CN104204242A - Method for adjusting precursor powder for sintering, and precursor powder for sintering - Google Patents
Method for adjusting precursor powder for sintering, and precursor powder for sintering Download PDFInfo
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- CN104204242A CN104204242A CN201380015278.XA CN201380015278A CN104204242A CN 104204242 A CN104204242 A CN 104204242A CN 201380015278 A CN201380015278 A CN 201380015278A CN 104204242 A CN104204242 A CN 104204242A
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- raw material
- agglomerate
- iron ore
- coke breeze
- material powder
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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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- 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
According to the present invention, by adjusting a mixing ratio [(C/F) * 100] between the mass of an iron ore raw material (F) having particles with a diameter of at least 3 mm, and the mass of coke breeze (C) having particles with a diameter of at least 3 mm, to a range of two to three percent, a precursor powder for sintering, which is excellent for efficiently producing sinter, can be adjusted, without depending on the quality of the iron ore.
Description
Technical field
The present invention relates to adjust the method for raw material powder and the agglomerate raw material powder being obtained by the method for agglomerate that blast furnace is used.
Background technology
For the operation of stable and high efficiency blast furnace, importantly use cold strength, being reduced property, the high-quality agglomerate of each excellent such as resistance to reduction disintegration.Yet it is many that such agglomerate is controlled project during fabrication, in order to realize the yield rate of finished product, the raising of productivity, there is variety of issue.
In general, agglomerate is manufactured by following method.
First, to the iron ore of the particle diameter below about 10mm, add the auxiliary material that belongs to the coke, Wingdale etc. of flocculation agent and contain CaO, nickel slag etc. to contain SiO
2auxiliary material etc. and mix, add wherein suitable moisture with drum mixer etc. mix, granulation.Thereafter, the granular agglomerate obtaining is loaded into together with coke breeze with raw material on the chassis of sinter machine, forms agglomerate raw material layer on chassis.Then, at agglomerate, with raw material layer, be situated between and lighted a fire by the solid fuel of skin section.And then under the effect of air, agglomerate burns successively with the solid fuel in raw material layer, sintering becomes sinter cake.This sinter cake by crushing and pelletizing after, by agglomerate more than certain particle diameter, as agglomerate for blast furnace, send into blast furnace.
That is, agglomerate is iron ore and fusing assistant, i.e. CaO, SiO
2deng slag ingredient reaction melting, consolidated block generates.
In recent years, obvious especially to increasing of the demand of steel with the emerging nation headed by countries in Asia.Be accompanied by it and increase, the needs of the iron ore of the raw material of the agglomerate that the agglomerate of using as blast furnace and blast furnace are used are also in sustainable growth.
The growth of the demand of above-mentioned iron ore has caused the problem in the past not having.That is, start freely to select the quality of the iron ore supplied with.The situation of particularly supplying with iron ore that size-grade distribution deviation is large etc. is increasing.
And, as mentioned above, belong to the yield rate that realizes finished product of problem points all the time, the problem of the raising of productivity still exists.That is, now, because iron ore granularity deviation is large, require further to improve the manufacture efficiency of agglomerate.
At this, while manufacturing agglomerate, utilize and use the air in raw material layer that the coke breeze in raw material is burnt by agglomerate.That is, can say that its productivity is determined by the ventilation (air permeability) of raw material layer by agglomerate.In addition, air permeability is roughly divided for the cold aeration before the sintering that the particle diameter by iron ore etc. determines and the air flow circuit that generated by flowing of melt by being situated between is in the sintering that determines of the air vent aperture of sinter cake and the hot air permeability after sintering, cold aeration before the sintering being determined by the particle diameter of iron ore etc. is easily subject to the impact of deviation of the quality of above-mentioned iron ore raw material, becomes especially in recent years the large problem that affect productivity raising.
Summary of the invention
Yet, now to above-mentioned problem, inevitable effectively countermeasure is not proposed yet.
The present invention develops in view of above-mentioned present situation, and object is to provide inflation method and the agglomerate raw material powder of the agglomerate use raw material powder of using in a kind of blast furnace, even if when the particle diameter of iron ore raw material exists deviation, the manufacture efficiency of its agglomerate is also excellent.
The inventor etc. conduct in-depth research in order to solve above-mentioned problem.Its result has obtained following opinion: agglomerate is adjusted into certain scope by the ratio of mixture of the quality of the quality of the iron ore raw material of the regulation shape in raw material powder and the coke breeze of regulation shape, the raising of the manufacture efficiency of agglomerate is played to advantageous effect.; in the present invention; particularly for the cold aeration before sintering; the air permeability (JPU index) that has reached raw material powder for agglomerate in the excellent pallet agglomerate raw material of granulation the quasi-particle () by change the proterties of coke breeze according to the quality of iron ore raw material (particle diameter deviation), has realized the raising of the manufacture efficiency of agglomerate thus.
The present invention completes based on above-mentioned opinion, and main idea of the present invention is constructed as follows.
1. the inflation method of raw material powder for agglomerate, with after drum mixer mixing granulation, packs iron ore raw material, coke breeze and auxiliary material into sinter machine calcined and while manufacturing the agglomerate that blast furnace uses,
By the particle diameter in above-mentioned iron ore raw material: the particle diameter in iron ore raw materials quality (F) more than 3mm and above-mentioned coke breeze: the mixture ratio ((C/F) * 100) of coke breeze quality (C) more than 3mm is adjusted into 2～3% scope, carries out mixing granulation.
2. the inflation method by raw material powder according to agglomerate described in above-mentioned 1, wherein, making above-mentioned mixture ratio ((C/F) * 100) is 2.2～2.8% scope.
3. an agglomerate raw material powder, is the agglomerate raw material powder that the blast furnace that consists of iron ore raw material, coke breeze and auxiliary material is used,
Particle diameter in above-mentioned iron ore raw material: the particle diameter in iron ore raw materials quality (F) more than 3mm and above-mentioned coke breeze: the mixture ratio ((C/F) * 100) of coke breeze quality (C) more than 3mm is 2～3% scope.
4. according to the agglomerate raw material powder described in above-mentioned 3, wherein, the scope that above-mentioned mixture ratio ((C/F) * 100) is 2.2～2.8%.
By according to the present invention, even if there is deviation in the quality of iron ore raw material (size-grade distribution), also can reach the agglomerate of stablizing in the excellent pallet air permeability (JPU index) of raw material powder, therefore effectively realize the raising of the manufacture efficiency of agglomerate.
Accompanying drawing explanation
Fig. 1 means the figure of the mixture ratio ((C/F) * 100) of iron ore raw material and coke breeze and the relation of JPU.
Embodiment
Below, the present invention is specifically described.
In the present invention, iron ore raw material, coke breeze and auxiliary material are mixed with drum mixer, make agglomerate with after raw material powder, by raw material powder, pack this agglomerate into sinter machine and carry out sintering, manufacture thus the agglomerate that blast furnace is used.At this moment, as described below, particularly by being conceived to the particle diameter of iron ore raw material and coke breeze, suitably combine, productivity in the time of can maintaining sintering compared with highland, that is, compared with highland, maintain the air permeability (JPU index: be designated hereinafter simply as JPU) of raw material powder for agglomerate in the pallet of being obtained by following (1) formula.Should illustrate, the larger expression air permeability of numerical value of JPU is better, the viewpoint of the productivity when agglomerate is manufactured, and it is more than 22 that left and right is particularly preferred value.
(JPU)=(air quantity (m
3/ min)/calcining area (m
2)) (bed thickness (mm)/negative pressure (mmAq))
0.6(1)
Here, in formula,
Air quantity: by the agglomerate of certain calcining area, use the air quantity of raw material powder,
Calcining area: measure the stow area of raw material powder for the agglomerate of above-mentioned air quantity,
Bed thickness: the agglomerate bed thickness of raw material powder of measuring the position of air quantity,
Negative pressure: the air pressure of the bellows of raw material powder bottom for agglomerate.
1mmAq=9806.38Pa should be described.
In the present invention, particle diameter is to utilize the staging (JIS R6001 (1998)) of sieving to measure.
Should illustrate that spendable iron ore raw material in the present invention can be enumerated South America rhombohedral iron ore, North America rhombohedral iron ore, South America magnetite, Australian peastone ore deposit and horse traction mamba (MarraMamba) ore deposit etc.
Feature of the present invention is by the particle diameter in iron ore raw material: the particle diameter in iron ore raw materials quality (F) more than 3mm and coke breeze: the mixture ratio ((C/F) * 100) of coke breeze quality (C) more than 3mm is adjusted into 2～3% scope.The quality of the iron ore raw material while obtaining above-mentioned F is calculated by not comprising the mass fraction of returning mine.
For realize the mechanism of good JPU by controlling above-mentioned mixture ratio ((C/F) * 100), consider as follows.
Above-mentioned mixture ratio is little, be less than at 2 o'clock, represents with respect to coke breeze granularity, and the granularity of ore is large.Therefore, too small if the granularity of coke breeze becomes, although sintering velocity increases, the width in sintering melting zone also increases, and makes air permeability variation when hot.On the other hand, greatly, mixture ratio is greater than at 3 o'clock, the coarse size granulation of coke breeze, and in granulation process, the generation of the quasi-particle that the coke breeze of take is nuclear particle becomes significantly.The quasi-particle that the coke breeze of take is nuclear particle is because the wettability of coke breeze is low, so do not embody the intensity of quasi-particle, easily in the treating processes till being encased in pallet, crumbles, and its result, is encased in the quasi-particle grain refined of pallet, air permeability variation.
Therefore, have the proper range with respect to the coke breeze particle diameter of ore particle diameter, this scope can, with the value representation of C/F * 100, be as above 2～3%.Should illustrate, the preferable range of the value of above-mentioned C/F * 100 is 2.2～2.8%.
In the present invention, for auxiliary material, can enumerate the auxiliary material that Wingdale etc. contains CaO, nickel slag etc. contains SiO
2auxiliary material etc., be not particularly limited, also comprise the auxiliary material using in raw material powder for generally well-known agglomerate, the impurity of inevitably sneaking into.
In addition, as its mixture ratio, be decided to be the CaO/SiO in agglomerate
2(=basicity) is near 2.0.
The drum mixer using in the present invention, can consider drum mixer having round shape cone etc., can be also the common drum mixer using in the manufacture of agglomerate by raw material powder.
In addition, the sinter machine using in the present invention De Huaite-Selwyn Lloyd formula sinter machine that preferably below attracts.Can also use the sinter machine of raw material powder manufacture use for known agglomerate.
As mentioned above, by according to the present invention, can access the agglomerate raw material powder that the blast furnace of the manufacture efficiency excellence consisting of iron ore raw material, coke breeze and auxiliary material is used.
That is, can access the particle diameter in the iron ore raw material except returning mine: the particle diameter in iron ore raw materials quality (F) more than 3mm and coke breeze: the mixture ratio ((C/F) * 100) of coke breeze quality (C) more than 3mm is 2～3%, be preferably the agglomerate raw material powder of 2.2～2.8% scope.
Should illustrate, except above-mentioned special stipulation, the materials such as raw material powder, use equipment, the manufacture method such as its operating condition can be according to ordinary method.
Embodiment
(embodiment 1)
By condition shown below, adjusted agglomerate raw material powder.Then, use the agglomerate raw material powder obtaining, pack De Huaite-Selwyn Lloyd formula sinter machine filling that below attracts into, make agglomerate.JPU when this agglomerate of investigation sintering is used raw material powder, confirms effect of the present invention.
Iron ore raw material
The original unit of iron ore raw material: 1100～1200 (kg/t-sr)
The ratio of iron ore raw material more than 3mm: 30～40 (with respect to the per-cent of the raw material packing into) coke breeze
The original unit of coke breeze: 45～50 (kg/t-sr)
The ratio of coke breeze more than 3mm: 5～20 (with respect to the per-cents of coke breeze)
Mixture ratio ((C/F) * 100): 1.2～3.5%
Auxiliary material is Wingdale: 6～10 (with respect to the per-cents of the raw material packing into)
The mixture ratio ((C/F) * 100) of the iron ore raw material shown in Fig. 1 more than 3mm and coke breeze more than 3mm and the relation of JPU.By this figure, the agglomerate of making by the mixture ratio ((C/F) * 100) that meets the scope of condition of the present invention shows the good value of 22 above degree with the JPU of raw material powder.
On the other hand, the agglomerate raw material powder of the discontented foot of mixture ratio ((C/F) * 100) condition of the present invention, as shown in Figure 1, JPU is 19～21 left and right,, below 21, JPU is poor.
(embodiment 2)
Embodiment when of the present invention to real machine use describes.
By the iron ore raw material using in common sintering circuit, from material storage yard, after automatic sampling, according to the JIS8706 of Japanese Industrial Standards, measure size-grade distribution.
For coke breeze, the screen underflow of the lump coke of manufacturing in common coke factory or the hard coal of buying are ground into the size-grade distribution that is suitable for operation in sintering factory, for sintering circuit.
Pulverize devices such as using rod mill, cage grinding machine, ball mill.Then, the coke breeze after pulverizing with the sampling thief sampling that is arranged at travelling belt connector portions, thereafter, dry with drying machine, with Ro-Tap formula screen(ing) machine, measure size-grade distribution.
According to the present invention, according to the granularity of the iron ore of buying, form, more than 3mm there is ratio, adjust the pulverization conditions of coke breeze, change the ratio that the exists more than 3mm in coke breeze.
In table 1, record in the lump more than 3mm iron ore raw material (ore) and the more than 3mm mixture ratio ((C/F) * 100) of coke breeze and the measurement result of JPU.Should illustrate, by coke composition, be that X (kg/t), ore I composition are that Y (kg/t), ore II composition are Z (kg/t), the ratio more than 3mm of coke is that the ratio more than 3mm of x (%), ore I is that more than the 3mm of y (%), ore II ratio is while being z (%), for C=X * x, F=Y * y+Z * z.
Table 1
According to table 1, the agglomerate of making by the mixture ratio ((C/F) * 100) that meets the scope of condition of the present invention shows the good numerical value of 22 above degree with the JPU of raw material powder.
On the other hand, the agglomerate raw material powder of the discontented foot of mixture ratio ((C/F) * 100) condition of the present invention, as shown in table 1, JPU is 19～21 left and right,, below 21, JPU is poor.
In addition, while thering is the production line of iron ore classification, pulverizing, can realize by adjusting the pulverization conditions of coke breeze and the coarse grain pulverization conditions of iron ore the mixture ratio of the C/F shown in inventive method.
Utilizability in industry
According to the present invention, can access the agglomerate raw material powder of the manufacture efficiency excellence of agglomerate.In addition, not only productivity improves, and improves because maintaining piece yield rate, the intensity of air permeability agglomerate, therefore, realizes the operation of stable and high efficiency blast furnace.
Claims (4)
1. the inflation method of raw material powder for agglomerate, is mixed, after granulation, is packed into sinter machine is calcined and while manufacturing the agglomerate that blast furnace uses by drum mixer for iron ore raw material, coke breeze and auxiliary material,
By the particle diameter in described iron ore raw material: iron ore raw materials quality F more than 3mm and the particle diameter in described coke breeze: the mixture ratio (C/F) * 100 of coke breeze quality C more than 3mm is adjusted into 2～3% scope, mix, granulation.
2. the inflation method of raw material powder for agglomerate according to claim 1, wherein, makes the scope that described mixture ratio (C/F) * 100 is 2.2～2.8%.
3. an agglomerate raw material powder, is the agglomerate raw material powder that the blast furnace that consists of iron ore raw material, coke breeze and auxiliary material is used,
Particle diameter in described iron ore raw material: iron ore raw materials quality F more than 3mm and the particle diameter in described coke breeze: the scope that the mixture ratio (C/F) * 100 of coke breeze quality C more than 3mm is 2～3%.
4. agglomerate raw material powder according to claim 3, wherein, the scope that described mixture ratio (C/F) * 100 is 2.2～2.8%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012066244 | 2012-03-22 | ||
| JP2012-066244 | 2012-03-22 | ||
| PCT/JP2013/001933 WO2013140809A1 (en) | 2012-03-22 | 2013-03-21 | Method for adjusting precursor powder for sintering, and precursor powder for sintering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104204242A true CN104204242A (en) | 2014-12-10 |
| CN104204242B CN104204242B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380015278.XA Active CN104204242B (en) | 2012-03-22 | 2013-03-21 | The method of adjustment of sintering deposit raw material powder and sintering deposit raw material powder |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20150047466A1 (en) |
| EP (1) | EP2829619B1 (en) |
| JP (1) | JP5505579B2 (en) |
| KR (1) | KR101525067B1 (en) |
| CN (1) | CN104204242B (en) |
| AU (1) | AU2013236699B2 (en) |
| BR (1) | BR112014023430B1 (en) |
| PH (1) | PH12014502031B1 (en) |
| TW (1) | TWI471419B (en) |
| WO (1) | WO2013140809A1 (en) |
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| JPS53118215A (en) * | 1977-03-26 | 1978-10-16 | Sumitomo Metal Ind Ltd | Sintering method |
| EP0207654A1 (en) * | 1985-06-27 | 1987-01-07 | Nippon Kokan Kabushiki Kaisha | Method for continuously manufacturing fired pellets |
| CN1696318A (en) * | 2000-05-29 | 2005-11-16 | 杰富意钢铁株式会社 | Raw material for sintering in form of pseudo grain and method for producing the same |
| JP2008019455A (en) * | 2006-07-10 | 2008-01-31 | Jfe Steel Kk | Method for producing half-reduced sintered ore |
| CN101928824A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sinter production method for reducing sintering solid burnup and enhancing intensity |
Family Cites Families (11)
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| US1770688A (en) * | 1929-04-08 | 1930-07-15 | Witt Clyde C De | Molding material |
| JPS63149333A (en) * | 1986-12-15 | 1988-06-22 | Nkk Corp | Coating method for powdery coke on green pellet for burnt agglomerated ore |
| JPH089739B2 (en) * | 1989-08-23 | 1996-01-31 | 日本鋼管株式会社 | Method for producing calcined agglomerated ore |
| JPH08120350A (en) * | 1994-10-25 | 1996-05-14 | Nippon Steel Corp | Production of sintered ore excellent in high temperature reduction and softening/melting properties |
| JP3731361B2 (en) * | 1998-12-25 | 2006-01-05 | Ｊｆｅスチール株式会社 | Method for producing sintered ore |
| JP3879408B2 (en) * | 2001-01-31 | 2007-02-14 | Ｊｆｅスチール株式会社 | Method for producing sintered ore and sintered ore |
| KR100587709B1 (en) * | 2003-03-20 | 2006-06-08 | 가부시키가이샤 고베 세이코쇼 | manufacturing process for sintered ore |
| JP5004421B2 (en) * | 2004-09-17 | 2012-08-22 | Ｊｆｅスチール株式会社 | Method for producing sintered ore |
| JP4661154B2 (en) * | 2004-10-01 | 2011-03-30 | Ｊｆｅスチール株式会社 | Method for producing sintered ore |
| JP5063978B2 (en) * | 2006-10-20 | 2012-10-31 | 新日本製鐵株式会社 | Granulation method of sintering raw material |
| CN102206744B (en) * | 2010-03-29 | 2013-04-10 | 攀钢集团钢铁钒钛股份有限公司 | Method for granulating sinter mixture |
-
2013
- 2013-03-21 EP EP13764065.2A patent/EP2829619B1/en active Active
- 2013-03-21 WO PCT/JP2013/001933 patent/WO2013140809A1/en active Application Filing
- 2013-03-21 JP JP2013556704A patent/JP5505579B2/en active Active
- 2013-03-21 BR BR112014023430-2A patent/BR112014023430B1/en active IP Right Grant
- 2013-03-21 CN CN201380015278.XA patent/CN104204242B/en active Active
- 2013-03-21 AU AU2013236699A patent/AU2013236699B2/en active Active
- 2013-03-21 US US14/386,067 patent/US20150047466A1/en not_active Abandoned
- 2013-03-21 KR KR1020147028653A patent/KR101525067B1/en active IP Right Grant
- 2013-03-22 TW TW102110274A patent/TWI471419B/en not_active IP Right Cessation
-
2014
- 2014-09-12 PH PH12014502031A patent/PH12014502031B1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53118215A (en) * | 1977-03-26 | 1978-10-16 | Sumitomo Metal Ind Ltd | Sintering method |
| EP0207654A1 (en) * | 1985-06-27 | 1987-01-07 | Nippon Kokan Kabushiki Kaisha | Method for continuously manufacturing fired pellets |
| CN1696318A (en) * | 2000-05-29 | 2005-11-16 | 杰富意钢铁株式会社 | Raw material for sintering in form of pseudo grain and method for producing the same |
| JP2008019455A (en) * | 2006-07-10 | 2008-01-31 | Jfe Steel Kk | Method for producing half-reduced sintered ore |
| CN101928824A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sinter production method for reducing sintering solid burnup and enhancing intensity |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013140809A8 (en) | 2014-10-16 |
| AU2013236699A1 (en) | 2014-10-09 |
| JPWO2013140809A1 (en) | 2015-08-03 |
| EP2829619A1 (en) | 2015-01-28 |
| AU2013236699B2 (en) | 2015-04-09 |
| PH12014502031A1 (en) | 2014-11-24 |
| WO2013140809A1 (en) | 2013-09-26 |
| TW201339313A (en) | 2013-10-01 |
| EP2829619B1 (en) | 2017-03-01 |
| JP5505579B2 (en) | 2014-05-28 |
| US20150047466A1 (en) | 2015-02-19 |
| EP2829619A4 (en) | 2015-05-27 |
| KR20140134326A (en) | 2014-11-21 |
| BR112014023430B1 (en) | 2019-05-14 |
| TWI471419B (en) | 2015-02-01 |
| CN104204242B (en) | 2016-08-24 |
| KR101525067B1 (en) | 2015-06-02 |
| PH12014502031B1 (en) | 2014-11-24 |
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