CN109097560A - A kind of application method of low grade hematite in sintering production - Google Patents
A kind of application method of low grade hematite in sintering production Download PDFInfo
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- CN109097560A CN109097560A CN201811063452.9A CN201811063452A CN109097560A CN 109097560 A CN109097560 A CN 109097560A CN 201811063452 A CN201811063452 A CN 201811063452A CN 109097560 A CN109097560 A CN 109097560A
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- sintering
- low grade
- sinter
- grade hematite
- hematite
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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 present invention relates to a kind of application method of low grade hematite in sintering production.Its technical solution is: being first laid on the low grade hematite that partial size is 10~20mm on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture.Then ignition sintering: sintering ignition negative pressure is 5.0~6.0kPa；Sintering suction pressure is 12~13kPa；Firing temperature is 1100~1200 DEG C；The duration of ignition is 2.0~2.5min.The hearth layer for sintering with a thickness of 30~40mm；The sinter mixture with a thickness of 720~740mm.The present invention not only has the characteristics that sintering finished rate is high, fuel consumption is few, sintering is at low cost, low grade hematite resource utilization is high, moreover it is possible to the effectively crystallization water and objectionable impurities contained by removing low grade hematite, and the grade of low grade hematite can be improved.
Description
Technical field
The application method technical field that the invention belongs to bloodstone in sintering production.More particularly to a kind of low-grade red iron
Application method of the mine in sintering production.
Background technique
In recent years, big variation is occurring for world steel ore resource, and abundant ore source gradually decreases, in short supply.For
Production cost is met the needs of production and reduces, domestic and international many iron and steel enterprises begin to use the low of cheap rich reserves
The import of grade mine fictitious hosts valuableness and domestic high-grade rich ore powder.Therefore how rationally adequately using low-grade ore this
Resource, and obtain and meet the high quality sinter of blast furnace process demand, it has also become iron and steel enterprise and technical staff's weight of interest
One of point.
In sintering production using grate-layer material energy effective protection fire grate, improve its service life, prevent powder from grid section gap take out
It walks, reduce exhaust gas dustiness, reducing deduster load and improve fan life, being avoided that powder and sinter blocking and bonding furnace
It combs, keeps the effective exhausting area of fire grate constant, keep air flow method uniform.
" a kind of hearth layer for sintering and preparation method thereof and sintering method " (CN104762468A), " limonite is in production ball
Roll into a ball the application in sinter method as grate-layer material " it is (CN1429920A) and " a kind of to improve Sintering Yield using siderite
The patented technologies such as method " (CN103834799A) disclose the method for production pellet agglomerate under the conditions of different grate-layer materials, though respectively
There is advantage, but also has that shop fixtures bed of material sinter quality is not good enough, sintering cost is excessively high, can not be rationally largely using low-grade red iron
The problems such as ore resources.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide that a kind of sintering finished rate is high, fuel consumption is few, sintering
The sintering method of low grade hematite at low cost, low grade hematite resource utilization is high, this method can also effectively remove low
The crystallization water contained by grade bloodstone and objectionable impurities can also improve the grade of low grade hematite.
In order to achieve the above technical purposes, the present invention adopts the following technical scheme: the low product for being first 10~20mm by partial size
Position bloodstone is laid on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture.Then point
Burn knot: sintering ignition negative pressure is 5.0~6.0kPa；Sintering suction pressure is 12~13kPa；Firing temperature is 1100~1200
℃；The duration of ignition is 2.0~2.5min.
The hearth layer for sintering with a thickness of 30~40mm.
The sinter mixture with a thickness of 720~740mm.
The chemical component of the low grade hematite is: TFe is 32.34~36.34wt%；FeO be 39.83~
43.83wt%；SiO2For 2.80~3.60wt%；Al2O3For 0.37~0.57wt%；CaO is 3.04~4.44wt%；MgO is
6.70~7.70wt%；P is 0.025~0.035wt%；S is 0.40~0.49wt%；The crystallization water is 0.32~0.40wt%；
Scaling loss is 31.29~33.29%.
The sintering basicity of the sinter mixture is 1.96~2.20, the coke of sinter mixture proportion for 6.0~
6.4%, mixture TFe content >=55.0%.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
(1) present invention can make full use of heat in sintering flue gas, can effectively remove in bloodstone the contained crystallization water and have
Evil impurity, raising bloodstone grade, the intensity for improving bloodstone and metallurgical performance, the consumption of reduction fuel and reduction sinter into
This.
(2) present invention can improve sintering finished rate, improve sintered ore rotary drum strength and metallurgical performance, be conducive to improve blast furnace
The technical-economic index of smelting.
(3) present invention can reasonably use rich reserves, cheap low grade hematite, avoid making using finished product mine
Grate-layer material, so as to effectively improve sintering engine efficiency.
Use the obtained sinter of sintering method of the present invention through detecting: Sinter Tumber Index for 61.53~
67.60%；Sintering finished rate is 62.38~68.31%；RDI of Sinter is 81.4~88.6%；Sinter
Reproducibility be 76.4~83.7%.
Therefore, the present invention not only has that sintering finished rate is high, fuel consumption is few, sintering is at low cost, low grade hematite provides
The high feature of source utilization rate, moreover it is possible to the effectively crystallization water and objectionable impurities contained by removing low grade hematite, and can improve low-grade
The grade of bloodstone.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that following material Unify legislations in present embodiment are as follows to avoid repeating, it is no longer superfluous in embodiment
It states:
The chemical component of the low grade hematite is: TFe is 32.34~36.34wt%；FeO be 39.83~
43.83wt%；SiO2For 2.80~3.60wt%；Al2O3For 0.37~0.57wt%；CaO is 3.04~4.44wt%；MgO is
6.70~7.70wt%；P is 0.025~0.035wt%；S is 0.40~0.49wt%；The crystallization water is 0.32~0.40wt%；
Scaling loss is 31.29~33.29%.
The sintering basicity of the sinter mixture is 1.96~2.20, the coke of sinter mixture proportion for 6.0~
6.4%, mixture TFe content >=55.0%.
Embodiment 1
A kind of application method of low grade hematite in sintering production.The low-grade red iron for being first 10~20mm by partial size
Mine is laid on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture.Then ignition sintering:
Sintering ignition negative pressure is 5.0~5.4kPa；Sintering suction pressure is 12~12.4kPa；Firing temperature is 1100~1160 DEG C；Point
The fiery time is 2.0~2.5min.
The hearth layer for sintering with a thickness of 30~34mm.
The sinter mixture with a thickness of 720~730mm.
Use the obtained sinter of sintering method described in the present embodiment through detecting: Sinter Tumber Index for 61.53~
63.60%；Sintering finished rate is 62.38~64.20%；RDI of Sinter is 81.4~83.6%；Sinter
Reproducibility be 76.4~78.8%.
Embodiment 2
A kind of application method of low grade hematite in sintering production.The low-grade red iron for being first 10~20mm by partial size
Mine is laid on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture.Then ignition sintering:
Sintering ignition negative pressure is 5.3~5.7kPa；Sintering suction pressure is 12.3~12.7kPa；Firing temperature is 1120~1180 DEG C；
The duration of ignition is 2.0~2.5min.
The hearth layer for sintering with a thickness of 33~37mm.
The sinter mixture with a thickness of 725~735mm.
Use the obtained sinter of sintering method described in the present embodiment through detecting: Sinter Tumber Index for 62.80~
66.72%；Sintering finished rate is 63.04~65.71%；RDI of Sinter is 82.81~86.42%；Sintering
The reproducibility of mine is 77.60~80.31%.
Embodiment 3
A kind of application method of low grade hematite in sintering production.The low-grade red iron for being first 10~20mm by partial size
Mine is laid on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture.Then ignition sintering:
Sintering ignition negative pressure is 5.6~6.0kPa；Sintering suction pressure is 12.6~13kPa；Firing temperature is 1140~1200 DEG C；Point
The fiery time is 2.0~2.5min.
The hearth layer for sintering with a thickness of 36~40mm.
The sinter mixture with a thickness of 730~740mm.
Use the obtained sinter of sintering method described in the present embodiment through detecting: Sinter Tumber Index for 65.30~
67.60%；Sintering finished rate is 65.33~68.31%；RDI of Sinter is 85.88~88.6%；Sinter
Reproducibility be 79.91~83.70%.
Present embodiment has following good effect compared with prior art:
(1) present embodiment can make full use of the heat in sintering flue gas, can effectively remove contained knot in bloodstone
Brilliant water and objectionable impurities improve bloodstone grade, the intensity for improving bloodstone and metallurgical performance, the consumption and reduction that reduce fuel
It is sintered cost.
(2) present embodiment can improve sintering finished rate, improve sintered ore rotary drum strength and metallurgical performance, be conducive to
Improve the technical-economic index of blast furnace process.
(3) present embodiment can reasonably use rich reserves, cheap low grade hematite, avoid using
Finished product mine makees grate-layer material, so as to effectively improve sintering engine efficiency.
Use the obtained sinter of sintering method described in present embodiment through detecting: Sinter Tumber Index for
61.53~67.60%；Sintering finished rate is 62.38~68.31%；RDI of Sinter is 81.4~88.6%；
The reproducibility of sinter is 76.4~83.7%.
Therefore, present embodiment not only has that sintering finished rate is high, fuel consumption is few, sintering is at low cost, low-grade
The high feature of bloodstone resource utilization, moreover it is possible to the effectively crystallization water and objectionable impurities contained by removing low grade hematite, and can mention
The grade of high low grade hematite.
Claims (2)
1. a kind of application method of low grade hematite in sintering production, it is characterised in that: be first 10~20mm's by partial size
Low grade hematite is laid on pallet as hearth layer for sintering, then at hearth layer for sintering upper berth sinter mixture；So
Ignition sintering afterwards: sintering ignition negative pressure is 5.0~6.0kPa, and sintering suction pressure is 12~13kPa, firing temperature for 1100~
1200 DEG C, the duration of ignition is 2.0~2.5min；
The hearth layer for sintering with a thickness of 30~40mm；
The sinter mixture with a thickness of 720~740mm；
The chemical component of the low grade hematite is: TFe is 32.34~36.34wt%, and FeO is 39.83~43.83wt%,
SiO2For 2.80~3.60wt%, Al2O3For 0.37~0.57wt%, CaO is 3.04~4.44wt%, MgO is 6.70~
7.70wt%, P are 0.025~0.035wt%, and S is 0.40~0.49wt%, and the crystallization water is 0.32~0.40wt%, and scaling loss is
31.29~33.29%.
2. the sintering method of low grade hematite according to claim 1, it is characterised in that the sintering of the sinter mixture
Basicity is 1.96~2.20, and the coke proportion of sinter mixture is 6.0~6.4%, mixture TFe content >=55.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811063452.9A CN109097560A (en) | 2018-09-12 | 2018-09-12 | A kind of application method of low grade hematite in sintering production |
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|---|---|---|---|
| CN201811063452.9A CN109097560A (en) | 2018-09-12 | 2018-09-12 | A kind of application method of low grade hematite in sintering production |
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| CN109097560A true CN109097560A (en) | 2018-12-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429920A (en) * | 2001-12-31 | 2003-07-16 | 新疆钢铁研究所 | Application of limonite as base material in pelletizing agglomerate production method |
| CN1891837A (en) * | 2005-07-04 | 2007-01-10 | 中冶长天国际工程有限责任公司 | Mineral raw material sintering process |
| CN107012317A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | A kind of vast scale uses the sintering operation method of limonite |
| CN108315551A (en) * | 2018-02-05 | 2018-07-24 | 武汉科技大学 | A kind of sintering method of low-grade limonite |
-
2018
- 2018-09-12 CN CN201811063452.9A patent/CN109097560A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429920A (en) * | 2001-12-31 | 2003-07-16 | 新疆钢铁研究所 | Application of limonite as base material in pelletizing agglomerate production method |
| CN1891837A (en) * | 2005-07-04 | 2007-01-10 | 中冶长天国际工程有限责任公司 | Mineral raw material sintering process |
| CN107012317A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | A kind of vast scale uses the sintering operation method of limonite |
| CN108315551A (en) * | 2018-02-05 | 2018-07-24 | 武汉科技大学 | A kind of sintering method of low-grade limonite |
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