CN110590228A - Method for producing low-loss and high-BS material by using MnZn ferrite magnetic core grinding machine mud - Google Patents
Method for producing low-loss and high-BS material by using MnZn ferrite magnetic core grinding machine mud Download PDFInfo
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- CN110590228A CN110590228A CN201910715552.3A CN201910715552A CN110590228A CN 110590228 A CN110590228 A CN 110590228A CN 201910715552 A CN201910715552 A CN 201910715552A CN 110590228 A CN110590228 A CN 110590228A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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Abstract
The invention discloses a method for producing a low-loss and high-BS material by utilizing MnZn ferrite core grinding machine mud, which comprises the following steps of: (1) grinding the mud of the grinding machine; (2) blanking and sanding; (3) sizing and stirring; (4) correcting the deviation of the formula; (5) and (4) spray granulation. The method solves the problem of treatment of the grinding machine mud, can be used for preparing qualified front-edge low-loss high-BS materials in a secondary utilization mode, realizes resource utilization of wastes, achieves multiple purposes, has the most obvious advantages of reducing material cost and being suitable for mass production and preparation.
Description
Technical Field
The invention relates to a method for producing a low-loss and high-BS material by using MnZn ferrite magnetic core grinding machine mud.
Background
The MnZn ferrite magnetic core is more and more widely applied and is an indispensable electronic material for various communication equipment, computers, household appliances, automobile electronics, power supply devices, instruments, spaceflight industry and the like.
With the increase of domestic MnZn ferrite core factories and the increase of yield, the quantity of grinding mud (grinding waste) generated every year cannot be estimated, and how to treat the grinding mud is firstly determined to be disposable so as to avoid pollution, so that how to reuse the grinding mud waste becomes an important research direction.
Disclosure of Invention
The invention aims to overcome the defects and provides a method for producing a low-loss and high-BS material by using MnZn ferrite magnetic core grinding machine mud, which not only solves the problem of treatment of the grinding machine mud, but also can be used for secondarily manufacturing the qualified low-loss and high-BS material.
The purpose of the invention is realized by the following technical scheme:
a method for producing a low-loss and high-BS material by using MnZn ferrite core grinding machine mud comprises the following steps:
(1) grinding the grinder mud, drying the ground grinder mud in the sun under a clean open condition, and grinding the ground grinder mud into fine particles by a grinder after the ground grinder mud is completely dried;
(2) feeding and sanding, namely adding water of a sanding machine, the grinding machine mud particles obtained in the step (1) and the steel balls into the sanding machine, starting the sanding machine, feeding the materials circularly during the rotation of the stirring rod, sanding for 50-70min after feeding, controlling the granularity of the slurry to be 0.75-1.2 mu m, and driving the slurry into a stirring tank after sanding;
(3) gluing and stirring, namely adding pre-boiled PVA glue into the stirring tank, uniformly mixing and stirring the slurry obtained in the step (2) and the PVA glue for 1h, and taking the slurry in the stirring tank to perform formula analysis through a fluorescence analyzer after stirring is completed;
(4) correcting the formula, namely correcting the formula according to the formula analysis result in the step (3), wherein the main formula of the deviation is Fe2O3、Mn3O4ZnO, the partial additive is CaCO3、Nb2O5、V2O5、ZrO2、SnO2Adding the partial formula into a stirring tank, and continuously stirring for 1 h;
(5) and (4) spray granulation, namely, feeding the slurry obtained in the step (4) into a spray tower for spray granulation, and then screening by a vibrating screen to obtain the product.
Further, in the step (1), the grinding machine mud cannot be mixed with other impurities except water.
Further, in the step (2), 240kg of sand mill water, 400kg of particles and 2200kg of steel balls are added during each batch of sand milling, 11 batches are carried out, and 4400kg of powder is mixed and enters a stirring tank.
Further, in the step (3), the preparation method of the PVA glue comprises the following steps: 48kg of PVA solid and 360kg of water are boiled, the glue boiling time is 3 hours, and the glue boiling temperature is 90 ℃.
Further, in the step (4), the main formula is made of Fe2O3、Mn3O4ZnO is composed of 53.29:36.96:9.75 mol percent, and the additive is CaCO in the formula3:200ppm、Nb2O5：300ppm、V2O5:300ppm、ZrO2:200ppm、SnO2Determining at 300 ppm;
if the total amount of the partial formula raw materials is below 50kg, directly adding the partial formula raw materials into a stirring pool; if the total amount of the raw materials of the partial formula is more than 50kg, mixing the partial formula with coarse and fine particles (parts except normal powder, namely particles with the particle size of more than 60 meshes and less than 220 meshes) obtained by screening by a spray tower in the step (5) to form 400kg of mixed material, sanding for 30min, and adding into a stirring pool.
Further, in the step (5), the inlet temperature of the spray tower is 320-.
The invention has the following beneficial effects:
the method for producing the low-loss and high-BS material by using the MnZn ferrite magnetic core grinding machine mud solves the problem of treatment of the grinding machine mud, can be used for preparing the qualified leading-edge low-loss and high-BS material by secondary utilization, realizes resource utilization of waste, achieves multiple purposes, and has the most obvious advantages of reducing material cost and being suitable for mass production and preparation.
Drawings
Fig. 1 is a temperature (° c) -permeability (ui) graph of a material obtained by the method of example 1 of the present invention, corresponding to ui curves at different temperatures.
Fig. 2 is a graph of frequency (KHz) -permeability (ui) of a material obtained by the method of example 1 of the present invention, and initial permeability and complex permeability at different frequency values.
FIG. 3 is a graph showing temperature (. degree. C.) loss (mW/cm) of a material obtained by the method of example 1 of the present invention3) Graph, loss curve at different temperatures.
FIG. 4 is a plot of magnetic field strength versus BS for a material obtained by the method of example 1 of the present invention, the BS curves at 25 deg.C, 60 deg.C and 100 deg.C for different magnetic field strengths.
FIG. 5 is a graph of magnetic flux density-loss-frequency curves of the material obtained by the method of example 1 of the present invention, the curves having a distribution of 25mT, 100mT, and 200 mT.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
A method for producing a low-loss and high-BS material by using MnZn ferrite core grinding machine mud comprises the following steps:
(1) grinding the grinder mud, drying the dug grinder mud in the sun under clean open conditions, and grinding the grinder mud into fine particles by a grinder after the grinder mud is completely dried, wherein the grinder mud cannot be mixed with other impurities except water.
(2) And (2) blanking and sanding, namely adding 240kg of water of the sand mill, 400kg of grinding machine mud particles obtained in the step (1) and 2200kg of steel balls into the sand mill, starting the sand mill, feeding the materials circularly during the rotation of the stirring rod, sanding for 50-70min after blanking, controlling the granularity of the slurry to be 0.75-1.2 mu m, and pumping the slurry into a stirring tank after sanding. A total of 11 batches were carried out, giving 4400kg of powder to the stirred tank.
(3) And (3) gluing and stirring, namely adding the pre-boiled PVA glue into the stirring tank, and uniformly mixing and stirring the slurry obtained in the step (2) and the PVA glue for 1 h. The preparation method of the PVA glue comprises the following steps: 48kg of PVA solid and 360kg of water are boiled, and the gel boiling time is 3 hours. And after stirring, taking the slurry in the stirring tank, and carrying out formula analysis by using a fluorescence analyzer.
(4) Correcting the formula, namely correcting the formula according to the formula analysis result in the step (3) to obtain a main formula with a deviationFrom Fe2O3、Mn3O4ZnO is composed of 53.29:36.96:9.75 mol percent, and the additive of the partial formula is CaCO3:200ppm、Nb2O5：300ppm、V2O5:300ppm、ZrO2:200ppm、SnO2300ppm, adding the partial components into a stirring pool, and continuously stirring for 1 h.
If the total amount of the partial formula raw materials is below 50kg, directly adding the partial formula raw materials into a stirring pool; if the total amount of the raw materials of the partial formula is more than 50kg, mixing the partial formula with particles which are obtained by screening in the spray tower in the step (5) and have a particle size of more than 60 meshes and less than 220 meshes to form 400kg of mixed material, sanding for 30min, and adding into a stirring pool.
(5) And (3) spray granulation, namely, feeding the slurry obtained in the step (4) into a spray tower for spray granulation, wherein the inlet temperature of the spray tower is 320-360 ℃, the outlet temperature is 90-110 ℃, a 60-mesh sample separation sieve is used for inspecting the spray tower, the water content is 0.15-0.25% based on the fact that the coarse powder at the tower opening is less than 9%, the coarse powder at the tower opening passes through a 60-220-mesh vibrating sieve, the powder between 60 meshes and 220 meshes is taken as normal powder, the powder particles between 60 meshes and 200 meshes are more than or equal to 85% (detected by the sample separation sieve), and the loose packing ratio is 1.35-1.50, thus obtaining the material.
The material is used for pressing T25 × 15 × 7.5 standard sample rings as an electrical property detection basis, sintering is carried out in a full-automatic nitrogen protection pushed slab kiln, the sintering temperature of the nitrogen kiln is preferably reduced to 1300 ℃, and the heat preservation time of a high-temperature region is about 3 hours. Test using the japanese kawasaki 8218-BH tester: initial permeability ui2300 ± 25%; the saturation magnetic flux density BS (25 ℃) reaches 510, and the BS (100 ℃) reaches 400; power loss Pcv (kw/m)3)600 at (100KHz200mT, 25 ℃), 410 at (100KHz200mT, 100 ℃); the Curie temperature Tc is greater than 230 ℃.
The density of the finished magnetic ring is 4.75.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for producing a low-loss and high-BS material by using MnZn ferrite core grinding machine mud is characterized by comprising the following steps of:
(1) grinding the grinder mud, drying the ground grinder mud in the sun under a clean open condition, and grinding the ground grinder mud into fine particles by a grinder after the ground grinder mud is completely dried;
(2) feeding and sanding, namely adding water of a sanding machine, the grinding machine mud particles obtained in the step (1) and the steel balls into the sanding machine, starting the sanding machine, feeding the materials circularly during the rotation of the stirring rod, sanding for 50-70min after feeding, controlling the granularity of the slurry to be 0.75-1.2 mu m, and driving the slurry into a stirring tank after sanding;
(3) gluing and stirring, namely adding pre-boiled PVA glue into the stirring tank, uniformly mixing and stirring the slurry obtained in the step (2) and the PVA glue for 1h, and taking the slurry in the stirring tank to perform formula analysis through a fluorescence analyzer after stirring is completed;
(4) correcting the formula, namely correcting the formula according to the formula analysis result in the step (3), wherein the main formula of the deviation is Fe2O3、Mn3O4ZnO, the partial additive is CaCO3、Nb2O5、V2O5、ZrO2、SnO2Adding the partial formula into a stirring tank, and continuously stirring for 1 h;
(5) and (4) spray granulation, namely, feeding the slurry obtained in the step (4) into a spray tower for spray granulation, and then screening by a vibrating screen to obtain the product.
2. The method for producing a low-loss, high BS material using MnZn ferrite core grinding mud according to claim 1, wherein in step (1), the grinding mud cannot be mixed with other impurities except water.
3. The method for producing a low-loss and high-BS material by using MnZn ferrite core grinding machine mud according to claim 1, wherein in the step (2), 240kg of sand mill water, 400kg of particles and 2200kg of steel balls are put into each batch during grinding, and 11 batches are carried out, and 4400kg of powder is put into a stirring tank.
4. The method for producing the low-loss and high-BS material by using the MnZn ferrite core grinding machine mud according to the claim 1, wherein in the step (3), the preparation method of the PVA glue is as follows: 48kg of PVA solid and 360kg of water are boiled, the glue boiling time is 3 hours, and the glue boiling temperature is 90 ℃.
5. The method for producing a low loss, high BS material using MnZn ferrite core grinding machine mud according to claim 1, wherein in step (4), the main formula is Fe2O3、Mn3O4ZnO is composed of 53.29:36.96:9.75 mol percent, and the additive is CaCO in the formula3:200ppm、Nb2O5：300ppm、V2O5:300ppm、ZrO2:200ppm、SnO2Determining at 300 ppm;
if the total amount of the partial formula raw materials is below 50kg, directly adding the partial formula raw materials into a stirring pool; if the total amount of the materials of the formula is more than 50kg, mixing the formula with the coarse and fine particles obtained by screening by the spray tower in the step (5) to form 400kg of mixed material, sanding for 30min, and adding into a stirring pool.
6. The method for producing low-loss and high-BS material by using MnZn ferrite core grinding machine mud according to claim 1, wherein in the step (5), the inlet temperature of the spray tower is 320-.
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Cited By (2)
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| CN113979755A (en) * | 2021-11-04 | 2022-01-28 | 无锡斯贝尔磁性材料有限公司 | Process control method for improving powder apparent density ratio of MnZn ferrite powder |
| CN115716747A (en) * | 2022-11-23 | 2023-02-28 | 上海华源磁业股份有限公司 | Method for producing low-loss material by using MnZn ferrite magnetic core grinding machine mud |
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Application publication date: 20191220 |