CN108929927A - A kind of blast furnace smelting method of the vanadium titano-magnetite of high proportion pellet ore - Google Patents
A kind of blast furnace smelting method of the vanadium titano-magnetite of high proportion pellet ore Download PDFInfo
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- CN108929927A CN108929927A CN201810952882.XA CN201810952882A CN108929927A CN 108929927 A CN108929927 A CN 108929927A CN 201810952882 A CN201810952882 A CN 201810952882A CN 108929927 A CN108929927 A CN 108929927A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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Abstract
The present invention provides a kind of blast furnace smelting methods of the vanadium titano-magnetite of high proportion pellet ore, which is characterized in that the furnace charge in the blast furnace ironmaking process includes: pellet, common lump ore and steel slag.The present invention is directed to the vanadium titano-magnetite blast furnace process of high proportion pellet ore, cancel sinter used in blast furnace ironmaking process, common lump ore and steel slag with addition of 5~15% again, realize the intensification of smelting process in BF of vanadium titano-magnetite, a kind of recoverying and utilizing method of steel slag is also provided simultaneously, the blast furnace smelting method production cost of vanadium titano-magnetite provided by the invention is low, good in economic efficiency.
Description
Technical field
The present invention relates to vanadium titano-magnetite technical field more particularly to a kind of height of the vanadium titano-magnetite of high proportion pellet ore
Furnace smelting process.
Background technique
The common method of v-bearing titanomagnetite smelting is that sefstromite concentrate and common miberal powder are sintered output sinter, vanadium titanium
Iron ore concentrate and bentonite pelletizing produce oxide pellet, then according to a certain percentage sinter, pellet and a small amount of lump ore, with
Coke is added to inside blast furnace together, and blowing air down combustion of coke generates reducing gas, and reducing gas rises the decline with furnace charge
Restore ore, then fusing drops onto cupola well and completes ironmaking smelting process, realizes the separation of slag, iron.
The smelting process of vanadium iron magnetite used by the prior art needs how to reduce using sinter, higher cost
The cost of v-bearing titanomagnetite smelting becomes the hot spot of those skilled in the art's research.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of blast furnace process sides of the vanadium iron magnetite of high proportion pellet ore
Method, the blast furnace smelting method of vanadium titano-magnetite provided by the invention do not use sinter, and the ratio of pellet is very high, uses simultaneously
Steel slag can significantly reduce the smelting cost of vanadium titano-magnetite.
The present invention provides a kind of blast furnace smelting method of the vanadium titano-magnetite of high proportion pellet ore, the blast furnace process mistake
The furnace charge used in journey includes: pellet, common lump ore and steel slag.
In the present invention, the raw material for preparing of the pellet preferably includes v-ti magnetite concentrate, binder and flux.
The present invention does not have special limitation to the type of the sefstromite concentrate and source, ripe using those skilled in the art
The sefstromite concentrate known.In the present invention, TiO in the vanadium iron iron ore concentrate2Mass content be preferably 10~13%, more
Preferably 11~12%.
In the present invention, the binder is preferably bentonite.
In the present invention, the flux is preferably quick lime.
In the present invention, the mass ratio of the v-ti magnetite concentrate, binder and flux is preferably (80~90): (1.5~
3.0): (5~10)；More preferably (82~88): (2~2.5): (6~9), most preferably (84~86): (2.2~2.3): (7
~8).
In the present invention, the ingredient of the pellet preferably includes: TFe (full iron), SiO2、CaO、MgO、Al2O3、V2O5With
TiO2.In the present invention, mass content of the TFe in pellet is preferably 52~57%, and more preferably 53~56%, most
Preferably 54~55%；SiO2Mass content in pellet is preferably 4~7%, and more preferably 5~6%；CaO is in pelletizing
Mass content in mine is preferably 1~4%, and more preferably 2~3%；Mass content of the MgO in pellet be preferably 1~
4%, more preferably 2~3%；Al2O3Mass content in pellet is preferably 1~3%, and more preferably 1.5~2.5%, most
Preferably 2%；V2O5Mass content in pellet is preferably 0.5~0.8%, and more preferably 0.6~0.7%；TiO2In ball
Mass content in nodulizing is preferably 8~13%, and more preferably 9~12%, most preferably 10~11%.
In the present invention, the basicity (CaO/SiO of the pellet2) it is preferably 0.3~0.8, more preferably 0.4~0.7,
Most preferably 0.5~0.6.
In the present invention, the preparation method of the pellet is preferred are as follows:
Sefstromite concentrate, binder and flux are mixed, mixture is obtained；
Pelletizing after the mixture and water are mixed, obtains pelletizing；
The pelletizing is dried, preheated and roasted, pellet is obtained.
In the present invention, the type and usage ratio and above-mentioned technical proposal of the vanadium iron iron ore concentrate, binder and flux
The sefstromite concentrate, binder and the type of flux are consistent with usage ratio, and details are not described herein.
In the present invention, the granularity of the pelletizing is preferably 10~16mm, more preferably 11~15mm, most preferably 12~
14mm.In the present invention, the mass content of moisture is preferably 8.0~9.5% in the pelletizing, and more preferably 8.5~9%, most
Preferably 8.7~8.8%.In the present invention, the pelletizing drop strength preferably >=6 times.In the present invention, the pelletizing
Compression strength index preferably >=1.5kg.
In the present invention, the temperature of the drying is preferably 500~600 DEG C, and more preferably 520~580 DEG C, most preferably
540~560 DEG C.In the present invention, the temperature of the preheating is preferably 800~1000 DEG C, more preferably 850~950 DEG C, optimal
It is selected as 900 DEG C.In the present invention, the temperature of the roasting is preferably 1200~1250 DEG C, and more preferably 1210~1240 DEG C, most
Preferably 1220~1230 DEG C.
In the present invention, the common lump ore preferably includes: TFe (full iron), SiO2, CaO, MgO and Al2O3.In the present invention
In, the mass content of TFe (full iron) is preferably 40~50% in the common lump ore, and more preferably 42~48%, most preferably
44~46%；SiO2Mass content be preferably 15~25%, more preferably 18~22%, most preferably 20%；The quality of CaO
Content is preferably 1~3%, and more preferably 1.5~2.5%, most preferably 2%；The mass content of MgO is preferably 1~3%, more
Preferably 1.5~2.5%, most preferably 2%；Al2O3Mass content be preferably 1~3%, more preferably 1.5~2.5%, most
Preferably 2%.In the present invention, the common nugget is free of vanadium and titanium elements.
In the present invention, the granularity of the common lump ore is preferably 10~50mm, more preferably 20~40mm, most preferably
25~35mm.
In the present invention, the steel slag preferably includes: TFe (full iron), SiO2、CaO、MgO、Al2O3、V2O5And TiO2.?
In the present invention, the mass content of TFe (full iron) is preferably 20~30% in the steel slag, and more preferably 22~28%, most preferably
It is 24~26%；The mass content of CaO is preferably 35~40%, and more preferably 36~39%, most preferably 37~38%；SiO2
Mass content be preferably 10~12%, more preferably 11%；The mass content of MgO is preferably 10~15%, and more preferably 11
~14%, most preferably 12~13%；Al2O3Mass content be preferably 1~4%, more preferably 2~3%；V2O5Quality
Content is preferably 0.8~2%, and more preferably 1~1.8%, most preferably 1.4~1.6%；TiO2Mass content be preferably 1
~2%, more preferably 1.2~1.8%, most preferably 1.4~1.6%.
In the present invention, the granularity of the steel slag is preferably 10~50mm, more preferably 20~40mm, most preferably 25~
35mm。
In the present invention, the mass ratio of the pellet, common lump ore and steel slag is preferably (70~85): (5~25): (5
~15), more preferably (75~80): (10~20): (8~12), most preferably (77~78): (14~16): 10.
In the present invention, the wind-warm syndrome in the blast furnace ironmaking process is preferably 1200~1250 DEG C, more preferably 1210~
1240 DEG C, most preferably 1220~1230 DEG C.
In the present invention, the oxygen enrichment percentage in the blast furnace ironmaking process is preferably 2~8%, and more preferably 3~6%, it is optimal
It is selected as 4~5%.
In the present invention, the mass content of Ti is preferably 0.1~0.2% in molten iron in the blast furnace ironmaking process, more excellent
It is selected as 0.12~0.18%, most preferably 0.14~0.16%；The mass content of V is preferably 0.3~0.4% in molten iron, more excellent
It is selected as 0.32~0.38%, most preferably 0.34~0.36%；TiO in clinker2Mass content be preferably 22~24%, it is more excellent
It is selected as 22.5~23.5%, most preferably 23%.
Present invention is generally directed to the vanadium titano-magnetite blast furnace process of high proportion pellet ore, by vanadium ilmenite concentrate with addition of flux and
Bentonite produces vanadium-titanium pellet, cancels sinter, then with addition of 5~15% common lump ore and steel slag, pass through high wind-warm syndrome, Gao Fu
The intensification of smelting process in BF of oxygen rate realization vanadium titano-magnetite.
The present invention provides a kind of blast-furnace smelting method for vanadium titano-magnetite of high pellet ratio, are related to a kind of vanadium titanium magnetic
The smelting process of iron ore, the present invention solve a kind of utilization method for making steel high CaO steel slag.Vanadium titano-magnetite provided by the invention
Blast furnace smelting method furnace charge used in smelting process be made of vanadium-titanium pellet and the high silicon ore of common low iron and steel slag,
Vanadium-titanium pellet is the pellet that vanadium iron iron ore concentrate and flux mixture roast, and the common low high silicon ore of iron is without vanadium unit
The iron ore of element and titanium elements.The present invention by blast furnace ironmaking process with addition of 5~25% common lump ore and 5~15 steel
Slag, and at 1200~1250 DEG C of wind-warm syndrome, oxygen enrichment percentage 2~8%, TiO in clinker2Under conditions of 22~24%, control was smelted
The mass content that the mass content of Ti is 0.1~0.2%, V in journey is 0.3~0.4.The present invention can be realized carry out v-ti magnetite
Sinter is not used in mine blast furnace ironmaking process and be added steel slag it is critical that by pellet, common lump ore and steel slag into
The reasonable proportion of row, while cooperating using the blast furnace smelting process parameter for being directed to this special burden structure, i.e., in wind-warm syndrome 1200
~1250 DEG C, oxygen enrichment percentage be 2~8%, TiO in clinker2Content is 22~24%, and the content of Ti is 0.1~0.2, V's in molten iron
It is smelted under the conditions of the composite technology that content is 0.3~0.4, realizes the intensification of smelting process in BF of vanadium titano-magnetite.
The present invention is by, with addition of pellet, common lump ore and steel slag, and passing through high wind-warm syndrome, height in blast furnace ironmaking process
The measure of oxygen enrichment percentage, in clinker TiO2Content is up under conditions of 22~24%, realizes the strengthening smelting of vanadium titano-magnetite.
Panxi Diqu has v-ti magnetite ore resources abundant, contains TiO2Content is up to 10~13%, and the present invention is by vanadium titanium
Magnetic iron ore is produced into pellet, with addition of a small amount of common lump ore of the high silicon of low iron and slag produced from steel-smelting, and using high wind-warm syndrome, big oxygen-enriched skill
Art, to realize the strengthening smelting of blast furnace.Using the blast furnace process of the vanadium titano-magnetite of high proportion pellet ore provided by the invention
Method can reduce production cost, have significant economic benefit.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff it is improved or retouching all other example, shall fall within the protection scope of the present invention.
Raw materials used following embodiment of the present invention is commercial goods, and the ingredient of the vanadium ilmenite concentrate powder used includes: TFe
53.7wt%, SiO24.03wt%, CaO 1.12wt%, MgO 2.56wt%, TiO212.35wt%, V2O5
0.568wt%；
The ingredient of common lump ore includes: TFe44.09wt%, SiO222.05wt%, CaO 1.93wt%, MgO
0.90wt%；
The ingredient of steel slag includes: TFe 25.23wt%, SiO211.21wt%, CaO 38.78wt%, MgO
12.2wt%, TiO21.05wt%, V2O51.12wt%.
Embodiment 1
Vanadium ilmenite concentrate powder, bentonite and quick lime that mass ratio is 85:2:8 are mixed, mixture is obtained；
Pelletizing after the mixture and water are mixed, obtains pelletizing；Granularity is the pelletizing number of 10~16mm in the pelletizing
Amount is greater than 90%, and the moisture content in pelletizing is 9%；Drop strength >=6 time of the pelletizing, compression strength index >=1.5kg.
The pelletizing is dried, dry temperature is 550 DEG C, is roasted after then preheating, the temperature of the preheating is
900 DEG C, the temperature of roasting is 1220 DEG C, obtains pellet.
The ingredient for the pellet that the embodiment of the present invention 1 is prepared includes: TFe 53.2wt%, SiO24.53wt%,
CaO 1.02wt%, MgO 2.42wt%, TiO212.03wt%, V2O50.56wt%；
By it is above-mentioned be prepared pellet, common lump ore and steel slag be in mass ratio 70:22:8 ingredient be added blast furnace into
Row is smelted, the specific process parameter in smelting process are as follows: wind-warm syndrome is 1220 DEG C, oxygen enrichment percentage 6%, controls molten iron in smelting process
The mass content that the mass content of middle Ti is 0.15%, V is 0.35%, TiO in clinker2Basicity be 22%, the alkali of blast furnace slag
Spend (CaO/SiO2) it is 1.13.
The data of the iron water amount produced daily according to every cubic metre of blast furnace dischargeable capacity calculate 1 vanadium titanium magnetic of the embodiment of the present invention
Usage factor and fuel ratio in iron ore blast furnace ironmaking process, testing result are 1 vanadium titano-magnetite blast furnace smelting of the embodiment of the present invention
Usage factor during refining is 2.45t/m3.d；Fuel ratio is 560kg/m3.d。
Embodiment 2
Pellet is prepared according to the method for embodiment 1.
By it is above-mentioned be prepared pellet, common lump ore and steel slag be in mass ratio 75:15:10 ingredient be added blast furnace into
Row is smelted, the specific process parameter in smelting process are as follows: wind-warm syndrome is 1230 DEG C, oxygen enrichment percentage 7%, controls molten iron in smelting process
The mass content that the mass content of middle Ti is 0.1%, V is 0.3%, TiO in clinker2Basicity be 22.5%, the alkali of blast furnace slag
Spend (CaO/SiO2) it is 1.13.
According to the method for embodiment 1, the detection embodiment of the present invention 2 carries out the utilization in vanadium titano-magnetite blast furnace ironmaking process
Coefficient is 2.48t/m3.d, fuel ratio 555/kg/m3.d。
Embodiment 3
Pellet is prepared according to the method for embodiment 1.
By it is above-mentioned be prepared pellet, common lump ore and steel slag be in mass ratio 80:8:12 ingredient be added blast furnace into
Row is smelted, the specific process parameter in smelting process are as follows: wind-warm syndrome is 1240 DEG C, oxygen enrichment percentage 8%, controls molten iron in smelting process
The mass content that the mass content of middle Ti is 0.2%, V is 0.4%, TiO in clinker2Basicity be 22.8%, the alkali of blast furnace slag
Spend (CaO/SiO2) it is 1.13.
According to the method for embodiment 1, the detection embodiment of the present invention 3 carries out the utilization in vanadium titano-magnetite blast furnace ironmaking process
Coefficient is 2.50t/m3.d, fuel ratio 552/kg/m3.d。
As can be seen from the above embodiments, as the proportion of vanadium-titanium pellet in furnace charge improves, the proportion of common mine is reduced
And the proportion of steel slag improves, the increase of wind-warm syndrome, the raising of oxygen enrichment percentage realizes the reinforcing of blast furnace process, and usage factor increases,
Fuel ratio reduces, and technical indicator has reached improvement.
As seen from the above embodiment, the present invention provides a kind of blast furnace process sides of the vanadium titano-magnetite of high proportion pellet ore
Method, which is characterized in that the furnace charge in the blast furnace ironmaking process includes: pellet, common lump ore and steel slag.The present invention is for height
The vanadium titano-magnetite blast furnace process of ratio pellet cancels sinter used in blast furnace ironmaking process, then with addition of 5~15%
Common lump ore and steel slag, realize the intensification of smelting process in BF of vanadium titano-magnetite, while also providing a kind of recycling side of steel slag
The blast furnace smelting method production cost of method, the vanadium titano-magnetite of high proportion pellet ore provided by the invention is low, good in economic efficiency.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of blast furnace smelting method of the vanadium titano-magnetite of high proportion pellet ore, which is characterized in that the blast furnace ironmaking process
In furnace charge include:
Pellet, common lump ore and steel slag.
2. the method according to claim 1, wherein the pellet the preparation method comprises the following steps:
Sefstromite concentrate, binder and flux are mixed, mixture is obtained；
Pelletizing after the mixture and water are mixed, obtains pelletizing；
The pelletizing is dried, preheated and roasted, pellet is obtained.
3. according to the method described in claim 2, it is characterized in that, the binder is bentonite；
The flux is quick lime；
The mass ratio of the v-ti magnetite concentrate, binder and flux is (80~90): (1.5~3.0): (5~10).
4. according to the method described in claim 2, it is characterized in that, the granularity of the pelletizing is 10~16mm；
The mass content of moisture is 8.0~9.5% in the pelletizing；
Falling strength >=6 time of the pelletizing；
Compression strength >=1.5kg of the pelletizing.
5. according to the method described in claim 2, it is characterized in that, the temperature of the drying is 500~600 DEG C；
The temperature of the preheating is 800~1000 DEG C；
The temperature of the roasting is 1200~1250 DEG C.
6. the method according to claim 1, wherein the common lump ore includes:
7. the method according to claim 1, wherein the steel slag includes:
8. the method according to claim 1, wherein the mass ratio of the pellet, common lump ore and steel slag is
(70~85): (5~25): (5~15).
9. the method according to claim 1, wherein the wind-warm syndrome in the blast furnace ironmaking process is 1200~1250
℃。
10. the method according to claim 1, wherein the oxygen enrichment percentage in the blast furnace ironmaking process is 2~8%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226558A (en) * | 2020-10-12 | 2021-01-15 | 王玉平 | Blast furnace iron-smelting method using high-proportion alkaline pellets and pellet distributing machine |
| CN112553459A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | High-grade vanadium-titanium pellet and preparation method thereof |
| CN112553388A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace charge of high-grade vanadium titano-magnetite and smelting method |
| CN114134319A (en) * | 2021-10-15 | 2022-03-04 | 四川德胜集团钒钛有限公司 | Caustic lime alkaline pellet and preparation process thereof |
| CN114686627A (en) * | 2022-04-08 | 2022-07-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium titano-magnetite blast furnace ironmaking burden and smelting method thereof |
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| CN112226558A (en) * | 2020-10-12 | 2021-01-15 | 王玉平 | Blast furnace iron-smelting method using high-proportion alkaline pellets and pellet distributing machine |
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| CN112553388A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace charge of high-grade vanadium titano-magnetite and smelting method |
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