CN102564094A - Secondary drying method for manganese-zinc ferrite powder - Google Patents
Secondary drying method for manganese-zinc ferrite powder Download PDFInfo
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- CN102564094A CN102564094A CN2010106005176A CN201010600517A CN102564094A CN 102564094 A CN102564094 A CN 102564094A CN 2010106005176 A CN2010106005176 A CN 2010106005176A CN 201010600517 A CN201010600517 A CN 201010600517A CN 102564094 A CN102564094 A CN 102564094A
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Abstract
The invention relates to a method for preparing manganese-zinc ferrite powder, and discloses a drying method for manganese-zinc ferrite powder. The drying method is characterized in that powder enters a dryer after being in spray granulation, is in heating drying at first, and then is in cooling drying. In the scheme, the powder after being in spray granulation is dried and cooled, consistency of moisture content of the powder can be better, moisture content of common powder which is in spray drying only can be controlled within a range of +/-0.1%, and can be controlled within a range of +/-0.03% after the powder is further in heating drying, but the manganese-zinc ferrite powder in the drying method is cooled after being in heating drying. The temperature of dried powder is high, high heat can lead the powder to absorb moisture if environment humidity is high, moisture of the powder can be evaporated if the environment humidity is low, problems of absorption and evaporation of moisture can be reduced to the greatest extent after the powder is cooled to room temperature, and stability of the moisture of the powder is kept before the powder is packaged.
Description
Technical field
The present invention relates to a kind of manufacturing approach of manganese-zinc ferrite material powder, relate in particular to the drying means after the manufacturing of manganese-zinc ferrite material powder is accomplished.
Background technology
Conventional softer magnetic ferrites made technology mainly is divided into dry method and wet processing, and dry process generally is once to do mix → to make ball → pre-burning → sand milling → mist projection granulating.
Wet processing generally is that the raw material wet method is disperseed → sand milling → one time mist projection granulating → pre-burning → coarse crushing → secondary sand milling → mist projection granulating.
Two kinds of technologies have all adopted mist projection granulating at last, its main purpose be for obtain to have the certain granules distribution, moisture content, loose specific weight and mobile particle.Carried out drying during mist projection granulating, dried grain diameter is at 80～150um, and product design is spherical in shape, and the free mobility of particle is good, and apparent density is even, and very thin particle is few, helps when moulding, obtaining the uniform product of density.But, too low like the moisture content of fruit granule, will produce cracking during moulding, moisture content too high again can be when moulding sticking to mould, therefore generally requiring the moisture content scope is 0.25% ± 0.03%.But because the problem of spray tower equipment, the moisture content of particle generally can only be controlled in 0.25% ± 0.1% the scope.In addition, the particle temperature behind the mist projection granulating is higher, if under the very big situation of ambient humidity, particle can absorbing environmental moisture, makes moisture content produce fluctuation, thereby influence follow-up moulding.
Summary of the invention
Technical problem to be solved by this invention provides a kind of drying means of manganese-zinc ferrite material powder, solve behind present mist projection granulating and the mist projection granulating to the particle moisture content uncontrollable in the scope of needs with the unsettled defective of moisture content.
Technical scheme
A kind of drying means of manganese-zinc ferrite material powder is characterized in that: the material powder gets into drying machine after accomplish making through mist projection granulating again, carries out heat drying earlier, after carry out cool drying.
Said mist projection granulating control particle moisture content is 0.5% ± 0.1%, and heat drying control particle moisture content is 0.25% ± 0.03%.
Said material powder is behind mist projection granulating; Particle directly gets into vibrating dryer; Two parts before and after said vibrating dryer is divided into are provided with thermal current inlet port and thermal current outlet in the vibrating dryer forward part, have filter cloth to prevent the dust discharge on the said thermal current outlet; Be provided with cooling blast inlet port and cooling blast outlet in the vibrating dryer rear section, also be provided with filter cloth on the said cooling blast outlet.
Said vibrating dryer forward part adopts the air-flow that blower fan is produced to produce thermal current through over-heat-exchanger, input thermal current inlet port.
Said vibrating dryer rear section adopts the air-flow of blower fan generation directly as cooling blast.
The entering vibratory sieve sieved and obtains the material powder of reasonable distribution of particles after said particle behind cool drying was discharged.
Beneficial effect
The material powder of scheme of the present invention after with mist projection granulating carries out drying and cooling again, can make the moisture content uniformity of material powder better, and the material powder moisture content that general spray-drying is come out can only be controlled at ± and 0.1%; Optimally also can only be controlled at ± 0.05%; And through further heat drying can be controlled at ± 0.03%, and after heat drying to the material powder cool off because dried material powder temperature is higher; If ambient humidity is higher, high temperature can make the material powder moisture absorption; Otherwise the material powder can transpiring moisture, and above-mentioned phenomenon can drop to minimumly behind the cool to room temperature, has kept the moisture stabilization property of material powder before packing.
Description of drawings
Fig. 1 is the present invention program's sketch map.
Wherein: 1-vibrating dryer, 2-blower fan, 3-heat exchanger, 11-drying machine first half, 12-drying machine latter half.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing, further set forth the present invention.
Particle moisture content during manganese-zinc ferrite material powder process mist projection granulating is controlled at 0.5% ± 0.1%; Shown in accompanying drawing 1; Particle behind the mist projection granulating directly gets into vibrating dryer 1, and the air-flow that blower fan 2 produces produces thermal current through heat exchanger 3 and gets into drying machine first half 11, and discharges at bobbing machine first half 11; Outlet has filter cloth to prevent the dust discharge; Particle moisture content after dry is controlled at 0.25% ± 0.03%, gets into drying machine latter half 12 then, and the air-flow that blower fan 2 produces directly gets into particle is cooled off; Waste gas is discharged by the exhaust outlet that latter half has filter cloth, and sieving through cooled particle discharge bobbing machine entering vibratory sieve obtains the material powder of reasonable distribution of particles.
Said method is through experiment, and it is following to obtain two groups of data:
First group; The moisture content of the material behind the mist projection granulating is between 0.46%～0.58%, and temperature is 52 ℃, 26 ℃ of environment temperatures; Envionmental humidity is 68%; Through the dry cooled moisture content of vibrating dryer is 0.24%～0.27%, and temperature is 28 ℃, and the repetition measurement moisture content is 0.24%～0.27% after one hour.
Second group; The moisture content of the material behind the mist projection granulating is between 0.41%～0.58%, and temperature is 48 ℃, 23 ℃ of environment temperatures; Envionmental humidity is 76%; Through the dry cooled moisture content of vibrating dryer is 0.23%～0.28%, and temperature is 27 ℃, and the repetition measurement moisture content is 0.23%～0.28% after one hour.
Adopt method of the present invention all to obtain satisfied result.Method of the present invention is suitable for various technologies, the particle behind the mist projection granulating is carried out the further adjustment of moisture content after following mist projection granulating, and the performance that improves material powder and subsequent product is all played effective function.
Claims (6)
1. the drying means of a manganese-zinc ferrite material powder is characterized in that: the material powder through mist projection granulating accomplish make after, get into drying machine again, carry out heat drying earlier, after carry out cool drying.
2. the drying means of manganese-zinc ferrite material powder as claimed in claim 1 is characterized in that: said mist projection granulating control particle moisture content is 0.5% ± 0.1%, and heat drying control particle moisture content is 0.25% ± 0.03%.
3. according to claim 1 or claim 2 the drying means of manganese-zinc ferrite material powder; It is characterized in that: said material powder is behind mist projection granulating; Particle directly gets into vibrating dryer; Two parts before and after said vibrating dryer is divided into are provided with thermal current inlet port and thermal current outlet in the vibrating dryer forward part, have filter cloth to prevent the dust discharge on the said thermal current outlet; Be provided with cooling blast inlet port and cooling blast outlet in the vibrating dryer rear section, also be provided with filter cloth on the said cooling blast outlet.
4. the drying means of manganese-zinc ferrite material powder as claimed in claim 3 is characterized in that: said vibrating dryer forward part adopts the air-flow that blower fan is produced to produce thermal current through over-heat-exchanger, input thermal current inlet port.
5. the drying means of manganese-zinc ferrite material powder as claimed in claim 3 is characterized in that: said vibrating dryer rear section adopts the air-flow of blower fan generation directly as cooling blast.
6. the drying means of manganese-zinc ferrite material powder as claimed in claim 1 is characterized in that: the entering vibratory sieve sieved and obtains the material powder of reasonable distribution of particles after said particle behind cool drying was discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106005176A CN102564094A (en) | 2010-12-22 | 2010-12-22 | Secondary drying method for manganese-zinc ferrite powder |
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| CN2010106005176A CN102564094A (en) | 2010-12-22 | 2010-12-22 | Secondary drying method for manganese-zinc ferrite powder |
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| CN102564094A true CN102564094A (en) | 2012-07-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332695A (en) * | 2013-06-13 | 2013-10-02 | 福建远翔化工有限公司 | Secondary drying method for white carbon black |
| CN103768995A (en) * | 2014-01-28 | 2014-05-07 | 西安建筑科技大学 | Granulation method for ultrafine and nano soft magnetic ferrite powder |
| CN103836904A (en) * | 2014-03-17 | 2014-06-04 | 无锡市海昌机械设备有限公司 | Feeding system used for vacuum belt type powder continuous drying machine |
| CN112648835A (en) * | 2020-09-16 | 2021-04-13 | 武汉青铜科技信息咨询有限公司 | High-efficient drying-machine of circulation for copper concentrate |
| CN113012924A (en) * | 2019-12-20 | 2021-06-22 | 合肥博微田村电气有限公司 | Preparation method of corrosion-resistant integrally-formed inductance powder |
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| CN1619241A (en) * | 2004-12-08 | 2005-05-25 | 河南安彩高科股份有限公司 | Quartz sand raw material fluidized bed drying method for glass |
| CN1697094A (en) * | 2005-05-30 | 2005-11-16 | 苏州冠达磁业有限公司 | Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material |
| CN1927699A (en) * | 2006-09-20 | 2007-03-14 | 山东天力干燥设备有限公司 | Sodium percarbonate dry method granulation processes and apparatus thereof |
| CN201297822Y (en) * | 2008-08-11 | 2009-08-26 | 常州先锋干燥设备有限公司 | Flavoring-vibrofluidizing-and-drying system |
| WO2010019246A2 (en) * | 2008-08-12 | 2010-02-18 | Schwing Bioset | Closed loop drying system and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1619241A (en) * | 2004-12-08 | 2005-05-25 | 河南安彩高科股份有限公司 | Quartz sand raw material fluidized bed drying method for glass |
| CN1697094A (en) * | 2005-05-30 | 2005-11-16 | 苏州冠达磁业有限公司 | Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material |
| CN1927699A (en) * | 2006-09-20 | 2007-03-14 | 山东天力干燥设备有限公司 | Sodium percarbonate dry method granulation processes and apparatus thereof |
| CN201297822Y (en) * | 2008-08-11 | 2009-08-26 | 常州先锋干燥设备有限公司 | Flavoring-vibrofluidizing-and-drying system |
| WO2010019246A2 (en) * | 2008-08-12 | 2010-02-18 | Schwing Bioset | Closed loop drying system and method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332695A (en) * | 2013-06-13 | 2013-10-02 | 福建远翔化工有限公司 | Secondary drying method for white carbon black |
| CN103332695B (en) * | 2013-06-13 | 2015-08-19 | 福建远翔化工有限公司 | A kind of white carbon black redrying method |
| CN103768995A (en) * | 2014-01-28 | 2014-05-07 | 西安建筑科技大学 | Granulation method for ultrafine and nano soft magnetic ferrite powder |
| CN103768995B (en) * | 2014-01-28 | 2016-01-13 | 西安建筑科技大学 | A kind of prilling process of ultra-fine and nano soft magnetic ferrite powder |
| CN103836904A (en) * | 2014-03-17 | 2014-06-04 | 无锡市海昌机械设备有限公司 | Feeding system used for vacuum belt type powder continuous drying machine |
| CN113012924A (en) * | 2019-12-20 | 2021-06-22 | 合肥博微田村电气有限公司 | Preparation method of corrosion-resistant integrally-formed inductance powder |
| CN113012924B (en) * | 2019-12-20 | 2023-04-28 | 合肥博微田村电气有限公司 | Preparation method of corrosion-resistant integrated inductor powder |
| CN112648835A (en) * | 2020-09-16 | 2021-04-13 | 武汉青铜科技信息咨询有限公司 | High-efficient drying-machine of circulation for copper concentrate |
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Application publication date: 20120711 |