CN106222401A - The preparation method of pellet - Google Patents
The preparation method of pellet Download PDFInfo
- Publication number
- CN106222401A CN106222401A CN201610843914.3A CN201610843914A CN106222401A CN 106222401 A CN106222401 A CN 106222401A CN 201610843914 A CN201610843914 A CN 201610843914A CN 106222401 A CN106222401 A CN 106222401A
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- CN
- China
- Prior art keywords
- pellet
- ball
- iron ore
- ore concentrate
- green
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Abstract
The present invention discloses the preparation method of a kind of pellet, comprising: step 1, by the stanniferous iron ore concentrate of 96～99.9 weight portions and the additive mix homogeneously of 0.1～4 weight portions, balling disk (-sc) is made the green-ball of a diameter of 8～16mm；Step 2, green-ball drying, preheating, roasting are obtained finished ball nodulizing.The method is by being mixed with pellet by stanniferous iron ore concentrate and additive, decrease the Theil indices in pellet to a certain extent, decrease and bring stannum into due to pellet and make the penalty of steel, ensure that the pellet comprcssive strength produced is more than 2000N/ simultaneously, reduction swellability rate is less than 20%, makes blast furnace stable smooth operation.Further, owing to stanniferous iron ore concentrate price is relatively low, the method is therefore used can to effectively reduce the production cost of pellet.
Description
Technical field
The present invention relates to metallurgical briquetting ore deposit production field, particularly to the preparation method of a kind of pellet.
Background technology
Stannum is one of impurity element common in iron and steel, the when that tin element content in steel being more than a threshold quantity, just
Can substantially reduce the high-temperature mechanical property of steel, increase the high-temperature brittleness of steel, reduce intensity and the toughness of steel, make steel become fragile.And contain
Tin element in stannum iron ore concentrate is all difficult to remove in pelletizing process, blast furnace iron-making process, and the overwhelming majority can be stayed in molten iron, refining
During steel, stannum can only be in the most oxidized entrance slag.At present, the method that stanniferous iron ore concentrate prepares pellet is used
Mainly use minimal amount of stanniferous iron ore concentrate to use with the collocation of other the most stanniferous iron ore concentrates, thus reduce the Theil indices in steel,
Reduce the harm that the performance of steel is produced by stannum, but this adds the cost of production the most undoubtedly.
Summary of the invention
In view of this, in order to solve above technical problem, the present invention provides the preparation method of a kind of pellet.
The present invention provides the preparation method of a kind of pellet, comprising:
Step 1, by the stanniferous iron ore concentrate of 96～99.9 weight portions and the additive mix homogeneously of 0.1～4 weight portions, making
The green-ball of a diameter of 8～16mm is made on ball dish；
Including of described stanniferous iron ore concentrate: the TFe of 64.5～67.0 weight portions, 24.5～28.0 weight portion FeO, 1.05
～2.20 CaO, 2.80～4.50 SiO of weight portion of weight portion2, 0.35～0.75 MgO, 0.15～0.45 weight of weight portion
Part Sn, 0.003～0.20 S, 0.03～0.20 K of weight portion of weight portion2O；
Including of described additive: the CaO of 3.5～7.0 weight portions, 56.5～65.5 SiO of weight portion2, 1.8～3.5
The MgO of weight portion, 11.5～15.5 Al of weight portion2O3；
Step 2, green-ball drying, preheating, roasting are obtained finished ball nodulizing；
Described dry temperature is 100～120 DEG C, and the time is 30～60min；The temperature of described preheating is 480～750
DEG C, the time is 8～16min；The temperature of described roasting is 1180～1320 DEG C, and the time is 8～25min.
Further, the granularity of described stanniferous iron ore concentrate is-200 mesh.
Further, in described stanniferous iron ore concentrate, the content of impurity is 8%～20%.
Further,
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 99:1；Described green-ball a diameter of 10～16mm,
Comprcssive strength is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is at 600 DEG C
Lower preheating 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
Further, in the pellet prepared, the mass percentage content of TFe is 63.70%, the mass percent of FeO
Content is 3.23%, CaO and SiO2Mass percentage content be respectively 2.15% and 3.71%, the mass percentage content of Sn
It is 0.139%；Being 20% according to blast furnace feeding pellet ratio, in steel, Sn content is about 364ppm, and pelletizing comprcssive strength is
2633N/, reduction swellability coefficient is 19.8%.
Further,
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 97.6:2.4, described green-ball a diameter of 10～
16mm, comprcssive strength is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is at 600 DEG C
Lower preheating 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
Further, in the pellet prepared, the mass percentage content of TFe is 63.15%, the mass percent of FeO
Content is 3.72%, CaO and SiO2Mass percentage content be respectively 2.27% and 4.41%, the mass percentage content of Sn
It is 0.113%；Being 20% according to blast furnace feeding pellet ratio, in steel, Sn content is 260ppm, and pelletizing comprcssive strength is
2320N/, reduction swellability coefficient is 12.9%.
The present invention provides the preparation of a kind of pellet, and the method is by being mixed with pelletizing by stanniferous iron ore concentrate and additive
Ore deposit, decreases the Theil indices in pellet to a certain extent, decreases and brings stannum into due to pellet and make the penalty of steel, with
Time ensure that the pellet comprcssive strength produced is less than 20% more than 2000N/, reduction swellability rate, makes blast furnace stable smooth operation.And
And, owing to stanniferous iron ore concentrate price is relatively low, therefore use the method can effectively reduce the production cost of pellet.
Detailed description of the invention
The invention discloses the preparation method of a kind of pellet, those skilled in the art can use for reference present disclosure, suitably
Improvement technological parameter realizes.Special needs to be pointed out is, all similar replacements and change are for a person skilled in the art
It will be apparent that they are considered as being included in the present invention.Method and the application of the present invention are carried out by preferred embodiment
Describe, related personnel substantially can in without departing from present invention, spirit and scope to method described herein and apply into
Row is changed or suitably change and combination, realizes and applies the technology of the present invention.
The present invention provides the preparation method of a kind of pellet, and it includes the following:
Step 1, by the stanniferous iron ore concentrate of 96～99.9 weight portions and the additive mix homogeneously of 0.1～4 weight portions, making
The green-ball of a diameter of 8～16mm is made on ball dish；
Including of described stanniferous iron ore concentrate: the TFe of 64.5～67.0 weight portions, 24.5～28.0 weight portion FeO, 1.05
～2.20 CaO, 2.80～4.50 SiO of weight portion of weight portion2, 0.35～0.75 MgO, 0.15～0.45 weight of weight portion
Part Sn, 0.003～0.20 S, 0.03～0.20 K of weight portion of weight portion2O；
Including of described additive: the CaO of 3.5～7.0 weight portions, 56.5～65.5 SiO of weight portion2, 1.8～3.5
The MgO of weight portion, 11.5～15.5 Al of weight portion2O3；
Step 2, green-ball drying, preheating, roasting are obtained finished ball nodulizing；
Described dry temperature is 100～120 DEG C, and the time is 30～60min；The temperature of described preheating is 480～750
DEG C, the time is 8～16min；The temperature of described roasting is 1180～1320 DEG C, and the time is 8～25min.
Preferably, the granularity of above-mentioned stanniferous iron ore concentrate is-200 mesh.The most described stanniferous iron ore concentrate can leak from the mesh of 200 mesh
Cross；In other words, mesh number is more than 200 mesh.
It will be understood by those skilled in the art that described stanniferous iron ore concentrate can inevitably contain impurity, in the present invention, miscellaneous
The content of matter is preferably 8%～20%.
As a preferred version of the present invention,
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 99:1；Described green-ball a diameter of 10～16mm,
Comprcssive strength is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is at 600 DEG C
Lower preheating 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
Further, in the pellet prepared, the mass percentage content of TFe is 63.70%, the mass percent of FeO
Content is 3.23%, CaO and SiO2Mass percentage content be respectively 2.15% and 3.71%, the mass percentage content of Sn
It is 0.139%；Being 20% according to blast furnace feeding pellet ratio, in steel, Sn content is about 364ppm, and pelletizing comprcssive strength is
2633N/, reduction swellability coefficient is 19.8%.
Another preferred version as the present invention:
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 97.6:2.4, described green-ball a diameter of 10～
16mm, comprcssive strength is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is at 600 DEG C
Lower preheating 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
Further, in the pellet prepared, the mass percentage content of TFe is 63.15%, the mass percent of FeO
Content is 3.72%, CaO and SiO2Mass percentage content be respectively 2.27% and 4.41%, the mass percentage content of Sn
It is 0.113%；Being 20% according to blast furnace feeding pellet ratio, in steel, Sn content is 260ppm, and pelletizing comprcssive strength is
2320N/, reduction swellability coefficient is 12.9%.
The present invention provides the preparation of a kind of pellet, and the method is by being mixed with pelletizing by stanniferous iron ore concentrate and additive
Ore deposit, decreases the Theil indices in pellet to a certain extent, decreases and brings stannum into due to pellet and make the penalty of steel, with
Time ensure that the pellet comprcssive strength produced is less than 20% more than 2000N/, reduction swellability rate, makes blast furnace stable smooth operation.And
And, owing to stanniferous iron ore concentrate price is relatively low, therefore use the method can effectively reduce the production cost of pellet.
Below in conjunction with embodiment, the present invention it is expanded on further:
In following example, utilize stanniferous iron ore concentrate to prepare the chemical composition of raw material used for pellet and granularmetric composition is shown in Table
1。
Raw materials used composition and granularmetric composition (wt%) in each embodiment of table 1
| Title | TFe | FeO | CaO | SiO2 | F | S | MgO | Al2O3 | Sn | Impurity | Mesh number |
| Stanniferous iron ore concentrate | 66.46 | 27.60 | 2.01 | 3.32 | 0.14 | 0.005 | 0.611 | 0.737 | 0.193 | 16.2 | -200 |
| Additive | -- | -- | 6.25 | 58.95 | -- | -- | 3.18 | 14.03 | -- | 5 | -200 |
Embodiment 1
1, according to mass percent, stanniferous iron ore concentrate 99% and additive 1% are carried out dispensing mix homogeneously, in pelletizing
Balling-up in dish, obtains green-ball, green-ball a diameter of 10～16mm, and compression strength of green pel let is 9～17N/；
2, green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；
3, dry bulb preheats 8min at a temperature of 600 DEG C, obtains pre-hot-bulb；
4, pre-hot-bulb is at 1220 DEG C of roasting temperatures, i.e. obtains finished ball nodulizing after roasting 10min.
In the pellet prepared, the mass percentage content of TFe is 63.70%, and the mass percentage content of FeO is
3.23%, CaO and SiO2Mass percentage content be respectively 2.15% and 3.71%, the mass percentage content of Sn is
0.139%, it is 20% according to blast furnace feeding pellet ratio, in steel, Sn content is about 364ppm, and pelletizing comprcssive strength is
2633N/, reduction swellability coefficient is 19.8%.
Embodiment 2
1, according to mass percent, stanniferous iron ore concentrate 97.6% and additive 2.4% are carried out dispensing mix homogeneously,
Balling-up in balling disk (-sc), obtains green-ball, green-ball a diameter of 10～16mm, and compression strength of green pel let is 9～17N/；
2, green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；
3, dry bulb preheats 8min at a temperature of 600 DEG C, obtains pre-hot-bulb；
4, pre-hot-bulb is at 1220 DEG C of roasting temperatures, i.e. obtains finished ball nodulizing after roasting 10min.
In the pellet prepared, the mass percentage content of TFe is 63.15%, and the mass percentage content of FeO is
3.72%, CaO and SiO2Mass percentage content be respectively 2.27% and 4.41%, the mass percentage content of Sn is
0.113%, it is 20% according to blast furnace feeding pellet ratio, in steel, Sn content is about 260ppm, and pelletizing comprcssive strength is
2320N/, reduction swellability coefficient is 12.9%, can meet production requirement.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. the preparation method of a pellet, it is characterised in that including:
Step 1, by the stanniferous iron ore concentrate of 96～99.9 weight portions and the additive mix homogeneously of 0.1～4 weight portions, at balling disk (-sc)
On make the green-ball of a diameter of 8～16mm；
Including of described stanniferous iron ore concentrate: the TFe of 64.5～67.0 weight portions, 24.5～28.0 weight portion FeO, 1.05～
The CaO of 2.20 weight portions, 2.80～4.50 SiO of weight portion2, 0.35～0.75 MgO, 0.15～0.45 weight portion of weight portion
Sn, 0.003～0.20 S, 0.03～0.20 K of weight portion of weight portion2O；
Including of described additive: the CaO of 3.5～7.0 weight portions, 56.5～65.5 SiO of weight portion2, 1.8～3.5 weight portions
MgO, 11.5～15.5 Al of weight portion2O3；
Step 2, green-ball drying, preheating, roasting are obtained finished ball nodulizing；
Described dry temperature is 100～120 DEG C, and the time is 30～60min；The temperature of described preheating is 480～750 DEG C, time
Between be 8～16min；The temperature of described roasting is 1180～1320 DEG C, and the time is 8～25min.
The preparation method of pellet the most according to claim 1, it is characterised in that the granularity of described stanniferous iron ore concentrate is-
200 mesh.
The preparation method of pellet the most according to claim 1, it is characterised in that in described stanniferous iron ore concentrate, impurity contains
Amount is 8%～20%.
The preparation method of pellet the most according to claim 1, it is characterised in that
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 99:1；Described green-ball a diameter of 10～16mm, resistance to compression
Intensity is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is pre-at 600 DEG C
Hot 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
The preparation method of pellet the most according to claim 4, it is characterised in that in prepared pellet, the quality of TFe
Degree is 63.70%, and the mass percentage content of FeO is 3.23%, CaO and SiO2Mass percentage content respectively
Being 2.15% and 3.71%, the mass percentage content of Sn is 0.139%；It is 20% according to blast furnace feeding pellet ratio, steel
Middle Sn content is about 364ppm, and pelletizing comprcssive strength is 2633N/, and reduction swellability coefficient is 19.8%.
The preparation method of pellet the most according to claim 1, it is characterised in that
In described step 1, the weight ratio of stanniferous iron ore concentrate and additive is 97.6:2.4, described green-ball a diameter of 10～16mm,
Comprcssive strength is 9～17N/；
In described step 2, described green-ball dries 40min at a temperature of 120 DEG C, obtains dry bulb；Described dry bulb is pre-at 600 DEG C
Hot 8min obtains pre-hot-bulb, described pre-hot-bulb roasting at 1220 DEG C, obtains finished ball nodulizing after roasting 10min.
The preparation method of pellet the most according to claim 6, it is characterised in that in prepared pellet, the quality of TFe
Degree is 63.15%, and the mass percentage content of FeO is 3.72%, CaO and SiO2Mass percentage content respectively
Being 2.27% and 4.41%, the mass percentage content of Sn is 0.113%；It is 20% according to blast furnace feeding pellet ratio, steel
Middle Sn content is 260ppm, and pelletizing comprcssive strength is 2320N/, and reduction swellability coefficient is 12.9%.
Priority Applications (1)
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| CN201610843914.3A CN106222401A (en) | 2016-09-21 | 2016-09-21 | The preparation method of pellet |
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|---|---|---|---|
| CN201610843914.3A CN106222401A (en) | 2016-09-21 | 2016-09-21 | The preparation method of pellet |
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ID=58076484
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| CN201610843914.3A Pending CN106222401A (en) | 2016-09-21 | 2016-09-21 | The preparation method of pellet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699688A (en) * | 2017-09-30 | 2018-02-16 | 徐州市伟华炉料有限公司 | A kind of high-phosphorus iron ore sphere of powder group |
| CN108004396A (en) * | 2017-11-28 | 2018-05-08 | 酒泉钢铁(集团)有限责任公司 | One kind utilizes nickel slag production acidic oxidation pellet method |
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| CN104152671A (en) * | 2014-07-21 | 2014-11-19 | 中南大学 | Method for preparing iron ore concentrate for ironmaking from tin-containing iron ore |
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2016
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| CN1924032A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Method of producing acidic pellet ore for blast furnace from tin-zinc magnetic concentrate |
| CN1924037A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Method of comprehensive utilizing tin-zinc containing magnetic concentrate |
| CN104152671A (en) * | 2014-07-21 | 2014-11-19 | 中南大学 | Method for preparing iron ore concentrate for ironmaking from tin-containing iron ore |
| CN105603178A (en) * | 2016-03-14 | 2016-05-25 | 中南大学 | Method for preparing tin-iron coarse alloy powder from tin containing iron ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699688A (en) * | 2017-09-30 | 2018-02-16 | 徐州市伟华炉料有限公司 | A kind of high-phosphorus iron ore sphere of powder group |
| CN108004396A (en) * | 2017-11-28 | 2018-05-08 | 酒泉钢铁(集团)有限责任公司 | One kind utilizes nickel slag production acidic oxidation pellet method |
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Application publication date: 20161214 |