CN2434629Y - Replacable furnace lid central member of d.c. arc furnace - Google Patents
Replacable furnace lid central member of d.c. arc furnace Download PDFInfo
- Publication number
- CN2434629Y CN2434629Y CN 00218834 CN00218834U CN2434629Y CN 2434629 Y CN2434629 Y CN 2434629Y CN 00218834 CN00218834 CN 00218834 CN 00218834 U CN00218834 U CN 00218834U CN 2434629 Y CN2434629 Y CN 2434629Y
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- refractory material
- water cooling
- cooling tube
- metal water
- central component
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Abstract
The utility model relates to a replaceable furnace lid central member of a d. c. arc furnace. The replaceable furnace lid central member of a d. c. arc furnace is characterized in that the upper parts of metallic water-cooling tubes is distributed along the circumference of a turbination, and the lower parts are distributed along a concentric plane; the diameter of a coiled bar at the outermost layer is matched with the size of a fixing frame; the center of the replaceable furnace lid central member of a d. c. arc furnace is provided with a column hole, and the refractory material of the column hole is in a bowler hat shape; the upper part of the refractory material is lightly in a turbination, and the bottom is provided with a high temperature resistant layer covered under the metallic water-cooling tubes; the metallic water-cooling tubes are used as a supporting frame, and are entirely baked into form with the refractory material. The utility model has the advantages of low manufacture cost, good cooling effect, and long service life; overhaul period is extended, and overhaul cost is saved.
Description
The utility model relates to the direct current electric arc furnace technology of metallurgy industry, refers in particular to the bell device that is used for direct current electric arc furnace.
The direct current electric arc furnace bell that at present existing in the world metallurgical works uses is generally by being permanently fixed framework and interchangeable bell central component two parts are formed.The structure of the interchangeable bell central component of often seeing is: there is a cylindrical hole that is used for by Electrode for remelting the fire-proof material member center that slightly is inverted cone shape (suitable for reading bigger, end opening is smaller); The metal water cooling tube along turbination refractory material cylindrical circumferential ring around distribution; Integral body is " turbination of center drilling ", and hole dimension is slightly larger than the electrode size of direct current electric arc furnace in it, and the frame size that is permanently fixed of external diameter and direct current electric arc furnace bell mates.Its weak point is: because the spacing distance of the external diameter of turbination refractory material, internal diameter is bigger, metal water cooling tube along the cylindrical circle distribution is relatively poor to the cooling effect of bell central component, cause high temperature electrode and furnace high-temperature flame serious scaling loss to the bell refractory material, cause that interchangeable bell central component is short service life, the overhaul of the equipments time is short; Simultaneously, the refractory material use amount of the interchangeable bell central component of this structure is bigger, and manufacturing cost is higher.
The purpose of this utility model is to provide a kind of new DC electric arc furnaces interchangeable bell central component, and it is the improvement to existing direct current electric arc furnace interchangeable bell central component, has not only reduced the use amount of refractory material, reduces manufacturing cost; The more important thing is the cooling effect of having strengthened the metal water cooling tube greatly, obviously improved the service life of interchangeable bell central component.
A kind of direct current electric arc furnace interchangeable bell central component of the utility model design, it is made up of refractory material 1, metal water cooling tube 2, it is characterized in that: metal water cooling tube 2 tops are along the turbination circle distribution, metal water cooling tube 2 bottoms are that the concentric plan distributes, and the frame size that is permanently fixed of outermost layer dish circular diameter D and direct current electric arc furnace bell mates.The refractory material 1 that the center has a cylindrical hole (internal diameter size d is slightly larger than electrode size) is " carnival hat shape ", top slightly is the inverted cone shape, tapering 80～88 degree, this tapering has played the support effect to refractory material, D1 (top outside diameter) is slightly larger than D2 (top and bottom junction outside diameter), D2=(0.85～0.95) * D1, D1 (or D2) is too big, 2 pairs of interchangeable bells of metal water cooling tube are poor with the cooling effect of central component, D1 (or D2) is too little, metal water cooling tube 2 easy scaling loss, so D1-d=(0.45～0.65) * (D-d); Refractory material 1 bottom is that thickness h is not less than 30 high temperature resistant refractory masses, cover the below of metal water cooling tube 2 bottoms of concentric plan distribution, can play the pushing off the slag effect on the one hand, be on the one hand, to avoid the interchangeable bell with the metal water cooling tube 2 of central component and be permanently fixed the starting the arc phenomenon that may cause between the bell framework as insulator.Metal water cooling tube 2 tops distribute along turbination refractory material 1 excircle, the bottom distributes along concentric plan, " carnival hat shape " refractory material 1 bottom, according to relevant electromagnetic coupling theory (Biot's one Sa Geer law), electrical conductor produces magnetic field to surrounding space, when powered electrode passes bell with the refractory material 1 center cylindrical hole of central component, metal water cooling tube 2 can produce induction electric energy (E), the size of induction electric energy (E) and metal water cooling tube 2, distance between electrodes (being D1) is inverse ratio, that is to say, D1 (D2) is littler, E is bigger, because D1 (D2) is less than D, it is also bigger that metal water cooling tube 2 can produce induction electric energy (E), if metal water cooling tube 2 contacts with the metal part branch that is permanently fixed framework of direct current electric arc furnace bell, just starting the arc phenomenon might take place, destroy by refractory material 1, the interchangeable bell central component that metal water cooling tube 2 is formed.Be head it off, when the interchangeable bell is made of central component, utilize metal water cooling tube 2 to be support frame and refractory material 1 whole baking molding, integral body is " the carnival hat shape of center drilling ", to strengthen the intensity of central component; And be permanently fixed between framework and the interchangeable bell central component with refractory material 1 at bell and make insulator.The utility model is because D1 is significantly smaller than D, reduced the use amount of refractory material on the one hand, can reduce the manufacturing cost of interchangeable bell with central component, strengthened on the other hand along the cooling effect of 2 pairs of interchangeable bells of metal water cooling tube central component of " carnival hat shape " refractory material excircle distribution, the service life of having improved interchangeable bell central component greatly.
Metal water cooling tube 2 adopts the seamless steel pipe manufacturing, its distribution is labyrinth shape, reason owing to difference in height, metal water cooling tube 2 can not be made around a direction, must inverted plate return, for keeping stressed even, 4～8 of metal water cooling tube 2 turns round and a little is designed to evenly distribute along 360 degree, avoided turning round combine in a little that the stress that causes at a place is excessive, the phenomenon of refractory material expanded by heating, the bad metal water cooled pipeline of support, increased the structural strength of metal water cooling tube 2, improved service life.
3～4 steel construction hooks 3 are evenly distributed on the interchangeable bell with on the central component, are convenient to the interchangeable bell and load and unload with central component.
Compare with prior art, the utlity model has following advantage:
1) reduced the interchangeable bell with the central component refractory material
Use amount has reduced the interchangeable bell with central component
Cost of manufacture.
2) prolonged the maintenance week of interchangeable bell with central component
Phase.
3) improved the use longevity of interchangeable bell with central component
Life.
Description of drawings:
Fig. 1 is a kind of direct current electric arc furnace interchangeable bell with central component device schematic diagram.
Fig. 2 is an interchangeable bell central component metal water cooling tube distribution schematic diagram.
Embodiment:
Certain direct current electric arc furnace electric furnace steel making factory, originally adopt the world's universal direct current electric arc furnace interchangeable bell central component of German import, its structural entity is " turbination of center drilling ", top outside diameter D1=2122, bottom outside diameter D=2030, the internal diameter size of center drilling is slightly larger than the electrode size of direct current electric arc furnace (d=780), on the one hand, 5.8 tons of refractory material consumptions make interchangeable bell central component manufacturing cost higher; On the other hand, because the spacing distance of the external diameter of inverted cone cylindricality refractory material, internal diameter is bigger, cause along turbination refractory material cylindrical circumferential ring relatively poor around the cooling effect of 2 pairs of interchangeable bells of the metal water cooling tube central component that distributes, under the influence of high temperature electrode and furnace flame, the scaling loss of bell refractory material is serious, and anti-material loss reaches 6.46 yuan of/ton steel, and the bell central component is short service life, average 70.3 stoves/part only, the overhaul of the equipments time is short, and influence is produced normally.After using the utility model, interchangeable bell central component integral body is " the carnival hat shape of center drilling ", d=780, top outside diameter D1=1509, top and bottom junction outside diameter D2=1318, bottom outside diameter D=2122,3.1 tons of refractory material consumptions descend 46%, anti-material loss reaches 1.81 yuan of/ton steel, calculate with 300,000 tons of steel of annual production, refractory material can be reduced expenses 139.5 ten thousand yuan every year, greatly reduces the manufacturing cost of interchangeable bell central component; Simultaneously, strengthened along the cooling effect of carnival hat shape refractory material circle distribution water cooling tube to the bell central component, improved the service life about 50% of interchangeable bell central component, average out to 105 stoves/part have prolonged the time between overhauls(TBO), have saved recondition expense.
Claims (3)
1. direct current electric arc furnace interchangeable bell central component, it is made up of refractory material (1), metal water cooling tube (2), it is characterized in that: metal water cooling tube (2) top is along the turbination circle distribution, metal water cooling tube (2) bottom is that the concentric plan distributes, and the frame size that is permanently fixed of outermost layer dish circular diameter D and direct current electric arc furnace bell mates; The center has a cylindrical hole
The refractory material of (internal diameter size d is slightly larger than electrode size)
(1) be " carnival hat shape ", top slightly is the inverted cone shape, tapering 80～88 degree, and D1 (top outside diameter) is slightly larger than D2 (top and bottom junction outside diameter), refractory material
(1) bottom is high temperature resistant refractory masses (thickness h), cover the below of metal water cooling tube (2) bottom of concentric plan distribution, with metal water cooling tube (2) is support frame, and the whole baking molding of refractory material (1) is made the interchangeable bell central component that integral body is " the carnival hat shape of center drilling ".
2. interchangeable bell central component according to claim 1 is characterized in that described refractory material (1) size relationship is: D2=(0.85～0.95) * D1, and D1-d=(0.45～0.65) * (D-d), h is not less than 30mm.
3. interchangeable bell central component according to claim 1 is characterized in that described metal water cooling tube (2) adopts the seamless steel pipe manufacturing, and its distribution is labyrinth shape, evenly distributes 4～8 along 360 degree and turns round a little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00218834 CN2434629Y (en) | 2000-08-15 | 2000-08-15 | Replacable furnace lid central member of d.c. arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00218834 CN2434629Y (en) | 2000-08-15 | 2000-08-15 | Replacable furnace lid central member of d.c. arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2434629Y true CN2434629Y (en) | 2001-06-13 |
Family
ID=33584134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00218834 Expired - Fee Related CN2434629Y (en) | 2000-08-15 | 2000-08-15 | Replacable furnace lid central member of d.c. arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2434629Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762157B (en) * | 2008-10-27 | 2012-11-14 | 中国恩菲工程技术有限公司 | Metallurgical furnace |
| CN108088237A (en) * | 2017-11-27 | 2018-05-29 | 云南冶金新立钛业有限公司 | For the furnace roof centerpiece component for the direct-current airtight electric arc furnace that titanium slag is smelted |
| CN110926214A (en) * | 2019-12-12 | 2020-03-27 | 上海电气上重铸锻有限公司 | Electric furnace cover and material thereof |
-
2000
- 2000-08-15 CN CN 00218834 patent/CN2434629Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762157B (en) * | 2008-10-27 | 2012-11-14 | 中国恩菲工程技术有限公司 | Metallurgical furnace |
| CN108088237A (en) * | 2017-11-27 | 2018-05-29 | 云南冶金新立钛业有限公司 | For the furnace roof centerpiece component for the direct-current airtight electric arc furnace that titanium slag is smelted |
| CN110926214A (en) * | 2019-12-12 | 2020-03-27 | 上海电气上重铸锻有限公司 | Electric furnace cover and material thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20010613 Termination date: 20090915 |