CN107983245A - A kind of high-efficiency stirring method and device of no volume gas iron-graphite melt - Google Patents

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

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Publication number
CN107983245A
CN107983245A CN201810010263.9A CN201810010263A CN107983245A CN 107983245 A CN107983245 A CN 107983245A CN 201810010263 A CN201810010263 A CN 201810010263A CN 107983245 A CN107983245 A CN 107983245A
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graphite
melt
iron
volume
graphite crucible
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CN201810010263.9A
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张鹏
张伟
张伟一
杜云慧
王玉洁
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Beijing Jiaotong University
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Beijing Jiaotong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/451Magnetic 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00Stirring devices for molten material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/26Mixing ingredients for casting metals

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention discloses a kind of high-efficiency stirring method and device of no volume gas iron-stone ink melt, belong to the material 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-stone ink melt is stirred;Using variable volume graphite crucible, by reducing the volume of graphite crucible, all gas on melt top in graphite crucible are 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;Stirred using high speed electromagnetic, in the case where no volume gas fetters, iron-stone ink melt is set to produce circumferential high-speed stirred movement, utilize the prismatic blade on graphite crucible inner wall, internal iron-stone ink melt is constantly moved on into surrounding, the iron-stone ink melt on top is moved on into lower part, and then the floating of graphite particle and central segregation is prevented to move, so as to efficiently obtain the equally distributed iron-stone ink melt of graphite 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-stone ink melt.

Description

A kind of high-efficiency stirring method and device of no volume gas iron-graphite melt
Technical field
The invention belongs to material working research fields such as metallurgical, castings, more particularly to a kind of no volume gas iron-graphite melt High-efficiency stirring method and device.
Background technology
In the material working research fields such as metallurgical, casting, it is often necessary to various melts are stirred, such as metal half Solid size, the stirring etc. for adding particle melt, it is therefore an objective to homogenize the temperature of melt, component, tissue etc..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, component, tissue etc. The mixing time of homogenization is shorter, and stirring efficiency is higher.However, strong stirring can cause 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-graphite is compound Material contains the copper of 15wt% or so and the graphite particle of 3wt% or so, and the extension ability for having iron-based body concurrently is strong, good heat conductivity The advantages that well especially high temperature lubrication property is good, arc ablation resistance ability is strong with the greasy property of graphite particle, is to prepare high temperature Friction parts, electric contact part, the ideal material of machine components.Due to 3652 DEG C of fusing points 1538 for being higher than iron of fusing point of graphite DEG C, therefore graphite is existing in the form of solid granulates, further, since 7.0~7.9g/cm of density of iron in iron liquid body3 More than 1.9~2.2g/cm of density of graphite3, so graphite particle easily floats in iron-graphite melt, therefore, to Expeditiously prepare the equally distributed iron-graphite melt of graphite particle and then obtain high performance iron-graphite composite material, just must The stirring intensity to melt must be increased, such volume gas problem just more highlights.Authorization Notice No. CN105436436B, authorize public affairs The patents of invention such as announcement CN 103307900B pass through " narrowing the melt liquid level in stir chamber ", " setting melt disturbance isolator " The methods of come obstruct agitation to melt liquid level transmission, avoid melt volume gas.The angle that the present invention completely cuts off completely from melt and gas Set out, carry out the creativity and innovation in terms of melt stirring, broken away from constraint of the volume gas to stirring intensity and stirring efficiency, can high efficiency Ground prepares the equally distributed iron-graphite melt of graphite particle without volume gas.
The content of the invention
The technical problems to be solved by the invention are, volume gas present in the stirring of iron-graphite melt and stirring efficiency is low asks A kind of topic, there is provided high-efficiency stirring method and device of no volume gas iron-graphite melt.
The technical solution adopted by the present invention to solve the technical problems is:
The variable volume graphite crucible of prismatic blade is furnished with using inner wall it is combined mode with high speed electromagnetic stirring and iron-graphite is melted Body 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 the isolation completely of melt and ambient atmos, i.e., under conditions of no gas source, carry out melt Stirring, and then melt volume gas is avoided from root;Stirred using high speed electromagnetic, in the case where no volume gas fetters, make iron-graphite Melt produces circumferential high-speed stirred movement, using the prismatic blade on graphite crucible inner wall, constantly by internal iron-graphite melt Around moving on to, the iron-graphite melt on top is moved on to lower part, and then prevents the floating of graphite particle and central segregation from moving, from And the equally distributed iron-graphite melt of graphite particle for efficiently obtaining no volume gas.
The beneficial effects of the invention are as follows:Using the present invention, iron-graphite melt is stirred, can directly prepare nothing The iron-graphite melt that volume gas, graphite particle are evenly distributed, mixing time can shorten to 2 minutes, stirring efficiency ratio Improve 300% within 8 minutes disclosed in CN102114394A patents, solve volume gas present in the stirring of iron-graphite melt and stir Mix efficiency low technical problem.
Brief description of the drawings
Fig. 1 is the front view that the method for the present invention stirs iron-graphite melt device.
In figure, graphite crucible 2, prismatic blade 3, heating tube 4, cooling tube 5, iron-graphite melt 6, blocking 7, outer cover 8, chassis 9, volume adjustment first 10, thermocouple 11, conical gas vent 12, blocking 13, trip bolt 14, spring 15, bearing shell 16, thrust shaft 17 are held, motor 18, transmission mechanism 19, guide plate 20, connects slide plate 21, buffer spring 22, connecting screw 23, guide groove 24, tooth Bar 25, motor 26, transmission mechanism 27, stent 28.
Fig. 2 is the A-A views that the method for the present invention stirs iron-graphite 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-graphite melt device.
Fig. 4 is the C-C views that the method for the present invention stirs iron-graphite melt device.
Fig. 5 is the D-D partial views that the method for the present invention stirs iron-graphite melt device.
Fig. 6 is the E-E partial views that the method for the present invention stirs iron-graphite melt device.
Fig. 7 is the water quenching microstructure of the iron-graphite melt of the method for the present invention stirring.
Embodiment
The method of the present invention stirring iron-graphite melt device is described as follows with reference to attached drawing:
As Figure 1-Figure 4, the Efficient Agitator of no volume gas iron-graphite melt mainly by high speed electromagnetic agitating device, 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 chassis 9 using mechanical connection manner, graphite crucible 2 Heating tube 4 and cooling tube 5 uniformly at intervals in wall, are connected with external power supply with cooling liquid supply system respectively;In graphite crucible 2 Upper inside wall is machined with internal thread, and the external screw thread that first 10 lower end is adjusted with volume cooperates;Graphite crucible 2 internal thread with Under inner wall on prismatic blade 3 is distributed with, be connected 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 the superiors 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-graphite melt 6 is high upwardly The lowermost distance d for going out 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 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 radius of graphite crucible 2, Width is 1/3rd of the radius of graphite crucible 2.On the length direction of each prismatic blade 3, the head of prismatic blade 3 is referring to To on the basis of 2 horizontal circle center of graphite crucible, tilted against the flow direction of iron-graphite melt 6, prismatic blade 3 and its root The angle β of portion and the horizontal circumference line of centres of graphite crucible 2 is 22 °, constantly to move on to internal iron-graphite melt 6 Around;On the width of each prismatic blade 3, the upper blade of prismatic blade 3 descends stream of the blade against iron-graphite melt 6 relatively Dynamic direction tilts, and the width of prismatic blade 3 and the angle γ of horizontal plane are 43 °, constantly to melt the iron-graphite on top Body 6 moves on to lower part.Interval δ angle of the root position of prismatic blade 3 in adjacent prismatic blade layer on same level perspective plane is 60°。
As shown in Figure 1, Figure 4, Figure 5, the volume adjustment device of graphite crucible 2 adjusts first 10, blocking 13, fastening spiral shell by volume Nail 14, spring 15 and driving device are formed, and are used for realization the volume adjustment of graphite crucible 2.Volume adjustment first 10, material is stone Ink, its upper part are round bar, and lower part is disk, and external screw thread is machined with disk side, the internal thread with 2 upper inside wall of graphite crucible Cooperate;Infundibulate gas vent 12 is equipped with disk.The rectangular tablet lower left quarter of blocking 13 carries and volume adjustment first 10 Disk uniform thickness round platform, rectangular tablet right part is equipped with circular hole, and blocking 13 is limited in Lou 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 and infundibulate gas vent 12 of blocking 13;Spring 15 is sleeved on trip bolt On 14 screw rod, it is to jack up blocking 13 that it, which is acted on, when screw-in reduces 2 volume of graphite crucible downwards for volume adjustment first 10, 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 first 10 lower disk of volume adjustment, seals infundibulate gas vent 12.Drive Dynamic device is made of motor 18, transmission mechanism 19 and detent mechanism, for driving volume adjustment first 10 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 that volume adjusts first 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, and guide plate 20 can carry out moving down in the guide groove 24 being fixed on stent 28 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.Connection slide plate 21 can carry out moving down in the guide groove 24 being fixed on stent 28 It is dynamic, and be connected by buffer spring 22 and connecting screw 23 with guide plate 20, make above and below volume adjustment first 10 and its driving device It is mobile.In bearer connection screw rod 23, guide plate 20, volume adjustment first 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 stent 28 using mechanical connection manner.
As Figure 1 and Figure 4, thermocouple 11 is fixed in volume adjustment first 10, its bottom connects with iron-graphite melt 6 Touch, stretch into 4mm in iron-graphite melt 6, block 7 bottoms for being located at graphite crucible 2.
A kind of high-efficiency stirring method of no volume gas iron-graphite melt, the variable volume stone of prismatic blade is furnished with using above-mentioned inner wall Black crucible is combined mode with high speed electromagnetic stirring and iron-graphite melt is stirred;Using variable volume graphite crucible, by subtracting The volume of small graphite crucible, empties all gas on melt top in graphite crucible, and melt and ambient atmos completely every Under conditions of absolutely, i.e., under conditions of no gas source, the stirring of melt is carried out, and then melt volume gas is avoided from root;Utilize High speed electromagnetic stirs, and in the case where no volume gas fetters, iron-graphite melt is produced circumferential high-speed stirred movement, utilizes graphite Prismatic blade on crucible internal walls, constantly moves on to surrounding by internal iron-graphite melt, moves on to the iron-graphite melt on top Lower part, and then prevent the floating of graphite particle and central segregation from moving, so that the graphite particle for efficiently obtaining no volume gas is equal The iron-graphite melt of even distribution.Comprise the following steps:
Step 1, iron-graphite melt is prepared, temperature control is at 1600 DEG C;
Step 2, above-mentioned iron-graphite melt to be poured into graphite crucible 2, the preheating temperature of graphite crucible 2 is 1600 DEG C, by Heating tube 4 in its wall realizes preheating;
Step 3, start and move up and down device, the external screw thread that volume is adjusted to first 10 lower end drops to edge on graphite crucible 2 Internal thread at, closing move up and down device;Start the driving device that volume adjusts first 10, volume is adjusted to first 10 external screw thread Screw in the internal thread of graphite crucible 2, when iron-graphite melt 6 start round platform and infundibulate gas vent 12 along blocking 13 it Between gap, when being overflowed from the lower part of the rectangular tablet of blocking 13, close the driving device that volume adjusts first 10;Tighten clockwise Trip bolt 14, infundibulate gas vent 12 is sealed, and melt is 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-graphite melt 6 at 1600 DEG C, starts high speed electromagnetic agitating device, it is right Iron-graphite 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 Upspring under, iron-graphite melt 6 can be released by opening blocking 7, for using.
Fig. 7 is the water quenching microstructure of the iron-graphite melt of the method for the present invention stirring, and light areas is iron-based body in figure, Darker regions are graphite particle, it is seen then that do not have stomata on iron-based body, graphite particle is evenly distributed in iron-based body.
Embodiment one, the power of high speed electromagnetic agitating device be 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, graphite particle is evenly distributed Iron-graphite melt 6.
Embodiment two, the power of high speed electromagnetic agitating device be 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, graphite particle is evenly distributed Iron-graphite 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, graphite particle is evenly distributed iron-stone Black melt.

Claims (4)

  1. A kind of 1. high-efficiency stirring method of no volume gas iron-graphite melt, it is characterised in that the variation of prismatic blade is furnished with using inner wall Product graphite crucible is combined mode with high speed electromagnetic stirring and iron-graphite 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; Stirred using high speed electromagnetic, in the case where no volume gas fetters, iron-graphite melt is produced circumferential high-speed stirred movement, utilize Prismatic blade on graphite crucible inner wall, constantly by internal iron-graphite melt move on to around, by the iron-graphite melt on top Lower part is moved on to, and then prevents the floating of graphite particle and central segregation from moving, so as to efficiently obtain the graphite of no volume gas The equally distributed iron-graphite melt of grain, comprises the following steps:
    Step 1, iron-graphite melt is prepared, temperature control is at 1600 DEG C;
    Step 2, above-mentioned iron-graphite melt is poured into graphite crucible, the preheating temperature of graphite crucible is 1600 DEG C, by its wall Heating tube realize 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-graphite melt starts along the gap between the round platform and infundibulate gas vent of blocking, the length from blocking When the lower part of square tablet is overflowed, the driving device of volume adjustment head is closed;Trip bolt is tightened clockwise, by infundibulate gas vent Seal, melt is 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-graphite melt at 1600 DEG C, start high speed electromagnetic agitating device, to iron-graphite melt into Row Isothermal stirring, stablizes stirring 2 minutes;
    Step 5, closing high-speed electromagnetic mixing apparatus, unscrews trip bolt counterclockwise, blocking is upspring under the action of the spring, beats Iron-graphite melt can be released by opening blocking, for using.
  2. 2. the high-efficiency stirring method of a kind of no volume gas iron-graphite melt according to claim 1, it is characterised in that at a high speed The rotating speed of electromagnetic mixing apparatus is 900~1200 revs/min.
  3. 3. a kind of Efficient Agitator of no volume gas iron-graphite melt, the device include:High speed electromagnetic agitating device, graphite earthenware 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 with the upper inside wall of graphite crucible 2, the external screw thread that first 10 lower end is adjusted with volume cooperates;Graphite The volume adjustment device of crucible 2 adjusts first 10, blocking 13, trip bolt 14, spring 15 and driving device by volume and forms, and is used for Realize the volume adjustment of graphite crucible 2;Volume adjustment first 10, material is graphite, and its 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 with disk to deflate Mouth 12;The rectangular tablet lower left quarter of blocking 13 carries the round platform for the disk uniform thickness that first 10 are adjusted with volume, and rectangular tablet right part is set There is circular hole, blocking 13 is limited in infundibulate gas vent 12 by right part circular hole by trip bolt 14, 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 it is to jack up blocking 13 that it, which is acted on, When screw-in reduces 2 volume of graphite crucible downwards for volume adjustment first 10, easy to 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 first 10 lower disk, 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 driving volume adjustment first 10 to screw in downwards and screwing 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 can be moved up and down to plate 20 in the guide groove 24 being fixed on stent 28;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 being connected slide plate 21 using mechanical connection manner;Connection slide plate 21 can be fixed on branch Move up and down in guide groove 24 on frame 28, and be connected by buffer spring 22 and connecting screw 23 with guide plate 20, made Volume adjustment first 10 and its driving device move up and down;In bearer connection screw rod 23, guide plate 20, volume adjustment first 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. A kind of 4. Efficient Agitator of no volume gas iron-graphite melt according to claim 3, it is characterised in that iron-stone The lowermost distance d that the upper table of black melt 6 is higher by upwardly 2 internal thread of graphite crucible is 5~10mm.
CN201810010263.9A 2018-01-05 2018-01-05 A kind of high-efficiency stirring method and device of no volume gas iron-graphite melt Withdrawn CN107983245A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116715533A (en) * 2023-08-11 2023-09-08 西南交通大学 Preparation method of carbon fiber reinforced pantograph slide plate for growing silicon carbide nanowire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116715533A (en) * 2023-08-11 2023-09-08 西南交通大学 Preparation method of carbon fiber reinforced pantograph slide plate for growing silicon carbide nanowire

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Application publication date: 20180504