CN100451514C - DC arc induction furnace - Google Patents
DC arc induction furnace Download PDFInfo
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- CN100451514C CN100451514C CNB2005100467895A CN200510046789A CN100451514C CN 100451514 C CN100451514 C CN 100451514C CN B2005100467895 A CNB2005100467895 A CN B2005100467895A CN 200510046789 A CN200510046789 A CN 200510046789A CN 100451514 C CN100451514 C CN 100451514C
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- molten steel
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Abstract
The present invention relates to a DC arc induction furnace which comprises components, such as a top cathode, a bottom anode conductive brick, a bottom blowing porous plug, etc., wherein the bottom anode conductive brick is connected with a bottom anode copper bar of a rectifier cabinet via a bottom anode water-cooling cable; the top cathode has a graphite electrode, the lower end of the top cathode is arranged in a crucible and can approach to the surface of molten steel, and the upper end of the top cathode is connected with a top cathode copper bar of the rectifier cabinet via a top cathode water-cooling cable. The device can be used for simulating LF furnaces to refine molten steel and solve the technological problem that the molten steel is frozen so that the molten steel can not be refined caused by the reasons that the furnace is small, heat capacity is small, and temperature drops quickly, and the present invention can smelt clean steel. The present invention is heated in a single phase DC heating mode to avoid the problems that electrodes are overcrowded, and the service life of ladle lining is short and is difficult to control due to small calibers of ladles, the present invention can effectively solve the problem that the molten steel freezes in a ladle. Induction heating and DC heating can be carried out simultaneously, smelting time is effectively shortened, the bridging of scrap steel is prevented, and carbon is not added to the molten steel to ensure that the quality of the molten steel, and inert gas, such as argon, can be blew in the furnace to stir a melting bath.
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 (1)
1, a kind of DC arc induction furnace comprises rectifier cabinet, top negative electrode copper bar, top negative electrode water-cooled cable, clamper, top negative electrode, furnace crown, crucible, induction coil, end anode conducting brick, bottom blowing porous plug, spirit pipeline, intermediate frequency conducting copper and water-cooled cable; End anode water-cooled cable, end anode copper bar and intermediate frequency power supply cabinet; 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 links to each other with the end anode copper bar of rectifier cabinet through end anode water-cooled cable, it is characterized in that: the outer wall at the crucible of DC arc induction furnace is provided with induction coil, induction coil is connected with the power supply of water-cooled cable with the intermediate frequency power supply cabinet by the intermediate frequency conducting copper, the top negative electrode is contained on the elevating lever, elevating lever rising and decrease speed are adjustable, and end anode and conductive brick are fixed as one becomes same electric conductor.
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 CN1712871A (en) | 2005-12-28 |
| CN100451514C true CN100451514C (en) | 2009-01-14 |
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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 |
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| Country | Link |
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| CN (1) | CN100451514C (en) |
Families Citing this family (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 decarburization method for iron-carbon melts and apparatus thereof |
| CN109737743B (en) * | 2019-01-14 | 2020-04-14 | 杨智萍 | Automatic bridging breaking device for vacuum induction smelting furnace |
| 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 |
Citations (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 |
| CN1026152C (en) * | 1991-06-20 | 1994-10-05 | 亚瑞亚·勃朗勃威力有限公司 | Direct current arc furnace |
| 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
Patent Citations (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 |
| CN1026152C (en) * | 1991-06-20 | 1994-10-05 | 亚瑞亚·勃朗勃威力有限公司 | Direct current arc furnace |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN1712871A (en) | 2005-12-28 |
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Granted publication date: 20090114 Termination date: 20170630 |