CN1712871A - DC arc induction furnace - Google Patents
DC arc induction furnace Download PDFInfo
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- CN1712871A CN1712871A CN 200510046789 CN200510046789A CN1712871A CN 1712871 A CN1712871 A CN 1712871A CN 200510046789 CN200510046789 CN 200510046789 CN 200510046789 A CN200510046789 A CN 200510046789A CN 1712871 A CN1712871 A CN 1712871A
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- negative electrode
- induction furnace
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Abstract
A DC arc induction furnace for refining molten steel has the top graphite cathode connected to the cathodic copper bus of rectifier chest via the water-cooled cable and the electrically conductive bottom bricks used as bottom anode connected to the anodic copper bus of rectifier chest via the water-cooled cable. Its advantages are high volume and heat capacity, long service life and high quality of molten steel.
Description
Technical field
The present invention relates to technical field of metallurgical equipment, relate in particular to the induction furnace that smelting iron and steel is used.
Background technology
At present the non-vacuum induction furnace of widespread usage generally is used for melting waste steel.Its operating procedure is at first a certain amount of steel scrap (bulk) to be joined in the induction furnace, and energising is melted then.Because the size and the shape of steel scrap differ, and are easy to cause so-called " bridge formation " phenomenon.Cause the lengthening duration of heat owing to building bridge, the amount of oxidation of steel increases, and the recovery rate of product reduces, the power consumption height, and production cost increases.In addition, owing to build bridge, the operator must manually smash material, thereby causes the loss of furnace lining to strengthen, and furnace life reduces, and therefore, has just caused the production cost increase, and working strength of workers increases, and production efficiency reduces.And non-vacuum induction furnace do not have the liquid steel refining function usually, and the common cleanliness factor of the molten steel of smelting is low, and product quality is relatively poor.Direct current electric arc furnace normally be used for melting waste steel and (or) be used for refined molten steel, its weak point is that the stirring intensity in molten bath is low, the metallurgical reaction dynamic conditions is poor, the non-metallic inclusion in the steel is higher.
Summary of the invention
For overcome direct current electric arc furnace and induction furnace separately shortcoming and keep their advantages separately, the invention provides and a kind ofly have direct-current arc heating and eddy-current heating, have a DC arc induction furnace of electromagnetism heating function simultaneously.
DC arc induction furnace of the present invention is anode at the bottom of furnace bottom is installed furnace bottom conductive brick and big electric current, and end anode adopts water-cooling structure, and end anode and conductive brick are fixed as one becomes same electric conductor, i.e. end anode conducting brick.End anode links to each other with the anode of rectifier cabinet through water-cooled cable.The bottom blowing porous plug is installed on the conductive brick, can in molten steel, be blown into inert gas.The top negative electrode is contained on the elevating lever, and elevating lever rising and decrease speed are adjustable, and the top negative electrode links to each other with the negative electrode of rectifier cabinet by water-cooled cable.When the molten steel in the induction furnace melts and reach the heating refining temperature, the intermediate frequency power supply outage, stop eddy-current heating, start dc rectification power, management system makes the graphite electrode decline of top negative electrode that its lower end is heated until the starting the arc near molten steel surface, and the big I of electric current and voltage adopts manual and automatic dual mode to control.Except that molten steel was heated, direct-current arc heating can also be worked simultaneously with eddy-current heating, simultaneously solid-state steel scrap was heated and melted.This equipment both can be shortened the heat, and can effectively prevent the steel scrap bridge formation again.
Owing to be provided with the direct-current arc heating system, therefore adopt this equipment can simulate LF stove refined molten steel, to have avoided because of stove is too little, thermal capacitance is little, and temperature drop causes molten steel to freeze to carrying out this technical barrier of refining soon; Adopt the single-phase DC mode of heating, electric arc is steady, noise is little, compares with adopting the three-phase alternating current electrode, can avoid little because of the fire door footpath, causes electrode too crowded, and ladle lining life is low, restive problem; Because this direct current electric arc furnace is directly installed on the intermediate frequency furnace,, guarantee that molten steel can " not freeze " bag so in case cross low even molten steel when " freezing " to stove, can restart intermediate frequency power supply molten steel is heated because of certain reason causes liquid steel temperature; Eddy-current heating and DC heating can be carried out simultaneously, can effectively shorten the heat, and prevent the steel scrap bridge formation, and can not guarantee steel quality to molten steel recarburization.
Installation bottom blowing porous plug in anode conducting brick bottom, the end can be blown into inert gas in stove such as argon gas stirs the molten bath, and the tolerance adjustable size is closed freely, even close gas fully, porous plug can not stop up yet.
DC arc induction furnace of the present invention has been integrated the advantage of direct current electric arc furnace and induction furnace and has been overcome their defectives separately, has DC heating and induction heating function, has the function of electromagnetism heating simultaneously.This equipment also is fit to the needs that some special enterprises such as foundry enterprise are produced except that suitable each big steel enterprise and technique center, scientific research institutions' simulation LF stove carry out the liquid steel refining.Utilize this equipment can carry out submerged arc slag making refining and argon bottom-blowing stirring simultaneously, realize the function of LF stove, carry out effective desulfurization, deoxidation and removal non-metallic inclusion, smelt clean steel.Adopt DC arc induction furnace of the present invention to shorten the heat effectively, prevent the steel scrap bridge formation, energy-saving and cost-reducing, the consumption of ferroalloy reduces, and the recovery rate of ferroalloy improves, and the recovery rate of product also significantly improves, production efficiency improves, and working strength of workers reduces.
Description of drawings
Accompanying drawing is a DC arc induction furnace structural representation of the present invention, comprises 1 rectifier cabinet, 2 top negative electrode copper bars, 3 top negative electrode water-cooled cables, 4 clampers, 5 top negative electrodes, 6 furnace crowns, 7 molten steel, 8 crucibles, 9 induction coils, 10 end anode conducting bricks, 11 bottom blowing porous plugs, 12 spirit pipelines, 13 intermediate frequency conducting coppers and water-cooled cable, 14 end anode water-cooled cables, 15 end anode copper bars, 16 intermediate frequency power supply cabinets, 17 valve stations among the figure.
The specific embodiment
As shown in drawings, DC arc induction furnace of the present invention comprises rectifier cabinet 1, top negative electrode copper bar 2, top negative electrode water-cooled cable 3, clamper 4, top negative electrode 5, furnace crown 6, crucible 8, induction coil 9, end anode conducting brick 10, bottom blowing porous plug 11, spirit pipeline 12, intermediate frequency conducting copper and water-cooled cable 13, end anode water-cooled cable 14, end anode copper bar 15, intermediate frequency power supply cabinet 16.Outer wall at the crucible 8 of DC arc induction furnace is provided with induction coil 9, and induction coil 9 is connected with the power supply of water-cooled cable 13 with intermediate frequency power supply cabinet 16 by the intermediate frequency conducting copper, can carry out eddy-current heating to furnace charge in the crucible during melting; Anode at the bottom of furnace bottom is installed furnace bottom conductive brick and big electric current, end anode adopts water-cooling structure, and end anode and conductive brick are fixed as one becomes same electric conductor, i.e. end anode conducting brick 10; End anode conducting brick 10 links to each other with the end anode copper bar 15 of rectifier cabinet 1 through end anode water-cooled cable 14; Top negative electrode 5 adopts graphite electrode, vertically pass furnace crown 6 centers, be fixed on the clamper 4 of elevating lever, elevating lever rising and decrease speed are adjustable, negative electrode 5 lower ends in top are positioned at crucible inside, can be near molten steel 7 surfaces, the upper end links to each other with the top negative electrode copper bar 2 of rectifier cabinet 1 by top negative electrode water-cooled cable 3.When needs carry out the direct-current arc heating to furnace charge, for example during refining, start dc rectification power, management system makes the graphite electrode decline of top negative electrode that its lower end is heated until the starting the arc near molten steel surface, and the big I of electric current and voltage adopts manual and automatic dual mode to control.Except that molten steel was heated, the direct-current arc heating can also be worked simultaneously with eddy-current heating; Bottom blowing porous plug 11 passes furnace bottom conductive brick centre, upper port and crucible 8 internal communication, and lower port is connected with spirit pipeline 12, can carry out bottom blowing gas by furnace charge in crucible, and spirit pipeline 12 is from valve station 17.
Claims (3)
1, a kind of DC arc induction furnace, comprise rectifier cabinet, top negative electrode copper bar, top negative electrode water-cooled cable, clamper, the top negative electrode, furnace crown, crucible, induction coil, end anode conducting brick, the bottom blowing porous plug, the spirit pipeline, intermediate frequency conducting copper and water-cooled cable, end anode water-cooled cable, end anode copper bar, the intermediate frequency power supply cabinet, it is characterized in that being provided with top negative electrode and end anode conducting brick, negative electrode upper end, top links to each other with the top negative electrode copper bar of rectifier cabinet by top negative electrode water-cooled cable, the lower end is positioned at crucible inside, end anode conducting brick is installed on furnace bottom, links to each other with the end anode copper bar of rectifier cabinet through end anode water-cooled cable.
2,, it is characterized in that end anode conducting brick is fixed as one by end anode and conductive brick to constitute according to the described DC arc induction furnace of claim 1.
3, the application of DC arc induction furnace as claimed in claim 1 is characterized in that utilizing this DC arc induction furnace heating molten steel, utilizes this DC arc induction furnace simulation LF stove that molten steel is carried out refining, utilizes this DC arc induction furnace heating or melting waste steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100467895A CN100451514C (en) | 2005-06-30 | 2005-06-30 | DC arc induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100467895A CN100451514C (en) | 2005-06-30 | 2005-06-30 | DC arc induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1712871A true CN1712871A (en) | 2005-12-28 |
| CN100451514C CN100451514C (en) | 2009-01-14 |
Family
ID=35718593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100467895A Expired - Fee Related CN100451514C (en) | 2005-06-30 | 2005-06-30 | DC arc induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100451514C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719617A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Electrochemical decarbonization method and device for iron-carbon melt |
| CN109737743A (en) * | 2019-01-14 | 2019-05-10 | 陶水芳 | A kind of vacuum induction melting furnace bridge formation is automatic to abolish device |
| CN113915999A (en) * | 2021-09-17 | 2022-01-11 | 中冶赛迪工程技术股份有限公司 | Intermediate frequency induction electric arc furnace and smelting control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213284U (en) * | 1987-09-14 | 1988-09-14 | 北京钢铁学院 | Mini multi function vacuum induction furnace |
| CN1013458B (en) * | 1990-02-20 | 1991-08-07 | 太原重型机器厂 | Electromagnetic dc arc furnace with dual u-shaped bottom electrodes |
| US5177763A (en) * | 1990-03-28 | 1993-01-05 | Kawasaki Steel Corporation | Furnace bottom structure of direct current electric furnace |
| CH682281A5 (en) * | 1991-06-20 | 1993-08-13 | Asea Brown Boveri | |
| CN2309343Y (en) * | 1997-06-30 | 1999-03-03 | 王起刚 | Medium-frequency induction furnace capable of remelting electroslag and smelting lined electroslag |
| CN2859418Y (en) * | 2005-06-30 | 2007-01-17 | 东北大学 | A direct current arc inductive stove |
-
2005
- 2005-06-30 CN CNB2005100467895A patent/CN100451514C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719617A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Electrochemical decarbonization method and device for iron-carbon melt |
| CN109737743A (en) * | 2019-01-14 | 2019-05-10 | 陶水芳 | A kind of vacuum induction melting furnace bridge formation is automatic to abolish device |
| CN109737743B (en) * | 2019-01-14 | 2020-04-14 | 杨智萍 | Automatic bridging breaking device for vacuum induction smelting furnace |
| CN113915999A (en) * | 2021-09-17 | 2022-01-11 | 中冶赛迪工程技术股份有限公司 | Intermediate frequency induction electric arc furnace and smelting control method |
| CN113915999B (en) * | 2021-09-17 | 2024-01-23 | 中冶赛迪工程技术股份有限公司 | Medium frequency induction arc furnace and smelting control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100451514C (en) | 2009-01-14 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20170630 |