CN103247404A - Device for producing aluminum-clad oxidation soft magnet powder through screw mixing method - Google Patents
Device for producing aluminum-clad oxidation soft magnet powder through screw mixing method Download PDFInfo
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- CN103247404A CN103247404A CN 201210028049 CN201210028049A CN103247404A CN 103247404 A CN103247404 A CN 103247404A CN 201210028049 CN201210028049 CN 201210028049 CN 201210028049 A CN201210028049 A CN 201210028049A CN 103247404 A CN103247404 A CN 103247404A
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Abstract
A device for producing aluminum-clad oxidation soft magnet powder through a screw mixing method is characterized in that a screw mixer is installed at a powder collecting port of an iron powder production device through an aerial fog method, the screw mixer is composed of a screw flow passage, an inlet of the screw flow passage is directly mounted at the powder collecting port of the iron powder production device through an aerial fog method, an outlet is a powder discharge port, a molten aluminum injection pipe is installed on the outer annular wall of the screw flow passage, atomizing gas carrying iron powder for powder production enters the powder collecting port and is discharged after passing through the screw flow passage, the iron powder moves along the outer cylindrical surface of the screw flow passage, and molten aluminum is spread at the molten aluminum injection position and solidifies on the surface of the iron powder to form an aluminum layer to achieve aluminum cladding after being blown out of the outlet of the flow passage.
Description
Technical field
The technical field of the invention is that pressed powder coats the field fast, coats the process units of oxidizing process soft magnetism iron powder in particular for aluminium.
Background technology
The quick alfer coating layer that coats fine aluminium or contain small amounts of iron on the iron based soft magnetic powder surface has been proposed in application for a patent for invention " aluminium coats oxidizing process soft magnetism ferrocart core " (application number 201110199915.6), form the second best in quality oxide-film by method for oxidation, behind the product press forming, pass through higher temperature heat treatment again, finish alloying and annealing in process, reduce the method for magnetic hysteresis loss.Because aluminium and iron at high temperature easily form alloy, how fast aluminium to be coated on the iron powder surface, it is the difficult point of this method, the existing method pressed powder method for coating that mixes, be certain amount of fluid and a certain amount of solid are mixed stir again by, liquid phase evaporation, liquid phase is solidified or method such as liquid phase curing realizes the coating of pressed powder, the existing pressed powder method for coating that mixes method is difficult to realize quick coating, and the blade that stirs under the high temperature, bearing, sealing are to material and technological requirement height; Existing fluid bed pressed powder method for coating; movement-less part; but because pressed powder place suspended state; be unfavorable for being in contact with one another between the powder; be unfavorable for quick coating; the aluminium method for coating that proposes in " aluminium coats oxidizing process soft magnetism ferrocart core " patent application is that solid-liquid mixes; gas blows the spray method; be that original iron base soft magnetic powder and aluminum feedstock are heated in the different vessels of band protective atmosphere; the iron based soft magnetic powder of heat and ferro-aluminum liquation are introduced screw mixes mechanism by passage; make particle and ferro-aluminum liquation rapid mixing by the screw rod rotation; and push hybrid particles to gas spout; can realize the quick cladding iron powder of aluminium on this theoretical method; but two shortcomings are arranged, screw rod under (1) high temperature; bearing; sealing is to material and technological requirement height, and iron powder has plasticity under the high temperature; screw rod can be with iron powder crimp; (2) because aluminium liquid is sprayed on the screw rod, cyclic variation appears in the ratio of iron powder and aluminium liquid, is unfavorable for making the aluminum layer thickness that coats on the iron powder even.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and can low-costly realize the quick process units that aluminium is coated on the iron powder surface.
Technical scheme of the present invention is: the powder collection mouth at aeroponics PRODUCTION OF IRON POWDER device is installed ribbon mixer, ribbon mixer is made up of spiral runner, spiral runner entrance is directly installed on the aeroponics PRODUCTION OF IRON POWDER device powder collection mouth, outlet is the powder outlet, aluminium liquid flow in pipes is installed on the spiral runner external annulus, the atomization gas of powder process carries iron powder and enters the powder collection mouth, gets rid of behind spiral flow channel, during iron powder process spiral flow channel, because action of centrifugal force, iron powder concentrates on the outer inwall of helical flow path mobile; Make tangent line from the inner cylinder of runner spiral starting point, with the outer cylinder joining be the minimum distance of aluminium liquid flow in pipes entrance and runner spiral starting point, to guarantee that aluminium liquid injection place iron powder powder moves along outer cylinder, and smear aluminium liquid in injection place of aluminium liquid, the iron powder band aluminium liquid again along mobile on the outer inwall of the spiral runner of back segment, the rolling on flow path wall by powder mutual extrusion and powder, aluminium liquid evenly is coated on the iron powder surface, after blowing out from runner exit, aluminium liquid forms aluminium lamination in the iron powder surface solidification, realizes that aluminium coats.
The helical flow path of optimizing is divided into upper level axle spiral section, with lower vertical axle spiral section, aluminium liquid inlet is installed in the bottom of upper level spiral shaft part, the inwall of flow in pipes and flat spin shaft part inwall on the lower are tangent, because the effect of gravity, aluminium liquid can inject along inwall on the lower, iron powder since action of centrifugal force also impact on the lower inwall, constantly take away aluminium liquid, keep the stable of aluminium liquid forward position, helical flow path by the tube of material circle around forming, perhaps combined with the center core bar by inner screw channel shape pipe, upper level axle spiral section can adopt and be split into two parts from the centre, and the mode of processing back combination is made respectively, also can adopt after the tube of material bending mode of welding of aluminum flow in pipes to make.
Optional helical flow path is one-part form, aluminium liquid peace ascending pipe is installed on the outer wall of any direction of helical flow path, the helical axis directions of spiral flow channel can arrange arbitrarily, will dwindle aluminium liquid ascending pipe inlet diameter this moment, or aluminium liquid inlet is made as narrow slit type, improve aluminium liquid and inject flow velocity, eliminate the influence of aluminium liquid injection place gravity.
The dust outlet of optimizing is installed the water body closed chamber, the water body closed chamber is inner gland chamber and outer water body chamber, in, the bottom of the demarcation strip between the external space is intercommunicating pore, this intercommunicating pore is discharge opening, interior or exterior space all fills the deionized water that has added triethanolamine (or other oxidation catalyst), the water body height is higher than the discharge opening height, the separation of space and the external space in realizing, the interior space of water body closed chamber is connected with the can of ribbon mixer and seals, on the inner gland chamber shell gas vent is installed, after atomization gas (being preferably argon gas) is discharged along gas vent, through dedusting, dehydration, hydrogen content control back is recycling, the powder of dust outlet directly sprays in the deionized water, and formation oxide-film, the conveyor type powder conveyance device is installed between interior or exterior space, is realized receiving continuously powder, adjust the thickness of powder oxide-film by the speed of adjusting conveyer belt.
Beneficial effect of the present invention is: the present invention compares with mechanical mixture coating methods such as the method for mixing, screw mixes, movement-less part, and Materials And Process Requirement is lower; Compare with the gas mixing method of fluidized bed type, increased between the powder and the touch opportunity of powder and runner, realize easily coating fast; The present invention realizes that powder process and coating work continuously, and is conducive to energy savings.
Description of drawings
Fig. 1 is that spiral mixing method aluminium coats oxidation soft magnetism iron powder process units overall structure figure.
Embodiment
Atomizer among Fig. 1 (1) is installed in smelting furnace assembly (2) bottom, stopper control device (3) is installed on smelting furnace (2) top, spray chamber assembly (4) is installed in the atomizer bottom, above-mentioned four partly is conventional aerosol powder process mechanism, be not limited to shown in Figure 1, various ways can be arranged, the bottom of spray chamber assembly (4) is installed trunnion axis helical flow path and aluminium liquid injecting mechanism (5) successively, vertical axis helical flow path assembly (6), powder spout (605), powder spout (605) communicates with the inner chamber of water body closed chamber (8), and conveyor type powder conveying device (9) is installed in the water body closed chamber.
Spray chamber assembly (4) is by atomizing cup (401), and heating collar (402), heat-insulation layer (403), shell (404) are installed with one heart, and powder collection mouth (405) is installed in atomizing cup (401) bottom.
Trunnion axis helical flow path and aluminium liquid injecting mechanism (5) inject runner (502) by trunnion axis helical flow path (501) and aluminium liquid and constitute, the helical axis level of trunnion axis helical flow path (501), the inner cylinder down of aluminium liquid injection runner (502) and helical flow path (501) are inner, and cylinder is tangent down.
Vertical axis helical flow path assembly (6) is made of vertical axis helical flow path (601), heating collar (602), heat-insulation layer (603), shell (604), and powder spout (605) is installed in vertical axis helical flow path (601) bottom.
The aluminium liquid that the trunnion axis helical flow path of present embodiment and aluminium liquid injecting mechanism (5) make aluminium liquid inject runner forms the inner thin aluminium liquid layer of cylinder on the lower under the effect of gravity, iron powder also moves near the cylinder in inside under action of centrifugal force on the lower, be conducive to aluminium liquid and mix with iron powder, so helical flow path is two-part (trunnion axis helical flow path and vertical axis helical flow path); Change narrow slit type into if reduce diameter or the aluminium liquid entrance of aluminium liquid entrance, the influence of gravity also can be adopted single helical flow path when reduction aluminium liquid entered, and the helical axis of helical flow path also can arrange arbitrarily.
The trunnion axis helical flow path of present embodiment and aluminium liquid injecting mechanism (5), combine after being machined by two rectangle materials, vertical axis helical flow path (601) by the tubular material circle around forming, certainly also can adopt alternate manner, as: the vertical axis helical flow path adopts inside spin barrel and core bar compound mode to make, and trunnion axis helical flow path and aluminium liquid injecting mechanism (5) take the mode of weldering aluminium liquid ascending pipe on the bend pipe to make.
Aluminium liquid smelting furnace (7) is made of crucible (701), heating collar (702), heat-insulation layer (703), shell (704), bell (706), aluminium liquid pipe (706) injects runner (502) with aluminium liquid and communicates, aluminium liquid pipe (707) inserts in the crucible, and aluminium liquid pipe (707) has heating collar (708), heat-insulation layer (709) and shell (710) on every side.
Water body closed chamber (8) is for to be divided into inner gland chamber (802) and outer water body chamber (803) by demarcation strip (801), be communicated with by demarcation strip (801) lower openings between inner gland chamber (802) and the outer water body chamber (803), the water body closed chamber fills deionized water in (8), preferred version is to fill the deionized water that has added oxidation catalysts such as triethanolamine, this deionized water plays sealing inner gland chamber (802), make the aluminium lamination surface that is coated on the iron powder form oxide layer simultaneously, shell (604) sealing of the upper shed of inner gland chamber and vertical axis helical flow path assembly (6) links, the outlet of powder spout (605) is installed steam vent (804) on the shell of inner gland chamber (802) in inner gland chamber (802).
Conveyor type powder conveying device (9) is installed in the water body closed chamber (8), and the soft magnetic powder that machines transports out in inner gland chamber by conveyer belt.
Atomization gas (preferred argon gas) from steam vent (804) is discharged reenters production procedure through cooling, dedusting, dehydration, hydrogen content control.
In order to prevent that aluminium liquid and high temperature iron powder from corroding atomizer, mist pipe, helical flow path, aluminium liquid pipe, atomizer, mist pipe and helical flow path should adopt pottery or ceramic coating, the ceramic coating technology of optimizing is made the device matrix for adopting iron, the device matrix carry out hot-dip aluminizing, anodic aluminum oxide layer forms aluminum oxide coating layer again.
Claims (3)
1. an aluminium coats the process units of oxidizing process soft magnetism iron powder, it is characterized in that at the powder collection mouth of aeroponics PRODUCTION OF IRON POWDER device ribbon mixer being installed, ribbon mixer is made up of spiral runner, spiral runner entrance is directly installed on the aeroponics PRODUCTION OF IRON POWDER device powder collection mouth, outlet is the powder outlet, aluminium liquid flow in pipes is installed on the spiral runner external annulus, the atomization gas of powder process carries iron powder and enters the powder collection mouth, behind spiral flow channel, get rid of, during iron powder process spiral flow channel, because action of centrifugal force, iron powder concentrates on the outer inwall of helical flow path mobile; Make tangent line from the inner cylinder of runner spiral starting point, with the outer cylinder joining be the minimum distance of aluminium liquid flow in pipes entrance and runner spiral starting point, to guarantee that aluminium liquid injection place iron powder powder moves along outer cylinder, and smear aluminium liquid in injection place of aluminium liquid, the iron powder band aluminium liquid again along mobile on the outer inwall of the spiral runner of back segment, the rolling on flow path wall by powder mutual extrusion and powder, aluminium liquid evenly is coated on the iron powder surface, after blowing out from runner exit, aluminium liquid forms aluminium lamination in the iron powder surface solidification, realizes that aluminium coats.
2. aluminium according to claim 1 coats oxidation soft magnetism iron powder and process units, it is characterized in that, the helical flow path of optimizing is divided into upper level axle spiral section, with lower vertical axle spiral section, aluminium liquid inlet is installed in the bottom of upper level spiral shaft part, and the inwall of flow in pipes and flat spin shaft part inwall on the lower are tangent.
3. aluminium according to claim 1 coats oxidation soft magnetism iron powder and process units, it is characterized in that the dust outlet optimized installs the water body closed chamber, the water body closed chamber is inner gland chamber and outer water body chamber, in, the bottom of the demarcation strip between the external space is intercommunicating pore, this intercommunicating pore is discharge opening, interior or exterior space all fills the deionized water that has added triethanolamine (or other oxidation catalyst), the water body height is higher than the discharge opening height, the separation of space and the external space in realizing, the interior space of water body closed chamber is connected with the can of ribbon mixer and seals, on the inner gland chamber shell gas vent is installed, after atomization gas (being preferably argon gas) is discharged along gas vent, through dedusting, dehydration, hydrogen content control back is recycling, the powder of dust outlet directly sprays in the deionized water, and forms oxide-film, and the conveyor type powder conveyance device is installed between interior or exterior space, realize receiving continuously powder, adjust the thickness of powder oxide-film by the speed of adjusting conveyer belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210028049 CN103247404A (en) | 2012-02-09 | 2012-02-09 | Device for producing aluminum-clad oxidation soft magnet powder through screw mixing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210028049 CN103247404A (en) | 2012-02-09 | 2012-02-09 | Device for producing aluminum-clad oxidation soft magnet powder through screw mixing method |
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| CN103247404A true CN103247404A (en) | 2013-08-14 |
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| CN 201210028049 Pending CN103247404A (en) | 2012-02-09 | 2012-02-09 | Device for producing aluminum-clad oxidation soft magnet powder through screw mixing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584223A (en) * | 2020-04-02 | 2020-08-25 | 湖南纳金新材料技术有限公司 | Preparation method of high-resistance flaky soft magnetic powder |
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2012
- 2012-02-09 CN CN 201210028049 patent/CN103247404A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584223A (en) * | 2020-04-02 | 2020-08-25 | 湖南纳金新材料技术有限公司 | Preparation method of high-resistance flaky soft magnetic powder |
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Application publication date: 20130814 |