CN107012317A - A kind of vast scale uses the sintering operation method of limonite - Google Patents
A kind of vast scale uses the sintering operation method of limonite Download PDFInfo
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- CN107012317A CN107012317A CN201610056222.4A CN201610056222A CN107012317A CN 107012317 A CN107012317 A CN 107012317A CN 201610056222 A CN201610056222 A CN 201610056222A CN 107012317 A CN107012317 A CN 107012317A
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- sintering
- limonite
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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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- Geochemistry & Mineralogy (AREA)
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- 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 present invention provides a kind of sintering operation method that vast scale uses limonite, and 10~20% Brazilian ore deposits or magnetic concentrate are incorporated during with ore deposit；Fuel ratio control controls the fuel content of 0~5mm grades 83~86% 5.5~6.5%；Moisture addition of the sinter mixture in mixer is compared with bloodstone increase by 1.5~2.0%；Firing temperature control is at 1100~1150 DEG C, and the duration of ignition is controlled in 2.5~3.5min；The volume density of sintering feed on binder, increase chassis is carried out before sintering to charge level, the amount of contraction of the bed of material is reduced；Finished product sintering deposit implements sprinkling calcium chloride process, and calcium chloride spray concentration is 4.5~5.5%, and fountain height is the 2~3% of finished product sintering deposit.The present invention not only solves sintering vast scale using the problem of sintering deposit physical index is deteriorated after limonite, and imported iron ore fines are substituted with cheap limonite while realizing, so as to greatly reduction raw materials for sintering cost.
Description
Technical field
The invention belongs to the sintering operation side that vast scale in SINTERING TECHNOLOGY field, more particularly to a kind of sintering deposit uses limonite
Method.
Background technology
With the increasingly shortage of iron and steel enterprise's iron-bearing material, the ratio that limonite is used for sintering production is increasing, but thereupon
Be exactly limonite sintering exist technical problem, because limonite physical and chemical performance is more special, granularity is thicker, crystal water content compared with
Height, and scaling loss, single fire poor performance, by original traditional sintering technology, sintering mixed carbon comtent, amount of water, negative pressure, waste gas temperature
Degree controlled level can not meet the requirement of vast scale limonite sintering.It is mainly manifested in sinter strength poor, productivity ratio low one
Series of problems, directly affects the promotion and application that sintering vast scale uses limonite.
The content of the invention
The purpose of the present invention is intended to increase the ratio of limonite in sintering deposit, reduction vast scale using limonite to Sintering Yield and
The influence of technical indicator, imported iron ore fines are substituted with limonite, reduce raw materials for sintering cost.
Therefore, the technical solution that the present invention is taken is：
A kind of vast scale uses the sintering operation method of limonite, and accounting for sintering deposit of the material rate more than 40% for limonite grasps
It is as method：
(1) raw material mix is adjusted, improves the matching degree of blending ore sintering character.It is anabolic strong due to limonite, in supplying
Two easily there is superfusion phenomenon when larger, therefore Iron Ore Powder collocation that should be higher with assimilation temperature when with ore deposit is used, to ensure sintering feed
The gas permeability of layer, it is to avoid productivity of sinter is reduced and sinter quality is deteriorated, therefore the Brazilian ore deposit of supplying 10~20% or magnetic concentrate.
(2) increase firing rate, relax the fuel granularity upper limit.Because limonite brings substantial amounts of absorption water and the crystallization water into itself,
It evaporates and decomposition needs to consume a part of heat；On the other hand iron therein is with Fe2O3Form is present, and to make Fe2O3Become
Liquid phase promotes Fe2O3With gangue effect production liquid phase, higher temperature is required to.Therefore fuel ratio is controlled 5.5~6.5%,
The fuel content of 0~5mm grades is controlled 83~86%, is so conducive to extending high temperature hold time, promotes limonite hole
Closure, it is to avoid liquid phase penetrate into crack occur assimilation and cause embrittlement.
(3) mixture moisture addition is improved.The characteristics of moisture is high during for limonite wet volume capacity greatly with granulation, need to increase mixing
Moisture addition in machine, improves the pellet performance and bed permeability of compound, improves the aerodynamics of sintering process, therefore
When vast scale uses limonite sintering compound, the moisture addition in mixer is relatively using increase by 1.5~2.0% during bloodstone.
(4) firing temperature is improved, extends the duration of ignition.In order that the intragranular crystallization water of limonite is fully excluded, to ensure to burn
Ore deposit intensity is tied, can be by the way that by firing temperature, the extension duration of ignition open the deficiency for making up sintering top layer heat, and be to be carried in the bed of material
Heating load, improves the crystalline state of mineral, improves sinter strength, and firing temperature is controlled in 1100~1150 DEG C, the duration of ignition
Control is in 2.5~3.5min.
(5) binder is taken to operate.Binder is carried out to charge level before sintering, coordinates the volume density of sintering feed on deep bed sintering increase chassis,
The amount of contraction of the bed of material is reduced, weakens the decline of materialbeds comminution and the increase of charge level wind speed, the intensity and yield rate of sintering deposit is improved.
(6) finished product sintering deposit implements sprinkling calcium chloride process.The essential mineral composition of sintering deposit is Fe2O3, and Fe2O3Content compared with
Height, causes sintering deposit low temperature reduction degradation phenomenon serious, thus reply sintering deposit implements sprinkling calcium chloride process, to contain sintering
The low temperature efflorescence of ore deposit, calcium chloride spray concentration is 4.5~5.5%, and fountain height is the 2~3% of finished product sintering deposit.
Beneficial effects of the present invention are：
The present invention not only solves sintering vast scale using the problem of sintering deposit physical index is deteriorated after limonite, at the same realize with
Cheap limonite substitutes imported iron ore fines, so as to greatly reduction raw materials for sintering cost.
Embodiment
Embodiment 1：It is 45% that limonite, which accounts for material rate,
The Brazilian ore deposit of supplying 18% when the 1st, with ore deposit.
2nd, fuel ratio control controls the fuel content of 0~5mm grades 84% 6%.
3rd, vast scale increases by 1.8% using moisture addition of the limonite sintering compound in mixer compared with bloodstone.
4th, firing temperature control is at 1120 DEG C, and the duration of ignition is controlled in 3min.
5th, the volume density of sintering feed on binder, increase chassis is carried out before sintering to charge level, the amount of contraction of the bed of material is reduced.
6th, finished product sintering deposit implements sprinkling calcium chloride process, and calcium chloride spray concentration is 5%, and fountain height is the 2.5% of finished product sintering deposit.
Embodiment 2：It is 43% that limonite, which accounts for material rate,
15% magnetic concentrate is incorporated when the 1st, with ore deposit.
2nd, fuel ratio control controls the fuel content of 0~5mm grades 85% 6.2%.
3rd, vast scale increases by 1.7% using moisture addition of the limonite sintering compound in mixer compared with bloodstone.
4th, firing temperature control is at 1140 DEG C, and the duration of ignition is controlled in 3.2min.
5th, the volume density of sintering feed on binder, increase chassis is carried out before sintering to charge level, the amount of contraction of the bed of material is reduced.
6th, finished product sintering deposit implements sprinkling calcium chloride process, and calcium chloride spray concentration is 4.8%, and fountain height is finished product sintering deposit
2.7%.
Claims (1)
1. a kind of vast scale uses the sintering operation method of limonite, it is characterised in that account for original for limonite
Sintering deposit operating method of the material ratio more than 40% be：
(1) raw material mix is adjusted, improves the matching degree of blending ore sintering character, 10~20% are incorporated during with ore deposit
Assimilate the higher Brazilian ore deposit of temperature or magnetic concentrate；
(2) increase firing rate, relax the fuel granularity upper limit, fuel ratio control, will 5.5~6.5%
The fuel content of 0~5mm grades is controlled 83~86%；
(3) mixture moisture addition is improved, when vast scale uses limonite sintering compound, in mixer
Moisture addition ratio use bloodstone when increase by 1.5~2.0%；
(4) firing temperature is improved, extends the duration of ignition, firing temperature is controlled at 1100~1150 DEG C, igniting
Time control is in 2.5~3.5min；
(5) binder is taken to operate, the volume for carrying out sintering feed on binder, increase chassis before sintering to charge level is close
Degree, reduces the amount of contraction of the bed of material；
(6) finished product sintering deposit implements sprinkling calcium chloride process, and calcium chloride spray concentration is 4.5~5.5%, spray
The amount of spilling is the 2~3% of finished product sintering deposit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056222.4A CN107012317A (en) | 2016-01-27 | 2016-01-27 | A kind of vast scale uses the sintering operation method of limonite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056222.4A CN107012317A (en) | 2016-01-27 | 2016-01-27 | A kind of vast scale uses the sintering operation method of limonite |
Publications (1)
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| CN107012317A true CN107012317A (en) | 2017-08-04 |
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| CN201610056222.4A Pending CN107012317A (en) | 2016-01-27 | 2016-01-27 | A kind of vast scale uses the sintering operation method of limonite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097560A (en) * | 2018-09-12 | 2018-12-28 | 武汉科技大学 | A kind of application method of low grade hematite in sintering production |
| CN113528808A (en) * | 2021-05-24 | 2021-10-22 | 红河钢铁有限公司 | Sintered ore based on high-crystal-water limonite and magnetic separation tailings and production method thereof |
| CN113981211A (en) * | 2021-10-14 | 2022-01-28 | 张家港宏昌钢板有限公司 | Sintering method of high-proportion limonite |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
Citations (7)
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|---|---|---|---|---|
| JPH0867919A (en) * | 1994-08-26 | 1996-03-12 | Kawasaki Steel Corp | Production of sintered ore made of limonite based ore |
| CN102102146A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Method for sintering high-aluminum refractory limonite |
| CN102787234A (en) * | 2012-08-23 | 2012-11-21 | 武钢集团昆明钢铁股份有限公司 | High-ratio sintering method for limonite |
| CN102816922A (en) * | 2011-06-10 | 2012-12-12 | 上海梅山钢铁股份有限公司 | Sintering raw material composition and sintering agglomeration method |
| CN102925671A (en) * | 2012-11-14 | 2013-02-13 | 攀钢集团研究院有限公司 | Sintering method of iron ore with added limonite |
| CN103215443A (en) * | 2013-05-21 | 2013-07-24 | 唐山瑞丰钢铁（集团）有限公司 | High-ore-matching-ratio brown iron ore sintering technology |
| CN104711415A (en) * | 2015-04-09 | 2015-06-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Limonite sintering treatment method |
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2016
- 2016-01-27 CN CN201610056222.4A patent/CN107012317A/en active Pending
Patent Citations (7)
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| JPH0867919A (en) * | 1994-08-26 | 1996-03-12 | Kawasaki Steel Corp | Production of sintered ore made of limonite based ore |
| CN102102146A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Method for sintering high-aluminum refractory limonite |
| CN102816922A (en) * | 2011-06-10 | 2012-12-12 | 上海梅山钢铁股份有限公司 | Sintering raw material composition and sintering agglomeration method |
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| CN102925671A (en) * | 2012-11-14 | 2013-02-13 | 攀钢集团研究院有限公司 | Sintering method of iron ore with added limonite |
| CN103215443A (en) * | 2013-05-21 | 2013-07-24 | 唐山瑞丰钢铁（集团）有限公司 | High-ore-matching-ratio brown iron ore sintering technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097560A (en) * | 2018-09-12 | 2018-12-28 | 武汉科技大学 | A kind of application method of low grade hematite in sintering production |
| CN113528808A (en) * | 2021-05-24 | 2021-10-22 | 红河钢铁有限公司 | Sintered ore based on high-crystal-water limonite and magnetic separation tailings and production method thereof |
| CN113981211A (en) * | 2021-10-14 | 2022-01-28 | 张家港宏昌钢板有限公司 | Sintering method of high-proportion limonite |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
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Application publication date: 20170804 |