CN114133234A - Novel process for producing pressure-resistant ferrite powder - Google Patents
Novel process for producing pressure-resistant ferrite powder Download PDFInfo
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Abstract
The invention discloses a novel process for producing pressure-resistant ferrite powder, which comprises the following steps: weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine at 1000-2000r/min, controlling the grinding time at 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, and controlling the water content of the dehydrated powder at 5-10 wt%. The production process designed by the invention can be used for preparing the pressure-resistant ferrite material powder, and during production, the energy-saving effect is realized by reducing the air flow rate in the rotary kiln and reducing the heat consumption, and the pressure-resistant ferrite material powder produced by the process has the advantages of much higher resistivity than metal and alloy magnetic materials and higher dielectric property.
Description
Technical Field
The invention relates to the technical field of ferrite powder, in particular to a novel process for producing pressure-resistant ferrite powder.
Background
The ferrite is a metal oxide with ferromagnetism, which can be generally divided into three types of permanent magnetic ferrite, soft magnetic ferrite and gyromagnetic ferrite, and in terms of electrical characteristics, the resistivity of the ferrite is much larger than that of metal and alloy magnetic materials, and the ferrite also has higher dielectric property, and the magnetic property of the ferrite also shows higher magnetic conductivity at high frequency, so that the ferrite becomes a nonmetal magnetic material with wide application in the field of high frequency and weak current, and the ferrite powder is prepared into a powder shape with specified requirements from a ferrite raw material.
Disclosure of Invention
The invention aims to provide a novel process for producing pressure-resistant ferrite powder, which has the advantage of pressure resistance and solves the problems that the traditional ferrite powder has poor pressure resistance and cannot meet the use requirements of people.
In order to achieve the purpose, the invention provides the following technical scheme: a novel process for producing pressure-resistant ferrite powder comprises the following steps:
preparing raw materials:
weighing the raw materials according to the following mixture ratio:
40-80wt% of iron oxide
15-30wt% of manganese oxide
10-20wt% of zinc oxide
1-5wt% of auxiliary materials;
(II) dispersing:
pouring the raw materials prepared in the steps into a dispersion machine, and then adding deionized water to mix uniformly;
(III) grinding:
pouring the slurry obtained in the step into a spherical grinding machine for grinding, wherein the rotating speed of the grinding machine is controlled to be 1000-2000r/min, and the grinding time is controlled to be 0.5-3 h;
and (IV) pressure filtration:
pouring the ground slurry into a filter press for filter pressing dehydration, wherein the water content of the dehydrated powder is controlled to be 5-10 wt%;
(V) drying:
feeding the dry powder obtained in the step into a dryer for drying, and finally controlling the water content of the powder to be 1-3 wt%;
(VI) granulating:
feeding the dry powder obtained in the step into a disc granulator for granulation, wherein the diameter of the granules is controlled to be 3-5um during granulation;
(seventh) sintering:
putting the particles obtained in the step into a rotary kiln for presintering, wherein the presintering temperature is controlled at 600-1200 ℃, the presintering time is about 0.5-1.2h, the presintering flow is controlled at 2-6Kg/m, and the rotary kiln rotation speed is 10-50 r/min;
(eighth) preparing a finished product:
and coarsely crushing the particles subjected to the presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, adding the material powder and auxiliary materials in proportion by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Preferably, the iron oxide in the first step is ferric oxide, the manganese oxide is manganic oxide, and the auxiliary material comprises a dispersing agent, a defoaming agent and an additive, wherein the additive is one or a mixture of more than two of CaCO3, Nb2O5 and SiO 2.
Preferably, during the dispersion in the second step, the rotation speed of the dispersion machine is controlled at 1200-2000r/min, and the dispersion time is controlled at 1-2 h.
Preferably, the diameter of the steel ball in the ball mill in the third step is controlled to be 1-3 mm.
Preferably, the pressure of the filter press in the fourth step is controlled to be 1-3 MPa during pressure filtration.
Preferably, in the step five, during drying, the temperature in the dryer is controlled to be 100 ℃ to 150 ℃, and the drying time is controlled to be 3 to 5 hours.
Preferably, the rotation speed of the disc granulator in the sixth step is controlled at 500-800r/min during granulation.
Preferably, the seventh step needs to be insulated for 5-8h during sintering, and the insulation temperature is controlled at 300-.
Preferably, in the step eight, the tail gas discharged from the spray granulation is used for preheating and drying the raw material.
Compared with the prior art, the invention has the following beneficial effects:
the production process designed by the invention can be used for preparing the pressure-resistant ferrite material powder, and during production, the energy-saving effect is realized by reducing the air flow rate in the rotary kiln and reducing the heat consumption, and the pressure-resistant ferrite material powder produced by the process has the advantages of much higher resistivity than metal and alloy magnetic materials and higher dielectric property.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
a novel process for producing pressure-resistant ferrite powder comprises the following steps:
preparing raw materials:
weighing the raw materials according to the following mixture ratio:
40-80wt% of iron oxide
15-30wt% of manganese oxide
10-20wt% of zinc oxide
1-5wt% of auxiliary materials;
(II) dispersing:
pouring the raw materials prepared in the steps into a dispersion machine, and then adding deionized water to mix uniformly;
(III) grinding:
pouring the slurry obtained in the step into a spherical grinding machine for grinding, wherein the rotating speed of the grinding machine is controlled to be 1000-2000r/min, and the grinding time is controlled to be 0.5-3 h;
and (IV) pressure filtration:
pouring the ground slurry into a filter press for filter pressing dehydration, wherein the water content of the dehydrated powder is controlled to be 5-10 wt%;
(V) drying:
feeding the dry powder obtained in the step into a dryer for drying, and finally controlling the water content of the powder to be 1-3 wt%;
(VI) granulating:
feeding the dry powder obtained in the step into a disc granulator for granulation, wherein the diameter of the granules is controlled to be 3-5um during granulation;
(seventh) sintering:
putting the particles obtained in the step into a rotary kiln for presintering, wherein the presintering temperature is controlled at 600-1200 ℃, the presintering time is about 0.5-1.2h, the presintering flow is controlled at 2-6Kg/m, and the rotary kiln rotation speed is 10-50 r/min;
(eighth) preparing a finished product:
and coarsely crushing the particles subjected to the presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, adding the material powder and auxiliary materials in proportion by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
The first embodiment is as follows:
weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example two:
in the first embodiment, the following steps are added:
in the first step, ferric oxide is selected from ferric oxide, manganese oxide is selected from manganic oxide, and auxiliary materials comprise a dispersing agent, a defoaming agent and an additive, wherein the additive is one or a mixture of more than two of CaCO3, Nb2O5 and SiO 2.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example three:
in the second embodiment, the following steps are added:
in the second step, the rotation speed of the dispersion machine is controlled at 1200-2000r/min, and the dispersion time is controlled at 1-2 h.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example four:
in the third embodiment, the following steps are added:
the diameter of the steel ball in the ball grinder in the third step is controlled to be 1-3 mm.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example five:
in the fourth example, the following steps were added:
in the fourth step, the pressure of the filter press is controlled to be 1-3 MPa during filter pressing.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example six:
in the fifth example, the following steps were added:
and fifthly, controlling the temperature in the dryer to be 100-150 ℃ and controlling the drying time to be 3-5h during drying.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example seven:
in example six, the following steps were added:
step six, the rotating speed of the disc granulator is controlled at 500-800r/min during granulation.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example eight:
in example seven, the following steps were added:
step seven, heat preservation is needed for 5-8h during sintering, and the heat preservation temperature is controlled at 300-500 ℃.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Example nine:
in example eight, the following steps were added:
and step eight, preheating and drying the raw materials when tail gas discharged from spray granulation is used for drying the raw materials.
Weighing the raw materials according to the following mixture ratio: 40-80wt% of ferric oxide, 15-30wt% of manganese oxide, 10-20wt% of zinc oxide and 1-5wt% of auxiliary materials, pouring the raw materials prepared in the steps into a dispersion machine, adding deionized water, uniformly mixing, pouring the slurry obtained in the steps into a spherical grinding machine for grinding, controlling the rotating speed of the grinding machine to be 1000-2000r/min and the grinding time to be 0.5-3h, pouring the ground slurry into a filter press for filter pressing and dehydration, controlling the water content of the dehydrated powder to be 5-10wt%, sending the dry powder obtained in the steps into a drying machine for drying, finally controlling the water content of the powder to be 1-3wt%, sending the dry powder obtained in the steps into a disk for granulation, controlling the diameter of the particles to be 3-5 mu m during granulation, and putting the particles obtained in the steps into a rotary kiln for presintering, controlling the presintering temperature at 600-1200 ℃, controlling the presintering time to be 0.5-1.2h, controlling the presintering flow to be 2-6Kg/m, controlling the rotary kiln rotation speed to be 10-50r/min, coarsely crushing the particles subjected to presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, then proportionally adding the material powder and auxiliary materials by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A novel process for producing pressure-resistant ferrite powder is characterized by comprising the following steps: the method comprises the following steps:
preparing raw materials:
weighing the raw materials according to the following mixture ratio:
40-80wt% of iron oxide
15-30wt% of manganese oxide
10-20wt% of zinc oxide
1-5wt% of auxiliary materials;
(II) dispersing:
pouring the raw materials prepared in the steps into a dispersion machine, and then adding deionized water to mix uniformly;
(III) grinding:
pouring the slurry obtained in the step into a spherical grinding machine for grinding, wherein the rotating speed of the grinding machine is controlled to be 1000-2000r/min, and the grinding time is controlled to be 0.5-3 h;
and (IV) pressure filtration:
pouring the ground slurry into a filter press for filter pressing dehydration, wherein the water content of the dehydrated powder is controlled to be 5-10 wt%;
(V) drying:
feeding the dry powder obtained in the step into a dryer for drying, and finally controlling the water content of the powder to be 1-3 wt%;
and (3) granulation:
feeding the dry powder obtained in the step into a disc granulator for granulation, wherein the diameter of the granules is controlled to be 3-5um during granulation;
and (3) sintering:
putting the particles obtained in the step into a rotary kiln for presintering, wherein the presintering temperature is controlled at 600-1200 ℃, the presintering time is about 0.5-1.2h, the presintering flow is controlled at 2-6Kg/m, and the rotary kiln rotation speed is 10-50 r/min;
preparing a finished product:
and coarsely crushing the particles subjected to the presintering in the steps to the particle size of 1-2 mu m, finely crushing the coarsely crushed material powder, adding the material powder and auxiliary materials in proportion by using pure water as a solvent, sanding for 40-150 minutes until the particle size of the material powder is 0.5-1.2, and then spraying and granulating the finely crushed slurry at the temperature of 100-120 ℃ to obtain the pressure-resistant ferrite material powder.
2. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: in the first step, ferric oxide is selected from ferric oxide, manganese oxide is selected from manganic oxide, and auxiliary materials comprise a dispersing agent, a defoaming agent and an additive, wherein the additive is one or a mixture of more than two of CaCO3, Nb2O5 and SiO 2.
3. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: and in the second step, during dispersion, the rotating speed of the dispersion machine is controlled at 1200-2000r/min, and the dispersion time is controlled at 1-2 h.
4. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: the diameter of the steel ball in the ball grinder in the third step is controlled to be 1-3 mm.
5. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: and in the fourth step, the pressure of the filter press is controlled to be 1-3 MPa during filter pressing.
6. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: and fifthly, during drying, the temperature in the dryer is controlled to be 100-150 ℃, and the drying time is controlled to be 3-5 h.
7. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: in the sixth step, the rotating speed of the disc granulator is controlled at 500-800r/min during granulation.
8. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: and seventhly, heat preservation is needed for 5-8 hours during sintering, and the heat preservation temperature is controlled at 300-500 ℃.
9. The novel process for producing the pressure-resistant ferrite material powder according to claim 1, wherein the process comprises the following steps: and in the step eight, preheating and drying are carried out when tail gas discharged from spray granulation is used for drying the raw materials.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102531559A (en) * | 2010-12-22 | 2012-07-04 | 上海宝钢磁业有限公司 | Preparation method for high-performance manganese zinc ferrite powder |
| CN103664156A (en) * | 2013-11-15 | 2014-03-26 | 上海宝钢磁业有限公司 | Preparation method of manganese zinc ferrite powder |
| CN109574647A (en) * | 2018-12-06 | 2019-04-05 | 安徽精磁电子有限公司 | A kind of high intensity magnetic core and preparation method thereof |
| JP2021066648A (en) * | 2019-10-18 | 2021-04-30 | パウダーテック株式会社 | Ferrite powder and method for producing the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531559A (en) * | 2010-12-22 | 2012-07-04 | 上海宝钢磁业有限公司 | Preparation method for high-performance manganese zinc ferrite powder |
| CN103664156A (en) * | 2013-11-15 | 2014-03-26 | 上海宝钢磁业有限公司 | Preparation method of manganese zinc ferrite powder |
| CN109574647A (en) * | 2018-12-06 | 2019-04-05 | 安徽精磁电子有限公司 | A kind of high intensity magnetic core and preparation method thereof |
| JP2021066648A (en) * | 2019-10-18 | 2021-04-30 | パウダーテック株式会社 | Ferrite powder and method for producing the same |
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