CN201983623U - Cold crucible manufactured by induction melting technology with high suspension capability - Google Patents
Cold crucible manufactured by induction melting technology with high suspension capability Download PDFInfo
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- CN201983623U CN201983623U CN2010206966111U CN201020696611U CN201983623U CN 201983623 U CN201983623 U CN 201983623U CN 2010206966111 U CN2010206966111 U CN 2010206966111U CN 201020696611 U CN201020696611 U CN 201020696611U CN 201983623 U CN201983623 U CN 201983623U
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Abstract
The utility model relates to a cold crucible manufactured by induction melting technology with high suspension capability. The cold crucible comprises a crucible body, wherein a side wall of the crucible body has a valve structure, gaps between the valves penetrate wall thickness of the crucible body, which is characterized in that: there is a uniform or non-uniform gradient between an inner wall of bottom of the crucible body and the horizontal direction, the bottom of the crucible body has a complete valve structure, and the gaps between the valves of the bottom of the crucible body penetrate the wall thickness of the crucible body. The cold crucible in the utility model has the advantages that: heat effect and suspension force of vacuum floating melting are both improved, especially the heat effect and the suspension force within area of the bottom of the crucible.
Description
Technical field
The utility model relates to a kind of cold crucible with Induction Melting Technology of higher suspension ability, belongs to the crucible technique field in the metallurgy.
Background technology
In melting technique, process for vacuum induction smelting belongs to more advanced melting technique, and it has been got rid of, and atmosphere and heating source can prepare the purity high product to the pollution of furnace charge in the fusion process.But crucible material still can produce reaction with furnace charge.In order to prepare to extra high product of purity requirement and the active material of melting, the smelting in suspension technology has appearred in last century end, being called the cold crucible vacuum induction melting technology again---it replaces the ceramic material crucible with red copper crucible, and by electromagnetic field the furnace charge of fusion is in to suspend or accurate suspended state, thereby got rid of the contamination of crucible material fully in fusion process.For preventing that metallic crucible itself is melted, this crucible must water or other coolant cools.
The electromagnetic field that induction coil produces is the basis that melt obtains fuel factor and suspending power, the basis of promptly realizing smelting in suspension.The fuel factor deficiency will cause melting insufficient; Melt will come in contact or half contact with crucible when suspending power is not enough, and its consequence comprises: heat carries in a large number by the sidewall of crucible water that is cooled, and increases considerably energy consumption; The secondth, cause that charge-temperature reduces, melt insufficiently, cause the composition of product and tissue odds even, the quality and the lumber recovery of reduction product; The 3rd, this causes crucible that the pollution of furnace charge is taken place, and makes the principal advantages forfeiture of smelting in suspension; In addition, melt also can cause the crucible scaling loss with the metallic crucible contact, causes accident and increases equipment cost.
The intensity of electromagnetic field equals zero in the metallic crucible of sealing.Must be in order in metallic crucible, to obtain electromagnetic field crucible wall design mix valve structure---reserve some and the slit crucible axis line parallel at crucible wall.Like this, just can there be the electromagnetic field of significant proportion to enter crucible inside (Fig. 1).In order to keep the globality of crucible, cold crucible does not in the past have the slit in its bottom, though the slit is perhaps arranged, the whole thickness of bottom is not run through in the slit.Because electromagnetic field can't penetrate at the bottom of this crucible, the electromagnetic field in the crucible bottom space is very faint, so the furnace charge of bottom is often because of melting insufficient scull (Fig. 1 and Fig. 2) that forms.Also form eddy current at the bottom of the crucible of this structure, make a big chunk of electromagnetic energy be transformed into heat energy, increased energy consumption extraly.
Two of the key problem in technology of crucible design is to produce the power that melt is suspended.High frequency electric in the induction coil produces the alternating magnetic field that is parallel to the crucible axis in crucible, under the effect of alternating magnetic field, the periphery of melt induces the eddy current around the crucible axis, at last, produced the electromagnetic force of direction sensing crucible axis again with the effect of alternating magnetic field around the eddy current of crucible axis.Electromagnetic force makes melt break away from the central shaft compression of crucible wall to crucible, and it is the source of suspending power.On the contrary, the pressure of melt gravity generation is outwards expanded melt.Under the acting in conjunction of these two kinds of power, it is thin that melt just becomes the upper end, the shape that the lower end is thick.
This analysis showed that, the necessary condition that obtains suspending power at the assigned address of melt is in this position electromagnetic field to be arranged, eddy current is arranged, and the power that electromagnetic field and eddy current reciprocation produce has component on the direction perpendicular to the crucible inwall.In cold crucible in the past, the melt of bottom almost can not get suspending power.Its reason comprises: almost do not have electromagnetic field in crucible bottom; The bottom surface of cold crucible is the plane or is the plane substantially.Like this, even if electromagnetic field is arranged, inductive loop also only is distributed in the melt edge, does not have eddy current in inside, bottom surface; Even if electromagnetic field and eddy current are arranged, the direction of the active force that they produce does not have component perpendicular to the crucible axis in the direction perpendicular to planar base surface.
In sum, the design of the cold crucible of traditional vacuum smelting in suspension has some shortcomings, and their most important consequences are that the fuel factor of crucible inner bottom part reduces, and suspending power disappears.
Summary of the invention
The purpose of this utility model is for fuel factor that improves vacuum smelting in suspension and suspending power, and particularly the fuel factor in cold crucible inner bottom part zone and suspending power provide a kind of cold crucible with Induction Melting Technology of higher suspension ability.
The purpose of this utility model is realized by following mode:
The utility model comprises the crucible body, the sidewall of crucible body is a splitted structure, the wall thickness of crucible body is run through in slit between each lobe, it is characterized in that: the inwall of the bottom of crucible body and horizontal direction have even or uneven gradient, splitted structure is completely arranged at the bottom of crucible body, and the thickness of crucible body bottom is run through in the slit between the distinguish of crucible body bottom.
The splitted structure of the bottom of described crucible body comprises: with the crucible body axis be the radiation splitted structure at center, with the splitted structure of the mode distinguish of parallel lines, with the splitted structure of the mode distinguish of curve (line for example crawls), or the splitted structure of distinguish otherwise.
The inwall of the bottom of described crucible body and horizontal direction have even or uneven gradient, that is: the bottom surface of crucible body and horizontal direction have the inclination angle, and the gradient of the bottom interior wall each point of crucible body can be identical, also can be incomplete same.The inwall of the bottom of crucible body can be the conical surface of spherical crown surface, taper seat or other shape, can also be other type to recessed inclined-plane, curved surface or has the face of compound shape.
The bottom surface of crucible body and the inclination angle between horizontal direction are between 0 °～90 °.
On the basis of above-mentioned design, also need to adopt following measures to guarantee the fuel factor and the suspending power of crucible bottom:
Below the crucible body, can install an auxiliary induction circle with crucible body coaxial line in addition.The auxiliary induction circle can be conical solenoid, plane thread pipe or the diameter cylindrical spiral pipe less than the main induction circle, can also be the solenoid of other shape.The frequency of supply of auxiliary induction circle can be different with the frequency of supply of main induction circle, also can be identical.
The inwall of magnetic field at the bottom of near the direction at the bottom of the crucible body approaches parallel crucible body that this class auxiliary induction circle produces so the direction of the active force that it produces with melt bottom surface eddy current is approaching perpendicular to the inwall at the bottom of the crucible body, thereby can produce bigger suspending power.
The auxiliary induction circle also has other advantageous effect, for example strengthens the electromagnetic field intensity in crucible body inner bottom part district, improves the temperature of melt bottom; Leave in crucible body bottom under the situation of the cause for gossip row uphill casting of making a bet, the auxiliary induction circle is controlled geat in addition and is opened and closed, effects such as control uphill casting melt flow.
The secondth, the eddy current that avoid structural member to form absorbs electromagnetic field energy:
If electromagnetic field is stopped, absorbs by crucible body, water jacket and other structural member and forms eddy current, will seriously undermine the effective field that acts on furnace charge.For fear of this class detrimental effect, the utility model has been taked following technical measures:
1) from top to bottom by the crucible body of distinguish need be by assembling the crucible that the crucible lobe just can obtain integral body fully.But, must guarantee to maintain suitable gap between the crucible lobe after the assembling, prevent that the crucible lobe is in contact with one another the formation closed-loop path.Proper gap is 0.1～0.6mm, preferably 0.3～0.5mm.In order to guarantee the uniformity in gap, be preferably in the insulating materials that serves as a contrast between the crucible lobe with equal thickness, as corundum sheet, quartz plate, teflon plate, epoxy resin etc.
2) in the sport technique segment of assembling crucible, must prevent that assembled material from forming closed galvanic circle, prevent that assembled material from connecting into closed galvanic circle with the crucible lobe.The technical measures that satisfy these requirements comprise:
A. with insulating materials the crucible lobe is packaged into whole crucible, for example uses Al
2O
3, SiO
2, ceramic powders such as MgO fills fixingly, also can carry out embedding with curable materials such as epoxy resin;
B. use insulating materials assembly parts (08) assembly unit crucible lobes such as corundum, quartz, epoxy resin;
C. use metal material assembly parts assembly unit crucible lobe.The design of metal fitting should be a principle not form closed conductive channel, as adopting the assembly parts of strip, little strip, or adopts the becket that cuts off mouthful is arranged, and preferably serves as a contrast with felt pad between assembly parts and the crucible lobe that is assembled.
3) cooling fluid of cooling crucible generally will insert the coolant duct of body of heater outside again by near the water jacket the crucible body, and water jacket is generally the cavity of disc or annular.Design irrational water jacket and can reduce electromagnetic field energy efficient significantly.Its reason comprises: water jacket blocks the passage of the magnetic line of force, reduces the energy of electromagnetic field that enters crucible; Water jacket constitutes closed conductive channel, and it can produce very big inductive loop, the strong absorption electromagnetic field energy.
The measure that reduces the water jacket detrimental effect comprises:
A. the size of water jacket is as far as possible little, will avoid becoming the loop coaxial with induction coil as far as possible away from induction coil;
B. when water jacket is ring-shaped cavity, must ring cutting be broken, two fractures are welded respectively extremely, and adopt the insulating properties between assurance such as the way of the filling insulating barrier fracture in certain position of ring.
The beneficial effects of the utility model are: improved the fuel factor and the suspending power of vacuum smelting in suspension, the particularly fuel factor in crucible inner bottom part zone and suspending power.Its way comprises: with complete distinguish at the bottom of the crucible, form electromagnetic field and enter the passage of crucible bottom; Designing gradient crucible bottom surface makes the melt of bottom can obtain suspending power; Induction coil is set below crucible, strengthens the electromagnetic field and the suspending power of melt bottom; By the package technique of improving the crucible lobe and the method for designing of improving water jacket, prevent that structure members such as crucible, water jacket from stopping, absorbing electromagnetic field and producing eddy current because of forming closed galvanic circle, thereby get rid of extra energy consumption.
Description of drawings
Fig. 1 is the structural representation of the cold crucible of embodiment one---have splitted structure completely at the bottom of the crucible; (annotate: the induction coil that only drawn on the crucible right side does not show cooling pipe and water jacket);
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is in the cold crucible of embodiment one, and magnetic field B acts on the schematic diagram of the inductive loop I generation directed force F of melt bottom surface;
Fig. 4 is the bottom enlarged drawing of Fig. 3;
Fig. 5 is the exploded view of the stressed F in melt bottom surface;
Fig. 6 is the structural representation of the cold crucible of embodiment two---(03) has complete splitted structure at the bottom of the crucible, bottom device auxiliary induction circle (08);
Fig. 7 is the vertical view of Fig. 6;
Fig. 8 is in the cold crucible of embodiment two, and the magnetic field that the cold crucible of conical auxiliary induction circle is installed acts on the schematic diagram of the eddy current generation active force of melt bottom surface;
Fig. 9 is the bottom enlarged drawing of Fig. 8;
Figure 10 is in the cold crucible of embodiment two, the bottom enlarged drawing of the cold crucible of mounting plane auxiliary induction circle;
Figure 11 is in the cold crucible of embodiment two, and the bottom enlarged drawing of the cold crucible of cylinder auxiliary induction circle is installed;
Figure 12 is that the cold crucible of embodiment three is assembled the structure of crucible lobe and the schematic diagram of water jacket design;
(annotating:, removed several crucible lobes of front) in order to show crucible inside.
In above each figure, 01. main induction circle, 02. sidewall of crucible, 03. at the bottom of the crucible, 04. the furnace charge melt, 05. furnace charge scull, 06. auxiliary induction circle, 07. geat under the crucible, 08. assembly parts, 09. felt pad, 10. water jacket, 11. lead to the cooling house steward of body of heater outside, 12. lead to the cooling duct (only having represented the minority conduit the figure) of water jacket from crucible.
In above each figure, A is the crucible axis, B is the magnetic line of force of electromagnetic field, and C is the slit between the crucible distinguish, and E is the not seamless part of distinguish of crucible bottom, D is the direction line of inner surface at the bottom of the crucible, W is the direction line of horizontal plane, and α is the angle of inner surface and horizontal plane at the bottom of the crucible, and q is that power F is at the component perpendicular to melt bottom surface direction, u be F at the component that is parallel to melt bottom surface direction, M is the cut-out mouth of ring-type water jacket or ring-type assembly parts.
In the accompanying drawings, I is the eddy current of bath surface, and F is that main induction circle magnetic field acts on the electromagnetic force that the melt eddy current produces, and P is the pressure that melt gravity produces, and F ' is that auxiliary induction circle magnetic field acts on the electromagnetic force that the melt eddy current produces.
The specific embodiment
The utility model comprises the crucible body, the sidewall 02 of crucible body is a splitted structure, the wall thickness of crucible body is run through in slit between each lobe, the inwall of the bottom 03 of crucible body and horizontal direction have even or uneven gradient, splitted structure is completely arranged at the bottom 03 of crucible body, and the thickness of crucible body bottom is run through in the slit between the distinguish of crucible body bottom 03.
Embodiment one:
With reference to accompanying drawing 3,4,5, in this example, the crucible body sidewall of red copper cold crucible is a cylindrical shape, and the inwall of crucible body bottom is a hemisphere face.This crucible body is the sidewall distinguish not only, and also complete distinguish at the bottom of the crucible body, and the thickness at the bottom of sidewall of crucible and the crucible is run through in the gap between the distinguish, isolates with quartz plate between the crucible lobe, and the gap between lobe is 0.4mm.
The electromagnetism field energy that this structure of cold crucible produces induction coil (01) runs through the entire inner space of crucible smoothly by (03) at the bottom of the crucible, the furnace charge that comprises crucible bottom in the crucible can all be heated and fusing fully.
Fig. 3 and Fig. 4 have shown the force analysis of furnace charge in the crucible of this structure: because the inwall of (03) is gradient at the bottom of the crucible, so the electromagnetic field B that induction coil (01) produces in crucible can induce eddy current I in the bottom surface of melt (04).Magnetic field B interacts with eddy current I, has produced the electromagnetic force F that direction is pointed to the crucible axis for the melt bottom surface, and F component q of inwall at the bottom of perpendicular to crucible can overcome the pressure P of melt, makes the inwall at the bottom of the melt bottom surface breaks away from crucible.
Embodiment two:
With reference to accompanying drawing, in this example, though the crucible body sidewall of red copper cold crucible still is a cylindrical shape, the inside and outside surface of red copper crucible body bottom all is a taper seat, and coning angle is 120 ° (crucible body bottom surface is 30 ° for the inclination angle of horizontal plane).Have the following geat of diameter 2cm at the tip of crucible body bottom.
In this embodiment, the distinguish situation at the bottom of crucible body wall and the crucible body is identical with embodiment one, so main induction circle (01) is also similar to the situation of embodiment one to the situation that the melt bottom surface produces suspending power.
Different with embodiment one, present embodiment has also been installed conical auxiliary induction circle (06) below crucible except main induction circle (01).Inwall in crucible body bottom, the direction of the magnetic line of force B that the auxiliary induction circle produces approach that inwall is parallel therewith.Like this, B with interact the directed force F that is produced around the inductive loop I of crucible axis A along the melt bottom surface ' its direction just approaches the inwall at the bottom of the vertical crucible, thereby produced significant more suspension effect.
Embodiment three:
With reference to accompanying drawing, this crucible body has the circular section, and red copper is made.The crucible body sidewall divides 16 lobes, internal diameter R=120mm.Crucible body bottom is divided into 8 lobes by radiation direction, and following geat (07) is arranged, taper barrel, and coning angle is 120 °, it directly is contained in the lower surface of sidewall of crucible.Overall height H=the 250mm of crucible.
The upper surface of crucible body sidewall is with red copper ring plate (08) assembly unit, served as a contrast felt pad (09) between the surface of it and crucible body.In order to cut off the eddy current loop, red copper ring (08) processes fracture M.
Stainless steel water jacket (10) is an annular housing, is positioned at the distance H=100mm of crucible below from the crucible lower surface.In order to cut off the eddy current loop, water jacket has been made a fracture M.
Claims (7)
1. cold crucible with Induction Melting Technology of higher suspension ability, comprise the crucible body, the sidewall of crucible body is a splitted structure, the wall thickness of crucible body is run through in slit between each lobe, it is characterized in that: the inwall of the bottom of crucible body and horizontal direction have even or uneven gradient, splitted structure is completely arranged at the bottom of crucible body, and the thickness of crucible body bottom is run through in the slit between the distinguish of crucible body bottom.
2. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 1 is characterized in that: the bottom surface of crucible body and the inclination angle between horizontal direction are between 0 °～90 °.
3. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 1 is characterized in that: auxiliary induction circle with crucible body coaxial line of installing below the crucible body.
4. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 1 is characterized in that: the gap that maintains 0.1～0.6mm between the crucible lobe of crucible body.
5. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 4 is characterized in that: with insulating materials the crucible lobe is packaged into whole crucible.
6. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 4 is characterized in that: with insulating materials assembly parts assembly unit crucible lobe.
7. the cold crucible with Induction Melting Technology of higher suspension ability according to claim 4 is characterized in that: with metal material assembly parts assembly unit crucible lobe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206966111U CN201983623U (en) | 2010-12-22 | 2010-12-22 | Cold crucible manufactured by induction melting technology with high suspension capability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206966111U CN201983623U (en) | 2010-12-22 | 2010-12-22 | Cold crucible manufactured by induction melting technology with high suspension capability |
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|---|---|
| CN201983623U true CN201983623U (en) | 2011-09-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276980A (en) * | 2014-05-28 | 2016-01-27 | 国核华清（北京）核电技术研发中心有限公司 | Ceramic crucible |
| CN106807907A (en) * | 2016-12-23 | 2017-06-09 | 李蔚晶 | The cold crucible vacuum induction melting device for directionally solidifying of low radial symmetry gradient |
| CN106839762A (en) * | 2016-12-23 | 2017-06-13 | 李蔚晶 | The Cold crucible induction melting method of superelevation smelting temperature |
| CN107030269A (en) * | 2017-05-22 | 2017-08-11 | 宋佳 | A kind of high vacuum apparatus of metal molding and its application method |
| CN111412760A (en) * | 2020-04-01 | 2020-07-14 | 深圳市赛迈特悬浮冶金科技有限公司 | Method for improving molten pool uniformity by argon blowing technology in suspension smelting technology |
| CN112393588A (en) * | 2020-10-26 | 2021-02-23 | 宝鸡华煜鼎尊材料技术有限公司 | Induction smelting cold crucible with full suspension and strong stirring capacity |
-
2010
- 2010-12-22 CN CN2010206966111U patent/CN201983623U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276980A (en) * | 2014-05-28 | 2016-01-27 | 国核华清（北京）核电技术研发中心有限公司 | Ceramic crucible |
| CN105276980B (en) * | 2014-05-28 | 2017-11-03 | 国核华清（北京）核电技术研发中心有限公司 | ceramic crucible |
| CN106807907A (en) * | 2016-12-23 | 2017-06-09 | 李蔚晶 | The cold crucible vacuum induction melting device for directionally solidifying of low radial symmetry gradient |
| CN106839762A (en) * | 2016-12-23 | 2017-06-13 | 李蔚晶 | The Cold crucible induction melting method of superelevation smelting temperature |
| CN106807907B (en) * | 2016-12-23 | 2021-04-20 | 李蔚晶 | Low radial temperature gradient cold crucible vacuum induction melting directional solidification device |
| CN107030269A (en) * | 2017-05-22 | 2017-08-11 | 宋佳 | A kind of high vacuum apparatus of metal molding and its application method |
| CN111412760A (en) * | 2020-04-01 | 2020-07-14 | 深圳市赛迈特悬浮冶金科技有限公司 | Method for improving molten pool uniformity by argon blowing technology in suspension smelting technology |
| CN112393588A (en) * | 2020-10-26 | 2021-02-23 | 宝鸡华煜鼎尊材料技术有限公司 | Induction smelting cold crucible with full suspension and strong stirring capacity |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN SUMMIT LEVITATION METALLURGICAL SCIENCE A Effective date: 20120504 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 014030 BAOTOU, INNER MONGOLIA AUTONOMOUS REGION TO: 518000 SHENZHEN, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120504 Address after: 518000 Guangdong city of Shenzhen province Nanshan District Xili liuxiandong outside plant No. 20 first floor 1-5 Patentee after: Shenzhen city Saimaite suspended Metallurgy Technology Co. Ltd. Address before: 014030, No. 50, 5 Kangle District, Qingshan District, the Inner Mongolia Autonomous Region, Baotou Patentee before: Li Bei |
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| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
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| CX01 | Expiry of patent term |