CN107805683A - The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter - Google Patents
The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter Download PDFInfo
- Publication number
- CN107805683A CN107805683A CN201711077569.8A CN201711077569A CN107805683A CN 107805683 A CN107805683 A CN 107805683A CN 201711077569 A CN201711077569 A CN 201711077569A CN 107805683 A CN107805683 A CN 107805683A
- Authority
- CN
- China
- Prior art keywords
- converter
- venting
- rifle
- dust explosion
- oxygen
- 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
Links
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
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- 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
- C21C5/30—Regulating or controlling the blowing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a kind of method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter, its technique is：When proposing rifle deslagging in the converter steelmaking process for the first time, oxygen rifle carries to fire door and carries out nitrogen flushing, the volume content O of gas in deduster2≤ 6% and CO≤9% after stop nitrogen flushing.This method supplies system by optimizing a slag making, using converter oxygen gun nitrogen flushing, will stop O in the laggard electric-field dust collector in meditation of blowing2Volume content is controlled below 6%, effectively avoids CO and O2The explosion condition of mixed gas, electrostatic field deduster venting of dust explosion during so as to avoid double slag operation of converter, stable converter producing rhythm is played, reduce the effect that cleaner damage increases the service life.Converter simultaneously uses double slag operation, improves converter P control abilities, meets high-end variety steel batch production demand.
Description
Technical field
Electrostatic precipitation is let out during preventing the double slag meltings of converter the present invention relates to a kind of converter smelting process, especially one kind
Quick-fried method.
Background technology
Electrostatic field deduster is to apply a kind of important dedusting method in steelmaking converter, is removed with traditional OG wet method converters
Dirt technique is compared, and its advantage is water saving, economize on electricity, take up an area less, dust removing effects are more preferable, and can reclaim dry dedusting ash, at present
At home and abroad steelmaking converter is used widely.Often explode, cause in electric field during electrostatic field deduster use
Explosion venting valve flicks.Venting of dust explosion refers to fire the high pressure in container or inside pipeline by explosion venting device to be directed at unburned mixture body
Exterior space, a kind of technology for making internal detonation, blast pressure reduce rapidly, but this is a kind of remedial measure, in electric field frequently
Generation blast brings serious harm to converter producing, causes to damage to electric dust removing system equipment.Due to electrostatic field deduster venting of dust explosion
The significant damage of accident, there are many strict operation limitations to traditional converter steelmaking process, wherein most stringent of technique limits
It is to prevent converting process midway to play rifle blow off.Double slag process is exactly the slag twice in smelting process, continues smelting after first time deslagging
Slag making again is refined, is just tapped after second of deslagging, this method is primarily to deep dephosphorization.Because the variety steel quality of production requires,
After many steel grades need converter to take double slag operation, primary slag to make, play rifle deslagging, carry halfway rifle blow off be it is inevitable,
Therefore, it is that converter dry dust removal needs to solve the problems, such as that double slag operation of converter, which avoids electrostatic field deduster venting of dust explosion,.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of effect it is good prevent the double slag meltings of converter during electrostatic remove
The method of dirt venting of dust explosion.
In order to solve the above technical problems, the technical solution used in the present invention is：In the converter steelmaking process for the first time
When proposing rifle deslagging, oxygen rifle carries to fire door and carries out nitrogen flushing, the volume content O of gas in deduster2≤ 6% and CO≤9% after stop blowing
Nitrogen.
After primary slag of the present invention is made, blown using high rifle position, reduce oxygen flow so that gas in deduster
Volume content CO≤30%.The high rifle position blowing of the oxygen rifle, rifle position control in 1.7~2.2m, oxygen flux control 22000~
26000Nm3/h。
It is using beneficial effect caused by above-mentioned technical proposal：The present invention supplies system by optimizing a slag making,
Using converter oxygen gun nitrogen flushing, will stop entering O in deduster after blowing2Volume content is controlled below 6%, effectively avoids CO and O2
The explosion condition of mixed gas, electrostatic field deduster venting of dust explosion during so as to avoid double slag operation of converter, play stable converter producing section
Play, reduce the effect that cleaner damage increases the service life.Converter simultaneously uses double slag operation, improves converter P control energy
Power, meet high-end variety steel batch production demand.
The present invention controls converter CO growing amounts, progress oxygen rifle is blown after carrying rifle by controlling oxygen lance position and flow before blow off
Nitrogen, nitrogen are non-explosivity gas, and will bessemerize caused flue gas using nitrogen separates with the air sucked during blow off, and
The air of flue gas and suction during to blow off in flue is diluted, and reduces deduster CO volume contents below 9%, O2Volume
Content is controlled below 6%, makes CO and O2Mixed gas avoids explosion condition, eliminates safe hidden trouble, and ensures that production is smoothed out,
Reduce the infringement to cleaner.
Embodiment
With reference to embodiment, the present invention is further detailed explanation.
During the double slag meltings of converter, in blow off deslagging after primary slag is made, in fire door air suction flue, with flue
Coal gas of converter, which is mixed into electrostatic field deduster, carries out dedusting, when the CO contents of gas in electrostatic field deduster are more than 9vol%
Or O2More than 6vol% internal combustion or venting of dust explosion phenomenon will occur for content.Originally electrostatic precipitation venting of dust explosion during the double slag meltings of converter is prevented
Method, reduce oxygen flow before on the one hand carrying rifle blow off by oxygen rifle and high rifle position blows, reduce molten bath CO growing amounts；The opposing party
Face, oxygen rifle are carried to fire door and carry out nitrogen flushing, and CO, 0 in the air in flue will be sucked by nitrogen flushing2It is diluted, reduces electrostatic field
The O of gas in deduster2Content is in 6vol% and following, and CO contents are in 9vol% and following；Meanwhile nitrogen mixes with what air was formed
Close gas and a gas column is formed in flue, avoid coal gas of converter from mixing gas venting of dust explosion with air.
Entirely smelting process is：Converter iron making terminates lower rifle blowing, carries out a slag making, opens and blow using normal mode, beat
Firelock position is controlled in 1.3~1.4m, and rifle position control is in 1.5~1.7m after striking sparks successfully, while adds slag charge and carry out a slag making.
4~5min of oxygen blast, begin with clinker and overflowed from fire door, first slag is formed, and at this moment electric-field dust collector CO volume contents are 35% or so.
Primary slag carries rifle to 1.7~2.2m after making, while reduces oxygen flow to 22000~26000Nm3/ h, by supplying oxygen parameter
Adjustment, CO≤30% has carried out rifle in electrostatic field deduster, and oxygen rifle is carried to fire door progress nitrogen flushing, and nitrogen flow 34000~
38000Nm3/ h, nitrogen flushing time are more than 90S, and electric-field dust collector CO volume contents are down to 9% and following, O2Content control 6% and with
Under, stop nitrogen flushing.
Embodiment 1：Originally prevent the method for electrostatic precipitation venting of dust explosion from using following concrete technologies.
Using 120 tons of converter smeltings, the stove iron making finishes, half steel main component（wt）：C 3.89%、S 0.037%、P
0.159%；Lower rifle starts to blow, while adds lime 1547kg, light-burned 845kg.Oxygen flow sets 28000Nm3/ h, sparking
Rifle position controls 1.32m, 36s to strike sparks successfully, and rifle position control 1.68m carries out slugging.Open when blowing 287s, begin with clinker and overflow in fire door
Go out, primary slag is made, at this moment electric-field dust collector CO volume contents 34%, O2Volume content 0.2%, rotation speed of fan 1628rpm；Carry rifle
Rifle position control reduces the oxygen flow of oxygen rifle to 25000Nm in 1.82m3/ h, it is down to gas CO volume contents in deduster
30%；Oxygen rifle carries to fire door again starts nitrogen flushing, nitrogen flow 34846Nm3/ h, nitrogen flushing 102s stop nitrogen flushing, CO in electric-field dust collector
Volume content is reduced to 9%, in Blowing Nitrogen Process, O2Volume content is up to 5.2%.Do not occur explosion venting valve bullet in above-mentioned smelting process
Open situation.
Embodiment 2：Originally prevent the method for electrostatic precipitation venting of dust explosion from using following concrete technologies.
Using 120 tons of converter smeltings, the stove iron making finishes, half steel main component（wt）：C 4.19%、S 0.024%、P
0.171%；Lower rifle starts to blow, while adds lime 1241kg, light-burned 608kg.Oxygen flow sets 28000Nm3/ h, sparking
Rifle position controls 1.33m, 42s to strike sparks successfully, and rifle position control 1.70m carries out slugging.Open when blowing 240s, begin with clinker and overflow in fire door
Go out, primary slag is made, electric-field dust collector CO volume contents 34%, O2Volume content 0.2%, rotation speed of fan 1602rpm；Put forward rifle rifle position
Control is in 2.0m, adjustment oxygen flow to 24000Nm3/ h, gas CO volume contents in deduster are made to be down to 25%；Oxygen rifle carries again
Start nitrogen flushing, nitrogen flow 36756Nm to fire door3/ h, nitrogen flushing 114s stop nitrogen flushing, and CO volume contents reduce in electric-field dust collector
To 8%, in Blowing Nitrogen Process, O2Volume content is up to 4.8%.Do not occur explosion venting valve in above-mentioned smelting process and flick situation.
Embodiment 3：Originally prevent the method for electrostatic precipitation venting of dust explosion from using following concrete technologies.
Using 120 tons of converter smeltings, the stove iron making finishes, half steel main component（wt）：C 3.98%、S 0.045%、P
0.124%；Lower rifle starts to blow, while adds lime 1077kg, light-burned 644kg.Oxygen flow sets 28000Nm3/ h, sparking
Rifle position controls 1.30m, 39s to strike sparks successfully, and rifle position control 1.64m carries out slugging.Open when blowing 267s, begin with clinker and overflow in fire door
Go out, primary slag is made, at this moment electric-field dust collector CO volume contents 38%, O2Volume content 0.2%；Rifle position control 2.2m is adjusted, is adjusted
Whole oxygen flow is to 26000Nm3/ h, gas CO volume contents in deduster are made to be down to 28%；Oxygen rifle, which is carried to fire door, starts nitrogen flushing,
Nitrogen flow 38000Nm3/ h, nitrogen flushing 108s stop nitrogen flushing, and electric-field dust collector CO is reduced to 8.4%, and in Blowing Nitrogen Process, electric field removes
Dirt device O2Volume content is up to 5.3%.Do not occur explosion venting valve in above-mentioned smelting process and flick situation.
Embodiment 4：Originally prevent the method for electrostatic precipitation venting of dust explosion from using following concrete technologies.
Using 120 tons of converter smeltings, the stove iron making finishes, half steel main component（wt）：C 4.03%、S 0.032%、P
0.138%；Lower rifle starts to blow, while adds lime 1196kg, light-burned 768kg.Oxygen flow sets 28000Nm3/ h, sparking
Rifle position controls 1.40m, 39s to strike sparks successfully, and rifle position control 1.50m carries out slugging.Open when blowing 300s, begin with clinker and overflow in fire door
Go out, primary slag is made, at this moment electric-field dust collector CO volume contents 36%, O2Volume content 0.2%；Rifle position control 1.7m is adjusted, is adjusted
Whole oxygen flow is to 22000Nm3/ h, gas CO volume contents in deduster are made to be down to 27%；Oxygen rifle, which is carried to fire door, starts nitrogen flushing,
Nitrogen flow 34000Nm3/ h, nitrogen flushing 92s stop nitrogen flushing, and electric-field dust collector CO is reduced to 8.8%, in Blowing Nitrogen Process, electric field dedusting
Device O2Volume content is up to 5.6%.Do not occur explosion venting valve in above-mentioned smelting process and flick situation.
Production leadtime：When Hebei steel mill is using conventional converter pair slag melting, 100 heats are smelted through random statistical, are gone out altogether
Existing 32 explosion venting valves flick situation；After this method, 100 heats are smelted through random statistical, does not occur explosion venting valve and flicks feelings
Condition.As can be seen here, the occurrence probability of venting of dust explosion when this method can effectively reduce double slag meltings.
Claims (3)
- A kind of 1. method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter, it is characterised in that：The converter smelting mistake When proposing rifle deslagging in journey for the first time, oxygen rifle carries to fire door and carries out nitrogen flushing, the volume content O of gas in deduster2≤ 6% and CO≤ Stop nitrogen flushing after 9%.
- 2. the method according to claim 1 for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter, it is characterised in that： After the primary slag is made, using high rifle position blow, reduce oxygen flow so that in deduster gas volume content CO≤ 30%。
- 3. the method according to claim 2 for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter, it is characterised in that： The high rifle position blowing of oxygen rifle, rifle position are controlled in 1.7~2.2m, 22000~26000Nm of oxygen flux control3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077569.8A CN107805683A (en) | 2017-11-06 | 2017-11-06 | The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077569.8A CN107805683A (en) | 2017-11-06 | 2017-11-06 | The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107805683A true CN107805683A (en) | 2018-03-16 |
Family
ID=61583479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711077569.8A Pending CN107805683A (en) | 2017-11-06 | 2017-11-06 | The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107805683A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517938A (en) * | 2018-12-07 | 2019-03-26 | 河钢股份有限公司承德分公司 | The method for preventing from bessemerizing dry method dust venting of dust explosion after interrupting |
| CN109868337A (en) * | 2019-04-22 | 2019-06-11 | 中冶华天工程技术有限公司 | A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion |
| CN110527776A (en) * | 2019-09-27 | 2019-12-03 | 山东钢铁股份有限公司 | The unsuccessful processing method of piping and druming fire is opened in a kind of converter |
| CN113215346A (en) * | 2021-05-19 | 2021-08-06 | 宝武集团鄂城钢铁有限公司 | Smelting method for reducing explosion venting incidence rate of converter |
| CN114672608A (en) * | 2022-03-17 | 2022-06-28 | 广西钢铁集团有限公司 | Converter high-efficiency ignition method for avoiding dry dedusting explosion venting |
| CN114921606A (en) * | 2022-05-24 | 2022-08-19 | 芜湖新兴铸管有限责任公司 | Converter blowing method for avoiding discharge explosion |
| CN115125353A (en) * | 2022-06-28 | 2022-09-30 | 安阳钢铁股份有限公司 | Smelting furnace for preventing electric precipitation explosion venting of converter and smelting process control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074463A (en) * | 2013-01-04 | 2013-05-01 | 宣化钢铁集团有限责任公司 | Operation method of lifting lance in the midway of converter steelmaking under dry dedusting condition |
| CN102952917B (en) * | 2012-11-08 | 2015-01-28 | 北京首钢股份有限公司 | Control method for preventing explosion venting of dry dedusting system in converter smelting process |
| CN104962680A (en) * | 2015-05-29 | 2015-10-07 | 内蒙古包钢钢联股份有限公司 | Converter dry method dust-removing explosion-venting control method |
| CN105331765A (en) * | 2015-11-26 | 2016-02-17 | 宣化钢铁集团有限责任公司 | Method for secondary gun feeding blowing of dry dust removing converter |
-
2017
- 2017-11-06 CN CN201711077569.8A patent/CN107805683A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952917B (en) * | 2012-11-08 | 2015-01-28 | 北京首钢股份有限公司 | Control method for preventing explosion venting of dry dedusting system in converter smelting process |
| CN103074463A (en) * | 2013-01-04 | 2013-05-01 | 宣化钢铁集团有限责任公司 | Operation method of lifting lance in the midway of converter steelmaking under dry dedusting condition |
| CN104962680A (en) * | 2015-05-29 | 2015-10-07 | 内蒙古包钢钢联股份有限公司 | Converter dry method dust-removing explosion-venting control method |
| CN105331765A (en) * | 2015-11-26 | 2016-02-17 | 宣化钢铁集团有限责任公司 | Method for secondary gun feeding blowing of dry dust removing converter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517938A (en) * | 2018-12-07 | 2019-03-26 | 河钢股份有限公司承德分公司 | The method for preventing from bessemerizing dry method dust venting of dust explosion after interrupting |
| CN109868337A (en) * | 2019-04-22 | 2019-06-11 | 中冶华天工程技术有限公司 | A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion |
| CN110527776A (en) * | 2019-09-27 | 2019-12-03 | 山东钢铁股份有限公司 | The unsuccessful processing method of piping and druming fire is opened in a kind of converter |
| CN113215346A (en) * | 2021-05-19 | 2021-08-06 | 宝武集团鄂城钢铁有限公司 | Smelting method for reducing explosion venting incidence rate of converter |
| CN113215346B (en) * | 2021-05-19 | 2022-06-14 | 宝武集团鄂城钢铁有限公司 | Smelting method for reducing explosion venting incidence rate of converter |
| CN114672608A (en) * | 2022-03-17 | 2022-06-28 | 广西钢铁集团有限公司 | Converter high-efficiency ignition method for avoiding dry dedusting explosion venting |
| CN114921606A (en) * | 2022-05-24 | 2022-08-19 | 芜湖新兴铸管有限责任公司 | Converter blowing method for avoiding discharge explosion |
| CN115125353A (en) * | 2022-06-28 | 2022-09-30 | 安阳钢铁股份有限公司 | Smelting furnace for preventing electric precipitation explosion venting of converter and smelting process control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107805683A (en) | The method for preventing electrostatic precipitation venting of dust explosion during the double slag meltings of converter | |
| CN101619375B (en) | Method for preventing electric precipitation detonation discharge of top and bottom blown converter | |
| CN103555880B (en) | Method for preventing electric precipitation explosion venting during blowing igniting of semi-steel steelmaking | |
| CN102912074B (en) | Method for preventing dry process dust removal system from exhausting yellow smoke | |
| CN104962680A (en) | Converter dry method dust-removing explosion-venting control method | |
| CN114672608A (en) | Converter high-efficiency ignition method for avoiding dry dedusting explosion venting | |
| CN101880744B (en) | Decarburization converter exhaust gas treatment method utilizing dry-method dust-removing process for electric precipitation without explosion release | |
| CN114350883A (en) | Method for preventing dry dedusting explosion venting by secondary lance feeding in converter double-slag smelting | |
| CN102912073A (en) | Method for preventing vanadium extraction converter dry dedusting system from vented explosion | |
| CN104831015A (en) | Method for avoiding explosion venting of electrostatic dust collector in iron mixing process of converter | |
| CN103498017B (en) | Semisteel converter steelmaking method | |
| CN101117652A (en) | Gas modifying combustion-compensating device for converter evaporation cooling air flue | |
| CN107779550B (en) | The method of molten steel manganeisen additional amount is reduced in a kind of refining process | |
| CN105331765B (en) | Method for secondary gun feeding blowing of dry dust removing converter | |
| CN104862444A (en) | Method for preventing explosion venting of dry dedusting system of catch carbon converter | |
| CN113234883B (en) | Smelting process of converter bottom blowing powder injection | |
| CN114752730B (en) | Method for improving AOD (argon oxygen decarburization) ignition success rate | |
| CN107630120A (en) | A kind of adjusting method of two literary aditus laryngis of converter | |
| CN107012283A (en) | A kind of remained converter slag method | |
| CN108842027A (en) | A kind of dephosphorization converter finishing slag gasification dephosphorization method and smelting process | |
| CN110218841B (en) | Method for producing ultra-low phosphorus steel by converter | |
| CN114480770A (en) | Gasification furnace charge level lowering and furnace shutdown method for Ou smelting furnace | |
| CN104745759B (en) | A kind of method for preventing dry dust removal equipment venting of dust explosion during less-slag operation | |
| CN117418062A (en) | Method for smelting high-manganese molten iron by converter | |
| CN109439915B (en) | Method for online treatment of zinc-containing dust by utilizing sensible heat of blast furnace high-temperature slag and application of method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180316 |