CN110986571A - Direct-current electric arc furnace for tempering metallurgical waste residues - Google Patents
Direct-current electric arc furnace for tempering metallurgical waste residues Download PDFInfo
- Publication number
- CN110986571A CN110986571A CN201911238148.8A CN201911238148A CN110986571A CN 110986571 A CN110986571 A CN 110986571A CN 201911238148 A CN201911238148 A CN 201911238148A CN 110986571 A CN110986571 A CN 110986571A
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- Prior art keywords
- furnace
- electric arc
- furnace body
- slag
- arc furnace
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
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- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
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- 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
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
- F27D25/001—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag comprising breaking tools, e.g. hammers, drills, scrapers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a direct current arc furnace for tempering metallurgical waste residues, which comprises a furnace body, a furnace cover and an upper electrode, wherein the furnace cover is arranged at the opening part of the furnace body; a feed inlet is formed in one side of the furnace body, a slag outlet is formed in the other side of the furnace body, and the whole slag outlet is made of a graphite sleeve; the bottom of the furnace body is provided with a graphite base, the graphite base is connected with the inner side end of a graphite sleeve of the slag outlet to form an integrated bottom electrode, and the inner side end of the graphite sleeve is connected with a power supply by a metal buckle to play a role of a positive electrode. Like this, through moving power and bottom electrode interface to slag notch department, reduced because of improper to the operation of stove bottom positive electrode interface and to the influence in electric arc furnace life-span, can realize the operation of the no water-cooling system in electric arc furnace bottom simultaneously, improve equipment operation security performance.
Description
Technical Field
The invention belongs to the technical field of smelting equipment, and particularly relates to a direct current electric arc furnace for tempering metallurgical waste residues.
Background
The direct current electric arc furnace for tempering metallurgical waste slag is smelting equipment using direct current as energy source for metallurgical waste slag and multi-source solid waste, and its basic function is to utilize high-temperature electric arc produced by the action between electrodes to contact furnace wall so as to attain the goal of heating material in furnace. The following problems are most easily caused in the existing direct current electric arc furnace: firstly, the sealing performance of the jack of the furnace cover electrode is poor, and a large amount of smoke and dust are generated in the smelting process, so that the environmental pollution is caused; secondly, the water cooling system at the bottom of the furnace ensures the normal operation of smelting, and a large amount of heat can be taken away in the smelting process, so that energy loss is caused; thirdly, a positive electrode interface is positioned at the bottom of the furnace, and if the interface is unreasonable to operate, the interface can be damaged by high temperature to influence the service life of the whole equipment; fourthly, because the power supply system is direct current, electric arcs generated by electrodes of the direct current electric arc furnace do not pass through zero crossing points, so that dangerous accidents can be generated when equipment is abnormal and the electric arcs cannot be cut off in time, the furnace bottom can be burnt seriously, and high-temperature molten materials are in direct contact with cooling water to generate dangers such as explosion.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a direct current electric arc furnace for tempering metallurgical waste residues. The risk of explosion caused by burning through of the bottom of the electric arc furnace is solved.
The invention is realized by the following technical scheme:
a direct current arc furnace for tempering metallurgical waste residues comprises a furnace body, a furnace cover and an upper electrode, wherein the furnace cover is arranged at the opening of the furnace body, and the furnace cover is installed and fixed by utilizing a positioner around the opening of the furnace body;
an electrode jack is arranged at the central part of the furnace cover, the upper electrode extends into the furnace body from the electrode jack, and a furnace cover sealing material is arranged around the electrode jack of the furnace cover;
a feed inlet is formed in one side of the furnace body, a slag outlet is formed in the other side of the furnace body, and the whole slag outlet is made of a graphite sleeve;
the bottom of the furnace body is provided with a graphite base, the graphite base is connected with the inner side end of a graphite sleeve of the slag outlet to form an integrated bottom electrode, and the inner side end of the graphite sleeve is connected with a power supply by a metal buckle to play a role of a positive electrode.
In the technical scheme, the furnace cover sealing material around the electrode insertion hole is made of high-temperature light-weight refractory material, the hole diameter of the furnace cover sealing material is equivalent to the outer diameter of the upper electrode, and a large amount of smoke dust is prevented from overflowing from the periphery of the electrode insertion hole and losing heat.
In the technical scheme, the inner wall of the furnace body is embedded with high-temperature refractory materials.
According to the technical scheme, the high-temperature refractory material inlaid in the inner wall of the furnace body is made of the carbon refractory ramming material, slag is not adhered in the smelting process of metallurgical waste slag, and the anti-scouring performance is excellent.
In the technical scheme, the heat insulation material is arranged below the graphite base, so that a large amount of heat loss is avoided, and energy conservation and consumption reduction are realized.
In the technical scheme, a fixing bracket and a bolt which are matched with the motor are arranged below the slag outlet.
In the technical scheme, the slag outlet is provided with the cover plate, the middle part of the cover plate is provided with the hole, and the flow speed of slag discharge is controlled by changing the size of the hole.
In the technical scheme, the metal buckle is sleeved on the exposed furnace body part of the graphite sleeve.
The invention has the advantages and beneficial effects that:
1. the upper electrode is sealed by using the light high-temperature resistant material in the middle of the furnace cover, so that the discharge of smoke dust and pollutants in the furnace is reduced, and environment-friendly smelting is realized.
2. The invention moves the interface of the power supply and the bottom electrode to the graphite sleeve at the slag outlet, reduces the influence on the service life of the electric arc furnace caused by improper operation of the interface of the positive electrode at the bottom of the electric arc furnace, and prolongs the service life of the electric arc furnace.
3. The slag graphite sleeve and the furnace bottom graphite base are connected to form the bottom electrode, the water cooling system is removed, and the risk of explosion caused by burning-through of the furnace bottom of the electric arc furnace is essentially solved.
4. The furnace bottom is paved by adopting heat insulation materials and graphite materials, so that the heat insulation performance of the electric arc furnace is enhanced, the melting efficiency is improved, and the energy consumption is saved.
5. The slag hole and the furnace bottom are both provided with graphite materials, so that the function of a positive electrode is realized, the conductivity is enhanced, and the time wasted by cleaning sticky slag and the damage to the slag hole are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a dc electric arc furnace according to the present invention.
Fig. 2 is a schematic cross-sectional view of a dc arc furnace according to the present invention.
In the figure: 1. a furnace cover; 2. a furnace body; 3. a positioner; 4. a metal buckle; 5. a bolt; 6. fixing a bracket; 21. an upper electrode; 22. sealing the furnace cover; 23. a feed inlet; 24. a graphite sleeve; 25. a slag outlet; 26, a thermal insulation material; 27. a graphite base; 28. a high temperature refractory material.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Referring to the attached drawings 1 and 2, the direct current arc furnace for tempering the metallurgical waste residue comprises a furnace body 2, a furnace cover 1 and an upper electrode 21, wherein the furnace cover 1 is arranged at the opening part of the furnace body 2 in a covering manner, and the furnace cover 1 is fixedly installed by utilizing a positioner 3 around the opening part of the furnace body.
An electrode jack is arranged at the central part of the furnace cover 1, the upper electrode 21 extends into the furnace body 2 from the upper electrode jack, and a furnace cover sealing material 22 is arranged around the electrode jack of the furnace cover 1; further, the furnace lid sealing material 22 around the electrode insertion hole is made of a high-temperature lightweight refractory material, and the hole diameter thereof is equivalent to the outer diameter of the upper electrode 21, thereby preventing a large amount of smoke from escaping from around the electrode insertion hole and heat loss.
The inner wall of the furnace body 2 is embedded with a high-temperature refractory material 28; furthermore, the high-temperature refractory material 28 embedded in the inner wall of the furnace body 2 is made of a carbon refractory ramming material, so that the metallurgical waste slag is not adhered in the smelting process, and the anti-scouring performance is excellent.
One side of furnace body 2 is equipped with feed inlet 23, and the opposite side of furnace body 2 is equipped with the slag notch 25 that has graphite sleeve 24, and slag notch 25 wholly adopts graphite sleeve 24 to make and forms, is located the center of electric arc furnace, utilizes graphite and metallurgical slag contact angle big, and the poor characteristic of wettability can guarantee that the slag notch is clean, saves clearance and maintenance cost.
The bottom of the furnace body 2 is provided with a graphite base 27, the graphite base 27 is connected with the inner side end of the graphite sleeve 24 of the slag outlet 25 to form an integrated bottom electrode, and the inner side end of the graphite sleeve 24 is connected with a power supply by a metal buckle 4 to play a role of a positive electrode. Therefore, the power supply and the bottom electrode interface are moved to the slag outlet 25, the influence on the service life of the electric arc furnace due to improper operation of the furnace bottom positive electrode interface is reduced, the operation of a water-cooling-free system at the bottom of the electric arc furnace can be realized, and the operation safety performance of equipment is improved.
Furthermore, a heat insulating material 26 is arranged below the graphite base 27, so that a large amount of heat loss is avoided, and energy conservation and consumption reduction are realized.
Further, a fixed bracket 6 and a bolt 5 which are matched with the motor are arranged below the slag outlet 25.
Furthermore, a cover plate is arranged at the slag outlet 25, a hole is formed in the middle of the cover plate, and the flow speed of slag discharge is controlled by changing the size of the hole.
Further, the metal clip 4 is fitted over the exposed furnace body portion of the graphite sleeve 24.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (8)
1. The utility model provides a direct current electric arc furnace for metallurgical waste slag quenching and tempering which characterized in that: the furnace cover is arranged at the opening of the furnace body and is installed and fixed by utilizing a positioner around the opening of the furnace body;
an electrode jack is arranged at the central part of the furnace cover, the upper electrode extends into the furnace body from the electrode jack, and a furnace cover sealing material is arranged around the electrode jack of the furnace cover;
a feed inlet is formed in one side of the furnace body, a slag outlet is formed in the other side of the furnace body, and the whole slag outlet is made of a graphite sleeve;
the bottom of the furnace body is provided with a graphite base, the graphite base is connected with the inner side end of a graphite sleeve of the slag outlet to form an integrated bottom electrode, and the inner side end of the graphite sleeve is connected with a power supply by a metal buckle to play a role of a positive electrode.
2. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: the furnace cover sealing material around the electrode jack is made of high-temperature light refractory material, and the aperture of the furnace cover sealing material is equivalent to the outer diameter of the upper electrode.
3. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: the inner wall of the furnace body is embedded with high-temperature refractory materials.
4. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: the high-temperature refractory material inlaid on the inner wall of the furnace body is made of carbon refractory ramming material.
5. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: and a heat insulation material is arranged below the graphite base.
6. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: and a fixed bracket and a bolt which are matched with the motor are arranged below the slag outlet.
7. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: the slag hole is provided with a cover plate, the middle part of the cover plate is provided with a hole, and the flow speed of slag is controlled by changing the size of the hole.
8. The dc electric arc furnace for metallurgical slag conditioning of claim 1, wherein: the metal buckle is sleeved on the part of the graphite sleeve exposed out of the furnace body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911238148.8A CN110986571A (en) | 2019-12-06 | 2019-12-06 | Direct-current electric arc furnace for tempering metallurgical waste residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911238148.8A CN110986571A (en) | 2019-12-06 | 2019-12-06 | Direct-current electric arc furnace for tempering metallurgical waste residues |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110986571A true CN110986571A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911238148.8A Pending CN110986571A (en) | 2019-12-06 | 2019-12-06 | Direct-current electric arc furnace for tempering metallurgical waste residues |
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| CN (1) | CN110986571A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2251124Y (en) * | 1996-06-20 | 1997-04-02 | 冶金工业部钢铁研究总院 | Three-electrode dc ore-smelting electric furnace |
| CN1908518A (en) * | 2006-08-21 | 2007-02-07 | 东北大学 | Electric arc molten processing system and method for processing rubbish combustion ash |
| CN102748953A (en) * | 2012-07-23 | 2012-10-24 | 浠水县奎拓铸造材料有限公司 | Graphite electrode ore-smelting furnace tap hole and installation and use method thereof |
| CN204594221U (en) * | 2015-02-11 | 2015-08-26 | 佟玉鹏 | A kind of mineral hot furnace of short route high-titanium slag smelting |
| CN105004177A (en) * | 2015-07-03 | 2015-10-28 | 河南东风新研材科技有限公司 | Single-electrode DC corundum smelting equipment |
| CN107218800A (en) * | 2017-06-20 | 2017-09-29 | 许玉蕊 | A kind of direct current electric arc furnace |
| CN208398629U (en) * | 2018-05-07 | 2019-01-18 | 洛阳利尔中晶光伏材料有限公司 | A kind of refractory material smelting melting electric arc furnaces |
-
2019
- 2019-12-06 CN CN201911238148.8A patent/CN110986571A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2251124Y (en) * | 1996-06-20 | 1997-04-02 | 冶金工业部钢铁研究总院 | Three-electrode dc ore-smelting electric furnace |
| CN1908518A (en) * | 2006-08-21 | 2007-02-07 | 东北大学 | Electric arc molten processing system and method for processing rubbish combustion ash |
| CN102748953A (en) * | 2012-07-23 | 2012-10-24 | 浠水县奎拓铸造材料有限公司 | Graphite electrode ore-smelting furnace tap hole and installation and use method thereof |
| CN204594221U (en) * | 2015-02-11 | 2015-08-26 | 佟玉鹏 | A kind of mineral hot furnace of short route high-titanium slag smelting |
| CN105004177A (en) * | 2015-07-03 | 2015-10-28 | 河南东风新研材科技有限公司 | Single-electrode DC corundum smelting equipment |
| CN107218800A (en) * | 2017-06-20 | 2017-09-29 | 许玉蕊 | A kind of direct current electric arc furnace |
| CN208398629U (en) * | 2018-05-07 | 2019-01-18 | 洛阳利尔中晶光伏材料有限公司 | A kind of refractory material smelting melting electric arc furnaces |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200410 |