CN109112296A - A kind of low-carbon oxygen-enriched sintering method - Google Patents
A kind of low-carbon oxygen-enriched sintering method Download PDFInfo
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- CN109112296A CN109112296A CN201811140503.3A CN201811140503A CN109112296A CN 109112296 A CN109112296 A CN 109112296A CN 201811140503 A CN201811140503 A CN 201811140503A CN 109112296 A CN109112296 A CN 109112296A
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- pallet
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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
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of low-carbon oxygen-enriched sintering methods, comprising the following steps: (1) iron ore concentrate, sinter return fine, solvent is pressed 70:(10~15): the mass ratio of (8~10) mixes；(2) fuel sintering coal is added, makes iron ore concentrate, sinter return fine, solvent, quality of fuel ratio 70:(10~15): (8~10): (1.5~3)；(3) (1), (2) product are distributed on pallet respectively；(4) pallet is adjusted into machine speed in 0.05~0.08m/s in 1000 DEG C of down-firings；(5) in first 1/3 section plus 10~12kpa of negative pressure of pallet, 1/3 section of middle part adds the negative pressure of the negative pressure of 11~13kpa, 1/3 section of tail portion plus 12~15kpa；(6) oxygen-enriched air that volumetric concentration is 50~60% is continually fed into the top of 1/3 section of pallet tail portion；(7) sintered products are collected.The advantages of the present invention over the prior art are that: the dosage of fuel substantially reduces, and carbon content is reduced in tail gas, and sintering effect is greatly improved, and properties of product are stablized.
Description
Technical field
The present invention relates to sintering technology field, in particular to a kind of low-carbon oxygen-enriched sintering methods.
Background technique
Sintering is one of the process of steel industry indispensability, and the iron ore concentrate of powdery can be become the block-like iron for being easy to smelt by it
Raw material, main sintering fuel is coke in sintering process, and iron material partial liquefaction can be made it easily by the high temperature that when burning generates
In generation cake mass, but the consumption of process coke traditional at present is sintered products per ton 4% or more, and is generated
A large amount of carbon monoxide toxic gases, bed of material itself has accumulation of heat effect during the sintering process, i.e., the accumulation of heat of upper layer burning is under
Layer sintering is beneficial, a large amount of combustion heat that upper layer has generated when the lowest level of the bed of material is sintered, but this part combustion heat does not have
Be fully utilized, be largely lost, therefore, realize low-carbon sintering, and make full use of the accumulation of heat of the bed of material act on be it is energy-saving must
By road.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the above technological deficiency, provide that a kind of fuel utilization is few, tail gas generates
Less, the sintering method for making full use of bed of material accumulation of heat effect, sintering effect good.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of low-carbon oxygen-enriched sintering method, including with
Lower step:
(1) by iron ore concentrate, sinter return fine, solvent by 70:(10~15): the mass ratio of (8~10) is mixed and is mixed；
(2) take the product mix in (1) that fuel sintering coal is added, so that the matter of iron ore concentrate, sinter return fine, solvent, fuel
Amount is than being 70:(10~15): (8~10): (1.5~3)；
(3) (1), (2) product are distributed on pallet respectively, (1) accounts for the 1/5 of thickness of feed layer in lower section；
(4) pallet is adjusted into machine speed in 0.05~0.08m/s in 1000 DEG C of down-firings；
(5) in first 1/3 section plus 10~12kpa of negative pressure of pallet, 1/3 section of middle part adds the negative pressure of 11~13kpa, tail
The negative pressure of 1/3 section of portion plus 12~15kpa；
(6) oxygen-enriched air that volumetric concentration is 50~60% is continually fed into the top of 1/3 section of pallet tail portion；
(7) sintered products are collected after being sintered, and complete sintering work.
The advantages of the present invention over the prior art are that: the dosage of fuel substantially reduces, and carbon content is reduced in tail gas, burns
Knot effect is greatly improved, and properties of product are stablized.
Specific embodiment
A kind of embodiment one: low-carbon oxygen-enriched sintering method, comprising the following steps:
(1) iron ore concentrate, sinter return fine, solvent are mixed and is mixed by the mass ratio of 70:13:8；
(2) take the product mix in part (1) that fuel sintering coal is added, so that iron ore concentrate, sinter return fine, solvent, fuel
Mass ratio be 70:13:8:2；
(3) (1), (2) product are distributed on pallet respectively, (1) accounts for the 1/5 of thickness of feed layer in lower section；
(4) pallet is adjusted into machine speed in 0.05m/s in 1000 DEG C of down-firings；
(5) and at first 1/3 section plus 10kpa of negative pressure of pallet, intermediate 1/3 section plus 11kpa of negative pressure, end 1/3
The negative pressure of section plus 12kpa；
(6) oxygen-enriched air that volumetric concentration is 50% is continually fed into above 1/3 section of pallet end；
(7) sintered products are collected after being sintered, and complete sintering work.
A kind of embodiment two: low-carbon oxygen-enriched sintering method, comprising the following steps:
(1) iron ore concentrate, sinter return fine, solvent are mixed and is mixed by the mass ratio of 70:15:9；
(2) take the product mix in part (1) that fuel sintering coal is added, so that iron ore concentrate, sinter return fine, solvent, fuel
Mass ratio be 70:15:9:2.5；
(3) (1), (2) product are distributed on pallet respectively, (1) accounts for the 1/5 of thickness of feed layer in lower section；
(4) pallet is adjusted into machine speed in 0.06m/s in 1000 DEG C of down-firings；
(5) and at first 1/3 section plus 11kpa of negative pressure of pallet, intermediate 1/3 section plus 12kpa of negative pressure, end 1/3
The negative pressure of section plus 13kpa；
(6) oxygen-enriched air that volumetric concentration is 55% is continually fed into above 1/3 section of pallet end；
(7) sintered products are collected after being sintered, and complete sintering work.
A kind of embodiment three: low-carbon oxygen-enriched sintering method, comprising the following steps:
(1) iron ore concentrate, sinter return fine, solvent are mixed and is mixed by the mass ratio of 70:15:10；
(2) take the product mix in (1) that fuel sintering coal is added, so that the matter of iron ore concentrate, sinter return fine, solvent, fuel
Amount is than being 70:15:10:3；
(3) (1), (2) product are distributed on pallet respectively, (1) accounts for the 1/5 of thickness of feed layer in lower section；
(4) pallet is adjusted into machine speed in 0.08m/s in 1000 DEG C of down-firings；
(5) and at first 1/3 section plus 12kpa of negative pressure of pallet, intermediate 1/3 section plus 13kpa of negative pressure, end 1/3
The negative pressure of section plus 15kpa；
(6) oxygen-enriched air that volumetric concentration is 60% is continually fed into above 1/3 section of pallet end；
(7) sintered products are collected after being sintered, and complete sintering work.
The present invention and its embodiments have been described above, this description is not restricted.All in all if originally
The those of ordinary skill in field is enlightened by it, without departing from the spirit of the invention, is not inventively designed
With the technical solution similar embodiment, it is within the scope of protection of the invention.
Claims (1)
1. a kind of low-carbon oxygen-enriched sintering method, it is characterised in that: the following steps are included:
(1) by iron ore concentrate, sinter return fine, solvent by 70:(10~15): the mass ratio of (8~10) is mixed and is mixed；
(2) take the product mix in (1) that fuel sintering coal is added, so that iron ore concentrate, sinter return fine, solvent, quality of fuel ratio
For 70:(10~15): (8~10): (1.5~3)；
(3) (1), (2) product are distributed on pallet respectively, (1) accounts for the 1/5 of thickness of feed layer in lower section；
(4) pallet is adjusted into machine speed in 0.05~0.08m/s in 1000 DEG C of down-firings；
(5) in first 1/3 section plus 10~12kpa of negative pressure of pallet, 1/3 section of middle part adds the negative pressure of 11~13kpa, tail portion 1/
3 sections plus 12~15kpa of negative pressure；
(6) oxygen-enriched air that volumetric concentration is 50~60% is continually fed into the top of 1/3 section of pallet tail portion；
(7) sintered products are collected after being sintered, and complete sintering work.
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| CN201811140503.3A CN109112296B (en) | 2018-09-28 | 2018-09-28 | A kind of low-carbon oxygen-enriched sintering method |
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| CN201811140503.3A CN109112296B (en) | 2018-09-28 | 2018-09-28 | A kind of low-carbon oxygen-enriched sintering method |
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| CN109112296A true CN109112296A (en) | 2019-01-01 |
| CN109112296B CN109112296B (en) | 2019-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652544A (en) * | 2021-07-29 | 2021-11-16 | 钢铁研究总院 | Low-carbon sintering system and process method |
Citations (7)
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|---|---|---|---|---|
| JP2000169916A (en) * | 1998-12-07 | 2000-06-20 | Nkk Corp | High quality sintered ore and production thereof |
| CN101144117A (en) * | 2007-10-15 | 2008-03-19 | 莱芜钢铁集团有限公司 | Oxygen-enriched sintering technique |
| CN101608255A (en) * | 2008-06-20 | 2009-12-23 | 普莱克斯技术有限公司 | The periodic oxygen-enriched sintering of iron ore |
| CN102925674A (en) * | 2011-08-12 | 2013-02-13 | 中国钢铁股份有限公司 | Method for increasing output of sintering process |
| CN104673998A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Method for reducing burnup of iron ore powder composite agglomerated solid |
| CN105132673A (en) * | 2015-09-24 | 2015-12-09 | 中南大学 | Method capable of reducing energy consumption of solid in carbon-containing iron-containing dust pellet material composite agglomeration blocks |
| CN107304460A (en) * | 2016-04-19 | 2017-10-31 | 中冶长天国际工程有限责任公司 | A kind of iron ore prereduction sintering method and its device |
-
2018
- 2018-09-28 CN CN201811140503.3A patent/CN109112296B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000169916A (en) * | 1998-12-07 | 2000-06-20 | Nkk Corp | High quality sintered ore and production thereof |
| CN101144117A (en) * | 2007-10-15 | 2008-03-19 | 莱芜钢铁集团有限公司 | Oxygen-enriched sintering technique |
| CN101608255A (en) * | 2008-06-20 | 2009-12-23 | 普莱克斯技术有限公司 | The periodic oxygen-enriched sintering of iron ore |
| CN102925674A (en) * | 2011-08-12 | 2013-02-13 | 中国钢铁股份有限公司 | Method for increasing output of sintering process |
| CN104673998A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Method for reducing burnup of iron ore powder composite agglomerated solid |
| CN105132673A (en) * | 2015-09-24 | 2015-12-09 | 中南大学 | Method capable of reducing energy consumption of solid in carbon-containing iron-containing dust pellet material composite agglomeration blocks |
| CN107304460A (en) * | 2016-04-19 | 2017-10-31 | 中冶长天国际工程有限责任公司 | A kind of iron ore prereduction sintering method and its device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652544A (en) * | 2021-07-29 | 2021-11-16 | 钢铁研究总院 | Low-carbon sintering system and process method |
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