CN103276126B - Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite - Google Patents
Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite Download PDFInfo
- Publication number
- CN103276126B CN103276126B CN201310219094.7A CN201310219094A CN103276126B CN 103276126 B CN103276126 B CN 103276126B CN 201310219094 A CN201310219094 A CN 201310219094A CN 103276126 B CN103276126 B CN 103276126B
- Authority
- CN
- China
- Prior art keywords
- slag
- titanium
- magnetite
- blast furnace
- vanadium
- 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.)
- Active
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite. The method comprises the following steps: preparing boron iron concentrate into vanadium titanium sintered ore, adding the sintered ore into a blast furnace together with other furnace burdens; injecting solid boric acid and pulverized coal into the furnace, so that the contents of the sintered ore and B2O3 entering the slag in a blowing mode account for 0.8-1.3 weight percent of the total slag amount. According to the method, the quality of the high titanium vanadium titano-magnetite is improved, the liquidity of high titanium slag is effectively improved, and the slag and iron are favorably separated; and moreover, the method is simple in process and favorable for industrial application since the coal burning process, the coal blowing process and equipment do not need to be improved.
Description
Technical field
The invention belongs to metallurgical technology field, relate to blast furnace ironmaking category, particularly relate to a kind of method improving titanium slag mobility in smelting vanadium-titanium magnetite by blast furnace.
Background technology
TiO in slag during smelting vanadium-titanium magnetite by blast furnace
2massfraction reach 20 ~ 25%, in smelting process, there will be slag thickness, slag iron regardless of phenomenons such as, hearth accumulations, compared with the blast-furnace smelting of common ore deposit, there is larger difficulty.Meanwhile, in order to reduce coke consumption, save ironmaking cost, the coal of blast furnace brings up to 130kg/tHM than, and wishes on this basis to carry high-coal ratio further.Under blast furnace big coal injection condition, can produce a large amount of unburned coal powder, a part discharges out of the furnace with blast furnace gas, and another part can be gathered in cupola well.Now, unburned coal powder can with the TiO in slag
2reaction produces a large amount of TiC, TiN and Ti (C, N), and the titanium-containing compound of these new generations has higher fusing point, and titanium slag will certainly be made to become thickness and be unfavorable for slag sluicing system more.Therefore, the viscosity reducing titanium slag under big coal injection condition becomes the task of top priority to improve its mobility.As a kind of low melting component (723K), B
2o
3be a kind of effective flux, the fusing point of the metallurgical cinder such as refining slag, Free-fluorid Mold Powder can be reduced, improve their mobility.
Current domestic blast furnace adds the research of boride, mainly concentrate on and improve vanadium titanium Metallurgical Properties of Sinter and high alumina blast furnace slag mobility aspect, and the boride only adding lower aq could make moderate progress to the metallurgical performance of vanadium titanium agglomerate, the introducing of more boride has disadvantageous effect on the contrary to sinter quality.In addition high alumina slag viscosity increases has essence different with high-titanium blast furnace slag viscosity increase under big coal injection condition, and the method and the add-on that add boride also have larger difference.As the patent No. 201110174629.4 high-Ti type V-Ti magnetite concentrate adds the sintering method of boride, require to introduce B in ferro-boron concentrate mode in vanadium titanium agglomerate
2o
3time, B
2o
3proportion is 0.06-0.23%, and in this ratio range, sinter quality can be greatly improved, but the B of this proportioning
2o
3enter in slag less on the impact of slag viscosity, be not enough to effectively improve its mobility.The patent No. 201110190772.2 1 kinds improves the method for high-aluminum slag fluidity in blast furnace ironmaking process, and it is the ferro-boron concentrate allocating 8-27% in high alumina agglomerate into, although this allocation ratio makes the B of high alumina slag
2o
3content controls the higher level at 0.5-1.5%, effectively improves the mobility of high alumina slag, but so the ferro-boron concentrate of high mixture ratio can have a negative impact to high-Ti type V-Ti sinter quality, unfavorable to blast-furnace smelting high-titanium type vanadium-titanium magnetite.
Summary of the invention
The technical problem to be solved in the present invention, under big coal injection condition, high-titanium type vanadium-titanium magnetite blast furnace smelting slag becomes sticky, is unfavorable for the problem of slag sluicing system, and traditional method fundamentally cannot solve the difficulty that slag thickness brings to blast furnace operating; The object of the present invention is to provide a kind of practical, vanadic-titanomagnetite sintering quality can be ensured, the metallurgical method of slag thickness problem can be improved again.
The present invention adopts following technical scheme for achieving the above object.
Improve a method for titanium slag mobility in smelting vanadium-titanium magnetite by blast furnace, make agglomerate with ferro-boron concentrate and other furnace charges join in blast furnace simultaneously; Solid boric acid and coal dust mix from air port and spray in stove, make agglomerate and injection method enter B in slag
2o
3quality account for the 0.8-1.3% of total slag amount.
Preferred version of the present invention is, by ferro-boron concentrate and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and join outward to return mine and be mixed containing B mutually
2o
3mass percent is the vanadium titanium agglomerate of 0.06-0.23%; And solid boric acid to be mixed from air port in ratio and the coal dust of 9-15kg/tHM spray in stove, make agglomerate and injection method enter B in slag
2o
3quality account for the 0.8-1.3% of total quantity of slag.
Preferred version of the present invention is, the parameter of described ferro-boron concentrate is TFe > 50%, B
2o
32.5-6.5%(mass percent), and with the proportioning of massfraction 2-6% and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and join mixed sintering of returning mine outward.
Preferred version of the present invention is, described agglomerate, with the ratio of mass percent 60-65%, is mixed into stove with the pellet of 30-35%, the lump ore of about 5% and coke from furnace roof.
And due to B in solid boric acid
2o
3content higher (massfraction is 56.45%), the solid boric acid of a small amount of (9-15kg/tHM) and coal dust mixed injection enter cupola well and can not bring difficulty to blast furnace operating.In conjunction with the part B introduced in agglomerate
2o
3, B total in slag
2o
3massfraction is 0.8-1.3%, can effectively reduce the viscosity of high-titanium blast furnace slag under big coal injection condition.The method is on the basis of improving high-Ti type V-Ti Metallurgical Properties of Sinter, improves the practical technology of high-titanium blast furnace slag mobility under big coal injection condition.
Compared with prior art, the present invention has following beneficial effect:
1. ensureing on the basis that high-Ti type V-Ti sinter quality improves, (agglomerate and winding-up material) is by B by different way
2o
3join and smelt in high-titanium type vanadium-titanium magnetite blast furnace, this technique not only improves the quality of high-Ti type V-Ti agglomerate, effectively improves the mobility of high-titanium blast furnace slag simultaneously.The patent No. 201110174629.4 high-Ti type V-Ti magnetite concentrate adds the sintering method of boride, can only improve high titanium sinter quality, effectively can not improve slag fluidity.
2. the method can make full use of the iron resources ironmaking in ferro-boron concentrate, and boron resource improves sinter quality and slag fluidity, has accomplished to achieve many things at one stroke;
3. this boride feed postition is easy, no matter is that sintering adds ferro-boron concentrate, or winding-up adds solid boric acid, does not need to transform sintering process and coal spraying process, Be very effective, is easy to promote.
Embodiment
Embodiment 1:
Embodiments of the invention obtain by carrying out industrial experiment on the sintering plant and blast furnace of certain Steel Plant.By TFe > 50%, B
2o
3content is the ferro-boron concentrate of 3.8wt%, and it to be returned mine etc. with 6wt% and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and joining outward and mixes, and makes B in agglomerate
2o
3content be 0.23wt%, then by this agglomerate with the ratio of 63wt%, be mixed into stove with the pellet of 32wt%, the lump ore of 7wt% and coke from furnace roof; To mix with coal dust with 15kg/tHM from air port and spray into solid boric acid, make agglomerate and injection method enter total B in slag
2o
3quality accounts for 1.3% of total quantity of slag.With do not add compared with boride, sintered ore rotary drum strength improves 1.62%, and low temperature reduction degradation index (-3.15mm) reduces 3.97%, and when 1340 DEG C, titanium slag viscosity reduces 1.34Pa s, when 1400 DEG C, titanium slag viscosity reduces 0.21Pa s, mobility be improved significantly.
Embodiment 2:
Embodiments of the invention obtain by carrying out industrial experiment on the sintering plant and blast furnace of certain Steel Plant.By TFe > 50%, B
2o
3content is the ferro-boron concentrate of 6.5wt%, and it to be returned mine etc. with 2.5wt% and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and joining outward and mixes, and makes B in agglomerate
2o
3content be 0.16wt%, then by this agglomerate with the ratio of 60wt%, be mixed into stove with the pellet of 35wt%, the lump ore of 5wt% and coke from furnace roof; To mix with coal dust with 12.8kg/tHM from air port and spray into solid boric acid, make agglomerate and injection method enter total B in slag
2o
3quality accounts for 1.08% of total quantity of slag.With do not add compared with boride, sintered ore rotary drum strength improve 1.14%, low temperature reduction degradation index (-3.15mm) reduces 3.01%, 1340 DEG C constantly titanium slag viscosity reduce 0.89Pa s, when 1400 DEG C, titanium slag viscosity reduces 0.13Pa s, mobility be improved significantly.
Embodiment 3:
Embodiments of the invention obtain by carrying out industrial experiment on the sintering plant and blast furnace of certain Steel Plant.By TFe > 50%, B
2o
3content is the ferro-boron concentrate of 2.5wt%, and it to be returned mine etc. with 2.4wt% and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and joining outward and mixes, and makes B in agglomerate
2o
3content be 0.06wt%, then by this agglomerate with the ratio of 65wt%, be mixed into stove with the pellet of 30wt%, the lump ore of 3wt% and coke from furnace roof; To mix with coal dust with 9kg/tHM from air port and spray into solid boric acid, make agglomerate and injection method enter total B in slag
2o
3quality accounts for 0.8% of total quantity of slag.With do not add compared with boride, sintered ore rotary drum strength improve 0.64%, low temperature reduction degradation index (-3.15mm) reduces 2.14%, 1340 DEG C constantly titanium slag viscosity reduce 0.58Pa s, when 1400 DEG C, titanium slag viscosity reduces 0.08Pa s, and mobility improves.
Claims (3)
1. one kind is improved the method for titanium slag mobility in smelting vanadium-titanium magnetite by blast furnace, it is characterized in that: make vanadium titanium agglomerate with ferro-boron concentrate and other furnace charges join in blast furnace simultaneously, by ferro-boron concentrate and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and join phase mixed sintering of returning mine outward and become containing B
2o
3for the vanadium titanium agglomerate of 0.06-0.23wt%; Solid boric acid and coal dust mix from air port and spray in stove, and solid boric acid mixes with coal dust in the ratio of 9-15kg/tHM; Agglomerate and injection method is made to enter B in slag
2o
3content accounts for the 0.8-1.3wt% of total slag amount.
2. a kind of method improving titanium slag mobility in smelting vanadium-titanium magnetite by blast furnace according to claim 1, is characterized in that: the parameter of described ferro-boron concentrate is TFe > 50%, B
2o
32.5-6.5wt%, and with the proportioning of massfraction 2-6% and high-Ti type V-Ti magnetite concentrate, common rich ore powder, flux, fuel and join mixed sintering of returning mine outward.
3. a kind of method improving titanium slag mobility in smelting vanadium-titanium magnetite by blast furnace according to claim 1 and 2, it is characterized in that: described vanadium titanium agglomerate, with the ratio of mass percent 60-65%, is mixed into stove with the pellet of 30-35%, the lump ore of 3-7% and coke from furnace roof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219094.7A CN103276126B (en) | 2013-06-05 | 2013-06-05 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219094.7A CN103276126B (en) | 2013-06-05 | 2013-06-05 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103276126A CN103276126A (en) | 2013-09-04 |
| CN103276126B true CN103276126B (en) | 2015-04-08 |
Family
ID=49058741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310219094.7A Active CN103276126B (en) | 2013-06-05 | 2013-06-05 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103276126B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925738A (en) * | 2016-07-13 | 2016-09-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Environmental-friendly modifier for high titania bearing blast furnace slag and modifying method of environmental-friendly modifier |
| CN106834574A (en) * | 2017-02-24 | 2017-06-13 | 本钢板材股份有限公司 | One kind is colded pressing boracic pelletizing blast furnace prepurging solvent and its preparation, application method |
| CN109439820A (en) * | 2018-11-29 | 2019-03-08 | 安徽工业大学 | A kind of blast furnace process raw material and its smelting process |
| CN110453024A (en) * | 2019-09-19 | 2019-11-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Boracic slag system containing manganese for blast furnace process |
| CN113801969B (en) * | 2021-08-19 | 2023-01-17 | 鞍钢股份有限公司 | Ultrahigh TiO (titanium dioxide) 2 Blast furnace smelting method of furnace slag |
| CN113913607A (en) * | 2021-10-13 | 2022-01-11 | 四川德胜集团钒钛有限公司 | Sintering process of high-vanadium titano-magnetite |
| CN114686623A (en) * | 2022-04-08 | 2022-07-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering metallic iron from slag |
| CN115418424A (en) * | 2022-09-29 | 2022-12-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Blowing method for improving performance of high-titanium slag in schreyerite smelting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793386A (en) * | 2006-01-11 | 2006-06-28 | 高同柱 | Blowing catalysing synergist for furnace and production tech. thereof |
| CN102242256A (en) * | 2011-06-27 | 2011-11-16 | 攀钢集团有限公司 | Sintering method for high-titanium type vanadium titanium magnet concentrate with added boride |
| CN102251064A (en) * | 2011-07-08 | 2011-11-23 | 北京科技大学 | Method for improving high-aluminum slag fluidity in blast furnace ironmaking process |
-
2013
- 2013-06-05 CN CN201310219094.7A patent/CN103276126B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793386A (en) * | 2006-01-11 | 2006-06-28 | 高同柱 | Blowing catalysing synergist for furnace and production tech. thereof |
| CN102242256A (en) * | 2011-06-27 | 2011-11-16 | 攀钢集团有限公司 | Sintering method for high-titanium type vanadium titanium magnet concentrate with added boride |
| CN102251064A (en) * | 2011-07-08 | 2011-11-23 | 北京科技大学 | Method for improving high-aluminum slag fluidity in blast furnace ironmaking process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103276126A (en) | 2013-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103276126B (en) | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite | |
| CN101260444B (en) | Blast furnace iron-smelting method | |
| CN103820590B (en) | The blast-furnace smelting method for vanadium titano-magnetite of a kind of ore-coke mixed charging | |
| CN101775451B (en) | Blast-furnace smelting method for vanadium titano-magnetite | |
| CN102242256B (en) | Sintering method for high-titanium type vanadium titanium magnet concentrate with added boride | |
| CN104119939B (en) | A kind of ironmaking hot pressing iron coke and preparation method thereof | |
| CN102978312B (en) | Blast furnace smelting process used for high-vanadium-titanium low-MgO furnace slag | |
| CN103981310B (en) | A kind of method of smelting vanadium-titanium magnetite by blast furnace | |
| CN101824503B (en) | Method for producing vanadiferous pigiron by adopting vanadiferous converter steel slag | |
| CN104278146B (en) | A kind of sintering flux preparation method for iron ore sintering | |
| CN104762429A (en) | Blast furnace smelting method | |
| CN106048114A (en) | Method for blast furnace to use hot-press ferrous coke to perform low-carbon ironmaking | |
| CN104372127A (en) | Method for improving furnace protection efficiency of blast furnace | |
| CN106191351A (en) | A kind of method of blast furnace ironmaking | |
| CN104278118A (en) | Method of using waste magnesia carbon bricks in blast furnace iron making to improve performances of blast-furnace slag | |
| CN101831541A (en) | Method for comprehensively utilizing molten slag and carbonitriding slag | |
| CN104419793B (en) | Vanadium-titanium-iron coke for protecting blast furnace and preparation and use methods thereof | |
| CN103131851A (en) | Magnesium-rich bentonite binder for pellets | |
| CN102839281A (en) | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction | |
| CN107586902B (en) | It is a kind of can effective reuse iron content waste resource blast furnace iron-making process | |
| CN101613616B (en) | Coke for furnace protection and preparation method thereof | |
| CN103695632B (en) | Method for adjusting slagging alkalinity of melting reduction modification furnace by using iron ore tailings | |
| CN110643760B (en) | Ultrahigh Al2O3Blast furnace smelting method of furnace slag | |
| CN101967530B (en) | Method for reducing iron by smelting reduction in electrometallurgy | |
| CN104988258B (en) | Mixed sintering ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |