CN108950115A - A kind of blast furnace smelting method of vanadium titano-magnetite - Google Patents

A kind of blast furnace smelting method of vanadium titano-magnetite Download PDF

Info

Publication number
CN108950115A
CN108950115A CN201811098874.XA CN201811098874A CN108950115A CN 108950115 A CN108950115 A CN 108950115A CN 201811098874 A CN201811098874 A CN 201811098874A CN 108950115 A CN108950115 A CN 108950115A
Authority
CN
China
Prior art keywords
blast furnace
magnetite
vanadium
present
steel slag
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.)
Pending
Application number
CN201811098874.XA
Other languages
Chinese (zh)
Inventor
付卫国
郑魁
蒋胜
文永才
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Original Assignee
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd filed Critical Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority to CN201811098874.XA priority Critical patent/CN108950115A/en
Publication of CN108950115A publication Critical patent/CN108950115A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/001Injecting additional fuel or reducing agents
    • C21B5/003Injection of pulverulent coal
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/001Injecting additional fuel or reducing agents
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/008Composition or distribution of the charge
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/02Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/02Roasting processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/242Binding; Briquetting ; Granulating with binders
    • C22B1/243Binding; Briquetting ; Granulating with binders inorganic
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00Obtaining refractory metals
    • C22B34/20Obtaining niobium, tantalum or vanadium
    • C22B34/22Obtaining vanadium

Abstract

The present invention provides a kind of blast furnace smelting methods of vanadium titano-magnetite, which is characterized in that furnace charge used in the blast furnace ironmaking process of the vanadium iron magnetite includes: sinter, pellet and steel slag.The present invention proposes a kind of method of vanadium titano-magnetite blast furnace process for the utilization of high calcium steel slag, by vanadium-titanium magnitite sinter, vanadium-titanium pellet and steel slag, the intensification of smelting process in BF of vanadium titano-magnetite is realized by high wind-warm syndrome, high oxygen enrichment percentage, while recycling the iron in steel slag and vanadium.The present invention by blast furnace ironmaking process with addition of pellet, sinter and steel slag, and by high wind-warm syndrome, the measure of big oxygen enrichment percentage, in clinker TiO2Content is up under conditions of 22~24%, realizes the strengthening smelting of vanadium titano-magnetite.

Description

A kind of blast furnace smelting method of vanadium titano-magnetite
Technical field
The invention belongs to ironmaking technology field more particularly to a kind of blast furnace smelting methods of vanadium titano-magnetite.
Background technique
The common main method of v-bearing titanomagnetite smelting is that sefstromite concentrate and common miberal powder are sintered and produce sintering Mine, sefstromite concentrate cause to produce oxide pellet with bentonite, then sinter, pellet and a small amount of lump ore are pressed centainly Ratio is added in blast furnace together with coke, and blowing air down combustion of coke generates reducing gas, and reducing gas rises and furnace charge Decline restores ore, and then fusing drops onto cupola well and completes ironmaking smelting process, realizes the separation of slag, iron.
Panxi Diqu has v-ti magnetite ore resources abundant, wherein TiO2Content be up to 10~13%, climb steel vanadium titanium magnetic The smelting furnace material of iron ore is generally sinter, pellet and lump ore, but conventional bar ore resources are more nervous always, and lump ore exists Effect in schreyerite smelting process obviously weakens.
The use of lump ore in vanadium titano-magnetite blast furnace ironmaking process how is avoided to become those skilled in the art urgently to be resolved The problem of.
Summary of the invention
In view of this, the present invention provides the purpose of the present invention is to provide a kind of blast furnace smelting method of vanadium titano-magnetite Method the use of lump ore is avoided as furnace charge using steel slag in smelting process, while can also recycle in steel slag Iron and vanadium.
The present invention provides a kind of blast furnace smelting methods of vanadium titano-magnetite, which is characterized in that the vanadium iron magnetite Furnace charge used in blast furnace ironmaking process includes:
Sinter, pellet and steel slag.
In the present invention, the raw material for preparing of the sinter preferably includes:
V-ti magnetite concentrate, common iron ore concentrate, flux and fuel.
In the present invention, the v-ti magnetite concentrate is preferably high-Ti type V-Ti magnetite concentrate.In the present invention, the vanadium The ingredient of titanium magnet ore concentrate preferably includes: TFe (full iron) and TiO2.In the present invention, the TFe is in vanadium iron magnetite concentrate Mass content is preferably 52~56%, and more preferably 53~55%, most preferably 54%;TiO2Matter in v-ti magnetite concentrate Measuring content is preferably 10~13%, and more preferably 11~12%.The present invention does not have the type of the vanadium iron magnetite concentrate and source There is special limitation, using v-ti magnetite concentrate well known to those skilled in the art, can be bought and be obtained by market.
In the present invention, vanadium and titanium elements are free of in the common iron ore concentrate.The present invention is to the common iron ore concentrate Type and source there is no special limitation, using common iron ore concentrate well known to those skilled in the art, can be purchased by market Buy acquisition.
In the present invention, the flux preferably includes active lime and quick lime.In the present invention, the active lime and The mass ratio of quick lime is preferably (4~8): (2~6), more preferably (5~7): (3~5), most preferably 6:4.
In the present invention, the fuel preferably includes coke powder and coal dust.In the present invention, the quality of the coke powder and coal dust Than preferably (3~4): (2~3), more preferably (4~5): (1~2), most preferably (5~6): (0~1).The present invention is preferred Using aforementioned proportion coke powder and coal dust be used cooperatively be used as fuel, the present invention by using this special ratios coke powder and coal Powder can make furnace charge have good usage factor and fuel ratio.
In the present invention, the v-ti magnetite concentrate, common iron ore concentrate, flux and quality of fuel than be preferably (45~ 60): (20~35): (6~14): (4~7), more preferably (50~55): (25~30): (8~12): (5~6), most preferably (52~53): (27~28): (10~11): (5.4~5.6).
In the present invention, the ingredient of the sinter preferably includes: TFe (full iron), SiO2、CaO、MgO、Al2O3、V2O5With TiO2
In the present invention, mass content of the TFe in sinter is preferably 48~52%, more preferably 49~ 51%;SiO2Mass content in sinter is preferably 4~6%, and more preferably 4.5~5.5%;CaO is in sinter Mass content is preferably 8~12%, and more preferably 9~11%;Mass content of the MgO in sinter is preferably 2~3%, more Preferably 2.4~2.6%;Al2O3Mass content in sinter is preferably 2~4%, and more preferably 2.5~3.5%;V2O5 Mass content in sinter is preferably 0.3~0.5%, and more preferably 0.35~0.45%;TiO2Matter in sinter Measuring content is preferably 6~8%, and more preferably 6.5~7.5%.Present invention preferably employs the sinter of above-mentioned special composition, this hairs It is bright to be used cooperatively using this Sinter Component and pellet, steel slag and be used as furnace charge that obtain preferable usage factor and fuel Than.
In the present invention, the basicity of the sinter is preferably 1.8~2.2, and more preferably 1.9~2.1, most preferably 2. The present invention preferably controls the basicity of sinter within the above range, is used cooperatively using this sinter basicity and pellet steel slag It can make to obtain preferable usage factor and fuel ratio in blast furnace ironmaking process.
In the present invention, the preparation method of the sinter is preferred are as follows:
It is sintered after v-ti magnetite concentrate, common iron ore concentrate, flux and fuel are mixed, obtains sinter.
The present invention does not have special limitation to the method for the mixing and sintering, using system well known to those skilled in the art The technical solution of standby vanadium-titanium magnitite sinter is mixed and is sintered.
In the present invention, the raw material for preparing of the pellet preferably includes:
V-ti magnetite concentrate and binder.
The present invention does not have special limitation to the type of the v-ti magnetite concentrate and source, using those skilled in the art Well known vanadium titano-magnetite concentrate can be bought by market and be obtained.In the present invention, the v-ti magnetite concentrate preferably with it is upper State that vanadium iron magnetite concentrate described in technical solution is consistent, and details are not described herein.
In the present invention, the binder is preferably bentonite.
In the present invention, the mass ratio of the vanadium iron magnetite concentrate and binder is preferably (97~99):
(1~3), more preferably (97.5~98.5): (1.5~2.5), most preferably 98:2.
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 52~55%, more preferably 53~ 54%;SiO2Mass content in pellet is preferably 3~6%, and more preferably 4~5%;Quality of the CaO in pellet Content is preferably 0.5~2%, and more preferably 1~2%;Mass content of the MgO in pellet is preferably 2~4%, more preferably It is 2.5~3.5%;Al2O3Mass content in pellet is preferably 2~4%, and more preferably 2.5~3.5%;V2O5In ball Mass content in nodulizing is preferably 0.5~0.7%, and more preferably 0.6%;TiO2Mass content in pellet is preferably 10~13%, more preferably 11~12%.Present invention preferably employs the pellets of above-mentioned special composition to be used for and sinter and steel Slag is used cooperatively, and can make to obtain preferable usage factor and fuel ratio in blast furnace ironmaking process.
In the present invention, the compression strength of the pellet is preferably 2000~3000N/, more preferably 2200~ 2800N/, most preferably 2400~2600N/.
In the present invention, the basicity of the pellet is preferably natural alkalinity, and the natural alkalinity refers to pellet The basicity that any basic solvent is formed is not added when production.Present invention preferably employs the pellet of above-mentioned natural alkalinity and sinters With steel slag with the use of blast furnace process is carried out, the pellet of this natural alkalinity can make to obtain in blast furnace ironmaking process good Usage factor and fuel ratio.
In the present invention, the preparation method of the pellet is preferred are as follows:
Pelletizing after v-ti magnetite concentrate and binder are mixed, obtains green-ball;
The green-ball is dried, preheated and roasted, pellet is obtained.
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 green-ball, and more preferably 8.5~9%, Most preferably 8.6~8.8%.
In the present invention, the green-ball drop strength preferably >=6 times.In the present invention, the compression strength of the green-ball 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, and more preferably 850~950 DEG C, most preferably It is 880~920 DEG C.
In the present invention, the temperature of the roasting is preferably 1200~1250 DEG C, more preferably 1210~1240 DEG C, optimal It is selected as 1220~1230 DEG C.
In the present invention, the ingredient of the steel slag preferably includes: TFe, SiO2、CaO、MgO、Al2O3、V2O5And TiO2
In the present invention, mass content of the TFe in steel slag is preferably 20~30%, and more preferably 22~28%, Most preferably 24~26%;SiO2Mass content in steel slag is preferably 10~12%, and more preferably 10.5~11.5%; Mass content of the CaO in steel slag is preferably 35~50%, and more preferably 40~45%;Mass content of the MgO in steel slag is excellent It is selected as 5~15%, more preferably 8~12%, most preferably 10%;Al2O3Mass content in steel slag is preferably 3~6%, More preferably 4~5%;V2O5Mass content in steel slag is preferably 0.8~3%, and more preferably 1.5~2.5%, most preferably It is 2%;TiO2Mass content in steel slag is preferably 1~2%, and more preferably 1.4~1.6%.Present invention preferably employs upper The steel slag and sinter and pellet for stating ingredient are used cooperatively, the steel slag of above-mentioned special composition energy in blast furnace ironmaking process Enough obtain good usage factor and fuel ratio.
In the present invention, the granularity of the steel slag is preferably 20~60mm, more preferably 30~50mm, most preferably 35~ 45mm.Present invention preferably employs the steel slag of above-mentioned granularity, the steel slag and sinter and pellet of above-mentioned granularity are used cooperatively conduct Furnace charge can make have good usage factor and fuel ratio in blast furnace ironmaking process.The steel that the present invention preferably generates steel-making Slag obtains the steel slag of above-mentioned granularity by broken and screening.In the present invention, the steel slag is preferably the liquid steel made steel and generated Slag obtains after cooling.
In the present invention, the mass ratio of the sinter, pellet and steel slag is preferably (60~75): (20~30): (5 ~10), more preferably (65~70): (22~28): (6~9), most preferably (67~68): (24~26): (7~8).This hair Bright key is the usage ratio of reasonable disposition sinter, pellet and steel slag, and the present invention is under the conditions of above-mentioned usage ratio And combine wind-warm syndrome condition in subsequent blast furnace ironmaking process, excess oxygen, in molten iron titanium and silicon control condition, in various techniques Under the comprehensive function of parameter, realizes and carry out vanadium titano-magnetite blast furnace process using Steel-slag for lump ore, tool when making blast furnace process There are good usage factor and fuel ratio.
In the present invention, v-ti magnetite concentrate mass content total in furnace charge is preferably 55~80%, more preferably It is 60~75%, most preferably 65~70%.
In the present invention, the wind-warm syndrome in the vanadium titano-magnetite blast furnace ironmaking process is preferably 1200~1250 DEG C, more excellent It is selected as 1210~1240 DEG C, most preferably 1220~1230 DEG C.The present invention is carrying out vanadium titano-magnetite blast furnace process using steel slag Shi Youxuan uses above-mentioned wind-warm syndrome, keeps the usage factor of blast furnace process and fuel relatively good.
In the present invention, the oxygen enrichment percentage in the vanadium iron magnetite blast furnace ironmaking process is preferably 2~5%, and more preferably 3 ~4%, most preferably 3.5%.The present invention preferably uses above-mentioned oxygen-enriched when carrying out vanadium titano-magnetite blast furnace process using steel slag Rate keeps the usage factor of blast furnace process and fuel relatively good.
In the present invention, in the vanadium iron magnetite blast furnace ironmaking process molten iron mass content of Ti be preferably 0.1~ 0.3%, more preferably 0.15~0.25%, most preferably 0.2%.The present invention is carrying out the smelting of vanadium titano-magnetite blast furnace using steel slag Preferably the Ti content in molten iron is controlled within the above range when refining, keeps the usage factor of blast furnace process and fuel relatively good.
In the present invention, in the vanadium titano-magnetite blast furnace ironmaking process molten iron mass content of Si be preferably 0.1~ 0.3%, more preferably 0.15~0.25%, most preferably 0.2%.The present invention is carrying out the smelting of vanadium titano-magnetite blast furnace using steel slag Preferably the Si content in molten iron is controlled within the above range when refining, keeps the usage factor of blast furnace process and fuel relatively good.
In the present invention, TiO in the vanadium titano-magnetite blast furnace ironmaking process clinker2Mass content be preferably 20~ 24%, more preferably 21~23%, most preferably 22%.The present invention is excellent when carrying out vanadium titano-magnetite blast furnace process using steel slag It selects TiO in clinker2Content controls within the above range, keeps the usage factor of blast furnace process and fuel relatively good.
In the present invention, the basicity (CaO/SiO in blast furnace slag of the vanadium iron magnetite blast furnace ironmaking process clinker2) preferably It is 1.10~1.15, more preferably 1.11~1.14, most preferably 1.12~1.13.The present invention is carrying out vanadium titanium magnetic using steel slag Preferably basicity of slag is controlled within the above range when iron ore blast furnace process, compares the usage factor of blast furnace process and fuel It is good.
The present invention proposes a kind of method of vanadium titano-magnetite blast furnace process for the utilization of high calcium steel slag, and vanadium titanium is sintered Mine, vanadium-titanium pellet and steel slag carry out above-mentioned rational proportion, and realize vanadium titano-magnetite by high wind-warm syndrome, high oxygen enrichment percentage simultaneously Intensification of smelting process in BF, while recycling the iron in steel slag and vanadium.
The present invention with addition of pellet, sinter and steel slag in blast furnace ironmaking process according to above-mentioned usage ratio by carrying out The rational proportion of each ingredient, and by high wind-warm syndrome, the measure of big oxygen enrichment percentage, in clinker TiO2Content is up to 22~24% condition Under, realize the strengthening smelting of vanadium titano-magnetite.
Panxi Diqu has v-ti magnetite ore resources abundant, wherein TiO2Content be up to 10~13%, climb steel vanadium titanium magnetic The smelting furnace material of iron ore is generally sinter, pellet and lump ore, but conventional bar ore resources are unanimously more nervous, and lump ore exists Effect in schreyerite smelting process obviously weakens.In order to avoid the use of lump ore, method provided by the invention is to cancel lump ore, The steel slag that steel-making generates is added, realizes that well done material is smelted.Method provided by the invention can recycle iron and vanadium resource in steel slag, Steel slag is recycled, influence of the steel slag to environment is reduced.
The present invention provides a kind of blast furnace smelting method of vanadium titano-magnetite, it is related to a kind of sinter, pellet, steel slag Preparation and vanadium titano-magnetite smelting process, the present invention solve steel-making generate high CaO steel slag recoverying and utilizing method. The blast furnace smelting method of vanadium iron magnetite provided by the invention, the furnace charge used is by vanadium iron pellet, vanadium iron sinter and steel slag Composition, vanadium-titanium pellet are roasted to obtain by sefstromite concentrate and binder, and the raw material for preparing of vanadium-titanium magnitite sinter includes vanadium titanium Iron ore concentrate and common ore, common ore are the iron ore without vanadium and titanium elements.The present invention passes through in blast furnace process In the process the steel slag in furnace charge with addition of 5~10% and rationally control sinter, pellet and steel slag usage ratio simultaneously The ingredient and parameter of materials of each raw material of reasonable disposition, and at 1200~1250 DEG C of wind-warm syndrome, oxygen enrichment percentage is 2~5%, in clinker TiO2For content under conditions of 22~24%, the mass content of Si is 0.1~0.3% in the molten iron that control smelting process generates, The mass content of Ti is 0.1~0.3%, the steel slag of steel-making is applied in the blast furnace process of vanadium titano-magnetite, above-mentioned various Under the comprehensive function of process conditions, keeps usage factor in blast furnace ironmaking process and fuel relatively good, recycled the iron in steel slag And vanadium resource, reduce pollution of the steel slag to environment.
Method provided by the invention can effectively strengthen the blast furnace process of vanadium titano-magnetite, reduce the production cost of smelting, tool There is 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.
The ingredient of sinter used in following embodiment of the present invention includes: TFe 50.20wt%, FeO 7.84wt%, SiO25.92wt%, CaO 10.85wt%, Al2O32.52wt%, MgO 2.73wt%, TiO26.51wt%, V2O5 0.37wt%;Basicity is 1.83.
The ingredient of steel slag used includes: TFe 20.7wt%, FeO 19.75wt%, SiO210.62wt%, CaO 37.94wt%, Al2O34.17wt%, MgO 12.36wt%, TiO20.41wt%, V2O50.85wt%.
Embodiment 1
It will be mixed after the bentonite ingredient of the sefstromite concentrate of 98wt% and 2wt%, obtain mixture;
The mixture is subjected to pelletizing, obtains green pellets;Granularity is the green-ball of 10~16mm granularity in the green pellets Group accounts for the ratio > 90% of total green pellets quantity;The moisture content of the green pellets is controlled 8.5%;
By the green pellets in 550 DEG C of dryings, 900 DEG C of preheatings, 1230 DEG C are roasted, and obtain pellet.
The ingredient for the pellet that the embodiment of the present invention 1 is prepared includes: TFe 54.55wt%, FeO 2.45wt%, SiO23.56wt%, CaO 0.85wt%, Al2O33.58wt%, MgO 2.87wt%, TiO210.52wt%, V2O5 0.58wt%.
The basicity of pellet is natural alkalinity, and compression strength is 2400N/.
Embodiment 2
Pellet and steel slag that sinter, embodiment 1 are prepared are mixed according to the ratio that mass ratio is 73:22:5 To furnace charge;
The furnace charge is subjected to blast furnace process, the wind-warm syndrome in blast furnace ironmaking process is 1220 DEG C, oxygen enrichment percentage 2%, molten iron Mass content of the mass content control of middle Ti in 0.2%, Si controls the TiO in 0.2%, clinker2Mass content be 21.5%, the basicity of clinker (CaO/SiO in blast furnace slag2) it is 1.13.
The data of the iron water amount produced daily according to every cubic metre of blast furnace dischargeable capacity calculate the embodiment of the present invention 2 and carry out height Usage factor and fuel ratio in furnace smelting process, testing result are that the embodiment of the present invention 2 carries out the benefit in blast furnace ironmaking process It is 2.50t/m with coefficient3.d, fuel ratio 550kg/m3.d。
Embodiment 3
Pellet and steel slag that sinter, embodiment 1 are prepared are mixed according to the ratio that mass ratio is 67:25:7 To furnace charge;
The furnace charge is subjected to blast furnace process, the wind-warm syndrome in blast furnace ironmaking process is 1230 DEG C, oxygen enrichment percentage 3%, molten iron Mass content of the mass content control of middle Ti in 0.1%, Si controls the TiO in 0.1%, clinker2Mass content be 22.0%, the basicity of clinker (CaO/SiO in blast furnace slag2) it is 1.10.
According to 2 method of embodiment, testing the usage factor that the embodiment of the present invention 3 carries out in blast furnace ironmaking process is 2.55t/ m3.d, fuel ratio 545kg/m3.d。
Embodiment 4
Pellet and steel slag that sinter, embodiment 1 are prepared are mixed according to the ratio that mass ratio is 63:28:9 To furnace charge;
The furnace charge is subjected to blast furnace process, the wind-warm syndrome in blast furnace ironmaking process is 1240 DEG C, oxygen enrichment percentage 4%, molten iron Mass content of the mass content control of middle Ti in 0.3%, Si controls the TiO in 0.3%, clinker2Mass content be 22.5%, the basicity of clinker (CaO/SiO in blast furnace slag2) it is 1.15.
According to 2 method of embodiment, testing the usage factor that the embodiment of the present invention 4 carries out in blast furnace ironmaking process is 2.60t/ m3.d, fuel ratio 542kg/m3.d。
As seen from the above embodiment, as what the decline of sinter ratio, the raising of pellet ratio and steel slag matched mentions Height, the increase of wind-warm syndrome and the raising of oxygen enrichment percentage realize the reinforcing of blast furnace process, and usage factor increases, and fuel ratio reduces, skill Art index has reached improvement.
The present invention provides a kind of blast furnace smelting methods of vanadium titano-magnetite, which is characterized in that the vanadium iron magnetite Furnace charge used in blast furnace ironmaking process includes: sinter, pellet and steel slag.The present invention utilizes proposition for high calcium steel slag Vanadium-titanium magnitite sinter, vanadium-titanium pellet and steel slag are passed through high wind-warm syndrome, Gao Fu by a kind of method of vanadium titano-magnetite blast furnace process Oxygen rate realizes the intensification of smelting process in BF of vanadium titano-magnetite, while recycling the iron in steel slag and vanadium.The present invention passes through in blast furnace process In the process with addition of pellet, sinter and steel slag, and by high wind-warm syndrome, the measure of big oxygen enrichment percentage, in clinker TiO2Content is up to Under conditions of 22~24%, the strengthening smelting of vanadium titano-magnetite is realized.
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 vanadium titano-magnetite, which is characterized in that in the blast furnace ironmaking process of the vanadium iron magnetite The furnace charge used includes:
Sinter, pellet and steel slag.
2. the method according to claim 1, wherein the mass ratio of the sinter, pellet and steel slag is (60 ~75): (20~30): (5~10).
3. the method according to claim 1, wherein the wind-warm syndrome in the blast furnace ironmaking process of the vanadium titano-magnetite It is 1200~1250 DEG C.
4. the method according to claim 1, wherein oxygen-enriched in the blast furnace ironmaking process of the vanadium titano-magnetite Rate is 2~5%.
5. the method according to claim 1, wherein Ti in the blast furnace ironmaking process molten iron of the vanadium titano-magnetite Mass content be 0.1~0.3%, the mass content of Si is 0.1~0.3% in molten iron.
6. the method according to claim 1, wherein in the blast furnace ironmaking process clinker of the vanadium titano-magnetite TiO2Quality contain be 20~24%;The basicity of clinker is 1.10~1.15.
7. the method according to claim 1, wherein the basicity of the sinter is 1.8~2.2.
8. the method according to claim 1, wherein the compression strength of the pellet is 2000~3000N/ It is a.
9. the method according to claim 1, wherein the steel slag includes:
The TFe of 20~30wt%;
The SiO of 10~12wt%2
The CaO of 35~50wt%;
The MgO of 5~15wt%;
The Al of 3~6wt%2O3
The V of 0.8~3wt%2O5
The TiO of 1~2wt%2
10. the method according to claim 1, wherein the granularity of the steel slag is 20~60mm.
CN201811098874.XA 2018-09-20 2018-09-20 A kind of blast furnace smelting method of vanadium titano-magnetite Pending CN108950115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811098874.XA CN108950115A (en) 2018-09-20 2018-09-20 A kind of blast furnace smelting method of vanadium titano-magnetite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811098874.XA CN108950115A (en) 2018-09-20 2018-09-20 A kind of blast furnace smelting method of vanadium titano-magnetite

Publications (1)

Publication Number Publication Date
CN108950115A true CN108950115A (en) 2018-12-07

Family

ID=64471713

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811098874.XA Pending CN108950115A (en) 2018-09-20 2018-09-20 A kind of blast furnace smelting method of vanadium titano-magnetite

Country Status (1)

Country Link
CN (1) CN108950115A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110724776A (en) * 2019-10-23 2020-01-24 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method of vanadium titano-magnetite
CN112662826A (en) * 2020-12-30 2021-04-16 黑龙江建龙钢铁有限公司 Novel process for improving recovery rate of blast furnace vanadium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101289697A (en) * 2008-06-02 2008-10-22 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace ironmaking raw material and method for preparing same
CN102732655A (en) * 2011-04-13 2012-10-17 攀钢集团钢铁钒钛股份有限公司 Blast furnace ironmaking method
CN104673951A (en) * 2015-03-20 2015-06-03 攀钢集团西昌钢钒有限公司 Blast furnace smelting method by using vanadium-titanium two-phase sintering ore
CN104762429A (en) * 2015-04-16 2015-07-08 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method
CN104878143A (en) * 2015-06-18 2015-09-02 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method of vanadium titano-magnetite
CN107586903A (en) * 2017-09-29 2018-01-16 四川德胜集团钒钛有限公司 A kind of blast furnace process furnace charge and blast furnace smelting method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101289697A (en) * 2008-06-02 2008-10-22 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace ironmaking raw material and method for preparing same
CN102732655A (en) * 2011-04-13 2012-10-17 攀钢集团钢铁钒钛股份有限公司 Blast furnace ironmaking method
CN104673951A (en) * 2015-03-20 2015-06-03 攀钢集团西昌钢钒有限公司 Blast furnace smelting method by using vanadium-titanium two-phase sintering ore
CN104762429A (en) * 2015-04-16 2015-07-08 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method
CN104878143A (en) * 2015-06-18 2015-09-02 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method of vanadium titano-magnetite
CN107586903A (en) * 2017-09-29 2018-01-16 四川德胜集团钒钛有限公司 A kind of blast furnace process furnace charge and blast furnace smelting method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
倪宝中: "含钒钢渣返回28M3高炉冶炼高钒生铁", 《钢铁钒钛》 *
张燕燕 等: "临钢炼铁厂高炉配用钢渣实践", 《炼铁技术通讯》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110724776A (en) * 2019-10-23 2020-01-24 攀钢集团攀枝花钢铁研究院有限公司 Blast furnace smelting method of vanadium titano-magnetite
CN112662826A (en) * 2020-12-30 2021-04-16 黑龙江建龙钢铁有限公司 Novel process for improving recovery rate of blast furnace vanadium

Similar Documents

Publication Publication Date Title
CN105907948B (en) The method of the low-grade magnetic separation of metallized pellet containing chromic vanadium-titanium ferroferrite separation
CN102181610B (en) Composite slagging agent for making semisteel, and preparation method and using method thereof
CN102242251B (en) Alkaline V-Ti pellet and preparation method thereof
CN101476001B (en) Method for smelting medium titanium slag by blast furnace
WO2019001180A1 (en) Method for preparing sintered ore from high-grade, vanadium rich, chromium-bearing vanadium–titanium magnetite concentrate mixture
CN104862436B (en) A kind of large blast furnace banking distribution
CN101775451A (en) Blast-furnace smelting method for vanadium titano-magnetite
CN103981310B (en) A kind of method of smelting vanadium-titanium magnetite by blast furnace
CN108998606B (en) The blast furnace ferrous burden structure that a kind of pellet and Metallurgical Properties of Sinter are distributed rationally
CN108929927A (en) A kind of blast furnace smelting method of the vanadium titano-magnetite of high proportion pellet ore
CN101665871A (en) Method for producing titanium carbide slag
CN101555532A (en) Oxygen blast furnace iron-making method based on cold-bonded carbonic pellet
CN107151717A (en) A kind of high chromium high-titanium type vanadium-titanium magnetite blast furnace ironmaking furnace charge and its blast furnace smelting method
CN108950115A (en) A kind of blast furnace smelting method of vanadium titano-magnetite
CN108950112A (en) The method of full vanadium titano-magnetite blast furnace ironmaking
CN103667686A (en) Sintering mixture and application thereof
CN101638698B (en) Method for smelting vanadium-titanium magnetite by blast furnace
CN107326175A (en) A kind of method for reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point
CN108950189A (en) A method of sinter containing MgO is produced using waste magnesia carbon bricks
CN104630458A (en) Preparation method of acidic chromium-containing vanadium-titanium sintered ore
CN101240360A (en) Oxide briquetting used for steelmaking alloy element and preparation method thereof
CN107190114B (en) A method of improving high titania type slag fluidity
CN113957240A (en) Preparation method of manganese-containing vanadium-titanium magnetite pellet
CN105463214B (en) A kind of method that high ferronickel is produced using low poor grade lateritic nickel ore
CN110343796B (en) Method for reducing iron loss in blast furnace smelting of vanadium titano-magnetite

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20181207