CN106367557A - Method for treating converter mouth slag through oxygen blowing by oxygen lance - Google Patents
Method for treating converter mouth slag through oxygen blowing by oxygen lance Download PDFInfo
- Publication number
- CN106367557A CN106367557A CN201610812582.2A CN201610812582A CN106367557A CN 106367557 A CN106367557 A CN 106367557A CN 201610812582 A CN201610812582 A CN 201610812582A CN 106367557 A CN106367557 A CN 106367557A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- oxygen lance
- converter
- converter mouth
- slagging scorification
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4693—Skull removal; Cleaning of the converter mouth
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2300/00—Process aspects
- C21C2300/06—Modeling of the process, e.g. for control purposes; CII
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for treating converter mouth slag through oxygen blowing by an oxygen lance. The method includes the steps of arranging the position of the oxygen lance and setting the oxygen pressure. Specifically, the method includes the steps of building a mathematic model between the position h of the oxygen lance and an impact converter mouth diameter Dimpact, the number M of spraying holes of the oxygen lance, the included angle alpha between the spraying holes and the center of the oxygen lance as well as the expansion angle beta of spraying holes of a Laval nozzle and determining the position h of the oxygen lance through the mathematic model, wherein h is equal to Dimpact/[(M+1)*tan(alpha+beta)] according to the mathematic model; and setting the oxygen pressure of the oxygen lance to be 60-65% of the normal work pressure of the oxygen lance, and carrying out slag removal operation in the sample waiting process after converting, lance lifting, temperature measuring and sampling. According to the method, by reasonably arranging the position of the oxygen lance and setting the work pressure and the oxygen blowing time, the converter mouth slag is treated through oxygen blowing by the oxygen lance, and damage to converter equipment and converter linings is avoided. Compared with methods of treating the slag through a converter disassembly machine, the method has the advantages that 25 minutes is saved each time, the production and operation efficiency is greatly improved, the operation is safe and fast, and the slag clearing effect is good.
Description
Technical field
The present invention relates to a kind of method that utilization oxygen gun blowing processes converter mouth slagging scorification, belong to converter steelmaking process technology
Field.
Background technology
Converter mouth slagging scorification is a great problem of puzzlement pneumatic steelmaking production and fire door, furnace shell life-span.So-called fire door knot
Slag refers to that slag and metallic particles are welded together, and adhesion is deposited in furnace water-cooling mouth top and inner ring, and thickness, up to 300mm, has
Can brokenly extend downwardly near gudgeon from fire door, be combined with the pyramidal structure of furnace crown, be just stuck on fire door.Blowing
Early stage slag is not yet changed and slag getting dry phase incident metal expulsion is a reason causing fire door slagging scorification, and surplus steel splashes slag
It is the another reason causing fire door slagging scorification；When fire door slagging scorification is serious, thickness can reach more than 400mm, leads to push up bad sublance, blocks and give up
The difficult serious consequence of steel, dress ferrum.Conventional treatment method is with disassembling furnace machine cupola drop mouth at present, although this kind of method can remove stove
Mouthful slagging scorification, but the serious damage often resulting in the neighbouring refractory brick of equipment and fire door even comes off, often processes once at least ten simultaneously
A few minutes, at most four or five ten minutes, occupy a large amount of production times, have a strong impact on converter operating rate.
Content of the invention
The technical problem to be solved is a kind of method providing utilization oxygen gun blowing to process converter mouth slagging scorification,
The method, while not increasing equipment investment, can safely and fast remove fire door slagging scorification, reduces the infringement of equipment and furnace lining,
Improve converter operating rate.
The technical solution adopted in the present invention is:
A kind of method that utilization oxygen gun blowing processes converter mouth slagging scorification, sets including oxygen lance position setting procedure and oxygen pressure
Step；Described oxygen lance position refers to the distance away from converter mouth for the oxygen gun sprayer；
Described oxygen lance position setting procedure is: sets up oxygen lance position and impacts in furnace port diameter, oxygen lance spraying hole count, spray orifice and oxygen rifle
Mathematical model between heart wire clamp angle, the spray orifice angle of flare of Lavalle shower nozzle, determines oxygen lance position using this mathematical model；Specifically
Mathematical model is:
h =dImpact/ [(m+1) × tan(alpha+beta)]；
In formula: dImpactFurnace port diameter, unit: mm are impacted in converter；
α spray orifice and oxygen rifle centerlines；
The spray orifice angle of flare of β Lavalle shower nozzle；
H oxygen lance position, unit: mm；
M oxygen lance spraying hole count；
In described oxygen pressure setting procedure, the oxygen pressure when oxygen blast processes converter mouth slagging scorification for the oxygen rifle is set as that oxygen rifle is refined
The 60%～65% of service pressure during steel.
The method that a kind of above-mentioned utilization oxygen gun blowing processes converter mouth slagging scorification, the every stove steel of described oxygen gun blowing divides 2 times,
And point many heats are carried out, a length of 2～3 minutes during every stove single oxygen blast, interval 5～8 seconds again oxygen blast until fire door slagging scorification is complete
Clean out.
The method that a kind of above-mentioned utilization oxygen gun blowing processes converter mouth slagging scorification, described oxygen gun blowing processes converter mouth
Slagging scorification operation blow rifle thermometric sample after treat sample during carry out.
The present invention by the analysis of lot of experimental data, statistics it is established that oxygen lance position with impact furnace port diameter, oxygen lance spraying
Mathematical model between hole count, spray orifice and oxygen rifle centerlines, the spray orifice angle of flare of Lavalle shower nozzle, using this mathematical model
Can determine that the oxygen lance position value range processing during converter mouth slagging scorification using oxygen gun blowing；The present invention works former according to oxygen rifle
Reason, and pass through many experiments, oxygen rifle oxygen pressure is set as the 60%～65% of oxygen rifle service pressure, this is due to oxygen rifle
The oxygen stream stock that spray orifice ejects is supersonic flow, if oxygen presses through greatly, easily converter mouth and miscellaneous equipment is caused damage；
As oxygen presses through low, then metallic particles should not be lighted a fire, and does not have the purpose of cleaning fire door slagging scorification；Oxygen gun blowing of the present invention processes converter
Fire door slagging scorification operation blow rifle thermometric sample after treat sample during carry out, this is because having liquid steel in stove when sample
Water, fire door slagging temperature is higher, and metallic particles is easily lighted a fire；Simultaneously because treating that the sample time is greater than oxygen blast and processes the slagging scorification time, this
When process fire door slagging scorification be not take up the production time.
The present invention using after measuring temperature of converter sampling when the sample fire door high temperature, spray one with oxygen rifle in the certain altitude short time
The oxygen of constant flow, the metallic particles in fire door slagging scorification is melted away, and now can reach the adhesive quilt that fire door is connected with inner ring
The purpose cut off, thus fire door slag cleaning is come off, improves converter operating rate.
Beneficial effects of the present invention:
The present invention, by the reasonable set to existing oxygen lance position, operating pressure and oxygen blow duration, is processed with oxygen gun blowing and turns
Stove fire door slagging scorification, will not cause damage to converter installation and converter lining；And the method is more time-consuming than being processed with disassembling furnace machine
25min/ time, substantially increase production operational availability, have the advantages that safely, quickly, slag cleaning effect good；The method is acceptable
Save the consumption of disassembling furnace machine fuel oil and drill bit, can be applicable in converter producing field.
Specific embodiment
The method that a kind of present invention utilization oxygen gun blowing processes converter mouth slagging scorification, robs a setting procedure and oxygen including oxygen rifle
Atmospheric pressure setting procedure；Described oxygen rifle is robbed position and is referred to the distance away from converter mouth for the oxygen gun sprayer；Oxygen gun blowing processes converter mouth
Slagging scorification operation blow rifle thermometric sample after treat sample during carry out；This is because having liquid molten steel in stove when sample,
Fire door slagging temperature is higher, and metallic particles is easily lighted a fire；Simultaneously because treating that the sample time is greater than oxygen blast and processes the slagging scorification time, now locate
Reason fire door slagging scorification is not take up the production time.
It is it is established that oxygen lance position and impact after the analysis of lot of experimental data, statistics that oxygen rifle robs a setting procedure
Mathematical modulo between furnace port diameter, oxygen lance spraying hole count, spray orifice and oxygen rifle centerlines, the spray orifice angle of flare of Lavalle shower nozzle
Type, can determine that the oxygen lance position value range processing during converter mouth slagging scorification using oxygen gun blowing using this mathematical model；Specifically
Mathematical model is:
h =dImpact/ [(m+1) × tan(alpha+beta)]；
In formula: dImpactFurnace port diameter, unit: mm are impacted in converter；
α spray orifice and oxygen rifle centerlines；
The spray orifice angle of flare of β Lavalle shower nozzle；
H oxygen lance position, unit: mm；
M oxygen lance spraying hole count；
In oxygen rifle pressure setting procedure, according to oxygen rifle operation principle, and pass through many experiments, oxygen rifle oxygen pressure is set as oxygen
The 60%～65% of rifle service pressure, this is because the oxygen stream stock that nozzle of oxygen lance ejects is supersonic flow, if oxygen presses through
Greatly, then easily converter mouth and miscellaneous equipment are caused damage；As oxygen presses through low, then metallic particles should not be lighted a fire, and does not have clear
The purpose of reason fire door slagging scorification.
The every stove steel of oxygen gun blowing of the present invention divides 2 times, and point many heats are carried out, a length of 2～3 minutes during every stove single oxygen blast,
Interval 5～8 seconds again oxygen blast until fire door slagging scorification clean out completely.
Below by way of specific embodiment, the present invention is elaborated:
Embodiment 1:
First, carry out the setting of oxygen lance position by mathematical model；Certain smelter 120t converter mouth internal diameter is 3000mm, oxygen
Service pressure during rifle oxygen furnace steel is 0.6mpa, and oxygen gun sprayer orifice number m is 5, and oxygen rifle center angle α is 13.5 °,
The expansion angle beta of Lavalle shower nozzle is 2.9 °；
h =dImpact/ [(m+1) × tan(alpha+beta)]；
In formula: dImpactFurnace port diameter, unit: mm are impacted in converter；
α spray orifice and oxygen rifle centerlines；
The spray orifice angle of flare of β Lavalle shower nozzle；
H oxygen lance position, unit: mm；
M oxygen lance spraying hole count；
By above mathematical model can draw oxygen gun sprayer apart from fire door h=1699mm when, impact diameter be 3000mm；If Converter
Mouthful slagging scorification thickness is 500mm, then converter impact furnace port diameter is 2000mm, according to above-mentioned mathematical model can calculate oxygen gun sprayer away from
From fire door h=1133mm when, impact diameter be 2000mm；It can thus be appreciated that: oxygen gun sprayer away from converter mouth distance in 1699mm and
When in the range of 1133mm, just match with fire door furnace lining internal diameter and slagging scorification internal diameter, thus by oxygen gun sprayer away from converter mouth
Distance (oxygen lance position) be set as h=1133mm～1699mm；
Then oxygen rifle oxygen pressure is set as 60%～65% of service pressure during oxygen gun blowing steel-making, that is, 0.36～
0.39mpa, after rifle thermometric sampling of having blown treat sample during carry out oxygen blast cleaning slagging scorification operation, oxygen blast duration single 2～
3min, 5～8 seconds interval times blew once again, till fire door slag cleaning finishes after many stoves steel.
Claims (3)
1. a kind of utilization oxygen gun blowing process converter mouth slagging scorification method it is characterised in that: include oxygen lance position setting procedure
With oxygen pressure setting procedure；Described oxygen lance position refers to the distance away from converter mouth for the oxygen gun sprayer；
Described oxygen lance position setting procedure is: sets up oxygen lance position and impacts in furnace port diameter, oxygen lance spraying hole count, spray orifice and oxygen rifle
Mathematical model between heart wire clamp angle, the spray orifice angle of flare of Lavalle shower nozzle, determines oxygen lance position using this mathematical model；Specifically
Mathematical model is:
h =dImpact/ [(m+1) × tan(alpha+beta)]；
In formula: dImpactFurnace port diameter, unit: mm are impacted in converter；
α spray orifice and oxygen rifle centerlines；
The spray orifice angle of flare of β Lavalle shower nozzle；
H oxygen lance position, unit: mm；
M oxygen lance spraying hole count；
In described oxygen pressure setting procedure, the oxygen pressure when oxygen blast processes converter mouth slagging scorification for the oxygen rifle is set as that oxygen rifle is refined
The 60%～65% of service pressure during steel.
2. as claimed in claim 1 a kind of utilization oxygen gun blowing process converter mouth slagging scorification method it is characterised in that: described
Oxygen gun blowing every stove steel divides 2 times, and point many heats are carried out, and a length of 2～3 minutes during every stove single oxygen blast, is spaced 5～8 seconds again
Oxygen blast is until fire door slagging scorification cleans out completely.
3. as claimed in claim 1 or 2 a kind of utilization oxygen gun blowing process converter mouth slagging scorification method it is characterised in that:
Described oxygen gun blowing process the operation of converter mouth slagging scorification after the rifle thermometric that blow samples treat sample during carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812582.2A CN106367557A (en) | 2016-09-09 | 2016-09-09 | Method for treating converter mouth slag through oxygen blowing by oxygen lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812582.2A CN106367557A (en) | 2016-09-09 | 2016-09-09 | Method for treating converter mouth slag through oxygen blowing by oxygen lance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106367557A true CN106367557A (en) | 2017-02-01 |
Family
ID=57900507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610812582.2A Pending CN106367557A (en) | 2016-09-09 | 2016-09-09 | Method for treating converter mouth slag through oxygen blowing by oxygen lance |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN108344307A (en) * | 2018-03-20 | 2018-07-31 | 马鞍山钢铁股份有限公司 | A kind of revolving furnace fume hood accumulated slag method for cleaning and revolving furnace fume hood accumulated slag clear up rifle |
| CN108359765A (en) * | 2018-03-30 | 2018-08-03 | 山东钢铁股份有限公司 | A kind of blowing method for purging converter mouth dry slag |
| CN108507917A (en) * | 2018-04-20 | 2018-09-07 | 宫毅 | The detection method of flue gas dust collecting system dust collection capacity of converter |
| CN108842026A (en) * | 2018-08-21 | 2018-11-20 | 成渝钒钛科技有限公司 | The method for improving steel-making vanadium extraction rate |
| CN108977617A (en) * | 2018-09-03 | 2018-12-11 | 南京钢铁股份有限公司 | One kind scrubbing clinker cross-drilled hole oxygen rifle and its brushing method |
| CN109576445A (en) * | 2018-11-27 | 2019-04-05 | 唐山钢铁集团有限责任公司 | The method for cleaning of RH lower channel and alloy feed opening dross |
| CN111074038A (en) * | 2019-12-27 | 2020-04-28 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| CN114015829A (en) * | 2021-10-20 | 2022-02-08 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN115386674A (en) * | 2022-08-02 | 2022-11-25 | 湖南华菱涟源钢铁有限公司 | Method for removing converter mouth slagging |
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| CN1995405A (en) * | 2006-12-28 | 2007-07-11 | 鞍钢股份有限公司 | Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828933B (en) * | 2017-10-31 | 2020-01-03 | 日照钢铁控股集团有限公司 | Method for controlling thickness of converter lining |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN108344307A (en) * | 2018-03-20 | 2018-07-31 | 马鞍山钢铁股份有限公司 | A kind of revolving furnace fume hood accumulated slag method for cleaning and revolving furnace fume hood accumulated slag clear up rifle |
| CN108359765A (en) * | 2018-03-30 | 2018-08-03 | 山东钢铁股份有限公司 | A kind of blowing method for purging converter mouth dry slag |
| CN108507917A (en) * | 2018-04-20 | 2018-09-07 | 宫毅 | The detection method of flue gas dust collecting system dust collection capacity of converter |
| CN108842026A (en) * | 2018-08-21 | 2018-11-20 | 成渝钒钛科技有限公司 | The method for improving steel-making vanadium extraction rate |
| CN108977617A (en) * | 2018-09-03 | 2018-12-11 | 南京钢铁股份有限公司 | One kind scrubbing clinker cross-drilled hole oxygen rifle and its brushing method |
| CN109576445A (en) * | 2018-11-27 | 2019-04-05 | 唐山钢铁集团有限责任公司 | The method for cleaning of RH lower channel and alloy feed opening dross |
| CN111074038A (en) * | 2019-12-27 | 2020-04-28 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| CN111074038B (en) * | 2019-12-27 | 2022-03-08 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| CN114015829A (en) * | 2021-10-20 | 2022-02-08 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN114015829B (en) * | 2021-10-20 | 2023-01-13 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN115386674A (en) * | 2022-08-02 | 2022-11-25 | 湖南华菱涟源钢铁有限公司 | Method for removing converter mouth slagging |
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Application publication date: 20170201 |