CN106350665A - Ultra-thick material layer sintering method adopting presintering and capable of reducing sintering return ore rate - Google Patents
Ultra-thick material layer sintering method adopting presintering and capable of reducing sintering return ore rate Download PDFInfo
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- CN106350665A CN106350665A CN201610815800.8A CN201610815800A CN106350665A CN 106350665 A CN106350665 A CN 106350665A CN 201610815800 A CN201610815800 A CN 201610815800A CN 106350665 A CN106350665 A CN 106350665A
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- 238000005245 sintering Methods 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 41
- 239000003245 coal Substances 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims description 78
- 238000009413 insulation Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 206010010904 Convulsion Diseases 0.000 claims description 2
- 230000036461 convulsion Effects 0.000 claims description 2
- 238000005204 segregation Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 230000033558 biomineral tissue development Effects 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a presintering ultra-thick material layer sintering method for reducing the sintering return ore rate, which optimizes the ignition temperature, configures a proper number of heat preservation covers and introduces hot air with high oxygen content, can effectively improve the ignition quality of the surfaces of upper and lower layers of sintered ores, prolongs the mineralization time of the surface sintered ores and reduces the cold brittleness phenomenon of the sintered ores. And the air permeability of the upper layer sintering mixture is improved by reasonably distributing coal and water for the upper layer sintering mixture and reducing the roller number of the distributing device. Meanwhile, according to the characteristics of the mixture of the upper layer, segregation of fuel and granularity of the material layer is inhibited, the material layer is prevented from burning too fast, and the return ore rate of the upper-layer sinter ore and the whole sinter bed can be effectively reduced through comprehensive technical measures.
Description
Technical field
The present invention relates to the sintering production method of iron ore, especially relate to a kind of employing reducing sinter return fine rate in advance
The super thick bed of material sintering method of sintering.
Background technology
In ironmaking production, the rate of return mine is an important production target, the production status of direct reaction sintering.Return mine
Rate is low, and production status is good, and Sintering Yield is high, and quality is good.The rate of return mine is high, and production status is poor, and Sintering Yield is low, of poor quality.
In SINTERING PRODUCTION conventional at present, for reducing the rate of return mine of sintering deposit, the measure mainly taken has: (1) optimizes
Join ore deposit, improve sintered ore rotary drum strength；(2) improve bed of material ferrous content, improve sintering strength to a certain extent；(3) reduce and burn
Knot air leak rate of air curtain, improves bed permeability；(4) improve technological parameter stability, strengthen technical management；(5) thickness of feed layer, fall are improved
The low rate of return mine.Wherein pass through Optimization Ore Matching, improve ferrous content, reducing air leak rate of air curtain etc. is all usual method, also can play certain
Effect.And shown by numerous studies, improve thickness of feed layer, be to reduce the rate of return mine, improve having of Sintering Yield and quality
Efficacious prescriptions method.
But under conditions of sintering area is constant, the thickness of feed layer of sintering machine is not unrestrictedly to improve, and it is subject to
Equipment scale, air exhauster ability, material condition, the many factors such as sinter quality restrict.Once there are some researches show both at home and abroad, only leaned on
The thickness of feed layer of simple raising sinter mixture, and do not take corresponding technological measure, reach to a certain degree in thickness of feed layer
Afterwards, the production capacity of sintering machine and quality all can drastically decline, and lose more than gain.So, current sintering material layer thickness is being adopted both at home and abroad
Take under various technical measures, generally also only in 800mm, and be sintered into global metallurgy more than the 900mm super thick bed of material
A difficult problem.
So the rate of return mine of sintering deposit will be reduced in terms of improving thickness of feed layer it is necessary to the method for taking novelty, ability
Tackle the problem at its root.
Content of the invention
The technical problem to be solved is to reduce sinter return fine rate, improving yield and the quality of sintering deposit,
The present invention passes through to adjust firing temperature, according to pre-sintering process practical condition, reasonable disposition thermal insulation cover quantity, Optimized Coal Blending
And water distribution, the segregation to the upper strata bed of material carries out the series of measures such as suppressing, and can effectively reduce the rate of return mine of upper strata sintering deposit,
And reduce total rate of return mine of sintering deposit simultaneously.
The present invention seeks to realized by techniques below scheme:
A kind of super thick bed of material sintering method of the employing presintering reducing sinter return fine rate is it is characterised in that in sintering belt
First and second mixing distributing device and No. first and second lighter are configured with formula burning machine；Whole SINTERING PRODUCTION adopts a set of convulsion
System；First carry out cloth first, after bed material distributing device grate-layer material, then pass through mixture distributor device cloth sinter mixture, point
Burn knot, after presintering, carry out second cloth sinter mixture in cloth layer surface first, sintering suction pressure keeps not
Become, igniting sintering is carried out to second bed of cloth, when second bed of cloth completes igniting, the compound of bed of cloth enters first
Row sintering, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first；Fabric thickness is in 600- first
900mm, firing temperature controls at 1150-1250 DEG C, configures 2-4 thermal insulation cover after firing, is passed through oxygen volume in thermal insulation cover
Percentage composition is 17%-21%, and temperature is 120-250 DEG C of hot blast；The sinter mixture of second cloth enters individually special
The coal mixer of setting, carry out second mixing cloth after again adding fuel and water in coal mixer again, now sinter mixture
Moisture weight percentage ratio is 7.6%-7.9%, and the percentage by weight phosphorus content of sinter mixture mixes than during first time cloth
The phosphorus content of material is high 0.05-0.15 percentage point, is 1.9%～2.8%；After sinter mixture presintering 8-40min, first
Cloth layer surface carries out second cloth sinter mixture, and, by the way of mud roller adds multi-roller spreader, cloth is thick for second cloth
Degree, in 200-650mm, carries out second igniting sintering, firing temperature controls at 1210-1310 DEG C, 4-7 guarantor of configuration after igniting
Temperature cover, being passed through oxygen volumn concentration in thermal insulation cover is 17%-21%, and temperature is 120-250 DEG C of hot blast, bed of cloth first
Thickness and second bed of cloth thickness sum >=950mm.
In second cloth, the roller number of multi-roller spreader wants≤6.
Verified by commercial production, optimize firing temperature and configure the thermal insulation cover of suitable number and be passed through the heat of high oxygen amount
Wind, can effectively improve the ignition quality of levels agglomerate surface, extend the mineralising time of surface sintering deposit, reduce sintering
The cold short phenomenon of ore deposit.And by the Rational mixed coal of upper strata sinter mixture and water transfer, and reduce the roller number of distributing device, make
Layer sintered mixture ventilation improves.Characteristic according to upper strata compound is it is suppressed that the segregation of bed of material fuel and granularity simultaneously, no
Too fast as bed of material burning, by comprehensive technical measures, upper strata sintering deposit and the rate of return mine of whole sinter bed can be made
Effectively reduced.
Brief description
Fig. 1 adopts the super thick bed of material sintering method process chart of presintering for the present invention；
Wherein 1 mixture distributor device a, 2 is lighter a, and 3 is bed of cloth first, and 4 is mixture distributor device b, and 5 is igniting
Device b, 6 is second bed of cloth, and 7 is thermal insulation cover a after once igniting, and 8 is thermal insulation cover b after regnition.
Specific embodiment
Illustrate with reference to specific embodiment:
Embodiment 1:
The concrete technology flow process of the present invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and lighter 1
On plinth, then set up a set of mixture distributor device 2 and lighter 2, whole SINTERING PRODUCTION adopts a set of exhausting system, first carries out first
Cloth, the coke powder that fabric thickness is 2.7% containing percentage by weight in 700mm, compound first, water content is 7.2%, point
Fiery temperature control, at 1150 DEG C, configures 2 thermal insulation covers after firing, and being passed through oxygen volumn concentration in thermal insulation cover is 18%,
Temperature is 120 DEG C of hot blast；
For the sinter mixture coal mixer that is separately provided of entrance of second cloth, add in coal mixer fuel and
Second cloth system is entered, now the moisture weight percentage ratio of sinter mixture is 7.6%, the percentage by weight of coke powder after water
For 2.75%, after lower floor's sinter mixture sinters 10min in advance, carry out second cloth sintering on the surface of bed of cloth 3 first
Compound, by the way of mud roller adds 5 roller distributing devices, fabric thickness, in 250mm, sinters suction pressure and keeps not second cloth
Become, carry out second igniting sintering, firing temperature controls at 1310 DEG C, configure 4 thermal insulation covers after igniting, be passed through oxygen in thermal insulation cover
Air volume percentage composition is 19%, and temperature is 150 DEG C of hot blast, first the thickness of the thickness of bed of cloth 3 and second bed of cloth 6
Sum 950mm, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first.
Under this technique, main production result such as table 1
Table 1 produces Comparative result
| Total rate of return mine % | Upper strata 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 strata sintering deposit is declined by 28.1%
To 24.7%, total rate of return mine also have decreased to 23.2% by 25.5%.
Embodiment 2:
The concrete technology flow process of the present invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and lighter 1
On plinth, then set up a set of mixture distributor device 2 and lighter 2, whole SINTERING PRODUCTION adopts a set of exhausting system, first carries out first
Cloth, the coke powder that fabric thickness is 2.4% containing percentage by weight in 800mm, compound first, water content is 7.1%, point
Fiery temperature control, at 1200 DEG C, configures 3 thermal insulation covers after firing, and being passed through oxygen volumn concentration in thermal insulation cover is 19%,
Temperature is 150 DEG C of hot blast；
For the sinter mixture coal mixer that is separately provided of entrance of second cloth, add in coal mixer fuel and
Second cloth system is entered, now the moisture weight percentage ratio of sinter mixture is 7.8%, the percentage by weight of coke powder after water
For 2.5%, after lower floor's sinter mixture sinters 15min in advance, carry out second cloth sintering on the surface of bed of cloth 3 first mixed
Close material, by the way of mud roller adds 6 roller distributing devices, fabric thickness, in 250mm, sinters suction pressure and keeps not second cloth
Become, carry out second igniting sintering, firing temperature controls at 1260 DEG C, configure 5 thermal insulation covers after igniting, be passed through oxygen in thermal insulation cover
Air volume percentage composition is 20%, and temperature is 200 DEG C of hot blast, first the thickness of the thickness of bed of cloth 3 and second bed of cloth 6
Sum 1050mm, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first.
Under this technique, main production result such as table 2
Table 2 produces Comparative result
| Total rate of return mine % | Upper strata 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 strata sintering deposit is declined by 25.7%
To 21.4%, total rate of return mine also have decreased to 18.9% by 23.2%.
Embodiment 3:
The concrete technology flow process of the present invention such as Fig. 1, in the base of original sintering belt type roasting machine distributing device 1 and lighter 1
On plinth, then set up a set of mixture distributor device 2 and lighter 2, whole SINTERING PRODUCTION adopts a set of exhausting system, first carries out first
Cloth, the coke powder that fabric thickness is 2.4% containing percentage by weight in 850mm, compound first, water content is 7.3%, point
Fiery temperature control, at 1250 DEG C, configures 4 thermal insulation covers after firing, and being passed through oxygen volumn concentration in thermal insulation cover is 20%,
Temperature is 200 DEG C of hot blast；
For the sinter mixture coal mixer that is separately provided of entrance of second cloth, add in coal mixer fuel and
Second cloth system is entered, now the moisture weight percentage ratio of sinter mixture is 7.9%, the percentage by weight of coke powder after water
For 2.55%, after lower floor's sinter mixture sinters 15min in advance, carry out second cloth sintering on the surface of bed of cloth 3 first
Compound, by the way of mud roller adds 5 roller distributing devices, fabric thickness, in 300mm, sinters suction pressure and keeps not second cloth
Become, carry out second igniting sintering, firing temperature controls at 1210 DEG C, configure 6 thermal insulation covers after igniting, be passed through oxygen in thermal insulation cover
Air volume percentage composition is 21%, and temperature is 250 DEG C of hot blast, first the thickness of the thickness of bed of cloth 3 and second bed of cloth 6
Sum 1150mm, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first.
Under this technique, main production result such as table 3
Table 3 produces Comparative result
| Total rate of return mine % | Upper strata 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 strata sintering deposit is declined by 24.7%
To 20.5%, total rate of return mine also have decreased to 18.2% by 23.4%.
Claims (2)
1. a kind of super thick bed of material sintering method of the employing presintering reducing sinter return fine rate is it is characterised in that sintering belt
First and second mixing distributing device and No. first and second lighter are configured with burning machine；Whole SINTERING PRODUCTION adopts a set of convulsion system
System；First carry out cloth first, after bed material distributing device grate-layer material, then pass through mixture distributor device cloth sinter mixture, igniting
Sintering, after presintering, carries out second cloth sinter mixture in cloth layer surface first, sintering suction pressure keeps constant,
Igniting sintering is carried out to second bed of cloth, when second bed of cloth completes igniting, the compound of bed of cloth is carried out first
Sintering, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first；Fabric thickness is in 600- first
900mm, firing temperature controls at 1150-1250 DEG C, configures 2-4 thermal insulation cover after firing, is passed through oxygen volume in thermal insulation cover
Percentage composition is 17%-21%, and temperature is 120-250 DEG C of hot blast；The sinter mixture of second cloth enters individually special
The coal mixer of setting, carry out second mixing cloth after again adding fuel and water in coal mixer again, now sinter mixture
Moisture weight percentage ratio is 7.6%-7.9%, and the percentage by weight phosphorus content of sinter mixture mixes than during first time cloth
The phosphorus content of material is high 0.05-0.15 percentage point, it is 1.9%～2.8%；After sinter mixture presintering 8-40min, in head
Secondary cloth layer surface carries out second cloth sinter mixture, second cloth by the way of mud roller adds multi-roller spreader, cloth
Thickness, in 200-650mm, carries out second igniting sintering, and firing temperature controls at 1210-1310 DEG C, configuration 4-7 after igniting
Thermal insulation cover, being passed through oxygen volumn concentration in thermal insulation cover is 17%-21%, and temperature is 120-250 DEG C of hot blast, cloth first
Thickness degree and second bed of cloth thickness sum >=950mm.
2. the super thick bed of material sintering method of a kind of employing presintering reducing sinter return fine rate according to claim 1, its
It is characterised by, in second cloth, the roller number of multi-roller spreader wants≤6.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330275A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN108754132A (en) * | 2018-06-14 | 2018-11-06 | 鞍钢股份有限公司 | Method for improving performance of sintered ore metallurgy |
| CN108895837A (en) * | 2018-03-23 | 2018-11-27 | 武汉钢铁有限公司 | Low NO based on the igniting of double-layer cloth bilayerxSintering system |
| CN111826517A (en) * | 2020-07-12 | 2020-10-27 | 首钢集团有限公司 | Super-thick material layer sintering material, sintering method and sintering ore |
| CN112410544A (en) * | 2020-01-19 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Double-layer sintering method and sintering device |
| CN113215390A (en) * | 2020-12-24 | 2021-08-06 | 北京高能时代环境技术股份有限公司 | Copper-containing sludge sintering method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330275A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN108330275B (en) * | 2018-02-13 | 2019-08-06 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN108895837A (en) * | 2018-03-23 | 2018-11-27 | 武汉钢铁有限公司 | Low NO based on the igniting of double-layer cloth bilayerxSintering system |
| CN108754132A (en) * | 2018-06-14 | 2018-11-06 | 鞍钢股份有限公司 | Method for improving performance of sintered ore metallurgy |
| CN112410544A (en) * | 2020-01-19 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Double-layer sintering method and sintering device |
| CN111826517A (en) * | 2020-07-12 | 2020-10-27 | 首钢集团有限公司 | Super-thick material layer sintering material, sintering method and sintering ore |
| 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 |
| CN113215390A (en) * | 2020-12-24 | 2021-08-06 | 北京高能时代环境技术股份有限公司 | Copper-containing sludge sintering method |
| CN113215390B (en) * | 2020-12-24 | 2022-07-22 | 北京高能时代环境技术股份有限公司 | Copper-containing sludge sintering method |
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