CN108187559A - A kind of high-efficiency stirring method and device of no volume gas iron-alumina melt - Google Patents

A kind of high-efficiency stirring method and device of no volume gas iron-alumina melt Download PDF

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Publication number
CN108187559A
CN108187559A CN201810010237.6A CN201810010237A CN108187559A CN 108187559 A CN108187559 A CN 108187559A CN 201810010237 A CN201810010237 A CN 201810010237A CN 108187559 A CN108187559 A CN 108187559A
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melt
iron
volume
graphite crucible
gas
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CN201810010237.6A
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杜云慧
张伟
张伟一
张鹏
王玉洁
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Beijing Jiaotong University
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Beijing Jiaotong University
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Priority to CN201810010237.6A priority Critical patent/CN108187559A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/451—Magnetic mixers; Mixers with magnetically driven stirrers wherein the mixture is directly exposed to an electromagnetic field without use of a stirrer, e.g. for material comprising ferromagnetic particles or for molten metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/26—Mixing ingredients for casting metals

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

The invention discloses a kind of high-efficiency stirring method and devices of no volume gas iron alumina melt, belong to the materials working research field such as metallurgical, casting, the present invention, which using inner wall is furnished with the variable volume graphite crucible of prismatic blade and stirs with high speed electromagnetic, to be combined mode iron alumina melt is stirred；Using variable volume graphite crucible, by reducing the volume of graphite crucible, all gas on melt top in graphite crucible is emptied, and under conditions of the isolation completely of melt and ambient atmos, under conditions of i.e. no gas source, the stirring of melt is carried out, and then melt volume gas is avoided from root；It is stirred using high speed electromagnetic, in the case where no volume gas fetters, iron alumina melt is made to generate circumferential high-speed stirred movement, utilize the prismatic blade on graphite crucible inner wall, internal iron alumina melt is constantly moved on into surrounding, the iron alumina melt on top is moved on into lower part, and then the floating of alumina particle and central segregation is prevented to move, so as to efficiently obtain the equally distributed iron alumina melt of the alumina particle of no volume gas, mixing time can shorten to 2 minutes, solve the problems, such as volume gas and stirring efficiency low technical present in the stirring of iron alumina melt.

Description

A kind of high-efficiency stirring method and device of no volume gas iron-alumina melt
Technical field
The invention belongs to the materials working research fields such as metallurgical, casting, more particularly to a kind of no volume gas iron-alumina melts High-efficiency stirring method and device.
Background technology
In the materials working research fields such as metallurgical, casting, it is often necessary to various melts are stirred, such as metal half Solid size, the stirring for adding particle melt etc., it is therefore an objective to make the homogenization such as temperature, ingredient, the tissue of melt.Stirring efficiency Stirring intensity is generally depended on, stirring intensity is bigger, and the shearing of formation and turbulent flow are stronger, and melt realizes temperature, ingredient, tissue etc. The mixing time of homogenization is shorter, and stirring efficiency is higher.However, strong stirring can lead to the volume gas problem of melt, easily High-temperature fusant oxidation, formation is caused to be mingled with tissue etc., even with protective atmosphere, volume gas can also make to spread stomata in melt, Material property is caused to deteriorate, it is seen then that volume gas problem has fettered the stirring intensity of melt, reduces stirring efficiency.Iron-aluminium oxide is multiple Condensation material contains the copper of 15wt% or so and the alumina particle of 5wt% or so, and the extension ability for having iron-based body concurrently is strong, thermal conductivity The advantages that energy is well and the hardness of alumina particle is high, thermal stability is good, wear-resistant, is widely used in nuclear energy, petrochemical industry, aviation The fields such as space flight and national defence.Due to 2054 DEG C of 1538 DEG C of fusing points for being higher than iron of fusing point of aluminium oxide, aluminium oxide is in iron liquid body In be existing in the form of solid granulates, in addition, 7.0~7.9g/cm of density due to iron3More than the density 3.9 of aluminium oxide ~4.1g/cm3, so alumina particle easily floats in iron-alumina melt, therefore, to expeditiously prepare Equally distributed iron-the alumina melt of alumina particle and then high performance iron-alumina composite material is obtained, must just increased To the stirring intensity of melt, such volume gas problem just more highlights.Authorization Notice No. CN105436436B, Authorization Notice No. CN The patents of invention such as 103307900B by the methods of " narrow stir chamber in melt liquid level ", " setting melt disturbance isolator " come Barrier agitation transmits to melt liquid level, avoids melt volume gas.The angle that the present invention completely cuts off completely from melt and gas carries out Creativity and innovation in terms of melt stirring has broken away from constraint of the volume gas to stirring intensity and stirring efficiency, can expeditiously prepare nothing Equally distributed iron-the alumina melt of alumina particle of volume gas.
Invention content
The technical problems to be solved by the invention are that volume gas present in iron-alumina melt stirring and stirring efficiency are low Problem provides a kind of high-efficiency stirring method and device of no volume gas iron-alumina melt.
The technical solution adopted by the present invention to solve the technical problems is：
The variable volume graphite crucible that prismatic blade is furnished with using inner wall is combined mode to iron-aluminium oxide with high speed electromagnetic stirring Melt is stirred；Using variable volume graphite crucible, by reducing the volume of graphite crucible, melt top in graphite crucible is emptied All gas, and under conditions of melt and ambient atmos completely isolation, i.e., under conditions of no gas source, carry out melt Stirring, and then melt volume gas is avoided from root；It is stirred using high speed electromagnetic, in the case where no volume gas fetters, makes iron-oxygen Change aluminum melt and generate circumferential high-speed stirred movement, using the prismatic blade on graphite crucible inner wall, constantly by internal iron-oxidation Aluminum melt moves on to surrounding, the iron-alumina melt on top is moved on to lower part, and then prevents the floating of alumina particle and center inclined Poly- movement, so as to efficiently obtain the equally distributed iron-alumina melt of the alumina particle of no volume gas.
The beneficial effects of the invention are as follows：Using the present invention, iron-alumina melt is stirred, can directly be prepared Iron-alumina melt that no volume gas, alumina particle are evenly distributed, mixing time can shorten to 2 minutes, stirring efficiency ratio Improve 250% within 7 minutes disclosed in CN102072670A patents, solve volume gas present in the stirring of iron-alumina melt and Stirring efficiency low technical problem.
Description of the drawings
Fig. 1 is the front view that the method for the present invention stirs iron-alumina melt device.
In figure, graphite crucible 2, prismatic blade 3, heating tube 4, cooling tube 5, iron-alumina melt 6, blocking 7, outer cover 8, bottom Frame 9, volume adjustment head 10, thermocouple 11, conical gas vent 12, blocking 13, trip bolt 14, spring 15, bearing shell 16, thrust Bearing 17, motor 18, transmission mechanism 19, guide plate 20, connection slide plate 21, buffer spring 22, connecting screw 23, guide groove 24, Rack 25, motor 26, transmission mechanism 27, stent 28.
Fig. 2 is the A-A views that the method for the present invention stirs iron-alumina melt device.
In figure, electromagnetic pole is to 1.
Fig. 3 is the B-B views that the method for the present invention stirs iron-alumina melt device.
Fig. 4 is the C-C views that the method for the present invention stirs iron-alumina melt device.
Fig. 5 is the D-D partial views that the method for the present invention stirs iron-alumina melt device.
Fig. 6 is the E-E partial views that the method for the present invention stirs iron-alumina melt device.
Fig. 7 is the water quenching microstructure of iron-alumina melt of the method for the present invention stirring.
Specific embodiment
The method of the present invention stirring iron-alumina melt device is described as follows with reference to attached drawing：
As Figure 1-Figure 4, the Efficient Agitator of no volume gas iron-alumina melt is mainly stirred by high speed electromagnetic and filled It puts, graphite crucible 2 and its volume adjustment device are formed with moving up and down device, thermocouple 11, blocking 7 and chassis 9.
As shown in Figure 1, Figure 2, Figure 4 shows, three pairs of electromagnetic poles of high speed electromagnetic agitating device are distributed on to 1 around graphite crucible 2, The distance between 2 outer wall of graphite crucible is 5mm, and electromagnetic pole is to 1 outside plus outer cover 8.
As shown in Figure 1, Figure 2, Figure 3 shows, graphite crucible 2 is fixed on using mechanical connection manner on chassis 9, graphite crucible 2 Heating tube 4 and cooling tube 5 uniformly at intervals in wall are connect respectively with external power supply with cooling liquid supply system；In graphite crucible 2 Upper inside wall is machined with internal thread, cooperates with the external screw thread of 10 lower end of volume adjustment head；Graphite crucible 2 internal thread with Under inner wall on prismatic blade 3 is distributed with, connect using mechanical connection manner with the inner wall of graphite crucible 2.Prismatic blade 3 is in graphite earthenware It is distributed on 2 different height of crucible in horizontal layer, the interval a of the lower edge of undermost prismatic blade 3 and the inner bottom surface of graphite crucible 2 For 0~20mm, the interval b between adjacent prismatic blade layer is 0~20mm, by adjusting a and b, make top layer prismatic blade 3 it is upper The lowermost interval c at edge and 2 internal thread of graphite crucible is maintained at 0~10mm, and the upper table of iron-alumina melt 6 faces upward The lowermost distance d for being higher by 2 internal thread of graphite crucible is 5~10mm.In same prismatic blade layer, the root of three prismatic blades 3 It is 120 ° that portion position, which is distributed on the inner wall of graphite crucible 2 i.e. interval α angle, and the length e of prismatic blade 3 is the half of graphite crucible 2 Diameter, width are 1/3rd of the radius of graphite crucible 2.On the length direction of each prismatic blade 3, the head of prismatic blade 3 On the basis of 2 horizontal circle center of graphite crucible is directed toward, tilted against the flow direction of iron-alumina melt 6, prismatic blade 3 Angle β with the 2 horizontal circumference line of centres of its root and graphite crucible is 25 °, constantly to melt internal iron-aluminium oxide Around body 6 moves on to；In the width direction of each prismatic blade 3, the upper blade of prismatic blade 3 descends blade against iron-aluminium oxide relatively The flow direction of melt 6 tilts, and the width direction of prismatic blade 3 and the angle γ of horizontal plane are 40 °, so as to constantly by top Iron-alumina melt 6 moves on to lower part.The root position of prismatic blade 3 in adjacent prismatic blade layer is on same level perspective plane It is 60 ° to be spaced δ angles.
As shown in Figure 1, Figure 4, Figure 5, the volume adjustment device of graphite crucible 2 is by volume adjustment head 10, blocking 13, fastening spiral shell Nail 14, spring 15 and driving device are formed, and are used to implement the volume adjustment of graphite crucible 2.Volume adjusts head 10, and material is stone Ink, upper part are round bar, and lower part is disk, and external screw thread is machined in disk side, the internal thread with 2 upper inside wall of graphite crucible It cooperates；Infundibulate gas vent 12 is equipped on disk.The rectangular tablet lower left quarter of blocking 13 is carried adjusts head 10 with volume Disk uniform thickness round platform, rectangular tablet right part is equipped with circular hole, and blocking 13 is limited in leakage by right part circular hole by trip bolt 14 In bucket shape gas vent 12, there is the gap of 1mm between the round platform of blocking 13 and infundibulate gas vent 12；Spring 15 is sleeved on trip bolt On 14 screw rod, effect is to jack up blocking 13, when screw-in reduces 2 volume of graphite crucible to volume adjustment head 10 downwards, just In the air discharge in graphite crucible 2；Rotate clockwise the rectangular handle at the top of trip bolt 14, the disk below handle The rectangular flat-plate compressed of blocking 13 is attached to the upper surface of volume adjustment 10 lower disk of head, seals infundibulate gas vent 12.It drives Dynamic device is made of motor 18, transmission mechanism 19 and detent mechanism, for volume adjustment head 10 to be driven to screw in downwards and rotation upwards Go out graphite crucible 2, be the key device for realizing the adjustment of 2 volume of graphite crucible；Transmission mechanism 19 is by turbine and worm screw, gear and tooth Wheel transmission is formed；Detent mechanism is located at the round bar top of volume adjustment head 10, and located lateral is carried out by upper and lower two bearing shells 16, by Upper and lower two thrust bearings 17 carry out longitudinal register；Motor 18, transmission mechanism 19 and the detent mechanism of driving device are respectively adopted Mechanical connection manner is fixed on guide plate 20, carries out moving down in the guide groove 24 that guide plate 20 can be on stent 28 be fixed on It is dynamic.
As shown in Fig. 1, Fig. 6, move up and down device by motor 26, transmission mechanism 27, connection slide plate 21, buffer spring 22, Connecting screw 23 is formed.Transmission mechanism 27 is made of rack 25 and gear, turbine and worm-drive, the lower end of rack 25 and connection Slide plate 21 is connected using mechanical connection manner.In the guide groove 24 that connection slide plate 21 can be on stent 28 be fixed on move down It is dynamic, and pass through buffer spring 22 and connecting screw 23 is connect with guide plate 20, volume is made to adjust above and below head 10 and its driving device It is mobile.In bearer connection screw rod 23, guide plate 20, volume adjustment head 10 and its driving device, thermocouple 11, blocking 13, fastening After the related components such as screw 14, spring 15, the decrement of buffer spring 22 is also greater than the maximum of 2 internal thread of graphite crucible Screw-in depth.Move up and down the motor 26 of device, transmission mechanism 27 is fixed on using mechanical connection manner on stent 28.
As Figure 1 and Figure 4, thermocouple 11 is fixed on volume adjustment head 10, and lower end connects with iron-alumina melt 6 It touches, stretches into 4mm in iron-alumina melt 6, block 7 bottoms for being located at graphite crucible 2.
A kind of high-efficiency stirring method of no volume gas iron-alumina melt is furnished with the variable volume of prismatic blade using above-mentioned inner wall Graphite crucible is combined mode with high speed electromagnetic stirring and iron-alumina melt is stirred；Using variable volume graphite crucible, lead to The volume of the small graphite crucible of over-subtraction empties all gas on melt top in graphite crucible, and complete with ambient atmos in melt Under conditions of full isolation, i.e., under conditions of no gas source, the stirring of melt is carried out, and then melt volume gas is avoided from root； It is stirred using high speed electromagnetic, in the case where no volume gas fetters, iron-alumina melt is made to generate circumferential high-speed stirred movement, profit With the prismatic blade on graphite crucible inner wall, constantly by internal iron-alumina melt move on to around, by the iron-oxidation on top Aluminum melt moves on to lower part, and then the floating of alumina particle and central segregation is prevented to move, so as to efficiently obtain no volume gas The equally distributed iron-alumina melt of alumina particle.Include the following steps：
Step 1, iron-alumina melt is prepared, temperature is controlled at 1600 DEG C；
Step 2, above-mentioned iron-alumina melt to be poured into graphite crucible 2, the preheating temperature of graphite crucible 2 is 1600 DEG C, Preheating is realized by the heating tube 4 in its wall；
Step 3, start and move up and down device, the external screw thread of 10 lower end of volume adjustment head is dropped into edge on graphite crucible 2 Internal thread at, closing move up and down device；Start the driving device of volume adjustment head 10, by the external screw thread of volume adjustment head 10 It screws in the internal thread of graphite crucible 2, when iron-alumina melt 6 starts along the round platform of blocking 13 and infundibulate gas vent 12 Between gap, when being overflowed from the lower part of the rectangular tablet of blocking 13, close the driving device of volume adjustment head 10；It twists clockwise Tight trip bolt 14, infundibulate gas vent 12 is sealed, melt is made to completely cut off completely with ambient atmos；
Step 4, thermocouple 11 is connected, using thermocouple 11 to external power supply and cooling liquid supply system input information, is adjusted Heating tube 4 and cooling tube 5 are saved, makes the temperature stabilization of iron-alumina melt 6 at 1600 DEG C, starts high speed electromagnetic agitating device, it is right Iron-alumina melt 6 carries out Isothermal stirring, stablizes stirring 2 minutes or so；
Step 5, closing high-speed electromagnetic mixing apparatus unscrews trip bolt 14 counterclockwise, makes blocking 13 in the work of spring 15 It is bounced under, iron-alumina melt 6 can be released by opening blocking 7, for using.
Fig. 7 is the water quenching microstructure of iron-alumina melt of the method for the present invention stirring, and darker regions are iron-based in figure Body, light areas are alumina particle, it is seen then that do not have stomata on iron-based body, alumina particle is evenly distributed in iron-based body.
Embodiment one, the power of high speed electromagnetic agitating device is 20kW, rotating speed is 900 revs/min, a 0mm, b are Under conditions of 0mm, c 0mm, d are 5mm, after stablizing stirring 50 seconds 1 minute, no volume gas can obtain, alumina particle is evenly distributed Iron-alumina melt 6.
Embodiment two, the power of high speed electromagnetic agitating device is 20kW, rotating speed is 1200 revs/min, a 20mm, b are Under conditions of 20mm, c 10mm, d are 10mm, after stablizing stirring 2 minutes, no volume gas can obtain, alumina particle is evenly distributed Iron-alumina melt 6.
As it can be seen that under the premise of being emptied using variable volume graphite crucible and completely cutting off contact of the gas with melt, and then in big work( Under rate, high speed electromagnetic stirring condition, the method for the present invention can expeditiously prepare no volume gas, alumina particle is evenly distributed iron- Alumina melt.

Claims (4)

  1. A kind of 1. high-efficiency stirring method of no volume gas iron-alumina melt, which is characterized in that the change of prismatic blade is furnished with using inner wall Volume graphite crucible is combined mode with high speed electromagnetic stirring and iron-alumina melt is stirred；Utilize variable volume graphite earthenware Crucible by reducing the volume of graphite crucible, empties all gas on melt top in graphite crucible, and in melt and extraneous gas Under conditions of body isolation completely, i.e., under conditions of no gas source, the stirring of melt is carried out, and then melt is avoided to roll up from root Gas；It is stirred using high speed electromagnetic, in the case where no volume gas fetters, iron-alumina melt is made to generate circumferential high-speed stirred movement, Using the prismatic blade on graphite crucible inner wall, constantly by internal iron-alumina melt move on to around, by the iron-oxygen on top Change aluminum melt and move on to lower part, and then the floating of alumina particle and central segregation is prevented to move, so as to efficiently obtain no volume Equally distributed iron-the alumina melt of alumina particle of gas, includes the following steps：
    Step 1, iron-alumina melt is prepared, temperature is controlled at 1600 DEG C；
    Step 2, above-mentioned iron-alumina melt is poured into graphite crucible, the preheating temperature of graphite crucible is 1600 DEG C, by its wall Interior heating tube realizes preheating；
    Step 3, start and move up and down device, the external screw thread of volume adjustment head lower end is dropped to the internal thread on edge on graphite crucible Place, closing move up and down device；Start the driving device of volume adjustment head, volume adjustment head is screwed into graphite crucible Internal thread in, when iron-alumina melt start along between the round platform of blocking and infundibulate gas vent gap, from blocking When the lower part of rectangular tablet is overflowed, the driving device of volume adjustment head is closed；Trip bolt is tightened clockwise, infundibulate is deflated Mouth seals, and melt is made to completely cut off completely with ambient atmos；
    Step 4, thermocouple is connected, using thermocouple to external power supply and cooling liquid supply system input information, adjusts heating tube And cooling tube, make the temperature stabilization of iron-alumina melt at 1600 DEG C, start high speed electromagnetic agitating device, iron-aluminium oxide is melted Body carries out Isothermal stirring, stablizes stirring 2 minutes；
    Step 5, closing high-speed electromagnetic mixing apparatus unscrews trip bolt counterclockwise, and blocking is made to bounce under the action of the spring, beats Iron-alumina melt can be released by opening blocking, for using；
  2. 2. the high-efficiency stirring method of a kind of no volume gas iron-alumina melt according to claim 1, which is characterized in that high The rotating speed of fast electromagnetic mixing apparatus is 900~1200 revs/min.
  3. 3. a kind of Efficient Agitator of no volume gas iron-alumina melt, the device include：High speed electromagnetic agitating device, graphite Crucible 2 and its volume adjustment device are with moving up and down device, thermocouple 11, blocking 7 and chassis 9；It is characterized in that：
    Internal thread is machined in the upper inside wall of graphite crucible 2, is cooperated with the external screw thread of 10 lower end of volume adjustment head；Graphite The volume adjustment device of crucible 2 is made of volume adjustment head 10, blocking 13, trip bolt 14, spring 15 and driving device, is used for Realize the volume adjustment of graphite crucible 2；Volume adjusts head 10, and material is graphite, and upper part is round bar, and lower part is disk, in circle Disc side is machined with external screw thread, cooperates with the internal thread of 2 upper inside wall of graphite crucible；Infundibulate is equipped on disk to deflate Mouth 12；The rectangular tablet lower left quarter of blocking 13 carries the round platform with the disk uniform thickness of volume adjustment head 10, and rectangular tablet right part is set There is circular hole, blocking 13 is limited in by trip bolt 14 in infundibulate gas vent 12 by right part circular hole, the round platform of blocking 13 and leakage There is the gap of 1mm between bucket shape gas vent 12；Spring 15 is sleeved on the screw rod of trip bolt 14, and effect is to jack up blocking 13, When screw-in reduces 2 volume of graphite crucible to volume adjustment head 10 downwards, convenient for the air discharge in graphite crucible 2；Clockwise The rectangular flat-plate compressed of blocking 13 can be attached to volume tune by the rectangular handle at the top of rotational fastener screw 14, the disk below handle The upper surface of whole 10 lower disk of head, seals infundibulate gas vent 12；Driving device is by motor 18, transmission mechanism 19 and positioning Mechanism is formed, and is to realize 2 volume of graphite crucible for volume adjustment head 10 to be driven to screw in downwards and screws out graphite crucible 2 upwards The key device of adjustment；Transmission mechanism 19 is made of turbine and worm screw, gear and gear drive；Detent mechanism is located at volume adjustment First 10 round bar top, located lateral is carried out by upper and lower two bearing shells 16, and longitudinal register is carried out by upper and lower two thrust bearings 17； Motor 18, transmission mechanism 19 and the detent mechanism of driving device are respectively adopted mechanical connection manner and are fixed on guide plate 20, lead It is moved up and down into the guide groove 24 that plate 20 can be on stent 28 be fixed on；Device is moved up and down by motor 26, driver Structure 27, connection slide plate 21, buffer spring 22, connecting screw 23 are formed；Transmission mechanism 27 is by rack 25 and gear, turbine and worm screw Transmission is formed, and the lower end of rack 25 is connected with connecting slide plate 21 using mechanical connection manner；Connection slide plate 21 can be fixed on branch It is moved up and down in guide groove 24 on frame 28, and passes through buffer spring 22 and connecting screw 23 is connect with guide plate 20, made Volume adjusts head 10 and its driving device moves up and down；In bearer connection screw rod 23, guide plate 20, volume adjustment head 10 and its drive After the related components such as dynamic device, thermocouple 11, blocking 13, trip bolt 14, spring 15, the decrement of buffer spring 22 is also It is greater than the maximum screw-in depth of 2 internal thread of graphite crucible；Move up and down the motor 26 of device, transmission mechanism 27 is connected using machinery The mode of connecing is fixed on stent 28；
  4. 4. a kind of Efficient Agitator of no volume gas iron-alumina melt according to claim 3, which is characterized in that iron- The lowermost distance d that the upper table of alumina melt 6 is higher by upwardly 2 internal thread of graphite crucible is 5~10mm.
CN201810010237.6A 2018-01-05 2018-01-05 A kind of high-efficiency stirring method and device of no volume gas iron-alumina melt Withdrawn CN108187559A (en)

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CN201810010237.6A CN108187559A (en) 2018-01-05 2018-01-05 A kind of high-efficiency stirring method and device of no volume gas iron-alumina melt

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CN108187559A true CN108187559A (en) 2018-06-22

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