CN1710365A - Top-bottom reblowing vacuum inductive stove - Google Patents

Top-bottom reblowing vacuum inductive stove Download PDF

Info

Publication number
CN1710365A
CN1710365A CN 200510046790 CN200510046790A CN1710365A CN 1710365 A CN1710365 A CN 1710365A CN 200510046790 CN200510046790 CN 200510046790 CN 200510046790 A CN200510046790 A CN 200510046790A CN 1710365 A CN1710365 A CN 1710365A
Authority
CN
China
Prior art keywords
oxygen
crucible
port
furnace
reblowing
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.)
Pending
Application number
CN 200510046790
Other languages
Chinese (zh)
Inventor
沙骏
姜周华
孙国会
余强
张天彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeastern University China
Original Assignee
Northeastern University China
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northeastern University China filed Critical Northeastern University China
Priority to CN 200510046790 priority Critical patent/CN1710365A/en
Publication of CN1710365A publication Critical patent/CN1710365A/en
Pending legal-status Critical Current

Links

Abstract

A non-vacuum induction furnace with top blow and bottom blow features setting top oxygen-blowing gun on lifting system with bottom port being inserted in crucible and top port being connected to oxygen pipe, setting bottom blow air- supply element at furnace bottom for gas supply with top port being inserted in crucible and bottom port being connected to gas pipe for blowing inert gas oxygen as required. It has decarbonization function and can be used to simulate double converter and AOD furnace for developing new technology.

Description

A kind of top-bottom reblowing vacuum inductive stove
Technical field
The present invention relates to technical field of metallurgical equipment, relate in particular to the non-vacuum induction furnace that smelting iron and steel is used.
Background technology
The non-vacuum induction furnace of widespread usage does not have top blast system and gas bottom blowing and supplying system at present, it can not be in molten steel oxygen blast and blown inert gas, therefore, traditional steel grade that non-vacuum induction furnace refined only depends on raw material, the quality of material condition directly influences the quality of product, is difficult to adjust in stove.Particularly deal with quite difficulty in the steel scrap under carbon containing, silicon, nitrogen, phosphorus, the sulphur condition with higher, the steel grade that is refined is difficult to become qualified products, even smelt qualified products, production time is longer relatively, cost of material is higher, and the gas in the steel and non-metallic inclusion are higher, smelting low carbon steel, low nitrogen steel difficulty more just especially, or even impossible.Because there is above-mentioned deficiency in traditional non-vacuum induction furnace, so it can't satisfy the needs of smelting High Purity Steel.
Summary of the invention
Problem at above-mentioned prior art exists the invention provides a kind of multi-functional, multiduty top-bottom reblowing vacuum inductive stove that possesses.
Induction furnace of the present invention possesses the function of general non-vacuum induction furnace, and the crucible outer wall is provided with induction coil, and induction coil can be realized the eddy-current heating to furnace charge in the crucible by copper bar and water-cooled cable and intermediate frequency power supply connection.In order to make this induction furnace possess multi-functional, multipurpose, and overcome the defective of existing non-vacuum induction furnace, on stove top top blow oxygen lance is set, the bottom is provided with bottom-blowing air feed element, bottom-blowing air feed element can be bottom blowing porous plug or BOTTOM OXYGEN rifle, and watercooled hood, dust pelletizing system and Detection ﹠ Controling system that some are necessary are set in addition.In the smelting process, the furnace charge in induction furnace is molten to be finished, and when reaching the blowing temperature, watercooled hood is gone to the fire door top, and is dropped to apart from molten steel face certain altitude to the molten steel oxygen supply oxygen flow adjustable size by top blow oxygen lance elevating mechanism control oxygen rifle.By oxygen blast in molten steel, can rapidly the carbon in the molten steel be dropped to reduced levels.Bottom-blowing air feed element has two kinds of forms: when only needing to be blown into the stirring of inert gas molten steel in molten steel, the bottom blowing porous plug is installed, its advantage is to have molten steel to exist under the situation, spirit opening and closing arbitrarily, and porous plug does not stop up; When need from the bottom to steel during oxygen blast, the air supply device of installation is the BOTTOM OXYGEN rifle, utilizes the oxygen supply in molten steel of BOTTOM OXYGEN rifle, can simulate smelting stainless steel or ultra-low-carbon steels such as AOD, K-OBM.
Owing to top blow oxygen lance is set, can so this equipment has the decarburization function, and can simulates every function that the AOD stove that adds the top rifle is the AOD-L stove by top blow oxygen lance oxygen supply in stove.
When the bottom blowing porous plug is set, can in crucible, be blown into inertia in the molten steel and stir gas, can improve the dynamic conditions of melt tank reaction, metallurgical speed is accelerated, reaction between carbon and oxygen more tends to balance, but smelting suprelow carbon steel, simultaneously because the stirring action of inert gas, gas and impurity content in the steel are lower, can smelt ultrapure steel.
When the BOTTOM OXYGEN rifle was set, this equipment had the BOTTOM OXYGEN function, can simulate general A OD stove smelting stainless steel.
The big I of gas flow is regulated as required in the smelting process, and top, spirit body kind can be switched arbitrarily; Can carry out independent top blowing oxygen, BOTTOM OXYGEN, bottom blowing stirring of inert gas, also can push up, end top-bottom blowing simultaneously.Bottom blowing oxygen is will sneak into a certain proportion of argon gas or nitrogen usually to change after the decarburizing reaction dividing potential drop of carbon monoxide in the gas phase, satisfies the thermodynamic condition of decarburizing reaction under different-alloy composition and the carbon content.The ratio of oxygen and inert gas can be set and be controlled automatically to this BOTTOM OXYGEN rifle and corresponding regulation and control system arbitrarily, and the kind of switching inert gas.
Top-bottom reblowing vacuum inductive stove of the present invention is provided with watercooled hood, water-cooled flue, deduster, the gas that produces in the smelting process, dust are collected, are cooled off through watercooled hood, deliver to deduster through water-cooled flue again, dedusting, the discharging of purification back can be avoided atmosphere is polluted.
Non-vacuum induction furnace of the present invention can carry out decarburization, denitrogenation to the molten steel of smelting, the body that degass, go to be mingled with, and shortens the heat, and reduces raw-material requirement, reduces production costs, and smelts High Purity Steel, particularly smelting suprelow carbon steel, super low nitrogen steel.This equipment is smelted the steel grade of specific (special) requirements except that being fit to some medium-sized and small enterprises, is particularly suitable for each big steel smelter and technique center, scientific research institutions' developing new product variety, the needs of simulation combined blown converter and AOD stove exploitation new technology.
Description of drawings
Accompanying drawing is the multi-functional non-vacuum induction furnace schematic diagram of top and bottom complex blowing, comprises 1 intermediate frequency power supply among the figure; 2 copper bars and water-cooled cable; 3 oxygen channels; 4 dedusters; 5 water-cooled flues; 6 oxygen lance lifting systems; 7 top blow oxygen lances; 8 watercooled hoods; 9 furnace crowns; 10 molten steel; 11 crucibles; 12 induction coils; 13 aluminium alloy furnace shells; 14 bottom-blowing air feed elements; 15 spirit pipelines; 16 valve stations.
The specific embodiment
As shown in drawings, top-bottom reblowing vacuum inductive stove comprises intermediate frequency power supply 1, copper bar and water-cooled cable 2, oxygen channel 3, deduster 4, water-cooled flue 5, oxygen lance lifting system 6, top blow oxygen lance 7, watercooled hood 8, furnace crown 9, crucible 11, induction coil 12, aluminium alloy furnace shell 13, bottom-blowing air feed element 14, spirit pipeline 15.Aluminium alloy furnace shell 13 is fixed on the concrete pedestal by gudgeon; The stove inwall is provided with crucible 11, contain in the crucible 11 and treat smelting molten steel 10, crucible 11 outer walls are provided with induction coil 12, and induction coil 12 is fixed within the aluminium alloy furnace shell 13 by brass bolt, induction coil 12 is connected with intermediate frequency power supply 1 with water-cooled cable 2 by copper bar, realizes the eddy-current heating to furnace charge in the crucible; Furnace roof portion is provided with antispray furnace crown 9, furnace crown 9 tops are provided with watercooled hood 8, watercooled hood 8 is communicated with an end of water-cooled flue 5, the other end of water-cooled flue 5 is communicated with deduster 4, the gas that produces in the smelting process, dust are collected, are cooled off through watercooled hood 8, deliver to deduster 4 through water-cooled flue 5 again, discharge after the dedusting.Top blow oxygen lance 7 is contained in the oxygen lance lifting system 6, top blow oxygen lance 7 passes furnace crown 9 and watercooled hood 8, lower port is inserted crucible 8 inside, be positioned at and treat smelting molten steel 10 liquid levels top, upper port is connected with oxygen channel 3, top blow oxygen lance 7 can rotate with watercooled hood 8, and top blow oxygen lance 7 is driven by oxygen lance lifting system 6, in the welcome insertion stove or by proposing in the stove.In the smelting process, the furnace charge in induction furnace is molten to be finished, and when reaching the blowing temperature, watercooled hood 8 is gone to the fire door top, and is dropped to apart from molten steel 10 liquid level certain altitudes to molten steel 10 oxygen supplys, oxygen flow adjustable size by oxygen lance lifting mechanism 6 control top blow oxygen lances 7; Bottom-blowing air feed element 14 can be bottom blowing porous plug or BOTTOM OXYGEN rifle, is arranged at furnace bottom, passes crucible 8 bottom centre, upper port and crucible 8 internal communication, and lower port is connected with spirit pipeline 15, and spirit pipeline 14 is from valve station 16.

Claims (3)

1, a kind of top-bottom reblowing vacuum inductive stove, comprise intermediate frequency power supply, copper bar and water-cooled cable, oxygen channel, deduster, water-cooled flue, the oxygen lance lifting system, top blow oxygen lance, watercooled hood, furnace crown, crucible, induction coil, the aluminium alloy furnace shell, bottom-blowing air feed element, the spirit pipeline, it is characterized in that being provided with top blow oxygen lance and bottom-blowing air feed element is set, top blow oxygen lance is contained in the oxygen lance lifting system, top blow oxygen lance passes furnace crown and watercooled hood, lower port is inserted crucible inside, upper port is connected with oxygen channel, bottom-blowing air feed element is arranged at furnace bottom, pass the crucible bottom center, upper port and crucible internal communication, lower port is connected with the spirit pipeline.
2, according to the described top-bottom reblowing vacuum inductive stove of claim 1, it is characterized in that bottom-blowing air feed element is bottom blowing porous plug or BOTTOM OXYGEN rifle, in the time of need in crucible, being blown into inertia stirring gas, the bottom blowing porous plug is set, when needing BOTTOM OXYGEN, the BOTTOM OXYGEN rifle is set.
3, the application of top-bottom reblowing vacuum inductive stove as claimed in claim 1 is characterized in that utilizing BOTTOM OXYGEN rifle oxygen blast in the molten steel in crucible of this top-bottom reblowing vacuum inductive stove.
CN 200510046790 2005-06-30 2005-06-30 Top-bottom reblowing vacuum inductive stove Pending CN1710365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200510046790 CN1710365A (en) 2005-06-30 2005-06-30 Top-bottom reblowing vacuum inductive stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510046790 CN1710365A (en) 2005-06-30 2005-06-30 Top-bottom reblowing vacuum inductive stove

Publications (1)

Publication Number Publication Date
CN1710365A true CN1710365A (en) 2005-12-21

Family

ID=35706638

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200510046790 Pending CN1710365A (en) 2005-06-30 2005-06-30 Top-bottom reblowing vacuum inductive stove

Country Status (1)

Country Link
CN (1) CN1710365A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103836946A (en) * 2012-11-21 2014-06-04 虞文娟 Induction furnace for metal smelting
CN104567401A (en) * 2015-01-09 2015-04-29 上海交通大学 Melt medium-frequency induction and high-temperature heating device
CN108660290A (en) * 2017-03-29 2018-10-16 鞍钢股份有限公司 A kind of compound ar blowing refining device and method in Medium frequency induction furnace roof bottom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103836946A (en) * 2012-11-21 2014-06-04 虞文娟 Induction furnace for metal smelting
CN104567401A (en) * 2015-01-09 2015-04-29 上海交通大学 Melt medium-frequency induction and high-temperature heating device
CN108660290A (en) * 2017-03-29 2018-10-16 鞍钢股份有限公司 A kind of compound ar blowing refining device and method in Medium frequency induction furnace roof bottom

Similar Documents

Publication Publication Date Title
CN106636953B (en) A kind of effective martensitic stain less steel P91 smelting processes of boiler
CN2804756Y (en) Top-bottom complex blast non-vacuum induction furnace
CN1064999C (en) Producing stainless steel in parallel operated vessels
CN101921895B (en) Process for smelting ultra clean steel by single-nozzle refining furnace
CN108251592B (en) A kind of converter smelting method of extremely low phosphoretic steel
CA2264665A1 (en) Installation and method for producing molten metal
CN105420498A (en) Continuous metallurgic device and metallurgic method
CN100494849C (en) Top-bottom reblowing vacuum inductive stove
CN103045789A (en) Converter smelting method for high-silicon molten iron generated during new blow-in of blast furnace
CN103571999A (en) Method for smelting nitrogen-controlling martensite stainless steel through total molten iron
CN103045793B (en) Vacuum smelting device for converter and use method of vacuum smelting device
CN101294230B (en) Duplex steelmaking technique of revolving furnace
CN102094094B (en) Process for smelting ferronickel from red soil nickel ore
CN105861775A (en) Smelting process for ultra-low phosphorus steel with high nickel content
CN2859419Y (en) A top and bottom compound blow vacuum inductive stove
CN1195079C (en) Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace
CN1710365A (en) Top-bottom reblowing vacuum inductive stove
CN203080002U (en) Converter vacuum smelting device
CN205933887U (en) Keep still device of originality of RH ladle top sediment
CN107043844B (en) A kind of medium frequency induction melting furnace system and method
CN206736297U (en) A kind of vacuum cycle smelting device, medium frequency induction melting furnace system
CN105734198A (en) Manufacturing method for smelting phosphorus-containing weathering-resistant steel through EAF-converter
Fruehan Overview of steelmaking processes and their development
Zulhan et al. Vacuum Treatment of Molten Steel: RH (Rurhstahl Heraeus) versus VTD (Vacuum Tank Degasser)
CN106119465B (en) A kind of device and method of holding RH ladle top slag reproducibilities

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication
C12 Rejection of a patent application after its publication