reducing |
| CN2905210Y (en) * | 2006-04-11 | 2007-05-30 | 谢观亮 | Raymond mill analyzer provided with coarse powder collector |
| CN101445363A (en) * | 2008-12-05 | 2009-06-03 | 北矿磁材科技股份有限公司 | Rubber ferromagnetic oxide powder and preparation method thereof |
| CN102557606A (en) * | 2012-03-16 | 2012-07-11 | 南京深宁磁电有限公司 | Preparation method for magnesium-zinc soft ferrite material and magnesium-zinc soft ferrite material |
| CN202356178U (en) * | 2011-10-21 | 2012-08-01 | 江苏大阳光辅股份有限公司 | Inclined blade structure of analyzer of Raymond mill |
-
2012
- 2012-12-17 CN CN2012105488296A patent/CN102976736A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077306A (en) * | 1993-03-29 | 1993-10-13 | 北京矿冶研究总院磁性材料研究所 | The manufacture method of cohesive ferrites magnetic powder for shock absorbing and noise reducing |
| CN2905210Y (en) * | 2006-04-11 | 2007-05-30 | 谢观亮 | Raymond mill analyzer provided with coarse powder collector |
| CN101445363A (en) * | 2008-12-05 | 2009-06-03 | 北矿磁材科技股份有限公司 | Rubber ferromagnetic oxide powder and preparation method thereof |
| CN202356178U (en) * | 2011-10-21 | 2012-08-01 | 江苏大阳光辅股份有限公司 | Inclined blade structure of analyzer of Raymond mill |
| CN102557606A (en) * | 2012-03-16 | 2012-07-11 | 南京深宁磁电有限公司 | Preparation method for magnesium-zinc soft ferrite material and magnesium-zinc soft ferrite material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733149A (en) * | 2013-12-23 | 2015-06-24 | 昆山优磁电子有限公司 | Bendable magnetic core and manufacturing method thereof |
| CN105712714A (en) * | 2015-03-31 | 2016-06-29 | 浙江安特磁材有限公司 | Rubber-plastic ferrite magnetic powder and preparation method thereof |
| CN105836808A (en) * | 2016-03-17 | 2016-08-10 | 浙江安特磁材有限公司 | Bonded ferrite magnetic powder, bonding magnet and preparation method thereof |
| CN105836808B (en) * | 2016-03-17 | 2018-05-11 | 浙江安特磁材有限公司 | A kind of bonded ferrite magnetic powder and bonded permanent magnet and preparation method thereof |
| CN106167402A (en) * | 2016-05-13 | 2016-11-30 | 泰州茂翔电子器材有限公司 | A kind of high-performance manganese-zinc ferrite powder preparation method |
| CN112321292A (en) * | 2020-11-05 | 2021-02-05 | 北矿磁材（阜阳）有限公司 | Method for manufacturing sintered ferrite pre-sintering material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104261811B (en) | A kind of high-performance permanent-magnet ferrite and manufacture method thereof | |
| EP1475352B1 (en) | Bond magnet and ferrite magnetic powder for bond magnet | |
| CN102050619B (en) | Method for preparing permanent magnet oxysome material | |
| CN102701721B (en) | Low-cost sintered calcium permanent magnetic ferrite and preparation method thereof | |
| CN102976736A (en) | Preparation method of bonded ferrite magnetic powder | |
| CN101552069A (en) | Magnetoplumbite permanent magnetic ferrite and method of producing the same | |
| CN103833343B (en) | A kind of nano rare earth permanent-magnet ferrite material | |
| EP3364426A1 (en) | Ferrite magnetic material and ferrite sintered magnet | |
| KR102588231B1 (en) | Ferrite magnetic material and ferrite sintered magnet | |
| CN101615470B (en) | High-performance permanent magnet ferrite arch magnet and sintering method thereof | |
| CN102329128B (en) | Hard calcium ferrite and manufacturing method thereof | |
| CN103030388A (en) | High-performance permanent magnetic ferrite material and preparation method thereof | |
| CN103803960A (en) | Preparation method of permanent magnetic ferrite material | |
| CN103548101A (en) | Magnetoplumbite-type ferrite magnetic material and segment-type permanent magnet derived therefrom | |
| CN102010194B (en) | Magneto-plumbite type permanent magnetic ferrite and manufacturing method thereof | |
| CN108101528B (en) | Method for improving residual magnetism of strontium ferrite pre-sintered material | |
| CN112908676A (en) | Permanent magnetic ferrite magnetic powder for dry pressing molding and preparation method thereof | |
| CN110156452A (en) | A kind of M-type strontium ferrite and preparation method thereof | |
| CN111056832A (en) | Ferrite permanent magnetic material and preparation method thereof | |
| CN106587974B (en) | Method for improving remanence of dry-pressing powder molding permanent magnetic ferrite | |
| CN109111219A (en) | A kind of preparation method of permanent-magnet ferrite material | |
| CN102093059B (en) | Permanent ferrite material additive and preparation method and application thereof | |
| CN112321294A (en) | Ferrite permanent magnetic material and preparation method thereof | |
| CN105967672A (en) | High-performance calcium strontium zinc barium ferrite and preparation method thereof | |
| CN109133896A (en) | A kind of permanent-magnet ferrite material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130320 |