CN2317452Y - Vacuum high temp. retort furnace by dc control of crucible resistance - Google Patents
Vacuum high temp. retort furnace by dc control of crucible resistance Download PDFInfo
- Publication number
- CN2317452Y CN2317452Y CN 97231735 CN97231735U CN2317452Y CN 2317452 Y CN2317452 Y CN 2317452Y CN 97231735 CN97231735 CN 97231735 CN 97231735 U CN97231735 U CN 97231735U CN 2317452 Y CN2317452 Y CN 2317452Y
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- graphite
- heater
- crucible
- utility
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- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The utility model provides a vacuum high temperature sintering furnace by dc control of crucible resistance, which is a composite magnesium oxide lining. A furnace body is provided with a vacuum seal structure and two graphite electrodes; a dc control single-phase alternative power supply is connected with the outer end of the electrode; a cage-shaped heating device is connected with the inner end of the electrode and mainly comprises graphite sticks. The utility model is characterized in that the high sintering furnace temperature of 2200DEG. C can guarantee the quality of the crucible sintering, the life of furnace body is long, the utilization rate of the induction furnace is raised and the material consumption is reduced, and the utility model can be heated according to reasonable heating regulation. The utility model is used for sintering the high refractoriness precast crucible.
Description
The utility model relates to the roasting apparatus technical field of roasting crucible.
The various electric induction furnaces metallurgical at present, that casting industry uses, sintering temperature is low, and lining durability is low, generally about 200 heats.Therefore these type of furnaces all are furnished with 2 bodies of heater, and one is used to fire furnace lining, and one is used for smelting.This has not only strengthened equipment investment, has reduced usage ratio of equipment, and energy-consuming consumptive material is many, inefficiency, and the furnace lining that is fired into (crucible) is of poor quality, and service life is short.
The purpose of this utility model provides a kind of special DC control crucible resistance vacuum sintering furnace, and its sintering temperature height easily guarantees sintering quality, and converter life is long, and materials saving has improved the utilization rate and the operating efficiency of electric induction furnace.
The utility model is achieved in that a kind of DC control crucible resistance vacuum high-temperature sintering stove, it is characterized in that having body of heater, bell, the furnace lining of body of heater innermost layer is the compound material of magnesia, the body of heater skin is the fire-resistant heat insulating material layer, be provided with vacuum seal formula structure between body of heater and bell, bell is provided with pipeline and vavuum pump is communicated with, body of heater is provided with 2 root graphite electrode rods, its outer end and DC control frequency tripling single-phase transformer secondary linking to each other of power supply, be provided with cooling jacket near the outer end, the inner end links to each other with the cage type electro-heat equipment, the structure of cage type electro-heat equipment is: vertical graphite rod of a week is arranged, link to each other by the graphite connector between every adjacent two graphite rods, constitute a curved snakelike electro-heat equipment.
Available graphite connector connects by graphite bolt, nut between above-mentioned two every adjacent graphite rods, to guarantee higher sintering temperature, intensity and service life.Connector can be graphite cake or rod, also can directly be closely connected with graphite rod.
Above-mentioned DC control blow-up variable power source is preferably 120KVA DC control type frequency tripling single phase poaer supply, wherein secondary the and graphite of frequency tripling transformer extremely rod links to each other.
The utility model has the advantages that: the sintering temperature height is easy to guarantee the crucible sintering quality; Converter life is long; Materials saving can improve the utilization rate of equipment and installations of electric induction furnace; Can heat according to rational heating schedule.It is a kind of special equipment that is used for the high refractoriness crucible of sintering.
Be described further below in conjunction with embodiment and accompanying drawing, but not as to qualification of the present utility model.
Fig. 1 is the structural representation of an embodiment.
Fig. 2 is the expansion schematic diagram of its cage type electro-heat equipment.
Among Fig. 1,1 is bell, and 2 is vavuum pump, 3 is the compound material of magnesia, and 4 are the sealing layer of sand, and 5 is set pin sleeve, 6 is insulation material, and 7 is the compound material blood clam of magnesia snail seat, and 8,9 is the graphite electrode rod, 10 is cooling jacket, and 11 is graphite rod, many circle distribution, 12 for the graphite folder, and graphite electrode is connected clamping with graphite rod, and 13 is the graphite bolt, 14 is that the graphite nut connects conduction with adjacent graphite rod, constitutes curved snakelike electro-heat equipment.
Fig. 2, the same Fig. 1 of label.
The temperature of this sintering furnace can reach 2200 ℃, and can be according to rational heating crucible heating curves heating, 120KVA DC control type frequency tripling single-phase transformer is as power supply, power supply is secondary, and to record the output maximum voltage be 250 volts, maximum current is 400 peaces, and the patent No. that power supply adopts me to apply for is the ZL94216295.1 patented technology, adopts Mg and Al2O3 preparation, sintered aluminium magnesia spinel system gives the system crucible, and crucible life generally reaches more than 800 heats.
Claims (2)
1, a kind of DC control crucible resistance vacuum high-temperature sintering stove, it is characterized in that having body of heater, bell, the furnace lining of body of heater innermost layer is the compound material of magnesia, the body of heater skin is the fire-resistant heat insulating material layer, be provided with vacuum seal formula structure between body of heater and bell, bell is provided with pipeline and vavuum pump is communicated with, body of heater is provided with 2 root graphite electrode rods, its outer end and DC control frequency tripling single-phase transformer secondary linking to each other of power supply, be provided with cooling jacket near the outer end, the inner end links to each other with the cage type electro-heat equipment, and the structure of cage type electro-heat equipment is: vertical graphite rod of a week is arranged, link to each other by the graphite connector between every adjacent two graphite rods, constitute a curved snakelike electro-heat equipment.
2, high temperature sintering furnace according to claim 1 is characterized in that the graphite connector between described adjacent two graphite rods connects by graphite bolt, nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231735 CN2317452Y (en) | 1997-12-26 | 1997-12-26 | Vacuum high temp. retort furnace by dc control of crucible resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231735 CN2317452Y (en) | 1997-12-26 | 1997-12-26 | Vacuum high temp. retort furnace by dc control of crucible resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2317452Y true CN2317452Y (en) | 1999-05-05 |
Family
ID=33943874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97231735 Expired - Fee Related CN2317452Y (en) | 1997-12-26 | 1997-12-26 | Vacuum high temp. retort furnace by dc control of crucible resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2317452Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968308A (en) * | 2010-11-24 | 2011-02-09 | 中国矿业大学 | Crucible-lifting sintering furnace |
-
1997
- 1997-12-26 CN CN 97231735 patent/CN2317452Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968308A (en) * | 2010-11-24 | 2011-02-09 | 中国矿业大学 | Crucible-lifting sintering furnace |
| CN101968308B (en) * | 2010-11-24 | 2012-09-05 | 中国矿业大学 | Crucible-lifting sintering furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |