CN106399679A - Cooling method for super-thick material layer sintered ore adopting pre-sintering - Google Patents
Cooling method for super-thick material layer sintered ore adopting pre-sintering Download PDFInfo
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- CN106399679A CN106399679A CN201610815341.3A CN201610815341A CN106399679A CN 106399679 A CN106399679 A CN 106399679A CN 201610815341 A CN201610815341 A CN 201610815341A CN 106399679 A CN106399679 A CN 106399679A
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- sintering
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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
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
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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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Abstract
The invention discloses a cooling method for super-thick material layer sintered ore adopting pre-sintering. In the pre-sintering process, the material layer thickness in the first time of distribution is 500-900 mm, the second time of distribution is carried out after pre-sintering is conducted for 8-40 min, the distribution thickness in the second time of distribution is 100-650 mm, and the total material layer thickness after the two times of distribution is higher than or equal to 900 mm. A sintered ore separating device is arranged at the tail discharging position of a belt type roasting machine, sintered ore which is higher than or equal to 500 DEG C in temperature and provided with a red fire layer and surplus sintered ore are separated into two parts, the sintered ore with the temperature lower than 500 DEG C is cooled on a ring cooling machine, and the sintered ore with the temperature higher than or equal to 500 DEG C and natural lump ore with the granularity being 10-50 mm are placed in a vertical cooling furnace to be cooled. Screening is conducted after cooling, the sintered ore with the granularity being higher than or equal to 5 mm directly enters a blast furnace to be smelted, and the sintered ore with the granularity being smaller than 5 mm returns to be sintered. By means of the cooling method, the waste heat recovery efficiency of the sintered ore is greatly improved, and the problem that the natural lump ore explodes in the blast furnace is solved.
Description
Technical field
The invention belongs to field of steel metallurgy, it is related to the sintering production method of iron ore, especially relate to one kind and adopt
Cooling means with the super thick bed of material sintering deposit of presintering.
Background technology
In belt type roasting machine sintering process flow process, generally with central cooler, air blast cooling is carried out to sintering deposit, after cooling
Sintering deposit is transported into sieve compartment screening through belt, and the finished product sintering deposit after screening transports blast furnace to by belt.If central cooler
Cooling effect poor, central cooler discharge pit sintering deposit temperature is high, when through belt-conveying, gently can burn out belt, can cause again
, there is serious work safety accident in fire.
Especially when Sintering Yield to be improved, thus improving thickness of feed layer, when carrying out the production of the super thick bed of material, central cooler is serious
Under overload operation, the cold effect of ring of sintering deposit to be improved does not have preferable method, and the mode being usually taken has：(1) reduce
Central cooler air leak rate of air curtain；(2) cool down on machine；(3) increase the cold aerator of ring；(4) pressure of partly fetching water after central cooler cools down.Its
In, reducing air leak rate of air curtain is a system engineering, and each enterprise does not all have very good method, and reduces machine speed, carries out cooling on machine, no
The cold generating of ring only can be affected, Sintering Yield also can decline to a great extent.If cooled down by increasing annular cooling air blower, have certain
Effect, but production cost can be significantly increased, lose more than gain, and the mode that even more should not take of forcing to fetch water.
So, up to the present, each enterprise can only be daily technology and the production management strengthening central cooler, not directly
Effectively improve the good method of central cooler cooling effectiveness.Meanwhile, the use of natural lump ore is to effectively reduce production in blast furnace
Cost, because natural lump ore bursts at high temperature, can affect the breathability of blast furnace, so natural lump ore joining in blast furnace
Plus ratio is restricted.
Content of the invention
As a kind of brand-new sintering process, pre-sintering process can significantly improve sintering machine production capacity, but is as producing
The raising of amount, the circular cooler that routinely sintering process designs is difficult to meet the requirement producing, and cooling effectiveness can degradation.
In order to improve the cooling effectiveness of central cooler, reduce the damaging influence for high temperature sintering ore deposit for the temperature chilling, the present invention fills simultaneously
Divide, bottom ore bed material temperature high feature low using sintering ore bed top material temperature on sintering machine, high temperature sintering ore deposit is passed through in shaft furnace
Cooling, improves the utilization rate of heat energy.And natural lump ore is added in shaft furnace together with high temperature sintering ore deposit, serve to natural piece
Ore deposit carries out the effect of the pre-heat treatment, blast furnace is carried with product consumption reduction and serves very big effect.Improve the quality of sintering deposit simultaneously,
Perfect pre-sintering process.
Specifically technical scheme is：
A kind of cooling means of the super thick bed of material sintering deposit of employing presintering, so-called pre-burning is become：In sintering belt roasting
Two sets of clothes and ignition system are configured with machine；When for the first time through distributing device cloth sinter mixture, bed of cloth thickness exists first
500～900mm, igniting sintering, after sintering 8～40min time in advance, carry out second cloth sintering in cloth layer surface first
Compound, fabric thickness, in 100～650mm, sinters suction pressure and keeps constant, carries out igniting sintering to second bed of cloth,
When second bed of cloth completes igniting, the compound of bed of cloth is sintered first, twice the thickness of feed layer sum of cloth
>=900mm, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first.
In pre-sintering process, sintering deposit segregation apparatuss are set in belt type roasting machine tail discharge pit, by temperature >=500 DEG C
The sintering deposit with flourishing layer and remaining sintering deposit be separated into single two parts, 500 DEG C of sintering deposit clothes of temperature ＜ are in ring
Cooled down in cold, the natural lump ore that the sintering deposit of temperature >=500 DEG C and blast furnace can be used directly together enters vertical cooling
Stove is cooled down, and with natural lump ore after screening, granularity >=5mm is directly entered blast furnace process, granularity ＜ to the sintering deposit after cooling
5mm returns sintering.
Enter vertical cooling stokehold, the granularity of natural lump ore is 10～50mm.
Beneficial effect：
Low-temperature zone sintering deposit is entered central cooler, improves the cooling effectiveness of central cooler, the cooling reducing central cooler is born
Lotus.High temperature section sintering deposit is passed through in vertical cooling stove, improves the sensible heat utilization rate of high temperature sintering ore deposit.When shaft (tower) furnace cools down
It is passed through natural lump ore so that the lump ore entering blast furnace has obtained heat treatment, on the one hand make the moisture evaporation of natural lump ore attachment, separately
On the one hand at high temperature, natural lump ore bursts, and reduces the probability that lump ore produces explosion in blast furnace, thus effectively dropping
The low burnup of blast furnace, and improve the breathability of comprehensive furnace charge in blast furnace.
Specific embodiment
Pre-sintering process is to be configured with two sets of clothes and ignition system on sintering belt type roasting machine；Bed of cloth thickness first
In 500～900mm, igniting sintering, after sintering 8～40min time in advance, second fabric thickness, in 100～650mm, burns
Knot suction pressure keeps constant, carries out igniting sintering to second bed of cloth, when second bed of cloth completes igniting, cloth first
The compound of layer is sintered, the thickness of feed layer sum >=900mm of cloth twice, at rear of sintering machine, cloth first
Layer and second bed of cloth are complete sintering；
In pre-sintering process, sintering deposit segregation apparatuss are set in belt type roasting machine tail discharge pit, by temperature >=500 DEG C
The sintering deposit with flourishing layer and remaining sintering deposit be separated into single two parts, 500 DEG C of sintering deposit clothes of temperature ＜ are in ring
Cooled down in cold, the natural lump ore that the sintering deposit of temperature >=500 DEG C and blast furnace can be used directly together enters vertical cooling
Stove is cooled down, and with natural lump ore after screening, granularity >=5mm is directly entered blast furnace process, granularity ＜ to the sintering deposit after cooling
5mm returns sintering, and the granularity entering vertical cooling stokehold natural lump ore is 10～50mm.
Following examples are used for illustrating present invention, and these embodiments are only the general description of present invention,
Present invention is not limited.
Embodiment 1：
When belt type roasting machine carries out pre-sintering process production, in 650mm, second cloth burns thickness to bed of cloth thickness first
In 250mm, bed of material gross thickness is 900mm, and sintering time is 10min in advance, is provided with sintering deposit at belt type roasting machine tail
Segregation apparatuss, discharge pit sintering deposit is separated into the sintering deposit with flourishing layer of temperature >=500 DEG C and remaining low-temperature sintering
Ore deposit, low-temperature sintering ore deposit enter central cooler cooling, high temperature sintering ore deposit with can be directly entered blast furnace natural lump ore (granularity be 10～
50mm) together enter vertical cooling stove to be cooled down, with natural lump ore after screening, granularity >=5mm is straight for the sintering deposit after cooling
Tap into into blast furnace process, granularity ＜ 5mm returns sintered material, main production Comparative result such as table 1.
Table 1 produces Comparative result
By the application of the present invention, heat sinter waste heat recovery efficiency greatly improves, and ton ore deposit generated energy improves 3kwh, passes through
The natural lump ore of heat treatment solves in blast furnace the crucial problem of explosion, make natural lump ore in blast furnace with addition of ratio from
10% brings up to 17%, so that enterprise's ironmaking cost is greatly reduced.
Embodiment 2：
When belt type roasting machine carries out pre-sintering process production, in 700mm, second cloth burns thickness to bed of cloth thickness first
In 300mm, bed of material gross thickness is 1000mm, and sintering time is 20min in advance, is provided with sintering deposit at belt type roasting machine tail
Segregation apparatuss, discharge pit sintering deposit is separated into the sintering deposit with flourishing layer of temperature >=700 DEG C and remaining low-temperature sintering
Ore deposit, low-temperature sintering ore deposit enter central cooler cooling, high temperature sintering ore deposit with can be directly entered blast furnace natural lump ore (granularity be 10～
50mm) together enter vertical cooling stove to be cooled down, with natural lump ore after screening, granularity >=5mm is straight for the sintering deposit after cooling
Tap into into blast furnace process, granularity ＜ 5mm returns sintered material, main production Comparative result such as table 2.
Table 2 produces Comparative result
By the application of the present invention, heat sinter waste heat recovery efficiency greatly improves, and ton ore deposit generated energy improves 8kwh, passes through
The natural lump ore of heat treatment solves in blast furnace the crucial problem of explosion, make natural lump ore in blast furnace with addition of ratio from
12% brings up to 22%, so that enterprise's ironmaking cost is greatly reduced.
Claims (2)
1. a kind of cooling means of the super thick bed of material sintering deposit using presintering is it is characterised in that pre-sintering process is in sintering
Two sets of clothes and ignition system are configured with belt type roasting machine；When for the first time through distributing device cloth sinter mixture, cloth first
Thickness degree, in 500～900mm, igniting sintering, after sintering 8～40min time in advance, carries out second in cloth layer surface first
Secondary cloth sinter mixture, fabric thickness, in 100～650mm, sinters suction pressure and keeps constant, second bed of cloth is carried out a little
Burn knot, when second bed of cloth completes igniting, the compound of bed of cloth is sintered first, and the bed of material of cloth is thick twice
Degree sum >=900mm, at rear of sintering machine, bed of cloth and second bed of cloth are complete sintering first；
In pre-sintering process, sintering deposit segregation apparatuss are set in belt type roasting machine tail discharge pit, by the band of temperature >=500 DEG C
The sintering deposit of flourishing layer and remaining sintering deposit is had to be separated into single two parts, 500 DEG C of sintering deposit clothes of temperature ＜ are in central cooler
On cooled down, the natural lump ore that the sintering deposit of temperature >=500 DEG C and blast furnace can be used directly together enter vertical cooling stove enter
Row cooling, with natural lump ore after screening, granularity >=5mm is directly entered blast furnace process to the sintering deposit after cooling, and granularity ＜ 5mm returns
Flash back knot.
2. as claimed in claim 1 a kind of cooling means of the super thick bed of material sintering deposit using presintering it is characterised in that entering
The granularity entering vertical cooling stokehold natural lump ore is 10～50mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815341.3A CN106399679B (en) | 2016-09-12 | 2016-09-12 | A kind of cooling means using pre-sintered super thick bed of material sinter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815341.3A CN106399679B (en) | 2016-09-12 | 2016-09-12 | A kind of cooling means using pre-sintered super thick bed of material sinter |
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| CN106399679A true CN106399679A (en) | 2017-02-15 |
| CN106399679B CN106399679B (en) | 2018-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812163A (en) * | 2022-04-16 | 2022-07-29 | 中钢石家庄工程设计研究院有限公司 | Belt type roasting machine for pellet production and processing technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103160A (en) * | 1993-09-15 | 1995-05-31 | 重庆钢铁(集团)公司 | Vertical agglomerate cooling machine |
| CN202853402U (en) * | 2012-09-24 | 2013-04-03 | 中冶东方工程技术有限公司上海分公司 | High-efficient heat recovery type sinter mine cooling system |
| CN103697707A (en) * | 2013-12-12 | 2014-04-02 | 王忠英 | Vertical cooling and waste heat recovery furnace for sinters |
| CN105387730A (en) * | 2015-12-25 | 2016-03-09 | 宝钢工程技术集团有限公司 | Sintered ore sensible heat exchange device and method |
-
2016
- 2016-09-12 CN CN201610815341.3A patent/CN106399679B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103160A (en) * | 1993-09-15 | 1995-05-31 | 重庆钢铁(集团)公司 | Vertical agglomerate cooling machine |
| CN202853402U (en) * | 2012-09-24 | 2013-04-03 | 中冶东方工程技术有限公司上海分公司 | High-efficient heat recovery type sinter mine cooling system |
| CN103697707A (en) * | 2013-12-12 | 2014-04-02 | 王忠英 | Vertical cooling and waste heat recovery furnace for sinters |
| CN105387730A (en) * | 2015-12-25 | 2016-03-09 | 宝钢工程技术集团有限公司 | Sintered ore sensible heat exchange device and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812163A (en) * | 2022-04-16 | 2022-07-29 | 中钢石家庄工程设计研究院有限公司 | Belt type roasting machine for pellet production and processing technology |
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| CN106399679B (en) | 2018-05-29 |
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