CN108315514A - Blast furnace opening loading method - Google Patents
Blast furnace opening loading method Download PDFInfo
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- CN108315514A CN108315514A CN201810135303.2A CN201810135303A CN108315514A CN 108315514 A CN108315514 A CN 108315514A CN 201810135303 A CN201810135303 A CN 201810135303A CN 108315514 A CN108315514 A CN 108315514A
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- blast furnace
- furnace
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- loading method
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to BF Technology in Bao Steel fields, specifically disclose a kind of blast furnace opening loading method.It includes the following steps：1) each system debug before blast furnace opening and the preparation of blow-on furnace charge；2) empty coke is added into blast furnace, and be filled to furnace bosh or less to form the position of furnace charge cohesive zone；3) it send hot wind to blast furnace, controls wind pressure >=0.100Mpa, and during air-supply continue to be added into blast furnace empty burnt normal to stockline.The blast furnace opening process of the present invention uses half charging method, cold blow-on furnace charge is avoided disposably to put into blast furnace, simultaneously, band wind is blasted after pre-mounted part furnace charge, band wind catches up with stockline that can blow loose metal column, on the one hand the gas permeability for advantageously ensuring that stock column, is on the other hand conducive to the abundant burning of furnace charge, achievees the purpose that save furnace charge.
Description
Technical field
The present invention relates to blast furnace opening process, belong to BF Technology in Bao Steel field, are filled more particularly to a kind of blast furnace opening
Material method.
Background technology
Blast furnace is the beginning in generation furnace life, it is newly-built, in repair, overhaul blast furnace will undergo blow-on recovery process, each blow-on
Whether recovery process is smooth, directly affects the progress of the stove chief of a pit's phase stable smooth operation and indices after blow-on.Blow in burden is not
It is simply full furnace charge will to be filled below blast-furnace line, more important is according to the reasonable gas fluid distrbution demand of blast furnace, by mine coke
Distribution at the desired position, while reducing charging powder amount, for the coal gas circulation road for providing unobstructed after air-supply.
The blow in burden method generally used at present is divided by whether charging process blows：Band wind feeds and is filled without wind
Material, wherein the powder in furnace charge can be blown out by cold wind outside stove with wind loading process, effectively reduces charging powder, meanwhile, it is roused
Wind effect, it is of a relatively loose that furnace charge installs rear stock column, then commonly with wind charge mode before air-supply according to calculating
Blow-on material is filled to normal stockline by feeding table feeding, is blown and is restored according still further to the air-supply regulation being made ready beforehand for, however this dress
The problems such as material mode can cause permeability of stock column poor, and air-supply resume speed is slow, is unfavorable for the smooth recovery of blast furnace opening.
Invention content
In order to solve the above technical problems, working of a furnace fluctuation resistant frequency after blast furnace restores can be reduced the invention discloses a kind of
Blast furnace opening loading method.
To achieve the above object, the invention discloses a kind of blast furnace opening loading method, it includes the following steps：
1) each system debug before blast furnace opening and the preparation of blow-on furnace charge；
2) empty coke is added into blast furnace, and be filled to furnace bosh or less to form the position of furnace charge cohesive zone；
3) hot wind, control hot wind wind pressure >=0.100Mpa are sent to blast furnace, and continued into blast furnace during sending hot wind
It is normal to stockline that empty coke is added, after the stockline of blast furnace is normal, you can add normal furnace charge into blast furnace.
It is further preferred that in the step 3), between the top temperature that controls blast furnace roof is 100~300 DEG C, according to blast furnace
The top temperature control charging rate of furnace roof, if the top temperature of blast furnace roof is less than 100 DEG C, further according to current charging rate
Accelerate charging rate, if the top temperature of blast furnace roof is higher than 300 DEG C, further slows down charging speed according to current charging rate
Degree.
Still further preferably, the hot wind in step 3) provides for the hot-blast stove of blast furnace, ensures sending heat to blast furnace
Before wind, the dome temperature of hot-blast stove is more than 1100 DEG C.
Still further preferably, between empty burnt basicity control described in step 2) and step 3) is 0.9~1.0, step
2) it is consistent with empty burnt constituent and the constituent of blow-on furnace charge described in step 3).
Still more preferably, the blow-on furnace charge in step 1) includes coke and ore, and the ore includes dolomite, stone
At least one of lime stone, sinter, pellet, silica mine and manganese ore.
Still more preferably, each system of step 1) includes at blast furnace feeding and feeding system, supply air system and slag iron
Reason system.
Advantageous effect：
1, blast furnace opening process of the invention uses half charging method, and cold blow-on furnace charge is avoided disposably to put into blast furnace
In, meanwhile, band wind is blasted after pre-mounted part furnace charge, band wind catches up with stockline that can blow loose metal column, on the one hand advantageously ensures that the saturating of stock column
On the other hand gas is conducive to the abundant burning of furnace charge, achievees the purpose that fuel consumption；
2, for blast furnace opening process of the invention after furnace condition recovery is normal, the air quantity of blast furnace is relatively steady, reduces stove
There is the frequency fluctuated in condition.
Specific implementation mode
In order to preferably explain the present invention, below in conjunction with seven blast furnace March of the limited iron-smelter of Wuhan Iron and Steel Plant blow-on process into one
Step illustrates the main contents of the present invention, but present disclosure is not limited solely to following embodiment.
Present embodiment discloses a kind of seven blast furnace opening loading methods, specifically comprise the following steps：
1) preparation before blow-on：Adjust tapping machine angle (the present embodiment is preferably 6 °)；Tap drain skirt before State of Blast Furnace
Good yellow sand；Yellow sand, coke powder are padded in slag iron ditch；Prepare the oxygen hose of burning oxygen carefully；Yellow sand, coke powder have been padded in front of sand mouth, it is fixed
Good baffle；Dry pit is cleaned out；The hot-blast stove of burned blast furnace before air-supply ensures that the dome temperature of the preceding hot-blast stove of air-supply is more than
1100℃；It is ready to make wadding that (for making the material composition of wadding, the form for making lining belongs to conventional technical means, does not appoint
What restriction requirement)；Get out blow-on furnace charge；
The blow-on furnace charge of the present embodiment includes coke and ore, and the ore includes dolomite, lime stone, sinter, ball
Nodulizing, silica mine and manganese ore, the preparation amount that the blow-on furnace charge of seven blast furnaces of the present embodiment is obtained by calculation are as shown in table 1；
1 seven blast furnace opening materials list (one) of table
| Kind | Sintering | Pelletizing | Silica | Lime stone | Dolomite | Manganese ore |
| Quantity (t) | 4000 | 1000 | 200 | 150 | 150 | 100 |
2) pre-mounted part blow-on furnace charge：It is packed into empty coke first into blast furnace, then divides 4 times and O/C2.2 material is added, finally mends again
Add empty coke, it is described empty burnt including 280 tons of coke, 42 tons of dolomite, 42 tons of lime stone, 9.6 tons of silica, 14 tons of manganese
Mine, the O/C2.2 material include 112 tons of coke, 7.2 tons of dolomite, 7.2 tons of lime stone, 176 tons of sinter, 13.7
Silica, 4 tons of the manganese ore of ton；It is specific as shown in table 2；Furnace charge soft heat can be formed below the part blow-on furnace charge to furnace bosh of prepackage
The position of band, the present embodiment are filled to the position of stockline 16.84m；
3) it is 1550m to send hot wind, control hot wind wind pressure >=0.100Mpa, control air quantity to blast furnace3/ min, and in air-supply
It is empty burnt normal to stockline to continue the addition into blast furnace in the process, the speed by controlling charging is to ensure the top temperature of blast furnace roof
Between 100~300 DEG C；The burnt situation of sky being added in the present embodiment is specifically as shown in table 2；I.e. by 440 tons of coke, 28.8 tons
Dolomite, 27.3 tons of lime stone, 7.4 tons of sinter, 55.2 tons of silica, 16 tons of manganese ore are filled to stockline in the middle part of shaft
The position of 13.42m, continue by 260 tons of coke, 16 tons of dolomite, 16 tons of lime stone, 440 tons of sinter, 92 tons
Pellet, 29.2 tons of silica, 8 tons of manganese ore are filled to the position of upper shaft stockline 9.58m, finally by 340 tons of coke, 12
Dolomite, 12 tons of lime stone, 750 tons of sinter, 150 tons of pellet, 31.2 tons of silica, 12 tons of the manganese ore dress of ton
To the position of upper shaft stockline 4.06m.
Specifically, after sending hot wind to blast furnace, stockline puts a stock rod at shaft middle and lower part per 30min, according to spy
The stockline of survey strictly presses feeding plan feeding.
According to top temperature control feeding rhythm, stockline is gradually caught up with.
After stockline reaches upper shaft, stock rod is taken to follow the mode feeding of charge level detection.
After stockline reaches 6.0m, according to the turning angle of normal production setting, according to the matrix automatic distributing set.
2 seven blast furnace opening materials list (two) of table
After above-mentioned stockline restores normal, ensure the air quantity of blast furnace and normal feeding quantity.
In addition, the basicity of the furnace charge indicated in above-mentioned Tables 1 and 2 controls between 0.9~1.0.
It is that quick, the smooth blow-on of seven blast furnaces creates that the present embodiment, which uses half charging method, good permeability of stock column,
Condition；
The air quantity of this blow-on is relatively large and quite steady, in addition to the air quantity fluctuation caused by the discharge of stokehold slag iron, is expecting
That there is a phenomenon where air quantity atrophys in dynamic later recovery process.
Above example is only best citing, rather than a limitation of the embodiments of the present invention.Except above-described embodiment
Outside, the present invention also has other embodiment.All technical solutions formed using equivalent substitution or equivalent transformation, all fall within the present invention
It is required that protection domain.
Claims (6)
1. a kind of blast furnace opening loading method, it is characterised in that：It includes the following steps：
1) each system debug before blast furnace opening and the preparation of blow-on furnace charge；
2) empty coke is added into blast furnace, and be filled to furnace bosh or less to form the position of furnace charge cohesive zone；
3) hot wind, control hot wind wind pressure >=0.100Mpa are sent to blast furnace, and continues to be added into blast furnace during sending hot wind
The empty burnt stockline to blast furnace is normal.
2. blast furnace opening loading method according to claim 1, it is characterised in that：In the step 3), State of Blast Furnace is controlled
Between the top temperature on top is 100~300 DEG C, according to the top temperature control charging rate of blast furnace roof.
3. blast furnace opening loading method according to claim 1, it is characterised in that：The hot wind in step 3) is blast furnace
Hot-blast stove provide, ensured before sending hot wind to blast furnace, the dome temperature of hot-blast stove is more than 1100 DEG C.
4. blast furnace opening loading method according to claim 1, it is characterised in that：Empty burnt basicity control described in step 2)
It is made as between 0.9~1.0, between empty burnt basicity control described in step 3) is 0.9~1.0.
5. blast furnace opening loading method according to claim 1, it is characterised in that：Blow-on furnace charge in step 1) includes coke
Charcoal and ore, the ore include at least one of dolomite, lime stone, sinter, pellet, silica mine and manganese ore.
6. blast furnace opening loading method according to claim 1, it is characterised in that：Each system of step 1) includes that blast furnace supplies
Material and feeding system, supply air system and slag iron processing system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810135303.2A CN108315514B (en) | 2018-02-09 | 2018-02-09 | Blast furnace blow-in charging method |
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| CN201810135303.2A CN108315514B (en) | 2018-02-09 | 2018-02-09 | Blast furnace blow-in charging method |
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| CN108315514A true CN108315514A (en) | 2018-07-24 |
| CN108315514B CN108315514B (en) | 2019-12-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593149A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Smooth blow-in method for large blast furnace for iron making |
| CN113046502A (en) * | 2019-12-27 | 2021-06-29 | 山西建龙实业有限公司 | Blast furnace smelting method for preparing large-ore-batch circulating ore composite material |
| CN114672600A (en) * | 2022-04-20 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating accumulation of vanadium-titanium ore blast furnace smelting hearth center |
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| JPS54127806A (en) * | 1978-03-27 | 1979-10-04 | Sumitomo Metal Ind Ltd | Blast furnace operation |
| CN101671751A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Quantification blow-in method for blast furnace |
| CN104131119A (en) * | 2014-06-20 | 2014-11-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Blast furnace start-up charging ignition method |
| CN105506203A (en) * | 2015-12-24 | 2016-04-20 | 首钢总公司 | Blast furnace blow-in burdening method |
| CN106011339A (en) * | 2016-07-07 | 2016-10-12 | 首钢总公司 | Blow-in burdening method for blast furnace |
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2018
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Patent Citations (5)
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|---|---|---|---|---|
| JPS54127806A (en) * | 1978-03-27 | 1979-10-04 | Sumitomo Metal Ind Ltd | Blast furnace operation |
| CN101671751A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Quantification blow-in method for blast furnace |
| CN104131119A (en) * | 2014-06-20 | 2014-11-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Blast furnace start-up charging ignition method |
| CN105506203A (en) * | 2015-12-24 | 2016-04-20 | 首钢总公司 | Blast furnace blow-in burdening method |
| CN106011339A (en) * | 2016-07-07 | 2016-10-12 | 首钢总公司 | Blow-in burdening method for blast furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593149A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Smooth blow-in method for large blast furnace for iron making |
| CN113046502A (en) * | 2019-12-27 | 2021-06-29 | 山西建龙实业有限公司 | Blast furnace smelting method for preparing large-ore-batch circulating ore composite material |
| CN114672600A (en) * | 2022-04-20 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating accumulation of vanadium-titanium ore blast furnace smelting hearth center |
| CN114672600B (en) * | 2022-04-20 | 2023-08-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating central accumulation of smelting hearth of vanadium titanium ore blast furnace |
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