CN106090978B - A kind of method improving solid fuel utilization rate and its application in sinter production - Google Patents
A kind of method improving solid fuel utilization rate and its application in sinter production Download PDFInfo
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- CN106090978B CN106090978B CN201610462068.0A CN201610462068A CN106090978B CN 106090978 B CN106090978 B CN 106090978B CN 201610462068 A CN201610462068 A CN 201610462068A CN 106090978 B CN106090978 B CN 106090978B
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- Prior art keywords
- solid fuel
- sinter
- blast furnace
- utilization rate
- sintering
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/02—Mixing solid fuel with a liquid, e.g. preparing slurries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
Abstract
A kind of method improving sintering solid fuel utilization ratio belongs to ironmaking agglomeration technology field, unlike conventional solid fuel processing flow：It is crushed manufacturing procedure in solid fuel and adds a solid fuel pneumatic separator, the solid fuel less than 1.0mm is elected, transports to blast furnace process as pulverized coal injection into blast furna to use；Such solid fuel is crushed processing technology, first, can improve sintering solid fuel granularmetric composition, can improve sintered ore rotary drum strength and average grain diameter, reduce blast furnace sinter return rate；Second is that the 1mm solid fuels that are less than that selection by winnowing comes out are used for blast furnace blowing, realize and make the best use of everything, substantially increase the utilization ratio of solid fuel.
Description
Technical field
The present invention relates to metallurgy sintered fields to be crushed more particularly in sintering production process by improving solid fuel
Technique optimizes sintering solid fuel granularity, improves sinter granularmetric composition to reach, improves one kind of sinter average grain diameter
Energy-efficient new method.
Background technology
The scaling loss such as limonite/siderite are being continuously improved always in order to constantly reduce pig iron cost in iron and steel enterprise for many years
The ratio of big Iron Ore Powder；But it is bad with the raising of the larger iron ore ratio of scaling loss in raw materials for sintering structure and its quality
Change, the trend reduced is presented in sinter strength, is embodied in：Sinter granularity becomes smaller, and average grain diameter is caused in the trend that gradually becomes smaller
The mine that partially sinters of a large amount of 5-10mm is sifted out as back powder outside blast furnace, and due to 5-10mm sinter ratios under blast furnace
It increases, also affects the direct motion steady in a long-term of the working of a furnace to a certain extent.
The sinter of sintering regional production transports blast furnace by repeatedly having bad luck, and the ratio of 5mm is not only less than in sinter
It increases, and the ratio of 5-10mm grades increases considerably；Under the blast furnace plus most domestic iron and steel enterprise
Sinter screening plant is all efficient stick sieve, and after stick sieve screening, especially stick sieve closes on the later stage in the service life, and sieve stick is
Abrasion, powder for not being only smaller than 5mm are screened out, and the mine that partially sinters more than 5mm is also screened out into back powder, and height is caused
Sinter return rate increases under stove slot；In iron and steel enterprise's generally existing, these " back powders " are had bad luck to stock yard to be stored this phenomenon
After re-sinter, not only cause to have bad luck expense and increase, but also cause the raising of the waste and pig iron cost of the sintering energy, greatly reduce
The economic benefit of enterprise is iron and steel enterprise's problem in urgent need to solve.
Invention content
The present invention is achieved by the following measures：
Increase by a typhoon optional equipment (i.e. winnowing machine) before the four-roller crusher of fuel crushing room, will be less than in solid fuel
The solid fuel of 1mm is elected, and is then collected by deduster, transports to blast furnace process as pulverized coal injection into blast furna to use；
The solid fuel that granularity is 1mm~3mm carries out dispensing by Belt Conveying to solid fuel feed bin, according to 3%~4% ratio
To produce sinter；In addition, the part more than 3mm, which is sent to four-roller crusher, carries out broken processing, the solid that then will be crushed
Fuel returns again to winnowing machine and carries out grading, and the solid fuel less than 1mm send blast furnace process, the solid fuel of 1mm~3mm to send
Proportioning room solid fuel feed bin, the part more than 3mm return to four-roller crusher and carry out broken processing, move in circles down in this way
It goes, it is ensured that solid fuel granularity controls within 1mm~3mm OK ranges.
In order to ensure solid fuel is crushed processing effect, following work should be carried out：
First, solid fuel will examine its moisture, and ensure coke powder or anchracite duff moisture before entering broken process
5%~8%, the upper limit is no more than 10% for control.
Second is that solid fuel select reach 90% than (part i.e. in solid fuel less than 1mm accounts for the ratio of total amount)~
95%.
The raw material that sinter production generally requires includes Iron Ore Powder, flux and coke powder or anthracite fines three categories.Sintering
The production procedure of mine is：By the Iron Ore Powders such as bloodstone, limonite and magnetic iron ore stock yard pre- proportioning room according to (40~
60%)：(5~40%)：(5~20%) are configured to neutralize material；To neutralize powder (proportioning 84~89%), flux (proportioning 6~
12%) and sintering solid fuel (proportioning 3~4%) is after sintered material, trommel mixer mix well granulation, passes through distributing device
Cloth is on pallet, and sinter mixture is through igniter fire, negative pressure down draft sintering to sintering end point, then single roller through tail is broken
It carries out being cooled to 100~150 DEG C into belt/circular cooler after broken crusher machine, finally by dying grain system, by finished belt
Transport blast furnace hopper.
The production of sinter is in addition to needing cost-effective various Iron Ore Powders, and in order to be provided to blast furnace, intensity is high, granularity is equal
The good sinter of even, stable components, metallurgical performance, in sinter production process, it is necessary to addition of 3%~4% solid fuel,
Such as coke powder, anchracite duff.Experiments have shown that the difference of solid fuel granularmetric composition, to sinter strength and its granularmetric composition
Influence is very big.If sinter produces, required solid fuel granularity is suitable, that is, the ratio for being less than 3mm reaches 75%~
85%, sinter strength can be improved, sinter granularmetric composition is improved, reduces sinter return rate under blast furnace, is burnt to reach to improve
Knot mine utilization rate, the purpose that pig iron cost is greatly lowered.
Beneficial effects of the present invention：
Experiments have shown that with the reduction for being less than the parts 1mm in coke powder, sintered ore rotary drum strength significantly improves, this illustrates to drop
Be conducive to raising sinter strength less than 1mm amount of powder in low coke powder.Ratio in coke powder less than 1mm reduces half, burns
The ratio reduction 3.51% that the ratio in mine less than 5mm reduces 3.48%, 5mm~10mm is tied, sinter average grain diameter increases
1.37mm, drum strength improve 1.05%；Ratio in coke powder less than 1mm is reduced to zero, i.e., is burnt entirely with the coke powder of 1mm or more
The ratio reduction 6.33% that the ratio in mine less than 5mm reduces by 7.9%, 5-10mm is tied, sinter average grain diameter increases 3.37mm,
Drum strength improve 2.71%. occur the reason of such case have two aspect：First, more coarse grained coke powder, burning time prolong
It is long, sintering high temperature band high temperature hold time can be made longer, be conducive to generation and the mineralizing process of sinter liquid phase, second is that relatively thick
Suitable coke powder particle, it is not easy to taken away by the flue gas under high negative pressure sintering condition, be conducive to carrying for whole bed of material combustion heat value
It is high.
By adding pneumatic separator in solid fuel crushing chamber, solid fuel granularmetric composition is optimized, sinter is improved
Intensity, yield rate and sintering usage factor, reduce sinter rate containing the powder ratio of 5mm (i.e. less than) 3~8% and 5~
The small grade sinter ratios 3~7% of 10mm improve sinter 1.3~3.3mm of average grain diameter to reach, reduce blast furnace back powder
The purpose of rate, sintering energy consumption and pig iron cost.
Description of the drawings：
Fig. 1 is the structural schematic diagram of solid fuel broken process
1 is the outlet of winnowing machine；2 be the outlet of winnowing machine；3 be the outlet of winnowing machine；4 be solid fuel feed bin；5 be spray
Blow tank；6 be four-roller crusher；7 be solid fuel hopper；8 be the entrance of winnowing machine；
Specific implementation mode：
The technical solution further illustrated the present invention below by specific embodiment, but be not limited with embodiment.
Embodiment 1：
A winnowing machine is added before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper 7
In solid fuel be sent into winnowing machine entrance 8, less than 1mm solid fuel (coke powder or anchracite duff) by being given after collection
Injecting tank of blast furnace 5 is used as injection coal；The fraction solids fuel of 1mm~3mm transports directly to proportioning room feed bin 4, and is more than
The part of 3mm is sent to four-roller crusher 6 and carries out broken processing, and solid fuel returns to winnowing machine after four-roller is broken and carries out granularity point
Grade, moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm~3mm in this way.
Application of the obtained solid fuel in the production technology of sinter：
(1) by the Iron Ore Powders such as bloodstone, limonite and magnetic iron ore stock yard pre- proportioning room according to 50%：35%：
15% is configured to neutralize material；
(2) heap is made in blending yard tiling, is being intercepted among the above with material heap using blending reclaimer after sealing heap, is passing through belt
Sintered material room is transported, in proportioning room is incited somebody to action and material, calcium lime powder and coke powder are respectively according to 86%：11%：3% is matched
Material；
(3) successively by a trommel mixer, secondary trommel mixer mixing and add water wetting granulation after, pass through belt
Mixture of sintering machine slot is transported, then is wired on trolley by multi-roller spreader, sinter mixture is taken out through igniter fire, negative pressure
Wind sinters to sintering end point, then carries out being cooled to 100 into belt/circular cooler after the single roll crusher of tail is broken
DEG C, finally by dying grain system, blast furnace hopper is transported by finished belt.
Embodiment 2
A winnowing machine is added before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper
In solid fuel be sent into winnowing machine entrance 8, less than 1mm solid fuel (coke powder or anchracite duff) by being given after collection
Injecting tank of blast furnace 5 is used as injection coal；The fraction solids fuel of 1mm~3mm transports directly to proportioning room feed bin 4, and is more than
The part of 3mm is sent to four-roller crusher 6 and carries out broken processing, and solid fuel returns to winnowing machine after four-roller is broken and carries out granularity point
Grade, moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm~3mm in this way.
Application of the obtained solid fuel in the production technology of sinter：
(1) by the Iron Ore Powders such as bloodstone, limonite and magnetic iron ore stock yard pre- proportioning room according to 60%：25%：
15% is configured to neutralize material；
(2) heap is made in blending yard tiling, is being intercepted among the above with material heap using blending reclaimer after sealing heap, is passing through belt
Sintered material room is transported, in proportioning room is incited somebody to action and material, light dolomite powder and anthracite are respectively according to 84%：12%：4%
Carry out dispensing；
(3) successively by a trommel mixer, secondary trommel mixer mixing and add water wetting granulation after, pass through belt
Mixture of sintering machine slot is transported, then is wired on trolley by multi-roller spreader, sinter mixture is taken out through igniter fire, negative pressure
Wind sinters to sintering end point, then carries out being cooled to 125 into belt/circular cooler after the single roll crusher of tail is broken
DEG C, finally by dying grain system, blast furnace hopper is transported by finished belt.
Embodiment 3：
A winnowing machine is added before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper
In solid fuel be sent into winnowing machine entrance 8, less than 1mm solid fuel (coke powder or anchracite duff) by being given after collection
Injecting tank of blast furnace 5 is used as injection coal；The fraction solids fuel of 1mm~3mm transports directly to proportioning room feed bin 4, and is more than
The part of 3mm is sent to four-roller crusher 6 and carries out broken processing, and solid fuel returns to winnowing machine after four-roller is broken and carries out granularity point
Grade, moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm~3mm in this way.
Application of the obtained solid fuel in the production technology of sinter：
(1) by the Iron Ore Powders such as bloodstone, limonite and magnetic iron ore stock yard pre- proportioning room according to 70%：20%：
10% is configured to neutralize material；
(2) heap is made in blending yard tiling, is being intercepted among the above with material heap using blending reclaimer after sealing heap, is passing through belt
Sintered material room is transported, is distinguished with material, calcium lime powder and light dolomite powder and coke powder and anthracite by in proportioning room
According to 86.5%：10%：3.5% carries out dispensing；
(3) successively by a trommel mixer, secondary trommel mixer mixing and add water wetting granulation after, pass through belt
Mixture of sintering machine slot is transported, then is wired on trolley by multi-roller spreader, sinter mixture is taken out through igniter fire, negative pressure
Wind sinters to sintering end point, then carries out 150 DEG C of cooling into belt/circular cooler after the single roll crusher of tail is broken,
Finally by dying grain system, blast furnace hopper is transported by finished belt.
Claims (8)
1. a kind of method improving solid fuel utilization rate, it is characterised in that：The solid fuel in hopper is sent into selection by winnowing first
Machine, solid fuel are coke powder or anchracite duff, and the solid fuel less than 1mm to blast furnace blowing process after collection by being used as spray
Blow coal use；The fraction solids fuel of 1mm~3mm transports directly to proportioning room feed bin, and the fraction solids fuel more than 3mm is sent
Broken processing is carried out to four-roller crusher, solid fuel returns to winnowing machine after four-roller is broken and carries out grading, less than 1mm's
Solid fuel is used by being used as injection coal to blast furnace blowing process after collection；The fraction solids fuel of 1mm~3mm directly transports
To proportioning room feed bin, and it is sent to four-roller crusher more than the fraction solids fuel of 3mm and carries out broken processing and move in circles down in this way
It goes, it is ensured that the solid fuel granularity in solid fuel feed bin controls within the scope of 1mm-3mm.
2. the method for improving solid fuel utilization rate as described in claim 1, it is characterised in that：The solid fuel into
Before entering broken process, its moisture is examined, it is ensured that solid fuel moisture≤10%.
3. the method for improving solid fuel utilization rate as claimed in claim 2, it is characterised in that：The solid fuel into
Before entering broken process, its moisture is examined, it is ensured that solid fuel aqueous to be divided into 5~8%.
4. the method for improving solid fuel utilization rate as described in claim 1, it is characterised in that：The solid fuel granularity
In part less than 1mm account for the ratio of total amount and to reach 5%~10%.
5. the method for improving solid fuel utilization rate as described in claim 1, it is characterised in that：The four-roller crusher (6)
The outlet (3) of winnowing machine is connected, the outlet (1) of winnowing machine connects solid fuel feed bin (4) by transporting equipment, and winnowing machine goes out
Mouth (2) connection injection tank (5), the solid fuel of solid fuel hopper enter the entrance of winnowing machine (8).
6. a kind of production method of sinter, it is characterised in that：(1) by bloodstone, limonite and magnetic iron ore Iron Ore Powder in raw material
The pre- proportioning room of field is according to (40~60%)：(5~40%)：(5~20%) are configured to neutralize material；
(2) in blending yard tiles and to be formed and material heap, seal after heap using blending reclaimer in being intercepted among the above with material heap and
Material will neutralize material and arrive sintered material room by belt-conveying, proportioning room will in and material, flux and as described in claim 1
Method generate 1-3mm solid fuels according to (84~89%)：(6~12%)：(3~4%) dispensing is carried out；
(3) mixture after dispensing passes through a trommel mixer, secondary trommel mixer mixing and adds water wetting granulation successively
Afterwards, by belt-conveying to mixture of sintering machine slot, then it is wired on trolley by multi-roller spreader, sinter mixture is through igniter
Igniting, negative pressure down draft sintering are to sintering end point, then enter belt/circular cooler after the single roll crusher of tail is broken and carry out
It is cooling, finally by dying grain system, blast furnace hopper is transported by finished belt.
7. the production method of sinter as claimed in claim 6, it is characterised in that：The flux is calcium lime powder or light-burned
At least one of dolomite dust.
8. the production method of sinter as claimed in claim 6, it is characterised in that：Sinter mixture enters belt or ring type
Cooler is cooled to 100~150 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610462068.0A CN106090978B (en) | 2016-06-23 | 2016-06-23 | A kind of method improving solid fuel utilization rate and its application in sinter production |
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| CN201610462068.0A CN106090978B (en) | 2016-06-23 | 2016-06-23 | A kind of method improving solid fuel utilization rate and its application in sinter production |
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| CN106090978B true CN106090978B (en) | 2018-07-31 |
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| CN111408440A (en) * | 2020-03-31 | 2020-07-14 | 湖南华菱湘潭钢铁有限公司 | Processing technology of coke powder for sintering |
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| CN101928824A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sinter production method for reducing sintering solid burnup and enhancing intensity |
| CN102417973A (en) * | 2011-11-14 | 2012-04-18 | 山西太钢不锈钢股份有限公司 | Addition process and system for sintering fuels |
| JP2012117082A (en) * | 2010-11-29 | 2012-06-21 | Jfe Steel Corp | Method for production of sintered ore |
| CN102719580A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Blast furnace operation method for improving hearth coke strength |
| CN202570326U (en) * | 2012-01-16 | 2012-12-05 | 尹彤 | Coal coke powder crushing and screening system |
| CN203540667U (en) * | 2013-09-10 | 2014-04-16 | 北大方正集团有限公司 | Coke granulation system |
| EP2438976B1 (en) * | 2006-03-10 | 2014-05-14 | C-Quest Technologies International LLC | Carbon dioxide sequestration materials and processes |
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2016
- 2016-06-23 CN CN201610462068.0A patent/CN106090978B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5395601A (en) * | 1991-04-09 | 1995-03-07 | Qi-Jiang Situ | Re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues |
| EP2438976B1 (en) * | 2006-03-10 | 2014-05-14 | C-Quest Technologies International LLC | Carbon dioxide sequestration materials and processes |
| CN101928824A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sinter production method for reducing sintering solid burnup and enhancing intensity |
| JP2012117082A (en) * | 2010-11-29 | 2012-06-21 | Jfe Steel Corp | Method for production of sintered ore |
| CN102719580A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Blast furnace operation method for improving hearth coke strength |
| CN102417973A (en) * | 2011-11-14 | 2012-04-18 | 山西太钢不锈钢股份有限公司 | Addition process and system for sintering fuels |
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| CN203540667U (en) * | 2013-09-10 | 2014-04-16 | 北大方正集团有限公司 | Coke granulation system |
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