CN106337117B - A kind of super thick bed of material sintering method of double basicity composite sinters - Google Patents
A kind of super thick bed of material sintering method of double basicity composite sinters Download PDFInfo
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- CN106337117B CN106337117B CN201610815322.0A CN201610815322A CN106337117B CN 106337117 B CN106337117 B CN 106337117B CN 201610815322 A CN201610815322 A CN 201610815322A CN 106337117 B CN106337117 B CN 106337117B
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- sinter
- basicity
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
Abstract
The invention discloses a kind of super thick bed of material sintering method of double basicity composite sinters, twice cloth, light a fire twice, the upper and lower sinter mixture is different；Mixture A cloth first is added to pallet, fabric thickness is 600~800mm, and through the first igniter fire down draft sintering, the wherein basicity of mixture A is 1.8~2.4；Pallet runs to the distance away from first set ignition system as sintering machine total length
Description
Technical field
The invention belongs to ironmaking production technical fields, are related to sintering production technology, and more particularly to a kind of double basicity are compound
The super thick bed of material sintering method of sinter.
Background technology
Since pellet production cost is higher, lump ore metallurgical performance is poor, and Iron and Steel Enterprises in China is mainly sintered by increasing
The method of mining amount reduces ironmaking cost.Increasing sinter dosage must solve two problems：1) yield of sinter is improved；
2) the iron-smelting raw material alkalinity balance into blast furnace is maintained.
Under the conditions of effective sintering area is fixed, the main method for increasing Sintering Yield is to improve sintering feed thickness
Degree, but with the thickening of sinter bed, increased by the gas-flow resistance of the bed of material, sintering velocity slows down, and this not only adds wind
The power consumption of machine, and productivity of sinter is caused to decline, especially to the enterprise using iron ore concentrate as main raw materials for sintering；The opposing party
For face sinter mixture after high-temperature ignition, charge level melts rapidly encrustation, affects the air capacity being pumped into from top to bottom, empty
Tolerance reduction makes vertical sintering speed is slack-off to directly affect sintering process progress.
Blast furnace raw material structure is generally 60%~70% high basicity sinter at present, with addition of 20%~30% acid ball
Nodulizing and 5%~10% lump ore.In order to maintain the alkalinity balance into blast furnace ironmaking raw material, increase sinter dosage and just must
The basicity of sinter need to be reduced, reducing sinter basicity means that ingredient is close to self-fluxed sinter, self-fluxed sinter
Metallurgical performance is very poor, and sinter basicity is reduced to 1.9 or so has almost arrived the limit, and sintering can be seriously affected by further reducing
The quality of ore deposit, therefore the simple basicity for reducing sinter is difficult to increase substantially the use ratio of sinter.
Double alkalinity sintered ores are using the sinter of two kinds of different basicity in blast furnace ironmaking production.Wherein high alkalinity part
Effect it is constant, low alkalinity part then as acid burden material substitution pellet and natural lump ore, the use of double alkalinity sintered ores be
Improve a trial of the current burden structure of China.With the continuous development of sintering technology, particularly Mini Pelletized Sinter Process
Exploitation, produces to acid sinter ore and application provides condition, and the quality of deep bed sintering bead acid sinter ore is particularly metallurgical
The quality for being even more than acidic pellet ore can have been approached.But conventional sintering technique only carries out a cloth, once lights a fire, it is high
Alkalinity sintered ore and acid sinter ore can only produce on different sintering machines, it is impossible to once sintered two kinds of difference basicity of production
Sinter is unfavorable for the popularization and application of double alkalinity sintered ore production new techniques.
Economic and technical norms are sintered to improve, technical staff did many super thick bed of materials (bed of material height is more than 800 millimeters) and burns
The exploration of knot method, it is intended to the potentiality of deep-bed sintering are further excavated, using increase ignition intensity, high negative pressure Wind Volume direct current
Formula exhausting operation, it is intended to improve thickness of feed layer in this way, but to increase ignition intensity often make deep bed sintering surface melting,
Gap between bed of material particle blocks, entire materialbeds comminution increase, it is necessary to improve the negative pressure and air quantity of wind turbine, cause distinguished and admirable office
Portion's short circuit, the bed of material are not achieved Even Sintering, cause increasing considerably for energy consumption, i.e., prominent without obtaining in terms of super deep-bed sintering
It is broken.
Conventional sintering technique has no longer adapted to new production situation, is unfavorable for reducing sintering cost and blast furnace ironmaking cost,
It needs to study new sintering production technique.
The content of the invention
The purpose of the invention is to propose a kind of deep-bed sintering method of two kinds of alkalinity sintered ores of once sintered production,
A kind of comprehensive basicity is produced suitable for sinter；Increase the yield of sinter, reduce the usage amount of pellet, reduce ironmaking cost.
A kind of super thick bed of material sintering method of double basicity composite sinters, it is characterised in that：Twice cloth, light a fire twice into
Row sintering, and the upper and lower sinter mixture is different, is as follows：
1) sinter mixture A is added to pallet in sintering device handpiece cloth first, and fabric thickness is 600mm~800mm；
Through the first igniter for the first time igniting down draft sintering, firing temperature be 900~1000 DEG C, suction pressure for 8000Pa~
15000Pa；
The sinter mixture A is obtained by iron-bearing material, fuel, lime stone and quick lime through mixer mixed pelletization,
The mass fraction of middle iron-bearing material is 70%~85%, and fuel mass fraction is 3%~4%, Lime Quality fraction for 4%~
6%, adjustment limestone content makes the basicity of mixture A be 1.8~2.4；The granularmetric composition of sinter mixture A is small more than 3mm
It is 30%~35% more than mass percents of the 5mm less than or equal to 8mm in the mass percent 40%~45% equal to 5mm；
2) when pallet runs to the distance away from sintering machine first set ignition system as sintering machine total length
When, add sinter mixture B in the agglomerate surface cloth being sintered, the thickness of cloth is 400mm~600mm, through the
Two igniters are lighted a fire down draft sintering for the second time, and firing temperature is 1050~1150 DEG C, and suction pressure is 12000Pa~20000Pa；
The sinter mixture B is obtained by iron-bearing material, fuel, quick lime through mixer mixed pelletization, and wherein iron content is former
The mass fraction of material is 92%~95%, and fuel mass fraction is 4%~6%, and adjustment quick lime content makes sinter mixture B's
Basicity is not more than 0.5；The granularmetric composition of sinter mixture B be more than 3mm less than or equal to 5mm mass percent 45%~
50%, it is 35%~40% more than mass percents of the 5mm less than or equal to 8mm.
3) when reaching sintering end point, upper strata acid sinter ore and lower floor's high basicity sinter unload ore deposit in tail and crush simultaneously,
Through cooling down mixing and screening mixing, the composite sinter that comprehensive basicity is 1~1.4 is formed.
The sintering machine total length is more than 90m, and machine speed is set as 1.6m/ according to bed of material overall thickness and secondary material distributing position
Min~2.4m/min.
The sinter synthesis basicity is the weighted average by quality of levels sinter basicity, by adjusting upper strata
It is adjusted with the thickness and basicity of lower floor sinter mixture.
The sinter mixture B, the mass percent of iron ore concentrate is 25%~35% in iron-bearing material, the matter of rich ore powder
It is 50%~65% to measure percentage, and the mass percent returned mine is 5%~15%.
Following advantageous effect can be obtained by this method：
1st, the present invention is sintered by cloth twice with igniting twice, makes sintering machine top mixture and lower part mixture
Sintering is carried out at the same time, adds sintering material layer thickness, improves Sintering Yield.
2nd, the present invention is sintered by cloth twice with igniting twice, adjusts the alkali of the upper and lower sinter mixture
Degree, can it is once sintered production two kinds of basicity sinter, reduce sintering cost.
3rd, the present invention once produces the sinter of two kinds of basicity, is crushed by unloading ore deposit, sieves mixing and form a kind of synthesis
The suitable blending ore of basicity, it is possible to reduce the usage amount of pellet reduces ironmaking cost.
Specific embodiment
Embodiment 1
Iron-bearing material, fuel, lime stone and quick lime are obtained into sinter mixture A through mixer mixed pelletization, wherein containing
The mass fraction of iron material is 78%, fuel mass fraction 4%, and Lime Quality fraction is 5%, the quality percentage of lime stone
Number is 13%；The basicity of sinter mixture A is 2.2, and granularmetric composition is more than the mass percent 44% that 3mm is less than or equal to 5mm,
It is 32% more than mass percents of the 5mm less than or equal to 8mm.
Iron-bearing material, fuel, quick lime obtained into sinter mixture B through mixer mixed pelletization, wherein iron-bearing material
Mass fraction is 94%, fuel mass fraction 5%, and the mass percent of quick lime is 1%；The basicity of sinter mixture B is
0.4, granularmetric composition is to be less than or equal to the mass percent 50% of 5mm more than 3mm, more than the quality hundred that 5mm is less than or equal to 8mm
Fraction is 38%；The mass percent of iron ore concentrate is 27% in the iron-bearing material of sinter mixture B, the mass percent of rich ore powder
For 63%, the mass percent returned mine is 10%.
Sintering machine length is 100m, and sinter mixture A cloth is added to pallet, fabric thickness 650mm in head；Through
Igniting down draft sintering, firing temperature are 980 DEG C to first igniter for the first time, suction pressure 11000Pa；When pallet is run
During to 51 that the distance away from sintering machine first set ignition system is sintering machine total length, in the agglomerate surface being sintered
Cloth adds sinter mixture B, and the thickness of cloth is 450mm, lights a fire for the second time down draft sintering through second igniter, and firing temperature is
1080 DEG C, suction pressure 17000Pa.Sintering machine machine speed is set as 1.8m/ according to bed of material overall thickness and secondary material distributing position
min。
When reaching sintering end point, upper strata acid sinter ore and lower floor's high basicity sinter unload ore deposit in tail and crush simultaneously, warp
Mixing and screening mixing are cooled down, forms the composite sinter that comprehensive basicity is 1.3.By 90% composite sinter and 10% block
Ore deposit adds in blast furnace and is smelted iron.
After applying the present invention, sintering machine unit-hour output improves 25%, and sintering solid burnup reduces 1kg/t, ironmaking cost drop
Low 15 yuan/t.
Embodiment 2
Iron-bearing material, fuel, lime stone and quick lime are obtained into sinter mixture A through mixer mixed pelletization, wherein containing
The mass fraction of iron material is 82%, fuel mass fraction 3.2%, and Lime Quality fraction is 5.5%, the quality of lime stone
Percentage is 9.3%；The basicity of sinter mixture A is 1.95, and granularmetric composition is more than the quality percentage that 3mm is less than or equal to 5mm
Number 40% is 35% more than mass percents of the 5mm less than or equal to 8mm.
Iron-bearing material, fuel, quick lime obtained into sinter mixture B through mixer mixed pelletization, wherein iron-bearing material
Mass fraction is 94.5%, fuel mass fraction 5.5%；The basicity of sinter mixture B be 0.2, granularmetric composition be more than
3mm is less than or equal to the mass percent 46% of 5mm, is 40% more than mass percents of the 5mm less than or equal to 8mm；Sintered compound
The mass percent for expecting iron ore concentrate in the iron-bearing material of B is 30%, and the mass percent of rich ore powder is 55%, the quality hundred returned mine
Fraction is 15%.
Sintering machine length is 110m, and sinter mixture A cloth is added to pallet, fabric thickness 750mm in head；Through
Igniting down draft sintering, firing temperature are 950 DEG C to first igniter for the first time, suction pressure 14000Pa；When pallet is run
It is sintering machine total length to the distance away from sintering machine first set ignition systemWhen, in the agglomerate surface being sintered
Cloth adds sinter mixture B, and the thickness of cloth is 550mm, lights a fire for the second time down draft sintering through second igniter, and firing temperature is
1120 DEG C, suction pressure 19000Pa.Sintering machine machine speed is set as 2.2m/ according to bed of material overall thickness and secondary material distributing position
min。
When reaching sintering end point, upper strata acid sinter ore and lower floor's high basicity sinter unload ore deposit in tail and crush simultaneously, warp
Mixing and screening mixing are cooled down, forms the composite sinter that comprehensive basicity is 1.1.100% composite sinter is added in into blast furnace
It is smelted iron.
After applying the present invention, sintering machine unit-hour output improves 30%, and sintering solid burnup reduces 1.5kg/t, ironmaking cost
Reduce by 10 yuan/t.
Claims (3)
1. a kind of super thick bed of material sintering method of double basicity composite sinters, it is characterised in that：Cloth, twice igniting progress twice
Sintering, and the upper and lower sinter mixture is different, is as follows：
(1) sinter mixture A is added to pallet in sintering device handpiece cloth first, and fabric thickness is 650mm~800mm；Through
Igniting down draft sintering, firing temperature are 900~1000 DEG C to first igniter for the first time, and suction pressure is 8000Pa~15000Pa；
The sinter mixture A is obtained by iron-bearing material, fuel, lime stone and quick lime through mixer mixed pelletization, wherein containing
The mass fraction of iron material is 70%~85%, and fuel mass fraction is 3%~4%, and Lime Quality fraction is 4%~6%,
Adjustment limestone content makes the basicity of mixture A be 1.8~2.4；The granularmetric composition of sinter mixture A be greater than 3mm be less than etc.
It is 40%~45% in the mass percent of 5mm, is 30%~35% more than mass percents of the 5mm less than or equal to 8mm；
(2) when pallet runs to the distance away from sintering machine first set ignition system as sintering machine total lengthWhen,
The agglomerate surface cloth being sintered adds sinter mixture B, and the thickness of cloth is 450mm~550mm, through the second igniting
Device is lighted a fire down draft sintering for the second time, and firing temperature is 1050~1150 DEG C, and suction pressure is 12000Pa~20000Pa；
The sinter mixture B obtains by iron-bearing material, fuel, quick lime through mixer mixed pelletization, wherein iron-bearing material
Mass fraction is 92%~95%, and fuel mass fraction is 4%~5.5%, and adjustment quick lime content makes the alkali of sinter mixture B
It spends for no more than 0.5；The granularmetric composition of sinter mixture B be more than 3mm less than or equal to 5mm mass percent 45%~
50%, it is 35%~40% more than mass percents of the 5mm less than or equal to 8mm；The sinter mixture B, in iron-bearing material
The mass percent of iron ore concentrate is 25%~35%, and the mass percent of rich ore powder is 50%~65%, the quality percentage returned mine
Number is 5%~15%；
(3) when reaching sintering end point, upper strata acid sinter ore and lower floor's high basicity sinter unload ore deposit in tail and crush simultaneously, through cold
But mixing and screening mixing form the composite sinter that comprehensive basicity is 1~1.4.
2. a kind of super thick bed of material sintering method of double basicity composite sinters according to claim 1, it is characterised in that：Institute
Sintering machine total length is stated more than 90m, machine speed is set as 1.6m/min~2.4m/ according to bed of material overall thickness and secondary material distributing position
min。
3. a kind of super thick bed of material sintering method of double basicity composite sinters according to claim 1, it is characterised in that：Institute
The weighted average by quality that sinter synthesis basicity is levels sinter basicity is stated, is sintered by adjusting the upper and lower
The thickness and basicity of mixture are adjusted.
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| CN112522460B (en) * | 2020-11-18 | 2022-05-17 | 山东钢铁集团日照有限公司 | Method for adjusting airflow distribution by spreading blast furnace burden |
| CN112760479B (en) * | 2020-12-27 | 2022-03-25 | 中南大学 | Sintering method for improving quality of vanadium-titanium sintered mineral product |
| CN113462889A (en) * | 2021-06-28 | 2021-10-01 | 鞍钢股份有限公司 | Super-thick material layer sintering steam humidifying and heat preserving method |
| CN114250358A (en) * | 2021-12-06 | 2022-03-29 | 江苏沙钢集团有限公司 | Super-thick material layer sintering process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62130227A (en) * | 1985-12-03 | 1987-06-12 | Kawasaki Steel Corp | Method for sintering fine ore |
| JPH09176749A (en) * | 1995-12-26 | 1997-07-08 | Nippon Steel Corp | Production of sintered ore |
| JPH09209050A (en) * | 1996-02-05 | 1997-08-12 | Nippon Steel Corp | Manufacture of sintered ore by high layer thickness |
| CN1924035A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Composite agglomeration technology of iron powdered ore |
| CN103160687A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Method for manufacturing crushing pellet sinter |
| CN104894367A (en) * | 2014-03-05 | 2015-09-09 | 吕庆 | Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer |
-
2016
- 2016-09-12 CN CN201610815322.0A patent/CN106337117B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62130227A (en) * | 1985-12-03 | 1987-06-12 | Kawasaki Steel Corp | Method for sintering fine ore |
| JPH09176749A (en) * | 1995-12-26 | 1997-07-08 | Nippon Steel Corp | Production of sintered ore |
| JPH09209050A (en) * | 1996-02-05 | 1997-08-12 | Nippon Steel Corp | Manufacture of sintered ore by high layer thickness |
| CN1924035A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Composite agglomeration technology of iron powdered ore |
| CN103160687A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Method for manufacturing crushing pellet sinter |
| CN104894367A (en) * | 2014-03-05 | 2015-09-09 | 吕庆 | Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer |
Non-Patent Citations (1)
| Title |
|---|
| 新利佩茨克钢铁公司双层布料双碱度烧结工艺;C.泽温等;《烧结球团》;19950531;第20卷(第3期);第29页第2段 * |
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