CN104651556A - Furnace blowout method for blast furnace hearth repairing without remainder iron discharge - Google Patents

Furnace blowout method for blast furnace hearth repairing without remainder iron discharge Download PDF

Info

Publication number
CN104651556A
CN104651556A CN201310596070.3A CN201310596070A CN104651556A CN 104651556 A CN104651556 A CN 104651556A CN 201310596070 A CN201310596070 A CN 201310596070A CN 104651556 A CN104651556 A CN 104651556A
Authority
CN
China
Prior art keywords
furnace
iron
blast
blast furnace
repairing
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
CN201310596070.3A
Other languages
Chinese (zh)
Inventor
谢文飞
白雪松
邓勇
李小伟
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.)
TIANTIE METALLURGY GROUP CO Ltd TIANJIN
Original Assignee
TIANTIE METALLURGY GROUP CO Ltd TIANJIN
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 TIANTIE METALLURGY GROUP CO Ltd TIANJIN filed Critical TIANTIE METALLURGY GROUP CO Ltd TIANJIN
Priority to CN201310596070.3A priority Critical patent/CN104651556A/en
Publication of CN104651556A publication Critical patent/CN104651556A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention relates to a metallurgy industry iron making blast furnace blowout operation method. The furnace blowout operation method overcomes the disadvantages of hearth repairing cost increase and time prolongation due to damages of easily appearing gas detonation a furnace root device, a brick lining, a furnace shell and a cooling wall in the furnace roof water spraying material lowering hearth remainder iron discharge operation during blast furnace hearth repairing, and is a furnace blowout method for blast furnace hearth repairing without remainder iron discharge. The method comprises the following steps: introducing steam to the furnace roof when blast furnace iron scrap is completely discharged, reducing the gas pressure at the furnace roof to normal pressure, reducing the pressure of hot wind to 0kpa, and checking; continuously carrying out wind supply and iron discharging on the blast furnace, and carrying out wind stopping furnace blowout when the remainder iron is completely discharged; and taking out furnace charge, and repairing the hearth. The furnace blowout method allows the remainder iron in the hearth to be extruded out through an iron opening depended on the weight of the blast furnace charge in order to reduce the level of molten remainder iron to a height about 500mm lower than the iron opening, so the brick lining in a zone with the height of above 500mm lower than central line of the iron opening is suitable for being repaired. The operation method is in favor of maintaining the furnace roof device and protecting the brick lining, the furnace shell and the cooling wall, reduces the repairing cost of the hearth, and shortens the time.

Description

The stopping process that cupola well does not put residual iron repaired by a kind of blast furnace
Technical field:
The invention relates to the working method of metallurgy industry iron-smelting blast furnace blowing out.
Technical background:
At present, domestic intermediate repair or adopt furnace roof level-lowering of fetching water to put the method for cupola well residual iron when repairing cupola well.This method divides three steps: the first, and blast furnace is by progressively checking, and blow-on top steam, furnace roof level-lowering of fetching water drops to damping down behind shaft position; The second, at the stove skin of furnace throat position four direction with gas welding 100 × 100mm after damping down, get through bricking, four interim water jet standpipe high pressure waters are installed and fall top temperature with water spraying atomization, after slow wind level-lowering to air port, go out last iron; 3rd, after tapping a blast furnace, damping down puts residual iron, determines residual Tie Kou position in advance, cut stove skin, tear cooling stave open when putting residual iron according to the hearth erosion degree of depth, uses the boiled residual iron mouth of oxygen, release residual iron after boring residual iron mouth.Then clear out furnace charge, repair cupola well.This working method easily produces coal gas pinking in level-lowering process, damages furnace top equipment, and damage bricking, stove skin and cooling stave, the cost of repairing cupola well is increased, and time lengthening, becomes its weak point.
Summary of the invention:
The object of the invention is to overcome and when cupola well repaired by blast furnace, to adopt furnace roof level-lowering of fetching water to put in the residual iron operation of cupola well and easily produce coal gas pinking, damage furnace top equipment, damage bricking, stove skin and cooling stave, the cost of repairing cupola well is increased, the shortcomings such as time lengthening, design a kind of blast furnace repairing cupola well and do not put residual iron stopping process.Namely when Blast furnace slag goes out clean, furnace roof leads to steam, and stock gas pressure is dropped to normal pressure, and hot blast blast drops to 0kpa seat material.Then continue to tap a blast furnace to blast furnace air-supply, until slag iron goes out clean rear damping down blowing out.Finally clear out furnace charge, repair cupola well.This stopping process, rely on blast furnace burden deadweight that iron mouth is crossed by the slag Tie Tong in cupola well and extrude, after making blowing out, slag iron liquid level is down to below iron mouth medullary ray about 500mm, the bricking in more than 500mm region under suitable blast furnace repairing iron mouth medullary ray.This working method is beneficial to safeguards furnace top equipment, protection bricking, stove skin and cooling stave, the cost of repairing cupola well is reduced, time shorten.
The object of the invention is to be realized by following technical proposals:
When Blast furnace slag goes out clean, it is inner that steam sends into furnace roof by valve, and stock gas pressure is dropped to below 30kpa by standard-sized sheet high-pressure valve group, with snorting valve, hot blast blast is dropped to 0kpa seat material.Seat expects by snorting valve, cold wind to be sent into blast furnace through hotblast stove after 5 minutes, and blast controls at 100-120kpa, and blast furnace continues row's slag iron by iron mouth, until slag iron goes out clean rear damping down blowing out.Finally clear out furnace charge, repair cupola well.
Accompanying drawing illustrates:
Fig. 1 is blast furnace seat material and return air schematic flow sheet.
Wherein, 1---steam valve; 2---blast furnace; 3---high-pressure valve group variable valve; 4---sack cleaner; 5---gravitational precipitator; 6---blower fan; 7---snorting valve; 8---hotblast stove.
Embodiment:
This blast furnace repair cupola well do not put residual iron stopping process at intermediate repair or repair cupola well time implement, blast furnace repairing cupola well does not put residual iron stopping process as shown in schematic diagram 1, blowing out first three day furnace temperature [Si] controls at 0.4-0.6%, in molten iron, sulfur-bearing [S] controls about 0.05%, control at 0.8-1.0% containing manganese [Mn] in molten iron, molten iron physical thermal controls more than 1450 DEG C, working of a furnace stable smooth operation.Blowing out last iron furnace temperature [Si] controls more than 0.6%, and be consistent before blast, top pressure, stockline and blowing out, before last iron taps a blast furnace two hours stop coal.Spray greatly at iron mouth, slag iron little time, opening steam valve 1, steam to be sent into blast furnace 2 furnace roof inner, and sack cleaner 4, gravitational precipitator 5 and stock gas pressure are dropped to below 30kpa by standard-sized sheet high-pressure valve group variable valve 3.Contact blower fan 6 material, open air-valve 7, drops to 0kpa by hot-blast pressure.Seat material return air after 5 minutes, closes snorting valve 7, cold wind is sent into blast furnace 2 by hotblast stove 8.Return air blast controls at 100-120kpa, continues row's slag iron by iron mouth, until slag iron goes out clean rear damping down blowing out.Finally clear out furnace charge, repair cupola well.
The bricking in more than 500mm region under the present invention's suitable especially blast furnace repairing iron mouth medullary ray.This working method is beneficial to safeguards furnace top equipment, protection bricking, stove skin and cooling stave, the cost of repairing cupola well is reduced, time shorten.

Claims (4)

1. blast furnace repairing cupola well does not put a residual iron stopping process, it is characterized in that: first three sky of blowing out controls furnace temperature, Sulfur Content in Hot Iron, manganese, physical thermal, keeps working of a furnace stable smooth operation, is consistent before blowing out before last iron furnace temperature, blast, top pressure, stockline and blowing out.When Blast furnace slag goes out clean, furnace roof leads to steam, and stock gas pressure is dropped to normal pressure, and hot blast blast drops to 0kpa, seat material.Then continue to tap a blast furnace to blast furnace air-supply, until slag iron goes out clean rear damping down blowing out, finally clear out furnace charge, repair cupola well.
2. a kind of blast furnace repairing cupola well according to claim 1 does not put residual iron stopping process, it is characterized in that: blowing out first three day furnace temperature [Si] controls at 0.4-0.6%, in molten iron, sulfur-bearing [S] controls about 0.05%, control at 0.8-1.0% containing manganese [Mn] in molten iron, molten iron physical thermal controls more than 1450 DEG C, working of a furnace stable smooth operation.Blowing out last iron furnace temperature [Si] controls more than 0.6%, and be consistent before blast, top pressure, stockline and blowing out, before last iron taps a blast furnace two hours stop coal.
3. a kind of blast furnace repairing cupola well according to claim 1 does not put residual iron stopping process, it is characterized in that: spray greatly at iron mouth, slag iron little time, open steam valve, pass into steam to blast furnace roof, bf bag filter, gravitational precipitator and stock gas pressure are dropped to below 30kpa by standard-sized sheet blast furnace high-pressure valve group variable valve.Open air-valve, drops to 0kpa by hot-blast pressure, seat material.
4. a kind of blast furnace repairing cupola well according to claim 1 does not put residual iron stopping process, and it is characterized in that: seat expects return air after 5 minutes, and return air blast controls at 100-120kpa, blast furnace continues row's slag iron by iron mouth, until slag iron goes out clean rear damping down blowing out.
CN201310596070.3A 2013-11-22 2013-11-22 Furnace blowout method for blast furnace hearth repairing without remainder iron discharge Pending CN104651556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310596070.3A CN104651556A (en) 2013-11-22 2013-11-22 Furnace blowout method for blast furnace hearth repairing without remainder iron discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310596070.3A CN104651556A (en) 2013-11-22 2013-11-22 Furnace blowout method for blast furnace hearth repairing without remainder iron discharge

Publications (1)

Publication Number Publication Date
CN104651556A true CN104651556A (en) 2015-05-27

Family

ID=53243193

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310596070.3A Pending CN104651556A (en) 2013-11-22 2013-11-22 Furnace blowout method for blast furnace hearth repairing without remainder iron discharge

Country Status (1)

Country Link
CN (1) CN104651556A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110205423A (en) * 2019-06-27 2019-09-06 武汉钢铁有限公司 A kind of method that coal gas damping down is cut in the release of blast furnace low pressure
CN112899421A (en) * 2021-01-18 2021-06-04 广东韶钢松山股份有限公司 Method for quickly lowering charge level of blast furnace during shutdown

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101696458A (en) * 2009-10-14 2010-04-21 首钢总公司 Method for quantitative stock level-lowering and blowing out of blast furnace
CN101818221A (en) * 2010-04-27 2010-09-01 重庆钢铁(集团)有限责任公司 Method capable of rapidly reaching yield after small and medium maintenance of blast furnace
JP2013001910A (en) * 2011-06-13 2013-01-07 Jfe Steel Corp Device and method for blowing reducing material into blast furnace

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101696458A (en) * 2009-10-14 2010-04-21 首钢总公司 Method for quantitative stock level-lowering and blowing out of blast furnace
CN101818221A (en) * 2010-04-27 2010-09-01 重庆钢铁(集团)有限责任公司 Method capable of rapidly reaching yield after small and medium maintenance of blast furnace
JP2013001910A (en) * 2011-06-13 2013-01-07 Jfe Steel Corp Device and method for blowing reducing material into blast furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黄发元: "马钢2500m3高炉炉缸冷却壁的更换", 《炼铁》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110205423A (en) * 2019-06-27 2019-09-06 武汉钢铁有限公司 A kind of method that coal gas damping down is cut in the release of blast furnace low pressure
CN112899421A (en) * 2021-01-18 2021-06-04 广东韶钢松山股份有限公司 Method for quickly lowering charge level of blast furnace during shutdown
CN112899421B (en) * 2021-01-18 2022-01-11 广东韶钢松山股份有限公司 Method for quickly lowering charge level of blast furnace during shutdown

Similar Documents

Publication Publication Date Title
CN102912051B (en) Method for exchanging cooling wall of blast furnace taphole online
CN100463976C (en) Processing method of combined blowing from top and bottom for maintaining converter and removing cohered steel slag
CN109321699B (en) Method for burning dead coke pile in tuyere area without discharging residual iron during shutdown of blast furnace empty material line
CN107099638B (en) It is a kind of to prevent from dry method dust converter from opening being blown off quick-fried control method
CN105714006A (en) Method for blast furnace stopping for heavy maintenance
CN101696458A (en) Method for quantitative stock level-lowering and blowing out of blast furnace
CN102399926A (en) Furnace halt residue iron outlet method for middle and large-sized blast furnaces
CN101250598A (en) Maintaining method for blast furnace
CN104789733B (en) A kind of maintaining method of converter lining
CN104651556A (en) Furnace blowout method for blast furnace hearth repairing without remainder iron discharge
CN104006658B (en) The method for repairing and mending of metallurgical furnace exhaust fume collecting hood top interior wall
CN103757167B (en) Iron mouth pretreatment process during a kind of blast furnace opening
CN205664662U (en) Copper alloy seals smelting furnace
CN203159642U (en) Air quantity regulation device of blast furnace
CN104593541A (en) Device for melting ladle or residual iron and residual slag in ladle and application method of device
CN100439538C (en) Process of producing iron alloy with low carbon and manganese
CN105368995B (en) A kind of furnace charge method of replacing under blast furnace accident
CN204550647U (en) A kind of device for melting residual iron, residue in ladle or iron bag
CN102925630B (en) Method for preventing water vapour in vacuum hopper and feeding elephant trunk of RH furnace
CN206739336U (en) A kind of converter dedusting line flue automatic ash removing device
CN204255075U (en) Wind vanadophosphoric ferric ore deposit being carried out to ferrovanadium separation melts formula smelting furnace
CN108715940A (en) A method of extending the side-blown converter heating blowing-out time
CN204550463U (en) One is dry puts out anti-coke blocking device in stove
CN207143282U (en) The converter of anti-clinker splash
CN204251641U (en) A kind of converter oxygen gun inserts gun barrel

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150527