CN107151717A - A kind of high chromium high-titanium type vanadium-titanium magnetite blast furnace ironmaking furnace charge and its blast furnace smelting method - Google Patents
A kind of high chromium high-titanium type vanadium-titanium magnetite blast furnace ironmaking furnace charge and its blast furnace smelting method Download PDFInfo
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- CN107151717A CN107151717A CN201710423180.8A CN201710423180A CN107151717A CN 107151717 A CN107151717 A CN 107151717A CN 201710423180 A CN201710423180 A CN 201710423180A CN 107151717 A CN107151717 A CN 107151717A
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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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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
Abstract
The invention provides a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge and its smelting process, the furnace charge is in terms of parts by weight, including following components：The common lump ore of 65~75 parts high chromium high-Ti type V-Ti sintering deposit, 25~30 parts high Cr-V-Ti pellet and 2~5 parts of 10~50mm of granularity；High Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high-Ti type V-Ti magnetite concentrate, common iron ore, fuel and flux sintering is made；Cr in high chromium high-Ti type V-Ti magnetite concentrate2O3Mass content be 1.0~1.9%, TiO2Mass content be 12~13%；High Cr-V-Ti pellet is 97~99 by mass ratio:1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and bentonite is made；TFe mass contents are 40~50% and SiO in common lump ore2Mass content is 15~25%.The furnace charge energy intensification of smelting process in BF, and the capacity factor of a blast furnace is higher.
Description
Technical field
The present invention relates to ironmaking technology field, more particularly to a kind of high chromium high-titanium type vanadium-titanium magnetite blast furnace ironmaking furnace charge and
Its blast furnace smelting method.
Background technology
China is a developing power, with developing rapidly for socialist market economy, to the quality of iron ore
And require more and more stricter.For actual production, cost-effective is always one of important goal of enterprise, and due to common ore deposit
Price is far above vanadium titano-magnetite, therefore, more vanadium titano-magnetite is utilized in actual production, to cost-effective with important
Meaning.And high chromium high-titanium type vanadium-titanium magnetite in addition to ferrovanadium titanium also with precious chromium resource, conjugation steel and coloured two big
Industry, with higher comprehensive utilization value.
The production procedure of common sefstromite comprehensive utilization has been basically formed, but according to the flow, its iron, vanadium, titanium
Utilization ratio is relatively low, particularly the utilization rate foundation of titanium resource, and the utilization rate for climbing western titanium resource is 25%, and the titanium of Chengde area is provided
Source utilization rate is also less than 10%.Therefore, existing process flow is actively improved, brand-new technique and equipment is developed, is efficiently using general
The inevitable choice of logical vanadium titano-magnetite.
On the one hand high chromium high-titanium type vanadium-titanium magnetite disclosure satisfy that demand of the blast fumance to iron ore material, the opposing party
Face, because high chromium high-titanium type vanadium-titanium magnetite is higher containing chromium, can develop the chromium product of high added value, so as to be cultivated for enterprise development
The new source of economic growth.Although the high chromium high-titanium type vanadium-titanium magnetite resource of China has begun to exploit utilization on a small scale, but because of it
System integration technology is not yet formed, and vanadium chromium resource therein, especially chromium resource are not utilized still, and this not only directly results in Gao Ge
High-titanium type vanadium-titanium magnetite comprehensive utilization value can not be played effectively, and waste of resource is polluted to environment.
In view of, the particularity of high chromium high-titanium type vanadium-titanium magnetite resource at home and abroad there is no be applied to blast furnace at present
The technique of production, related research is very not enough.
The content of the invention
In view of this, it is an object of the invention to provide a kind of high chromium high-titanium type vanadium-titanium magnetite blast furnace ironmaking furnace charge and its
Blast furnace smelting method, the furnace charge can intensification of smelting process in BF, and the capacity factor of a blast furnace is higher.
The invention provides a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge, in terms of parts by weight, including following components：
65~75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~30 parts of high Cr-V-Ti pellet and 2~5 parts of granularity
For 10~50mm common lump ore；
The high Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high-Ti type V-Ti
Magnetite concentrate, common iron ore, fuel and flux sintering are made；Cr in the high chromium high-Ti type V-Ti magnetite concentrate2O3Quality contain
Measure as 1.0~1.9%, TiO2Mass content be 12~13%；
The high Cr-V-Ti pellet is 97~99 by mass ratio:1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and swelling
Ball is made with local methods to be made；
TFe mass contents are 40~50% and SiO in the common lump ore2Mass content is 15~25%.
Preferably, the basicity of the high chromium high-Ti type V-Ti sintering deposit is preferably 2.2~2.5.
Preferably, the fuel is preferably selected from coke powder；The flux is preferably selected from quick lime and/or lime stone.
Preferably, the vanadium titano-magnetite blast furnace ironmaking furnace charge preferably includes 71~75 parts of high chromium high-Ti type V-Ti sintering
The granularity of ore deposit, 25~26 parts of high Cr-V-Ti pellet and 2~3 parts by weight is 10~50mm common lump ore.
The invention provides a kind of blast furnace process side of the vanadium titano-magnetite blast furnace ironmaking furnace charge described in above-mentioned technical proposal
Method, comprises the following steps：
High chromium high-Ti type V-Ti sintering deposit, high Cr-V-Ti pellet and granularity are being blown for 10~50mm common lump ore
Smelted under conditions of the low high silica flour of iron and coal dust；
TFe mass contents are 20~40% and SiO in the high silica flour of low iron2Mass content is 25~45%.
Preferably, the injection quality of the high silica flour of low iron accounts for the 2~10% of coal dust.
Preferably, the wind-warm syndrome of the smelting is 1200~1250 DEG C；The oxygen enrichment percentage of smelting is 2~5%；In the clinker of smelting
TiO2Mass content be 22~23%.
Preferably, the injection amount of the coal dust is 130~160kg/tFe.
The invention provides a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge, in terms of parts by weight, including following components：65~
75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~30 parts of high Cr-V-Ti pellet and 2~5 parts of granularity is 10~50mm's
Common lump ore；The high Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high-titanium type vanadium
Titanium magnet ore concentrate, common iron ore, fuel and flux sintering are made；Cr in the high chromium high-Ti type V-Ti magnetite concentrate2O3Quality
Content is 1.0~1.9%, TiO2Mass content be 12~13%；The high Cr-V-Ti pellet is 97~99 by mass ratio:
1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and bentonite pelletizing is made；In the common lump ore TFe mass contents be 40~
50% and SiO2Mass content is 15~25%.The furnace charge can intensification of smelting process in BF, and the capacity factor of a blast furnace is higher.Experiment knot
Fruit shows：The capacity factor of a blast furnace is 2.50~2.58t/m3.d。
Embodiment
The invention provides a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge, in terms of parts by weight, including following components：
65~75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~30 parts of high Cr-V-Ti pellet and 2~5 parts of granularity
For 10~50mm common lump ore；
The high Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high-Ti type V-Ti
Magnetite concentrate, common iron ore, fuel and flux sintering are made；Cr in the high chromium high-Ti type V-Ti magnetite concentrate2O3Quality contain
Measure as 1.0~1.9%, TiO2Mass content be 12~13%；
The high Cr-V-Ti pellet is 97~99 by mass ratio:1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and swelling
Ball is made with local methods to be made；
TFe mass contents are 40~50% and SiO in the common lump ore2Mass content is 15~25%.
The vanadium titano-magnetite blast furnace ironmaking furnace charge that the present invention is provided includes 65~75 parts of high chromium high-Ti type V-Ti sintering deposit,
More preferably 71~75 parts；In a particular embodiment of the present invention, the consumption of the high chromium high-Ti type V-Ti sintering deposit be 67,
69th, 71 or 73 parts.The high Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high titania type
V-ti magnetite concentrate, common iron ore, fuel and flux sintering are made；Cr in the high chromium high-Ti type V-Ti magnetite concentrate2O3Matter
Amount content is 1.0~1.9%, TiO2Mass content be 12~13%.V element and titanium elements are free of in the common iron ore.
In the present invention, the fuel is preferably selected from coke powder；The flux is preferably selected from quick lime and/or lime stone.
In the present invention, the basicity of the high chromium high-Ti type V-Ti sintering deposit is preferably 2.2~2.5.
The vanadium titano-magnetite blast furnace ironmaking furnace charge that the present invention is provided includes 25~30 parts of high Cr-V-Ti pellet, is preferably
25~26 parts；In a particular embodiment of the present invention, the consumption of high Cr-V-Ti pellet be 24,26,27 or 28 parts.The Gao Ge
Vanadium-titanium pellet is 97~99 by mass ratio:1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and bentonite pelletizing is made.
The conventional bar that the granularity that the vanadium titano-magnetite blast furnace ironmaking furnace charge that the present invention is provided includes 2~5 parts is 10~50mm
Ore deposit；Preferably 2~3 parts；In a particular embodiment of the present invention, the consumption of the common lump ore be 2,3,4 or 5 parts.It is described general
TFe mass contents are 40~50% and SiO in logical lump ore2Mass content is 15~25%.
In the present invention, the vanadium titano-magnetite blast furnace ironmaking furnace charge preferably includes 71~75 parts of high chromium high-Ti type V-Ti
Sintering deposit, 25~26 parts of high Cr-V-Ti pellet and 2~3 parts of granularity are 10~50mm common lump ore.Specifically, it is described
Vanadium titano-magnetite blast furnace ironmaking furnace charge includes 67 parts of high chromium high-Ti type V-Ti sintering deposit, 28 parts of high Cr-V-Ti pellet and 5
The granularity of part is 10~50mm common lump ore；69 parts of high chromium high-Ti type V-Ti sintering deposit, 27 parts of high Cr-V-Ti pellet
With the common lump ore that 4 parts of granularity is 10~50mm；71 parts of high chromium high-Ti type V-Ti sintering deposit, 26 parts of high Cr-V-Ti pelletizing
Ore deposit and the common lump ore that 3 parts of granularity is 10~50mm；73 parts of high chromium high-Ti type V-Ti sintering deposit, 25 parts of high Cr-V-Ti ball
Nodulizing and the common lump ore that 2 parts of granularity is 10~50mm.
The invention provides a kind of blast furnace process side of the vanadium titano-magnetite blast furnace ironmaking furnace charge described in above-mentioned technical proposal
Method, comprises the following steps：
High chromium high-Ti type V-Ti sintering deposit, high Cr-V-Ti pellet and granularity are being blown for 10~50mm common lump ore
Smelted under conditions of the low high silica flour of iron and coal dust；
TFe mass contents are 20~40% and SiO in the high silica flour of low iron2Mass content is 25~45%.
In the present invention, the injection quality of the high silica flour of low iron preferably accounts for the 2~10% of coal dust.
In the present invention, the wind-warm syndrome of the smelting is preferably 1200~1250 DEG C；The oxygen enrichment percentage of smelting is preferably 2~5%；
TiO in the clinker of smelting2Mass content be preferably 22~23%；The basicity of the clinker of smelting is preferably 1.05~1.10.
In the present invention, the injection amount of the coal dust is preferably 130~160kg/tFe.
The smelting process can be effectively improved the metallurgical performance of the high titanium clinker containing chromium, reduce the melting temperature of clinker, so that
Strengthen the blast furnace process of high chromium high-titanium type vanadium-titanium magnetite, production cost is reduced, with significant economic benefit.
In order to further illustrate the present invention, a kind of high chromium high-Ti type V-Ti magnetic provided with reference to embodiment the present invention
Iron ore blast furnace ironmaking furnace charge and its blast furnace smelting method are described in detail, but can not be interpreted as them to present invention protection
The restriction of scope.
Embodiment 1
Step one：Sintering deposit will be made after high chromium high-Ti type V-Ti fine ore and common Iron Ore Powder and auxiliary material dispensing, sinters
High chromium high-titanium type vanadium ilmenite concentrate quality proportioning in ore deposit is controlled between 40% to 50%, common Iron Ore Powder 20~40%, coke powder 4
~5%, flux：10~15%, the basicity of sintering deposit is controlled between 2.2 to 2.5；
Step 2：Pellet is made in high chromium high-Ti type V-Ti fine ore, raw material contains the component of following weight proportion, it is high
The ferromagnetic iron ore concentrate 97~99% of chromium high-titanium type vanadium, bentonite 1~3%；
Step 3：By mass percentage by 67% sintering deposit, 28% pellet and 5% common lump ore supplying blast furnace；
Step 4：Blast furnace is smelted, design parameter：1220 DEG C of wind-warm syndrome, oxygen enrichment percentage reaches 2%, injection coal amount 130~
160kg/tFe, clinker (TiO2) 22%, blast furnace basicity of slag is controlled 1.05~1.10；
The high silica flour ore deposit of low iron of injection enters coal pulverizer together with coal dust and carries out fine grinding, then sprays into blast furnace with coal dust
Smelted, injection amount is the 3% of coal dust.
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that the embodiment of the present invention 1 is provided are shown in Table 1, and table 1 is this
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that inventive embodiments 1~4 are provided：
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that the embodiment of the present invention 1~4 of table 1 is provided
From table 1, the raising matched with sintering deposit, the reduction of common lump ore proportioning and blast furnace fine ore injection amount are carried
Height, the increase of wind-warm syndrome, the raising of oxygen enrichment percentage realizes the reinforcing of blast furnace process, and the capacity factor of a blast furnace gradually increases.In clinker
TiO2Content is up under conditions of 22~23%, realizes the normal smelting of high chromium high-titanium type vanadium-titanium magnetite blast furnace.
Embodiment 2
Step one：Sintering deposit will be made after high chromium high-Ti type V-Ti fine ore and common Iron Ore Powder and auxiliary material dispensing, sinters
High chromium high-titanium type vanadium ilmenite concentrate quality proportioning in ore deposit is controlled between 40% to 50%, common Iron Ore Powder 20~40%, coke powder 4
~5%, flux：10~15%, the basicity of sintering deposit is controlled between 2.2 to 2.5；
Step 2：Pellet is made in high chromium high-Ti type V-Ti fine ore, raw material contains the component of following weight proportion, it is high
The ferromagnetic iron ore concentrate 97~99% of chromium high-titanium type vanadium, bentonite 1~3%；
Step 3：By mass percentage by 69% sintering deposit, 27% pellet and 4% common lump ore supplying blast furnace；
Step 4：Blast furnace is smelted, design parameter：1225 DEG C of wind-warm syndrome, oxygen enrichment percentage reaches 3%, injection coal amount 130~
160kg/tFe, clinker (TiO2) 22.2%, blast furnace basicity of slag is controlled 1.05~1.10；
The high silica flour ore deposit of low iron of injection enters coal pulverizer together with coal dust and carries out fine grinding, then sprays into blast furnace with coal dust
Smelted, injection amount is the 4% of coal dust.
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that the embodiment of the present invention 2 is provided are shown in Table 1.
Embodiment 3
Step one：Sintering deposit will be made after high chromium high-Ti type V-Ti fine ore and common Iron Ore Powder and auxiliary material dispensing, sinters
High chromium high-titanium type vanadium ilmenite concentrate quality proportioning in ore deposit is controlled between 40% to 50%, common Iron Ore Powder 20~40%, coke powder 4
~5%, flux：10~15%, the basicity of sintering deposit is controlled between 2.2 to 2.5；
Step 2：Pellet is made in high chromium high-Ti type V-Ti fine ore, raw material contains the component of following weight proportion, it is high
The ferromagnetic iron ore concentrate 97~99% of chromium high-titanium type vanadium, bentonite 1~3%；
Step 3：By mass percentage by 71% sintering deposit, 26% pellet and 3% common lump ore supplying blast furnace；
Step 4：Blast furnace is smelted, design parameter：1230 DEG C of wind-warm syndrome, oxygen enrichment percentage reaches 4%, injection coal amount 130~
160kg/tFe, clinker (TiO2) 22.5%, blast furnace basicity of slag is controlled 1.05~1.10；
The high silica flour ore deposit of low iron of injection enters coal pulverizer together with coal dust and carries out fine grinding, then sprays into blast furnace with coal dust
Smelted, injection amount is the 5% of coal dust.
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that the embodiment of the present invention 3 is provided are shown in Table 1.
Embodiment 4
Step one：Sintering deposit will be made after high chromium high-Ti type V-Ti fine ore and common Iron Ore Powder and auxiliary material dispensing, sinters
High chromium high-titanium type vanadium ilmenite concentrate quality proportioning in ore deposit is controlled between 40% to 50%, common Iron Ore Powder 20~40%, coke powder 4
~5%, flux：10~15%, the basicity of sintering deposit is controlled between 2.2 to 2.5；
Step 2：Pellet is made in high chromium high-Ti type V-Ti fine ore, raw material contains the component of following weight proportion, it is high
The ferromagnetic iron ore concentrate 97~99% of chromium high-titanium type vanadium, bentonite 1~3%；
Step 3：By mass percentage by 73% sintering deposit, 25% pellet and 2% common lump ore supplying blast furnace；
Step 4：Blast furnace is smelted, design parameter：1240 DEG C of wind-warm syndrome, oxygen enrichment percentage reaches 5%, injection coal amount 130~
160kg/tFe, clinker (TiO2) 22.7%, blast furnace basicity of slag is controlled 1.05~1.10；
The high silica flour ore deposit of low iron of injection enters coal pulverizer together with coal dust and carries out fine grinding, then sprays into blast furnace with coal dust
Smelted, injection amount is the 6% of coal dust.
The blast furnace process experiment parameter and the capacity factor of a blast furnace for the furnace charge that the embodiment of the present invention 4 is provided are shown in Table 1.
As seen from the above embodiment, the invention provides a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge, in terms of parts by weight,
Including following components：65~75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~30 parts of high Cr-V-Ti pellet and 2~5 parts
Granularity be 10~50mm common lump ore；The high Cr-V-Ti sintering deposit is smart by 40~50 parts of high chromium high-Ti type V-Ti magnet
Ore deposit, 20~40 parts of common iron ore, 4~5 parts of fuel and 10~15 parts of flux sintering are made；The high chromium high-Ti type V-Ti
Cr in magnetite concentrate2O3Mass content be 1.0~1.9%, TiO2Mass content be 12~13%；The high Cr-V-Ti ball
Nodulizing is made by 97~99 parts of the high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and 1~3 part of bentonite pelletizing；In the common lump ore
TFe mass contents are 40~50% and SiO2Mass content is 15~25%.The furnace charge can intensification of smelting process in BF, and blast furnace profit
It is higher with coefficient.Test result indicates that：The capacity factor of a blast furnace is 2.50~2.58t/m3.d。
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of vanadium titano-magnetite blast furnace ironmaking furnace charge, in terms of parts by weight, including following components：
65~75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~30 parts of high Cr-V-Ti pellet and 2~5 parts of granularity is 10
~50mm common lump ore；
The high Cr-V-Ti sintering deposit is 40~50 by mass ratio:20~40:4~5:10~15 high chromium high-Ti type V-Ti magnet
Concentrate, common iron ore, fuel and flux sintering are made；Cr in the high chromium high-Ti type V-Ti magnetite concentrate2O3Mass content be
1.0~1.9%, TiO2Mass content be 12~13%；
The high Cr-V-Ti pellet is 97~99 by mass ratio:1~3 high ferromagnetic iron ore concentrate of chromium high-titanium type vanadium and swelling are made with local methods
Ball is made；
TFe mass contents are 40~50% and SiO in the common lump ore2Mass content is 15~25%.
2. vanadium titano-magnetite blast furnace ironmaking furnace charge according to claim 1, it is characterised in that the high chromium high-Ti type V-Ti
The basicity of sintering deposit is 2.2~2.5.
3. vanadium titano-magnetite blast furnace ironmaking furnace charge according to claim 1, it is characterised in that the fuel is selected from coke powder；
The flux is selected from quick lime and/or lime stone.
4. vanadium titano-magnetite blast furnace ironmaking furnace charge according to claim 1, it is characterised in that the vanadium titano-magnetite blast furnace
Iron-smelting furnace charge includes 71~75 parts of high chromium high-Ti type V-Ti sintering deposit, 25~26 parts of high Cr-V-Ti pellet and 2~3 parts
Granularity is 10~50mm common lump ore.
5. a kind of blast furnace smelting method of the vanadium titano-magnetite blast furnace ironmaking furnace charge described in claim 1, comprises the following steps：
High chromium high-Ti type V-Ti sintering deposit, high Cr-V-Ti pellet and granularity are being blown low iron for 10~50mm common lump ore
Smelted under conditions of high silica flour and coal dust；
TFe mass contents are 20~40% and SiO in the high silica flour of low iron2Mass content is 25~45%.
6. blast furnace smelting method according to claim 5, it is characterised in that the injection quality of the low high silica flour of iron accounts for coal
The 2~10% of powder.
7. blast furnace smelting method according to claim 5, it is characterised in that the wind-warm syndrome of the smelting is 1200~1250
℃；The oxygen enrichment percentage of smelting is 2~5%；TiO in the clinker of smelting2Mass content be 22~23%.
8. blast furnace smelting method according to claim 5, it is characterised in that the injection amount of the coal dust is 130~
160kg/tFe。
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| 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 |
| CN108842016A (en) * | 2018-08-21 | 2018-11-20 | 成渝钒钛科技有限公司 | Improve the method that schreyerite smelts productivity |
| CN110672458A (en) * | 2019-09-04 | 2020-01-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for rapidly evaluating vanadium-titanium magnetite concentrate agglomeration economy |
| CN110727917A (en) * | 2019-09-04 | 2020-01-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium magnetite concentrate blast furnace smelting added imported ore and critical unit price analysis method thereof |
| CN112695143A (en) * | 2020-12-11 | 2021-04-23 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method of vanadium titano-magnetite |
| CN114891937A (en) * | 2022-06-27 | 2022-08-12 | 东北大学 | Process for blast furnace smelting and vanadium-titanium-chromium synchronous utilization of high-titanium and high-chromium type vanadium-titanium magnetite |
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Application publication date: 20170912 |