CN106350665B - A kind of super thick bed of material sintering method using pre-sintering reducing sinter return fine rate - Google Patents
A kind of super thick bed of material sintering method using pre-sintering reducing sinter return fine rate Download PDFInfo
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- CN106350665B CN106350665B CN201610815800.8A CN201610815800A CN106350665B CN 106350665 B CN106350665 B CN 106350665B CN 201610815800 A CN201610815800 A CN 201610815800A CN 106350665 B CN106350665 B CN 106350665B
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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
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Abstract
The present invention discloses a kind of super thick bed of material sintering method using pre-sintering for reducing sinter return fine rate, the insulation cover of optimization firing temperature and configuration suitable number and the hot wind for being passed through high oxygen amount, the ignition quality of upper and lower level agglomerate surface can effectively be improved, the mineralising time for extending surface sinter, reduce the cold short phenomenon of sinter.And by Rational mixed coal to upper layer sinter mixture and water transfer, and the roller number of distributing device is reduced, so that upper layer sintered mixture ventilation is improved.Simultaneously according to the characteristic of upper layer mixture, it is suppressed that the segregation of bed of material fuel and granularity, it is too fast to be unlikely to bed of material burning, by comprehensive technical measures, upper layer sinter and the rate of return mine of entire sinter bed can be made to be effectively reduced.
Description
Technical field
The present invention relates to the sintering production methods of iron ore, and it is pre- to especially relate to a kind of use for reducing sinter return fine rate
The super thick bed of material sintering method of sintering.
Background technique
In ironmaking production, the rate of return mine is an important production target, has directly reacted the production status of sintering.It returns mine
Rate is low, and production status is good, and Sintering Yield is high, high-quality.The rate of return mine is high, and production status is poor, and Sintering Yield is low, of poor quality.
In current conventional sintering production, for the rate of return mine for reducing sinter, the measure mainly taken has: (1) optimizing
Ore matching improves sintered ore rotary drum strength；(2) bed of material ferrous content is improved, improves sintering strength to a certain extent；(3) it reduces and burns
Air leak rate of air curtain is tied, bed permeability is improved；(4) technological parameter stability is improved, technical management is reinforced；(5) thickness of feed layer, drop are improved
The low rate of return mine.Wherein by Optimization Ore Matching, ferrous content is improved, reducing air leak rate of air curtain etc. is all usual method, can also be played certain
Effect.And pass through a large number of studies show that, improve thickness of feed layer, be to reduce the rate of return mine, improve having for Sintering Yield and quality
Efficacious prescriptions method.
But under conditions of sintering area is constant, the thickness of feed layer of sintering machine be also not can without limitation improve, by
Equipment scale, exhaust fan ability, material condition, many factors such as sinter quality restrict.Once some researches show that only leaned on both at home and abroad
The thickness of feed layer of simple raising sinter mixture is reached a certain level without taking corresponding technological measure in thickness of feed layer
Afterwards, the production capacity and quality of sintering machine all can sharply decline, and lose more than gain.So current sintering material layer thickness is being adopted both at home and abroad
It takes under various technical measures, generally also only in 800mm or so, and is sintered into global metallurgy more than the 900mm super thick bed of material
Problem.
So to reduce the rate of return mine of sinter in terms of improving thickness of feed layer, it is necessary to take innovative method, ability
It tackles the problem at its root.
Summary of the invention
The technical problem to be solved by the present invention is to improve the yield and quality of sinter to reduce sinter return fine rate,
The present invention is by adjusting firing temperature, according to pre-sintering process practical condition, reasonable disposition insulation cover quantity, Optimized Coal Blending
And water distribution, the segregation of the upper layer bed of material is carried out a series of measures such as inhibiting, the rate of return mine of upper layer sinter can be effectively reduced,
And total rate of return mine of sinter is reduced simultaneously.
Object of the present invention is to what is realized by following technical solution:
A kind of super thick bed of material sintering method using pre-sintering reducing sinter return fine rate, which is characterized in that in sintering belt
First and second mixing distributing device and No. first and second igniter are configured on formula burning machine；Entire sintering production uses a set of exhausting
System；Cloth for the first time is first carried out, after bottom material distributing device grate-layer material, then passes through mixture distributor device cloth sinter mixture, point
Knot is burnt, after pre-sintering, carries out second of cloth sinter mixture in cloth layer surface for the first time, sintering suction pressure is kept not
Become, ignition sintering carried out to second bed of cloth, when second of bed of cloth completes igniting, for the first time the mixture of bed of cloth into
Row sintering, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time；Fabric thickness is in 600- for the first time
900mm, firing temperature control at 1150-1250 DEG C, configure 2-4 insulation cover after firing, be passed through oxygen volume in insulation cover
Percentage composition is 17%-21%, the hot wind that temperature is 120-250 DEG C；The sinter mixture of second of cloth enters individually special
The coal mixer of setting carries out second of mixing cloth after fuel and water is added again in coal mixer again, at this time sinter mixture
Moisture weight percentage is 7.6%-7.9%, and the weight percent phosphorus content of sinter mixture when first time cloth than mixing
The phosphorus content of material is 0.05-0.15 percentage points high, is 1.9%~2.8%；After sinter mixture is pre-sintered 8-40min, for the first time
Cloth layer surface carries out second of cloth sinter mixture, and for second of cloth in such a way that mud roller adds multi-roller spreader, cloth is thick
Degree carries out second of ignition sintering in 200-650mm, and firing temperature control configures 4-7 guarantor after 1210-1310 DEG C, igniting
Temperature cover, being passed through oxygen volumn concentration in insulation cover is 17%-21%, and temperature is 120-250 DEG C of hot wind, for the first time bed of cloth
The sum of thickness and second of bed of cloth thickness >=950mm.
In second of cloth, the roller number of multi-roller spreader wants≤6.
It is verified by industrial production, optimize firing temperature and configures the insulation cover of suitable number and be passed through the heat of high oxygen amount
Wind can effectively improve the ignition quality of upper and lower level agglomerate surface, extend the mineralising time of surface sinter, reduce sintering
The cold short phenomenon of mine.And by Rational mixed coal to upper layer sinter mixture and water transfer, and the roller number of distributing device is reduced, make
Layer sintered mixture ventilation improves.Simultaneously according to the characteristic of upper layer mixture, it is suppressed that the segregation of bed of material fuel and granularity, no
It burns as the bed of material too fast, by comprehensive technical measures, the rate of return mine of upper layer sinter and entire sinter bed can be made
It is effectively reduced.
Detailed description of the invention
Fig. 1 is the present invention using the super thick bed of material sintering method process flow chart being pre-sintered；
Wherein 1 mixture distributor device a, 2 be igniter a, and 3 be bed of cloth for the first time, and 4 be mixture distributor device b, and 5 be igniting
Device b, 6 be second of bed of cloth, and 7 be insulation cover a after primary igniting, and 8 be insulation cover b after regnition.
Specific embodiment
It is illustrated combined with specific embodiments below:
Embodiment 1:
Concrete technology flow process of the invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and igniter 1
On plinth, then a set of mixture distributor device 2 and igniter 2 are added, entire sintering production uses a set of exhausting system, first carries out for the first time
Cloth, the coke powder that fabric thickness is 2.7% containing weight percent in 700mm, mixture for the first time, water content 7.2%, point
Fiery temperature control configures 2 insulation covers at 1150 DEG C after firing, and being passed through oxygen volumn concentration in insulation cover is 18%,
The hot wind that temperature is 120 DEG C；
Sinter mixture for second cloth enters the coal mixer being separately provided, added in coal mixer fuel and
Enter second of cloth system after water, the moisture weight percentage of sinter mixture is 7.6% at this time, the weight percent of coke powder
It is 2.75%, after lower layer's sinter mixture is sintered 10min in advance, carries out second of cloth sintering on the surface of bed of cloth 3 for the first time
Mixture, in such a way that mud roller adds 5 roller distributing devices, fabric thickness is sintered suction pressure and keeps not second of cloth in 250mm
Become, carry out second of ignition sintering, firing temperature controls at 1310 DEG C, 4 insulation covers are configured after igniting, are passed through oxygen in insulation cover
Air volume percentage composition is 19%, the hot wind that temperature is 150 DEG C, for the first time the thickness of the thickness of bed of cloth 3 and second of bed of cloth 6
The sum of 950mm, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time.
It is main to produce result such as table 1 under this technique
Table 1 produces Comparative result
| Total rate of return mine % | Upper layer small sintering ore rate % | |
| Normal sintering | 25.5 | 28.1 |
| After the present invention | 23.2 | 24.7 |
Known by creation data in table 1, after using the present invention, not only the rate of return mine of upper layer sinter is by 28.1% decline
To 24.7%, total rate of return mine also has decreased to 23.2% by 25.5%.
Embodiment 2:
Concrete technology flow process of the invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and igniter 1
On plinth, then a set of mixture distributor device 2 and igniter 2 are added, entire sintering production uses a set of exhausting system, first carries out for the first time
Cloth, the coke powder that fabric thickness is 2.4% containing weight percent in 800mm, mixture for the first time, water content 7.1%, point
Fiery temperature control configures 3 insulation covers at 1200 DEG C after firing, and being passed through oxygen volumn concentration in insulation cover is 19%,
The hot wind that temperature is 150 DEG C；
Sinter mixture for second cloth enters the coal mixer being separately provided, added in coal mixer fuel and
Enter second of cloth system after water, the moisture weight percentage of sinter mixture is 7.8% at this time, the weight percent of coke powder
It is 2.5%, after lower layer's sinter mixture is sintered 15min in advance, it is mixed carries out second of cloth sintering on the surface of bed of cloth 3 for the first time
Material is closed, in such a way that mud roller adds 6 roller distributing devices, fabric thickness is sintered suction pressure and keeps not second of cloth in 250mm
Become, carry out second of ignition sintering, firing temperature controls at 1260 DEG C, 5 insulation covers are configured after igniting, are passed through oxygen in insulation cover
Air volume percentage composition is 20%, the hot wind that temperature is 200 DEG C, for the first time the thickness of the thickness of bed of cloth 3 and second of bed of cloth 6
The sum of 1050mm, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time.
It is main to produce result such as table 2 under this technique
Table 2 produces Comparative result
| Total rate of return mine % | Upper layer small sintering ore rate % | |
| Benchmark | 23.2 | 25.7 |
| After the present invention | 18.9 | 21.4 |
Known by creation data in table 2, after using the present invention, not only the rate of return mine of upper layer sinter is by 25.7% decline
To 21.4%, total rate of return mine also has decreased to 18.9% by 23.2%.
Embodiment 3:
Concrete technology flow process of the invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and igniter 1
On plinth, then a set of mixture distributor device 2 and igniter 2 are added, entire sintering production uses a set of exhausting system, first carries out for the first time
Cloth, the coke powder that fabric thickness is 2.4% containing weight percent in 850mm, mixture for the first time, water content 7.3%, point
Fiery temperature control configures 4 insulation covers at 1250 DEG C after firing, and being passed through oxygen volumn concentration in insulation cover is 20%,
The hot wind that temperature is 200 DEG C；
Sinter mixture for second cloth enters the coal mixer being separately provided, added in coal mixer fuel and
Enter second of cloth system after water, the moisture weight percentage of sinter mixture is 7.9% at this time, the weight percent of coke powder
It is 2.55%, after lower layer's sinter mixture is sintered 15min in advance, carries out second of cloth sintering on the surface of bed of cloth 3 for the first time
Mixture, in such a way that mud roller adds 5 roller distributing devices, fabric thickness is sintered suction pressure and keeps not second of cloth in 300mm
Become, carry out second of ignition sintering, firing temperature controls at 1210 DEG C, 6 insulation covers are configured after igniting, are passed through oxygen in insulation cover
Air volume percentage composition is 21%, the hot wind that temperature is 250 DEG C, for the first time the thickness of the thickness of bed of cloth 3 and second of bed of cloth 6
The sum of 1150mm, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time.
It is main to produce result such as table 3 under this technique
Table 3 produces Comparative result
| Total rate of return mine % | Upper layer small sintering ore rate % | |
| Benchmark | 23.4 | 24.7 |
| After the present invention | 18.2 | 20.5 |
Known by creation data in table 3, after using the present invention, not only the rate of return mine of upper layer sinter is by 24.7% decline
To 20.5%, total rate of return mine also has decreased to 18.2% by 23.4%.
Claims (2)
1. a kind of super thick bed of material sintering method using pre-sintering for reducing sinter return fine rate, which is characterized in that in sintering belt
First and second mixing distributing device and No. first and second igniter are configured on burning machine；Entire sintering production uses a set of exhausting system
System；Cloth for the first time is first carried out, after bottom material distributing device grate-layer material, then passes through mixture distributor device cloth sinter mixture, igniting
Sintering carries out second of cloth sinter mixture in cloth layer surface for the first time after pre-sintering, and sintering suction pressure remains unchanged,
Ignition sintering is carried out to second of bed of cloth, when second of bed of cloth completes igniting, the mixture of bed of cloth is being carried out for the first time
Sintering, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time；Fabric thickness is in 600- for the first time
900mm, firing temperature control at 1150-1250 DEG C, configure 2-4 insulation cover after firing, be passed through oxygen volume in insulation cover
Percentage composition is 17%-21%, the hot wind that temperature is 120-250 DEG C；The sinter mixture of second of cloth enters individually special
The coal mixer of setting carries out second of mixing cloth after fuel and water is added again in coal mixer again, at this time sinter mixture
Moisture weight percentage is 7.6%-7.9%, and the weight percent phosphorus content of sinter mixture when first time cloth than mixing
The phosphorus content of material is 0.05-0.15 percentage points high, is 1.9%~2.8%；After sinter mixture is pre-sintered 8-40min, for the first time
Cloth layer surface carries out second of cloth sinter mixture, and for second of cloth in such a way that mud roller adds multi-roller spreader, cloth is thick
Degree carries out second of ignition sintering in 200-650mm, and firing temperature control configures 4-7 guarantor after 1210-1310 DEG C, igniting
Temperature cover, being passed through oxygen volumn concentration in insulation cover is 17%-21%, and temperature is 120-250 DEG C of hot wind, for the first time bed of cloth
The sum of thickness and second of bed of cloth thickness >=950mm.
2. a kind of super thick bed of material sintering method using pre-sintering for reducing sinter return fine rate according to claim 1,
It is characterized in that, in second of cloth, the roller number of multi-roller spreader wants≤6.
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| CN108330275B (en) * | 2018-02-13 | 2019-08-06 | 鞍钢股份有限公司 | A kind of super thick bed of material oxygen-enriched sintering production method |
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| CN111826517B (en) * | 2020-07-12 | 2022-03-22 | 首钢集团有限公司 | Super-thick material layer sintering material, sintering method and sintering ore |
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