CN1048750A - Arc controlled magnetic mirror direct current electric arc furnace - Google Patents
Arc controlled magnetic mirror direct current electric arc furnace Download PDFInfo
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- CN1048750A CN1048750A CN 89104794 CN89104794A CN1048750A CN 1048750 A CN1048750 A CN 1048750A CN 89104794 CN89104794 CN 89104794 CN 89104794 A CN89104794 A CN 89104794A CN 1048750 A CN1048750 A CN 1048750A
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Abstract
The invention is the direct current electric arc furnace that is used for metal smelting, alloy and all electro-conductive materials.Be characterized on common electric arc furnace body of heater, having set up control arc device.The blow of electric arc can be controlled, thereby the scheme of two electrodes power supply can be adopted.Control arc device comprises a magnetic mirror coil by the adjusting pressuring dc power power supply around body of heater.With three electro-magnet that are mutually 120 ° that are positioned at place, plane, arc district, its magnetizing coil and reversible adjusting pressuring dc power device join.This arc controlled magnetic mirror direct current electric arc furnace, advantage such as have the production efficiency height, materials consumption is low, quality product is high, the energy is economized, noise is little is comparatively ideal energy-saving electric arc furnace.
Description
The invention belongs to the smelting equipment field.Be to be used for metal smelting in a kind of industrial production, the electric arc furnace of alloy and all electro-conductive materials.
Normally used electric arc furnace is a three-phase ac electric arc furnace in the industry, ac arc furnace exists many shortcomings, and is low as power factor, and three phase power is unbalanced, the short network loss of secondary is lost big, the electric arc instability, and can cause voltage ripple of power network, cause the illumination flicker public hazards, noise is big, refractory wear is big during with refractory material furnace lining, and thermosteresis is big during water black furnace lining, and consumption of electrode is many etc.
Direct current electric arc furnace can be avoided the shortcoming of ac arc furnace, so after high-power silicon rectifier cell came out, each industrial advanced country was all at the development direct current electric arc furnace.Cooperate as Sweden ASEA company and West Germany KRUPP company, adopt stagged electrode structure, made direct current electric arc furnace in nineteen eighty-three.Referring to West Germany's data: " Single Electrode DC Arc Furnace Jointlg developed by ASEA and KRUPP ".Single electrode direct current arc furnace conducts electricity by furnace bottom and to constitute current paths.Its disadvantage is that furnace bottom must be the good conductor of electricity, but requires that heat-insulating property and high-temperature behavior are preferably arranged, and can't pollute and be smelted thing.Also to solve bottom electrode and can not be repaired by refractory materials with smelting thing loose contact and furnace bottom, can only integral replacing, and be prone to the pernicious problem such as end accident of wearing owing to monitor carelessness.Therefore, single electrode direct current arc furnace is not widely adopted industrial.
The United States Patent (USP) of announcing on October 28th, 1985: 4549301, proposed how on direct current electric arc furnace, to avoid using the technical scheme of hearth electrode.It is to pass one of furnace bottom lining installation can lead probe, contacts with melt and detects its current potential, adjusts the vertical range of electrode and melt with detecting data simultaneously, thereby reaches the purpose of control arc parameter.The not only used probe of this method is easy burn-out very, and the senser element of still needing, and the quality of these control devices directly influences the accuracy of control signal.Therefore, this scheme poor reliability.
Chinese patent: 85203717.1 " magnetic mirror formula direct current electric arc furnaces ", its main power circuit is that reactor is serially connected between isolating switch and the transformer, the positive pole of the direct supply after the silicon diode rectification and middle Graphite Electrodes join, two root graphite electrodes of negative pole and anodal both sides join, and control arc device is set on the top of electric arc furnace body of heater, be a magnetic mirror coil around body of heater.Utilize magnetic mirror to retrain arc blow, thereby can adopt the multi-electrode power supply, overcome the critical defect that the single electrode direct current arc furnace bottom electrode exists.Simultaneously, it is than at furnace bottom probe being installed.The United States Patent (USP) of controlling electric arc through the senser element feedback signal is simple, reliable, and practicality is more arranged.But, when magnetic mirror formula direct current electric arc furnace adopts three electrodes, under the electrode of two identical polars, electric arc can occur and alternately ignite, extinguish phenomenon, thereby burn-off rate is reduced.If when adopting two electrodes, cold zone can occur in the stove, this is distinguished if any heavy scrap, and melting period is significant prolongation then.In addition, the complicated drift phenomenon of plasma body can make the refractory materials local damage.
The purpose of the invention is in order to remedy the deficiency of magnetic mirror formula direct current electric arc furnace, to propose a kind of technical scheme that can more reasonable, more effectively control arc blow, makes arc controlled magnetic mirror direct current electric arc furnace reach energy-conservation, high-quality, target efficiently.
The invention is characterised in that described main power circuit can be the secondary side silicon controlled rectifier of transformer, to electric furnace power supply, when the work short circuit, after move tripping pulse, with limiting short-circuit current.Can in DC loop, seal in direct current reactor,, avoid occurring element over-temperature and damage, suppress dynamic short-circuit current to guarantee that the three-phase controllable silicon element after phase shift, still keeps 120 ° conduction angle.Described magnetic mirror coil can be used the silicon-controlled voltage regulation DC power supply.Therefore, the magnetic mirror coil also can suitably increase and decrease electric current except the constraint arc blow, to regulate the blow angle of electric arc in vertical surface.Described control arc device can also be positioned at place, plane, arc district outside body of heater, three electro-magnet that are mutually 120 ° are set, its magnetizing coil and reversible adjusting pressuring dc power join, therefore, the polarity of three electro-magnet and magnetic potential, the sense of current and size in all available its magnetizing coil of change are come independent regulation.Thereby the magnetic field of the horizontal direction that ultralow frequency of formation is rotated in stove, field direction also can be adjusted in any direction in 360 ° of scopes, and this magnetic field is the direction of may command arc blow.Described Graphite Electrodes is two, joins with positive and negative direct supply respectively, and asymmetric distribution is taked in the position of electrode in stove, and the tool negative pole is located at slightly inclined to one side fire door one side in stove center, and positive pole is located at opposite side, the oral-lateral of promptly tapping.Its objective is in melting period, utilize the natural blow of electric arc, at first the fusing of the furnace charge in fire door district,, and the fire door cold-zone is compensated, to reduce control arc workload in order to melting conditions of observing furnace charge and the operation of control arc.Positive and negative electrode also is connected with automatic-adjusting device, and it is by the positive and negative electrode power distributing circuit, the electrode power given circuit, and electrode power setter and topworks form.Therefore, can regulate automatically by the counter electrode electric current.The automatic adjusting of all right counter electrode voltage to ground can make anodal short arc work, to reduce the scaling loss of hot-zone power input and refractory materials.Melt when slow when there is the bulk material hot-zone, also can make anodal long arc work.
The invention not only can be controlled the vertical blow angle of electric arc, can also control the horizontal blow angle of electric arc, therefore, has solved the serious blow problem of direct current arc under the effect of self-field power, makes direct current electric arc furnace can adopt the multi-electrode power supply plan.Because the control of electric arc makes the heat in the stove can guide the bulk furnace charge that is difficult to melt into, has shortened melting period, and can more effectively reduce the scaling loss of refractory materials.
Advantages such as the invention has the production efficiency height, and materials consumption is low, and quality product height, the energy are economized, and noise is little.It is comparatively ideal energy-saving electric arc furnace.
The invention can also be illustrated by following examples.
Fig. 1 is a kind of formation of arc controlled magnetic mirror direct current electric arc furnace.
Fig. 2 is the A-A view of Fig. 1.
Three-phase alternating current high-voltage power supply (1), connect with the primary side of furnace transformer (4) by isolator (2) and vacuum interrupter (3), the secondary side of electric furnace transformation is through silicon controlled rectifier (5), is AC rectification direct current, and seal in direct current reactor (6), connect with two root graphite electrodes (8) then, in stove, power.The top of body of heater (13) is wound with magnetic mirror coil (9), provide electric current and voltage adjustable direct current by magnetic mirror power supply (7) to it, three control electro-magnet (10) are 120 ° and are distributed in the plane, arc district, and its magnetizing coil provides magnetizing current by reversible adjusting pressuring dc power device (11) to it.
The drawing explanation:
1-AC power 2-isolating switch
3-isolating switch 4-transformer
5-silicon controlled rectifier 6-direct current reactor
7-magnetic mirror power supply 8-Graphite Electrodes
9-magnetic mirror coil 10-electro-magnet
The reversible adjusting pressuring dc power 12-of 11-bell
13-body of heater 14-electrode power setter
15-positive and negative electrode power distributing circuit
16-electrode power given circuit
The 17-electrode power is regulated topworks.
Claims (4)
1, be used for metal smelting, the arc controlled magnetic mirror direct current electric arc furnace of alloy and all electro-conductive materials, its main power circuit is that reactor is serially connected between isolating switch and the transformer, direct supply after the silicon diode rectification, positive pole joins with the Graphite Electrodes that is positioned at body of heater central authorities, two root graphite electrodes of negative pole and anodal both sides join, establish control arc device in upper of furnace body, it is a magnetic mirror coil around body of heater, it is characterized in that, described main power circuit can be the secondary side joint silicon controlled rectifier at transformer, can seal in direct current reactor, described Graphite Electrodes is two, respectively and just, negative direct supply joins, asymmetric distribution is taked in the position of electrode in stove, just, negative potential also is connected with automatic-adjusting device, and described magnetic mirror coil and adjusting pressuring dc power are connected, described control arc device can also be positioned at place, plane, arc district and set up three electro-magnet that are mutually 120 ° outside body of heater, its magnetizing coil and reversible adjusting pressuring dc power device join.
According to the described arc controlled magnetic mirror of claim 1 direct current electric arc furnace, it is characterized in that 2, the asymmetric distribution of described electrode is meant that its negative pole is located at body of heater center fire door one side slightly partially, positive pole is located at tap hole one side.
3, according to the described arc controlled magnetic mirror of claim 1 direct current electric arc furnace, it is characterized in that described electrode automatic-adjusting device is by the positive and negative electrode power distributing circuit, the electrode power given circuit, electrode power setter, electrode power are regulated topworks and are formed.
According to the described arc controlled magnetic mirror of claim 1 direct current electric arc furnace, it is characterized in that 4, described adjusting pressuring dc power can be the silicon-controlled voltage regulation direct supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89104794 CN1020953C (en) | 1989-07-11 | 1989-07-11 | Dc electric-arc furnace with arc-controlling megnetic mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89104794 CN1020953C (en) | 1989-07-11 | 1989-07-11 | Dc electric-arc furnace with arc-controlling megnetic mirror |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1048750A true CN1048750A (en) | 1991-01-23 |
| CN1020953C CN1020953C (en) | 1993-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89104794 Expired - Fee Related CN1020953C (en) | 1989-07-11 | 1989-07-11 | Dc electric-arc furnace with arc-controlling megnetic mirror |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020953C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2486717C2 (en) * | 2011-07-12 | 2013-06-27 | Открытое Акционерное Общество "Тяжпрессмаш" | Electric arc dc furnace |
| CN105518401A (en) * | 2013-07-04 | 2016-04-20 | 首要金属科技奥地利有限责任公司 | Method for operating an electric arc furnace and electric arc furnace |
| CN107020293A (en) * | 2017-05-03 | 2017-08-08 | 江苏天楹环保能源成套设备有限公司 | A kind of new bipolar electrode direct-current arc system for castoff fusing |
| CN109612280A (en) * | 2018-12-03 | 2019-04-12 | 北京奥邦新材料有限公司 | A kind of bottomless electrode DC mineral hot furnace of multiloop |
| CN110106309A (en) * | 2019-04-02 | 2019-08-09 | 北京奥邦新材料有限公司 | A kind of bottomless electrode plasma ladle furnace of multiloop direct current |
| IT201800006804A1 (en) * | 2018-06-29 | 2019-12-29 | METAL LEVEL DETECTION DEVICE IN AN ELECTRIC ARC OVEN |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102008058605A1 (en) * | 2007-12-18 | 2009-07-02 | Sms Demag Ag | Apparatus for recovering metals or metal compounds from a material containing the metal or metal compound |
| RU2598421C1 (en) * | 2015-04-17 | 2016-09-27 | Открытое Акционерное Общество "Тяжпрессмаш" | Dc arc furnace |
| RU182794U1 (en) * | 2017-10-18 | 2018-09-03 | Общество с ограниченной ответственностью "Промышленная группа "Металлургия благородных металлов" | DC Arc Furnace |
-
1989
- 1989-07-11 CN CN 89104794 patent/CN1020953C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2486717C2 (en) * | 2011-07-12 | 2013-06-27 | Открытое Акционерное Общество "Тяжпрессмаш" | Electric arc dc furnace |
| CN105518401A (en) * | 2013-07-04 | 2016-04-20 | 首要金属科技奥地利有限责任公司 | Method for operating an electric arc furnace and electric arc furnace |
| CN105518401B (en) * | 2013-07-04 | 2017-05-24 | 首要金属科技奥地利有限责任公司 | Method for operating an electric arc furnace and electric arc furnace |
| CN107020293A (en) * | 2017-05-03 | 2017-08-08 | 江苏天楹环保能源成套设备有限公司 | A kind of new bipolar electrode direct-current arc system for castoff fusing |
| CN107020293B (en) * | 2017-05-03 | 2023-04-25 | 江苏天楹环保能源成套设备有限公司 | Novel double-electrode direct-current arc system for melting waste |
| IT201800006804A1 (en) * | 2018-06-29 | 2019-12-29 | METAL LEVEL DETECTION DEVICE IN AN ELECTRIC ARC OVEN | |
| WO2020003230A1 (en) * | 2018-06-29 | 2020-01-02 | Danieli & C. Officine Meccaniche S.P.A. | A detection system for detecting the level of metal in a melting furnace |
| CN109612280A (en) * | 2018-12-03 | 2019-04-12 | 北京奥邦新材料有限公司 | A kind of bottomless electrode DC mineral hot furnace of multiloop |
| CN110106309A (en) * | 2019-04-02 | 2019-08-09 | 北京奥邦新材料有限公司 | A kind of bottomless electrode plasma ladle furnace of multiloop direct current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1020953C (en) | 1993-05-26 |
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