CN104060007A - Method for blast furnace smelting of vanadium titanium magnetite - Google Patents
Method for blast furnace smelting of vanadium titanium magnetite Download PDFInfo
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- CN104060007A CN104060007A CN201310235017.0A CN201310235017A CN104060007A CN 104060007 A CN104060007 A CN 104060007A CN 201310235017 A CN201310235017 A CN 201310235017A CN 104060007 A CN104060007 A CN 104060007A
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- vanadium
- fluorspar powder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The invention discloses a method for blast furnace smelting of a vanadium titanium magnetite, and is characterized in that the method comprises the steps: in the process of blast furnace smelting of the vanadium titanium magnetite, spraying and blowing a fuel and a fluorite powder into a blast furnace through an air port. With adopting of the method for blast furnace smelting of the vanadium titanium magnetite, the content of iron in slag iron can be significantly reduced, and the total fuel ratio can be reduced.
Description
Technical field
The present invention relates to a kind of method of vanadium titano-magnetite blast-furnace smelting.
Background technology
At present, blast-furnace smelting method for vanadium titano-magnetite mainly comprises conventionally: sefstromite concentrate and common fine ore are carried out to SINTERING PRODUCTION and go out agglomerate, produce pellet with sefstromite concentrate and common iron concentrate pelletization, again agglomerate, pellet and a small amount of lump ore according to a certain percentage, join together with coke in blast furnace, by Blast Furnace Injection coal dust and blast air, the coal dust of coke and winding-up is burnt, generation reducing gas (is mainly CO and H simultaneously
2), in the process that reducing gas rises in stove, remove the oxygen in vanadium titano-magnetite, reduction obtains iron, then dissolves to drop onto cupola well and realize slag, iron and separate, thus the smelting process of completing.
But the titanium content in vanadium titano-magnetite is higher, make TiO in slag
2content is higher, and TiO
2cross reduction and can generate dystectic Low-valent Titanium (as TiC, TiN and TiCN).These Low-valent Titaniums are adsorbed on little iron shot, and the surface tension of little iron shot is increased, and grow up thereby be difficult to polymerization, cause the little iron shot that has a large amount of disperses in slag.And the content of Low-valent Titanium described in slag is higher, corresponding high-melting-point mineral are also more, cause slag melting temperature to rise, and slag viscosity raises, slag iron separation difficulty.In the slag that these factors cause producing in vanadium titano-magnetite blast furnace ironmaking process, iron-holder is higher, thereby causes a large amount of iron losses, and the loss amount of iron is up to 6-8 % by weight conventionally.
Summary of the invention
The melting temperature that the object of the invention is to overcome high titanium type slag in prior art is high, and the problem of slag iron separation difficulty provides a kind of novel method of vanadium titano-magnetite blast-furnace smelting.
To achieve these goals, the invention provides a kind of method of vanadium titano-magnetite blast-furnace smelting, the method comprises: in the process of vanadium titano-magnetite blast-furnace smelting, by air port to fuel injection and Fluorspar Powder in blast furnace.
Method provided by the invention to fuel injection and Fluorspar Powder in blast furnace, had both improved the utilization ratio of Fluorspar Powder by air port, and the useful space that the block fluorites of also having avoided adding from furnace roof have in a large number occupied blast furnace has absorbed a large amount of heats simultaneously.The Fluorspar Powder spraying into from air port reacts direct and slag containing titanium and vanadium, improves the character of slag, realizes the better separation of slag iron, reduces the object with iron, reduction fuel ratio in slag thereby realize.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
A kind of method that the invention provides vanadium titano-magnetite blast-furnace smelting, the method comprises: in the process of vanadium titano-magnetite blast-furnace smelting, by air port to fuel injection and Fluorspar Powder in blast furnace.
Contriver finds, only need, by air port to fuel injection and Fluorspar Powder in blast furnace, can realize object of the present invention,, improves the character of slag that is, realizes the better separation of slag iron.Described Fluorspar Powder is that the conventional fluorite in this area processes.In order better to realize object of the present invention, under preferable case, the weight ratio of described fuel and Fluorspar Powder is 1:(0.01-0.05), the granularity of described Fluorspar Powder is less than 0.1mm.Further preferably, the weight ratio of described fuel and Fluorspar Powder is 1:(0.02-0.04), the granularity of described Fluorspar Powder is 0.05-0.08mm.In the present invention, the granularity of Fluorspar Powder uses the mesh size that obtains the screen cloth of Fluorspar Powder particle by screening to represent.
In described method of the present invention, described fuel can be selected according to practical condition.Can be for example Sweet natural gas, heavy oil, coal dust etc.Under preferable case, described fuel is coal dust.The particle diameter of described coal dust can be 50-120 micron, is preferably 60-100 micron, more preferably 70-80 micron.The coal of described coal dust does not have special requirement, for example, can be made up of at least one in hard coal, lean coal, bituminous coal and brown coal.
In described method of the present invention, the carrier gas used of described fuel injection and Fluorspar Powder can be selected according to practical condition.For example, described carrier gas can be pressurized air.Under preferable case, described compressed-air actuated temperature is 10-25 DEG C, and pressure is 800-1200kPa.In the present invention, pressure refers to absolute pressure.
In the present invention, there is no special requirement for described vanadium titano-magnetite raw material, can need to suitably select vanadium titano-magnetite raw material according to blast-furnace smelting.Under preferable case, described vanadium titano-magnetite raw material contains vanadium titanium agglomerate, vanadium-titanium pellet and lump ore, the described vanadium titanium agglomerate agglomerate that the mixture sintering that contains sefstromite concentrate and common iron ore concentrate obtains of serving as reasons, described vanadium-titanium pellet is the pellet being obtained by sefstromite concentrate roasting or the pellet being obtained by the mixture roasting that contains sefstromite concentrate and common iron ore concentrate, described common iron ore concentrate is that described lump ore is common rhombohedral iron ore lump ore not containing the iron ore concentrate of v element and titanium elements.Further preferably, described vanadium titano-magnetite raw material contains 60-80 % by weight described vanadium titanium agglomerate, the described lump ore of 3-12 % by weight and the described vanadium-titanium pellet of 5-35 % by weight.In the present invention, described common iron ore concentrate refers to not containing vanadium and titanium elements or only contains micro-vanadium, the iron ore concentrate of titanium elements; Described common rhombohedral iron ore lump ore refers to the rhombohedral iron ore lump ore that does not contain vanadium and titanium elements or only contain micro-vanadium, titanium elements.
In described method of the present invention, the condition of described vanadium titano-magnetite blast-furnace smelting does not have strict requirement, can in conventional blast furnace smelting method, suitably select.Under preferable case, the condition of described smelting comprises: draught temperature is 1200-1250 DEG C, and furnace top pressure is 120-200kPa.
Below will describe the present invention by embodiment.
In following examples and comparative example
Vanadium titanium agglomerate (TFe49-51%, FeO7-8%, TiO
26-8%) come from and climb steel iron work;
Common rhombohedral iron ore lump ore (TFe45-50%, FeO2-5%, SiO
218-20%) come from Huili County;
Vanadium-titanium pellet (TFe53-55%, FeO1-2%, TiO
28-10%) come from Flos Bombacis Malabarici steel city enterprise-like corporation;
Coke (C80-82%, A12.5-13.5%, CSR58-60%) comes from Pan Gang coke-oven plant;
Hard coal, lean coal come from Panzhihua City mineral bureau.
In the slag that embodiment and comparative example obtain, the measuring method of Fe content is according to TiCl
3reduction dichromate titration records;
Total fuel ratio of embodiment and comparative example calculates according to following calculating formula:
The add-on (kg/ ton iron) of winding-up amount (kg/ ton the iron)+coke of total fuel ratio (kg/ ton iron)=coal dust.
Embodiment 1
The present embodiment is used for illustrating described blast-furnace smelting method for vanadium titano-magnetite of the present invention.
70 weight part vanadium titanium agglomerate, the common rhombohedral iron ore lump ore of 8 weight part, 22 weight part vanadium-titanium pellets and coke are added to 1200m
3blast furnace in smelt; Simultaneously, by particle diameter be about Fluorspar Powder that the coal dust (60 % by weight hard coal+40 % by weight lean coal) of 74 microns and particle diameter are 0.05mm according to weight ratio 1:0.03 by Blast Furnace Injection in blast furnace, the carrier gas used of jetting is pressurized air, compressed-air actuated temperature is 15 DEG C, and pressure is 900kPa.
The winding-up amount of coal dust is about 120kg/ ton iron.It is 1220 DEG C that blast-furnace tuyere temperature (being also wind-warm syndrome) is controlled, and is 137kPa by top pressure control.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Embodiment 2
The present embodiment is used for illustrating described blast-furnace smelting method for vanadium titano-magnetite of the present invention.
70 weight part vanadium titanium agglomerate, the common rhombohedral iron ore lump ore of 8 weight part, 22 weight part vanadium-titanium pellets and coke are added to 1200m
3blast furnace in smelt; Simultaneously, by particle diameter be about Fluorspar Powder that the coal dust (60 % by weight bituminous coal+40 % by weight brown coal) of 100 microns and particle diameter are 0.08mm according to weight ratio 1:0.04 by Blast Furnace Injection in blast furnace, the carrier gas used of jetting is pressurized air, compressed-air actuated temperature is 25 DEG C, and pressure is 1200kPa.
The winding-up amount of coal dust is about 120kg/ ton iron.It is 1250 DEG C that blast-furnace tuyere temperature (being also wind-warm syndrome) is controlled, and is 120kPa by top pressure control.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Embodiment 3
The present embodiment is used for illustrating described blast-furnace smelting method for vanadium titano-magnetite of the present invention.
70 weight part vanadium titanium agglomerate, the common rhombohedral iron ore lump ore of 8 weight part, 22 weight part vanadium-titanium pellets and coke are added to 1200m
3blast furnace in smelt; Simultaneously, by particle diameter be about Fluorspar Powder that the coal dust (60 % by weight lean coal+40 % by weight bituminous coal) of 50 microns and particle diameter are 0.09mm according to weight ratio 1:0.01 by Blast Furnace Injection in blast furnace, the carrier gas used of jetting is pressurized air, compressed-air actuated temperature is 10 DEG C, and pressure is 800kPa.
The winding-up amount of coal dust is about 120kg/ ton iron.It is 1200 DEG C that blast-furnace tuyere temperature (being also wind-warm syndrome) is controlled, and is 200kPa by top pressure control.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Embodiment 4
The method that adopts embodiment 1, different, the particle diameter of Fluorspar Powder is 0.09mm, the weight ratio of coal dust and Fluorspar Powder is 1:0.05.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Embodiment 5
The method that adopts embodiment 1, different, the particle diameter of coal dust is 50 microns, the winding-up amount of coal dust is about 140kg/ ton iron.It is 1250 DEG C that blast-furnace tuyere temperature (being also wind-warm syndrome) is controlled, and is 125kPa by top pressure control.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Comparative example 1
The method that adopts embodiment 1, different, not by tuyere injection Fluorspar Powder.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Comparative example 2
The method that adopts embodiment 2, different,, by tuyere injection Fluorspar Powder, do not add block fluorite (particle diameter is about 10-40mm) from furnace roof, fluorite add-on is 8kg/tFe.
In above-mentioned smelting process, the iron level in the slag of generation and total fuel ratio are as shown in table 1 below.
Table 1
| Numbering | Iron level in slag (% by weight) | Total fuel ratio (kg/ ton iron) |
| Embodiment 1 | 2.7 | 560 |
| Embodiment 2 | 2.8 | 562 |
| Embodiment 3 | 3.4 | 569 |
| Embodiment 4 | 3.5 | 570 |
| Embodiment 5 | 3.0 | 565 |
| Comparative example 1 | 4.5 | 580 |
| Comparative example 2 | 4.0 | 575 |
Data by above-mentioned table 1 can be found out, adopt described blast-furnace smelting method for vanadium titano-magnetite of the present invention can significantly reduce the iron level in slag iron, and can reduce total fuel ratio.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out arbitrary combination between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a method for vanadium titano-magnetite blast-furnace smelting, is characterized in that, the method comprises: in the process of vanadium titano-magnetite blast-furnace smelting, by air port to fuel injection and Fluorspar Powder in blast furnace.
2. blowing method according to claim 1, wherein, the weight ratio of described fuel and Fluorspar Powder is 1:(0.01-0.05), the granularity of described Fluorspar Powder is less than 0.1mm.
3. blowing method according to claim 2, wherein, the weight ratio of described fuel and Fluorspar Powder is 1:(0.02-0.04), the granularity of described Fluorspar Powder is 0.05-0.08mm.
4. according to the method described in any one in claim 1-3, wherein, described fuel is Sweet natural gas, heavy oil or coal dust.
5. method according to claim 4, wherein, described fuel is coal dust, described coal dust is made up of one or more in hard coal, lean coal, bituminous coal and brown coal.
6. method according to claim 5, wherein, the particle diameter of described coal dust is 50-120 micron.
7. method according to claim 6, wherein, the particle diameter of described coal dust is 60-100 micron.
8. according to the method described in any one in claim 1-3, wherein, the carrier gas used of described fuel injection and Fluorspar Powder is pressurized air, and described compressed-air actuated temperature is 10-25 DEG C, and pressure is 800-1200kPa.
9. according to the method described in any one in claim 1-3, wherein, in described vanadium titano-magnetite blast-furnace smelting raw material used, contain vanadium titanium agglomerate, vanadium-titanium pellet and lump ore, the described vanadium titanium agglomerate agglomerate that the mixture sintering that contains sefstromite concentrate and common iron ore concentrate obtains of serving as reasons, described vanadium-titanium pellet is the pellet being obtained by sefstromite concentrate roasting or the pellet being obtained by the mixture roasting that contains sefstromite concentrate and common iron ore concentrate, described common iron ore concentrate is the iron ore concentrate that does not contain v element and titanium elements, described lump ore is common rhombohedral iron ore lump ore.
10. according to the method described in any one in claim 1-3, wherein, the condition of described vanadium titano-magnetite blast-furnace smelting comprises: draught temperature is 1200-1250 DEG C, and furnace top pressure is 120-200kPa.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310235017.0A CN104060007B (en) | 2013-06-14 | 2013-06-14 | A kind of method of vanadium titano-magnetite blast furnace process |
| CA2849151A CA2849151C (en) | 2013-06-14 | 2014-04-16 | Method of smelting vanadium titano-magnetite in blast-furnace |
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|---|---|---|---|
| CN201310235017.0A CN104060007B (en) | 2013-06-14 | 2013-06-14 | A kind of method of vanadium titano-magnetite blast furnace process |
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| CN104060007A true CN104060007A (en) | 2014-09-24 |
| CN104060007B CN104060007B (en) | 2016-05-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN106191351A (en) * | 2016-08-31 | 2016-12-07 | 云南德胜钢铁有限公司 | A kind of method of blast furnace ironmaking |
| CN106755667A (en) * | 2016-11-10 | 2017-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | V-bearing titanomagnetite smelting coal dust additive and its application |
| CN107400745A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of the iron ore concentrate containing vanadium, titanium and chromium |
| CN115491453A (en) * | 2022-08-23 | 2022-12-20 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| WO2024066378A1 (en) * | 2022-09-29 | 2024-04-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Injection method for improving high-titanium slag property of vanadium-titanomagnetite smelting |
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| CN107400774A (en) * | 2017-07-27 | 2017-11-28 | 山西太钢不锈钢股份有限公司 | A kind of method for improving blast furnace vanadium-titanium pellet intensity |
| CN111455122B (en) * | 2020-05-08 | 2022-02-18 | 张岩 | Method for separating vanadium, titanium and iron from vanadium-titanium magnetite |
| CN114058751B (en) * | 2020-06-12 | 2022-11-01 | 武钢集团昆明钢铁股份有限公司 | Intensified smelting method for titanium slag in blast furnace |
| CN115814806B (en) * | 2021-11-12 | 2024-02-13 | 中国矿业大学 | Vanadium titano-magnetite-coke powder composite material and preparation method and application thereof |
| CN114686627B (en) * | 2022-04-08 | 2023-08-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace iron-making furnace burden of vanadium titano-magnetite and smelting method thereof |
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| CN101775451A (en) * | 2010-03-26 | 2010-07-14 | 中南大学 | Blast-furnace smelting method for vanadium titano-magnetite |
| CN101962696A (en) * | 2010-11-01 | 2011-02-02 | 河北钢铁股份有限公司承德分公司 | Method for blowing furnace washing agent by using air inlet of blast furnace |
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- 2013-06-14 CN CN201310235017.0A patent/CN104060007B/en not_active Expired - Fee Related
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- 2014-04-16 CA CA2849151A patent/CA2849151C/en active Active
Patent Citations (2)
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|---|---|---|---|---|
| CN101775451A (en) * | 2010-03-26 | 2010-07-14 | 中南大学 | Blast-furnace smelting method for vanadium titano-magnetite |
| CN101962696A (en) * | 2010-11-01 | 2011-02-02 | 河北钢铁股份有限公司承德分公司 | Method for blowing furnace washing agent by using air inlet of blast furnace |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN106191351A (en) * | 2016-08-31 | 2016-12-07 | 云南德胜钢铁有限公司 | A kind of method of blast furnace ironmaking |
| CN106755667A (en) * | 2016-11-10 | 2017-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | V-bearing titanomagnetite smelting coal dust additive and its application |
| CN107400745A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of the iron ore concentrate containing vanadium, titanium and chromium |
| CN115491453A (en) * | 2022-08-23 | 2022-12-20 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| CN115491453B (en) * | 2022-08-23 | 2023-12-19 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| WO2024066378A1 (en) * | 2022-09-29 | 2024-04-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Injection method for improving high-titanium slag property of vanadium-titanomagnetite smelting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104060007B (en) | 2016-05-04 |
| CA2849151A1 (en) | 2014-12-14 |
| CA2849151C (en) | 2017-10-03 |
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