CN2859418Y - A direct current arc inductive stove - Google Patents

A direct current arc inductive stove Download PDF

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Publication number
CN2859418Y
CN2859418Y CN 200520091555 CN200520091555U CN2859418Y CN 2859418 Y CN2859418 Y CN 2859418Y CN 200520091555 CN200520091555 CN 200520091555 CN 200520091555 U CN200520091555 U CN 200520091555U CN 2859418 Y CN2859418 Y CN 2859418Y
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CN
China
Prior art keywords
furnace
molten steel
negative electrode
steel
cooled cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 200520091555
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Chinese (zh)
Inventor
姜周华
沙骏
张天彪
余强
孙国会
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Northeastern University China
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Northeastern University China
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Publication date
Application filed by Northeastern University China filed Critical Northeastern University China
Priority to CN 200520091555 priority Critical patent/CN2859418Y/en
Application granted granted Critical
Publication of CN2859418Y publication Critical patent/CN2859418Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A DC electric arc induction furnace is consisted of a top cathode, a bottom anode conductive brick and bottom belowing porous plug etc. The bottom anode conductive brick is connected with the bottom anode copper bars of the rectifier cabinet via the bottom anode water cooled cable. The top cathode adopts a graphite electrode wherein the lower end is located in the crucible to access the surface of molten steel, and the upper end is connected with top cathode copper bars via the top cathode water cooled cable. The adoptation of the device simulates the refine of molten steel in the LF furnace, solves the problems of molten steel solidification due to the small furnace, less heat capacity and rapid temperature reduction, and can be used for smelting clean steel. The adpotion of single phase DC heating, avoides the short service life of liner and different control caused by small ladle diameter and excessively crowded electrodes, effectively solves the solidification of molten steel. The induction heating and DC heating can be carried out synchronously to shorten the smelting time, prevent the failed steel bridge and ensure the quality of molten steel without increasing the carbon content therein. Inert gas such as argon is blowed into the furnace to agitate the molten pool.

Description

A kind of DC arc induction furnace
Technical field
The utility model relates to technical field of metallurgical equipment, relates 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 utility model provides a kind of and has direct-current arc heating and eddy-current heating, has a DC arc induction furnace of electromagnetism heating function simultaneously.
DC arc induction furnace of the present utility model 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 utility model 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 utility model 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 the utility model DC arc induction furnace structural representation, 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 utility model 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 (2)

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, top 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 top 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.
CN 200520091555 2005-06-30 2005-06-30 A direct current arc inductive stove Expired - Fee Related CN2859418Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520091555 CN2859418Y (en) 2005-06-30 2005-06-30 A direct current arc inductive stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520091555 CN2859418Y (en) 2005-06-30 2005-06-30 A direct current arc inductive stove

Publications (1)

Publication Number Publication Date
CN2859418Y true CN2859418Y (en) 2007-01-17

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CN 200520091555 Expired - Fee Related CN2859418Y (en) 2005-06-30 2005-06-30 A direct current arc inductive stove

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CN (1) CN2859418Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451514C (en) * 2005-06-30 2009-01-14 东北大学 DC arc induction furnace
CN102072653A (en) * 2011-01-14 2011-05-25 杭州因达电炉有限公司 Electric arc induction furnace and smelting control method
CN102937373A (en) * 2012-10-23 2013-02-20 鞍钢股份有限公司 Crucible used for direct-current arc induction furnace and manufacturing method of crucible
CN103836943A (en) * 2012-11-21 2014-06-04 虞文娟 Bottom combined blowing induction furnace
CN103836946A (en) * 2012-11-21 2014-06-04 虞文娟 Induction furnace for metal smelting
CN111952987A (en) * 2020-07-24 2020-11-17 中冶赛迪电气技术有限公司 Direct current electric arc furnace rectification power supply device and control method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451514C (en) * 2005-06-30 2009-01-14 东北大学 DC arc induction furnace
CN102072653A (en) * 2011-01-14 2011-05-25 杭州因达电炉有限公司 Electric arc induction furnace and smelting control method
CN102072653B (en) * 2011-01-14 2015-08-12 广德因达电炉成套设备有限公司 A kind of electric arc induction furnace and smelting control method
CN102937373A (en) * 2012-10-23 2013-02-20 鞍钢股份有限公司 Crucible used for direct-current arc induction furnace and manufacturing method of crucible
CN103836943A (en) * 2012-11-21 2014-06-04 虞文娟 Bottom combined blowing induction furnace
CN103836946A (en) * 2012-11-21 2014-06-04 虞文娟 Induction furnace for metal smelting
CN111952987A (en) * 2020-07-24 2020-11-17 中冶赛迪电气技术有限公司 Direct current electric arc furnace rectification power supply device and control method

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070117