CN106090978A - A kind of method improving solid fuel utilization ratio and the application in the production technology of sintering deposit thereof - Google Patents
A kind of method improving solid fuel utilization ratio and the application in the production technology of sintering deposit thereof Download PDFInfo
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- CN106090978A CN106090978A CN201610462068.0A CN201610462068A CN106090978A CN 106090978 A CN106090978 A CN 106090978A CN 201610462068 A CN201610462068 A CN 201610462068A CN 106090978 A CN106090978 A CN 106090978A
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- Prior art keywords
- solid fuel
- sintering
- utilization ratio
- winnower
- method improving
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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 work flow: crush manufacturing procedure at solid fuel and set up a solid fuel pneumatic separator, solid fuel less than 1.0mm is elected, transports to blast furnace operation and use as pulverized coal injection into blast furna；Such solid fuel crushes processing technique, and one is to improve sintering solid fuel granularmetric composition, can improve sintered ore rotary drum strength and mean diameter, reduces blast furnace sinter return rate；Two be selecting crude drugs with winnower out less than 1mm solid fuel for blast furnace blowing, it is achieved that make the best use of everything, substantially increase the utilization ratio of solid fuel.
Description
Technical field
The present invention relates to metallurgy sintered field, particularly relate in sintering production process, crush by improving solid fuel
Technique, optimizes sintering solid fuel granularity, thus reaches to improve sintering deposit granularmetric composition, improves the one of sintering deposit mean diameter
Energy-efficient new method.
Background technology
Iron and steel enterprise, in order to constantly reduce pig iron cost, is improving constantly the scaling loss such as limonite/siderite the most always
The ratio of big Iron Ore Powder；But along with the rising of scaling loss bigger iron ore ratio and its quality bad in raw materials for sintering structure
Changing, sinter strength presents the trend of reduction, is embodied in: sintering deposit granularity diminishes, and mean diameter, in the trend that progressively diminishes, causes
Under blast furnace, the ore deposit that partially sinters of a large amount of 5-10mm is sifted out and is become the outer back powder of blast furnace, and due to 5-10mm sintering deposit ratio
Raise, also affect the direct motion steady in a long-term of the working of a furnace to a certain extent.
The sintering deposit of sintering regional production arrives blast furnace through repeatedly having bad luck transport, is not only less than the ratio of 5mm in sintering deposit
Raise, and the ratio of 5-10mm grade increases considerably；Under the blast furnace plus most domestic iron and steel enterprise
Sintering deposit screening plant is all that efficiently rod sieves, and after rod sieve screening, particularly rod sieve closes on the later stage being in the life-span, has sieved rod
Abrasion, powder not being only smaller than 5mm is screened out, and the ore deposit that partially sinters more than 5mm is also screened out in entrance back powder, causes height
Under stove groove, sinter return rate raises；This phenomenon generally exists in iron and steel enterprise, and these " back powders " are had bad luck to stock yard and stored
After re-sinter, not only cause expense of having bad luck to raise, and cause the sintering waste of the energy and the rising of pig iron cost, greatly reduce
The economic benefit of enterprise, is iron and steel enterprise's problem in urgent need to solve.
Summary of the invention
The present invention is achieved by the following measures:
Before the four-roller crusher of fuel crushing room, increase a typhoon optional equipment (i.e. winnower), solid fuel will be less than 1mm
Solid fuel elect, then collected by cleaner unit, transport to blast furnace operation and use as pulverized coal injection into blast furna；Granularity
For 1mm ~ 3mm solid fuel by Belt Conveying to solid fuel feed bin, the ratio according to 3% ~ 4% carries out dispensing to produce burning
Knot ore deposit；It addition, the part more than 3mm delivers to four-roller crusher carries out broken processing, then the solid fuel crushed is returned again
Returning winnower and carry out grading, the solid fuel less than 1mm send blast furnace operation, and the solid fuel of 1mm ~ 3mm send proportioning room solid
Fluid fuel feed bin, the part more than 3mm returns to four-roller crusher and carries out broken processing, so moves in circles down, it is ensured that
Solid fuel Task-size Controlling is within 1mm ~ 3mm OK range.
Crush processing effect in order to ensure solid fuel, should carry out and work as follows:
One is solid fuel before entering broken process, will check its moisture, and guarantee coke powder or anchracite duff moisture Control
5% ~ 8%, the upper limit is less than 10%.
Two be solid fuel select to reach 90% than (solid fuel i.e. accounts for the ratio of total amount less than the part of 1mm) ~
95%。
Sintering deposit produce it is generally required to raw material include Iron Ore Powder, flux and coke powder or anthracite fines three major types.Sintering
The production procedure in ore deposit is: by Iron Ore Powder such as bloodstone, limonite and magnetic iron ores in the pre-proportioning room of stock yard according to (40 ~ 60%):
(5 ~ 40%): (5 ~ 20%) are configured to neutralize material；Powder (proportioning 84 ~ 89%), flux (proportioning 6 ~ 12%) and sintering solid combustion will be neutralized
After material (proportioning 3 ~ 4%) sintered dispensing, the abundant mixed pelletization of trommel mixer, by distributing device cloth on pallet, sintering
Compound through igniter fire, negative pressure down draft sintering to sintering end point, then enter after the single roll crusher of tail is broken belt/
Circular cooler carries out being cooled to 100 ~ 150 DEG C, finally by dying grain system, finished belt transports blast furnace hopper.
Producing in addition to needing the various Iron Ore Powder that cost performance is high of sintering deposit, in order to provide to blast furnace, intensity is high, granularity is equal
Sintering deposit even, that stable components, metallurgical performance are good, in sintering deposit production process, it is necessary to addition of 3% ~ 4% solid fuel, as
Coke powder, anchracite duff etc..Test shows, the difference of solid fuel granularmetric composition, to sinter strength and the shadow of granularmetric composition thereof
Sound is the biggest.If the solid fuel granularity required for sintering deposit production is suitable, i.e. the ratio less than 3mm reaches 75% ~ 85%,
Sinter strength can be improved, improve sintering deposit granularmetric composition, reduce sinter return rate under blast furnace, thus reach to improve sintering deposit profit
By rate, purpose that pig iron cost is greatly lowered.
Beneficial effects of the present invention:
Test shows, along with being less than 1mm minimizing partly in coke powder, sintered ore rotary drum strength significantly improves, and this explanation reduces Jiao
Powder is conducive to improving sinter strength less than 1mm amount of powder.In coke powder, the ratio less than 1mm reduces half, sintering deposit
In ratio less than 5mm reduce 3.48%, the ratio of 5mm～10mm reduces 3.51%, and sintering deposit mean diameter increases 1.37mm, turns
Drum intensity improves 1.05%；In coke powder, the ratio less than 1mm is reduced to zero, and the coke powder of the most complete more than 1mm is less than in sintering deposit
The ratio of 5mm reduces 7.9%, and the ratio of 5-10mm reduces 6.33%, and sintering deposit mean diameter increases 3.37mm, and drum strength improves
2.71%. occurring that the reason of this situation has two aspects: one is more coarse grained coke powder, its burning time extends, and sintering can be made high
Temperate zone high temperature hold time is longer, beneficially the generation of sintering deposit liquid phase and mineralizing process, and two is the most a little suitable coke powders
Grain, it is not easy to taken away by the flue gas under high negative pressure sintering condition, beneficially the raising of monolith layer combustion heat value.
By setting up pneumatic separator at solid fuel crushing chamber, optimize solid fuel granularmetric composition, improve sintering deposit
Intensity, yield rate and sintering usage factor, reduce sintering deposit (i.e. ratio less than 5mm) 3 ~ 8% and 5 ~ 10mm containing powder rate little
Grade sintering deposit ratio 3 ~ 7%, thus reach to improve sintering deposit mean diameter 1.3 ~ 3.3mm, reduce blast furnace sinter return rate, sintering energy
Consumption and the purpose of pig iron cost.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of solid fuel broken process
1 is the outlet of winnower；2 is the outlet of winnower；3 is the outlet of winnower；4 is solid fuel feed bin；5 is winding-up
Tank；6 is four-roller crusher；7 is solid fuel hopper；8 is the entrance of winnower；
Detailed description of the invention:
Further illustrate technical scheme below by specific embodiment, but be not limited with embodiment.
Embodiment 1:
A winnower was set up before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper 7
The entrance 8 of winnower sent into by solid fuel, and the solid fuel (coke powder or anchracite duff) less than 1mm is by giving blast furnace after collecting
Winding-up tank 5 uses as injection coal；The fraction solids fuel of 1mm ~ 3mm transports directly to proportioning room feed bin 4, and more than 3mm's
Part is delivered to four-roller crusher 6 and is carried out broken processing, and solid fuel returns winnower after four rollers are broken and carries out grading, this
Sample moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm ~ 3mm.
The application in the production technology of sintering deposit of the obtained solid fuel:
(1) Iron Ore Powder such as bloodstone, limonite and magnetic iron ore are configured to according to 50%:35%:15% in the pre-proportioning room of stock yard
Neutralize material；
(2) make heap in blending yard tiling, use blending reclaimer to intercept at above-mentioned neutralization stockpile after envelope heap, pass through belt-conveying
To sintered material room, in proportioning room, neutralization material, calcium lime powder and coke powder are carried out dispensing according to 86%:11%:3% respectively；
(3) sequentially pass through trommel mixer, secondary trommel mixer mixes and adds after water-wet pelletizes, and passes through belt-conveying
To mixture of sintering machine groove, then by multi-roller spreader cloth to chassis, sinter mixture burns through igniter fire, negative pressure convulsion
Tie to sintering end point, then entrance belt/circular cooler carries out being cooled to 100 DEG C after the single roll crusher of tail is broken,
Afterwards by dying grain system, finished belt transport blast furnace hopper.
Embodiment 2
A winnower was set up before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper
The entrance 8 of winnower sent into by solid fuel, and the solid fuel (coke powder or anchracite duff) less than 1mm is by giving blast furnace after collecting
Winding-up tank 5 uses as injection coal；The fraction solids fuel of 1mm ~ 3mm transports directly to proportioning room feed bin 4, and more than 3mm's
Part is delivered to four-roller crusher 6 and is carried out broken processing, and solid fuel returns winnower after four rollers are broken and carries out grading, this
Sample moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm ~ 3mm.
The application in the production technology of sintering deposit of the obtained solid fuel:
(1) Iron Ore Powder such as bloodstone, limonite and magnetic iron ore are prepared according to 60%:25%:15% in the pre-proportioning room of stock yard
Become to neutralize material；
(2) make heap in blending yard tiling, use blending reclaimer to intercept at above-mentioned neutralization stockpile after envelope heap, pass through belt-conveying
To sintered material room, in proportioning room, neutralization material, light dolomite powder and anthracite are carried out according to 84%:12%:4% respectively
Dispensing；
(3) sequentially pass through trommel mixer, secondary trommel mixer mixes and adds after water-wet pelletizes, and passes through belt-conveying
To mixture of sintering machine groove, then by multi-roller spreader cloth to chassis, sinter mixture burns through igniter fire, negative pressure convulsion
Tie to sintering end point, then entrance belt/circular cooler carries out being cooled to 125 DEG C after the single roll crusher of tail is broken,
Afterwards by dying grain system, finished belt transport blast furnace hopper.
Embodiment 3:
A winnower was set up before sintering solid fuel crushing chamber four-roller crusher 6.First by solid fuel hopper
The entrance 8 of winnower sent into by solid fuel, and the solid fuel (coke powder or anchracite duff) less than 1mm is by giving blast furnace after collecting
Winding-up tank 5 uses as injection coal；The fraction solids fuel of 1mm ~ 3mm transports directly to proportioning room feed bin 4, and more than 3mm's
Part is delivered to four-roller crusher 6 and is carried out broken processing, and solid fuel returns winnower after four rollers are broken and carries out grading, this
Sample moves in circles down, it is ensured that solid fuel granularity all controls within the OK range of 1mm ~ 3mm.
The application in the production technology of sintering deposit of the obtained solid fuel:
(1) Iron Ore Powder such as bloodstone, limonite and magnetic iron ore are prepared according to 70%:20%:10% in the pre-proportioning room of stock yard
Become to neutralize material；
(2) make heap in blending yard tiling, use blending reclaimer to intercept at above-mentioned neutralization stockpile after envelope heap, pass through belt-conveying
To sintered material room, in proportioning room, neutralization is expected, calcium lime powder and light dolomite powder and coke powder and anthracite respectively according to
86.5%:10%:3.5% carries out dispensing；
(3) sequentially pass through trommel mixer, secondary trommel mixer mixes and adds after water-wet pelletizes, and passes through belt-conveying
To mixture of sintering machine groove, then by multi-roller spreader cloth to chassis, sinter mixture burns through igniter fire, negative pressure convulsion
Tie to sintering end point, then entrance belt/circular cooler carries out cooling down 150 DEG C, finally after the single roll crusher of tail is broken
By dying grain system, finished belt transport blast furnace hopper.
Claims (10)
1. the method improving sintering solid fuel utilization ratio, it is characterised in that: first the solid fuel in hopper is sent
Entering winnower, the solid fuel (coke powder or anchracite duff) less than 1mm is by giving blast furnace blowing operation as winding-up after collecting
Coal uses；The fraction solids fuel of 1mm ~ 3mm transports directly to proportioning room feed bin, and the part more than 3mm is delivered to four rollers and crushed
Machine carries out broken processing, and solid fuel returns winnower after four rollers are broken and carries out grading, less than the solid fuel of 1mm
(coke powder or anchracite duff) uses as injection coal by giving blast furnace blowing operation after collecting；The fraction solids combustion of 1mm ~ 3mm
Material transports directly to proportioning room feed bin, and the part more than 3mm is delivered to four-roller crusher and carried out broken processing and so move in circles
Go down.
2. the method improving sintering solid fuel utilization ratio as claimed in claim 1, it is characterised in that: described solid combustion
Expect, before entering broken process, its moisture to be checked, it is ensured that solid fuel moisture≤10%.
3. the method improving sintering solid fuel utilization ratio as claimed in claim 2, it is characterised in that: described solid combustion
Expect entering before broken process, its moisture to be checked, it is ensured that solid fuel aqueous be divided into 5 ~ 8%.
4. the method improving sintering solid fuel utilization ratio as claimed in claim 1, it is characterised in that: described solid combustion
Material granularity accounts for the ratio of total amount less than the part of 1mm and to reach 5% ~ 10%.
5. the method improving sintering solid fuel utilization ratio as claimed in claim 1, it is characterised in that: described solid combustion
In material granularity, the ratio of 1 ~ 3mm accounts for the 90 ~ 95% of total amount.
6. the method improving sintering solid fuel utilization ratio as claimed in claim 1, it is characterised in that: described four rollers crush
Machine (6) connects the outlet (3) of winnower, and the outlet (1) of described winnower connects solid fuel feed bin (4) by transporting equipment,
The outlet (2) of described winnower connects winding-up tank (5),
The solid fuel of solid fuel hopper enters the entrance (8) of winnower.
7. the obtained solid fuel utilizing the method improving sintering solid fuel utilization ratio as claimed in claim 1 exists
Application in the production technology of sintering deposit, it is characterised in that:
(1) by Iron Ore Powder such as bloodstone, limonite and magnetic iron ores in the pre-proportioning room of stock yard according to (40 ~ 60%): (5 ~ 40%):
(5 ~ 20%) are configured to neutralize material；
(2) make heap in blending yard tiling, use blending reclaimer to intercept at above-mentioned neutralization stockpile after envelope heap, pass through belt-conveying
To sintered material room, in proportioning room by neutralization material, flux and solid fuel according to (84 ~ 89%): (6 ~ 12%): (3 ~ 4%) are carried out
Dispensing；
(3) sequentially pass through trommel mixer, secondary trommel mixer mixes and adds after water-wet pelletizes, and passes through belt-conveying
To mixture of sintering machine groove, then by multi-roller spreader cloth to chassis, sinter mixture burns through igniter fire, negative pressure convulsion
Tie to sintering end point, then entrance belt/circular cooler cools down, finally by whole after the single roll crusher of tail is broken
Grain system, is transported blast furnace hopper by finished belt.
8. solid fuel application in the production technology of sintering deposit as claimed in claim 7, it is characterised in that: described is molten
Agent is at least one of calcium lime powder or light dolomite powder.
9. solid fuel application in the production technology of sintering deposit as claimed in claim 7, it is characterised in that: described consolidates
Fluid fuel be coke powder or anthracitic at least one.
10. solid fuel application in the production technology of sintering deposit as claimed in claim 7, it is characterised in that: described
In cooling technique, enter belt or circular cooler carries out being cooled to 100 ~ 150 DEG C.
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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 CN106090978B (en) | 2018-07-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| 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 |
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