CN109957635A - A kind of carbon-based vanadium slag modifying agent and its method applied to efficient vanadium extraction by converter blowing - Google Patents
A kind of carbon-based vanadium slag modifying agent and its method applied to efficient vanadium extraction by converter blowing Download PDFInfo
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- CN109957635A CN109957635A CN201910249081.1A CN201910249081A CN109957635A CN 109957635 A CN109957635 A CN 109957635A CN 201910249081 A CN201910249081 A CN 201910249081A CN 109957635 A CN109957635 A CN 109957635A
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- carbon
- vanadium slag
- modifying agent
- vanadium
- converter
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a kind of carbon-based vanadium slag modifying agent and its applied to the method for efficient vanadium extraction by converter blowing, the carbon-based vanadium slag modifying agent is made of 10~20wt% graphite, 10~30wt% coking coal and 60~80wt% anthracite.Carbon-based vanadium slag modifying agent is applied to the method for efficient vanadium extraction by converter blowing are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag modifying agent and simultaneously 1~3min of nitrogen flushing gas agitating are put into converter slag liquid level, or carbon-based vanadium slag modifying agent is blown into converter, converter extracting vanadium stands 1~3min later, and then furnace goes out half steel and vanadium slag；The carbon-based vanadium slag modifying agent additional amount is 2.0~5.0kg/t steel.Present invention reduces vanadium slag oxidisability and steel technology, FeO content in vanadium slag is set to be reduced to 8~20%, adhesiveness improves；The carbon content in half steel is improved simultaneously, is played semi-steel making concurrent heating effect, is promoted converter semi-steel making effect.
Description
Technical field
The invention belongs to vanadium extraction by converter blowing technical fields, and in particular to a kind of carbon-based vanadium slag modifying agent and its be applied to efficiently turn
The method of furnace vanadium extraction.
Background technique
Vanadium extraction by converter blowing technique be mainly the technologies such as top and bottom complex blowing and the dedicated oxygen rifle of vanadium extraction by the vanadium in molten iron aoxidize into
Enter vanadium slag, obtains the half steel for meeting next step steel-making requirements.In vanadium extracting process, pig iron containing vanadium block, iron ore, iron oxide is added
The bulk coolant such as ball controls bath temperature, slows down molten bath heating rate, extends the vanadium extraction reaction time, " remove vanadium to reach
The purpose of guarantor's carbon ".
Vanadium unit cellulose content is usually less than 0.5% in vanadium-bearing hot metal, and vanadium extracting process is mainly in vanadium and first slag in vanadium-bearing hot metal
FeO between reacted, enter in slag so that vanadium in molten iron be made to aoxidize, therefore, after vanadium extraction, FeO content in vanadium slag
Height, about 30~50%, vanadium slag adhesiveness is low, and part vanadium slag enters in ladle with half steel when converter tapping causes vanadium slag to be lost, together
When pouring out vanadium slag, a large amount of FeO are poured out with vanadium slag in vanadium slag, so that a large amount of metallic irons be caused to be lost, and influence v slag grade and
The rate of recovery.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of carbon-based vanadium slag modifying agent and its it is applied to efficient vanadium extraction by converter blowing
Method.The present invention can reduce FeO content in vanadium slag, improve v slag grade, improve the vanadium slag rate of recovery, realize that converter efficiently mentions
Vanadium.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of carbon-based vanadium slag modifying agent, it is described carbon-based
Vanadium slag modifying agent is made of 10~20wt% graphite, 10~30wt% coking coal and 60~80wt% anthracite.
Graphite phosphorus content >=80% of the present invention, coking coal phosphorus content >=80%, anthracite phosphorus content >=90%.
The present invention also provides a kind of method that carbon-based vanadium slag modifying agent is applied to efficient vanadium extraction by converter blowing, the methods are as follows:
After vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag modifying agent and simultaneously 1~3min of nitrogen flushing gas agitating are put into converter slag liquid level, or
Carbon-based vanadium slag modifying agent is blown into converter, converter extracting vanadium stands 1~3min later, and then furnace goes out half steel and vanadium slag；It is described
Carbon-based vanadium slag modifying agent additional amount is 2.0~5.0kg/t steel.
It is of the present invention to put into carbon-based vanadium slag modifying agent and simultaneously nitrogen flushing gas agitating, nitrogen flushing stirring stream to converter slag liquid level
Speed is 20~40m3/min。
The carbon-based vanadium slag modifying agent of blowing of the present invention, injection method is including the use of bottom air brick or bottom spray gun from turning
Furnace bottom blowing, using dedicated oxygen rifle at the top of the converter blowing or using side-blown spray gun from converter side to blowing.
Carbon-based vanadium slag modifier particle sizes of the present invention are 1~3mm.
The carbon-based vanadium slag modifying agent of blowing of the present invention, injecting velocity are 200~400kg/min.
FeO content is reduced to 8~20% in the method for the invention treated vanadium slag.
The principle of the present invention is:
FeO reaction equation in carbon and vanadium slag are as follows: C+(FeO)=[Fe]+CO ↑.
After vanadium slag surface is added in the carbon-based vanadium slag modifying agent of the present invention, in modifying agent C reacted with FeO in vanadium slag the CO of generation into
Enter in furnace gas, the iron rule of reduction enters in half steel, to reduce vanadium slag oxidisability and steel technology, and will not improve vanadium slag
Middle other compositions content and increase other substances.By nitrogen gas stirring, modifier particle sizes are controlled in 1~3mm, it is possible to increase modifying agent
With the contact area of vanadium slag, C in modifying agent is promoted to react with FeO in vanadium slag, in raising modifying agent C in vanadium slag FeO it is anti-
Speed is answered, the processing time is shortened, guarantees rhythm of production direct motion.
The beneficial effects of adopting the technical scheme are that vanadium slag table is added in 1, the carbon-based vanadium slag modifying agent of the present invention
Behind face, C reacts the CO generated with FeO in vanadium slag and enters in furnace gas in modifying agent, and the iron rule of reduction enters in half steel, to reduce
Vanadium slag oxidisability and steel technology, and other compositions content in vanadium slag will not be improved and increase other substances.2, of the invention
By nitrogen gas stirring, modifier particle sizes are controlled in 1~3mm, it is possible to increase the contact area of modifying agent and vanadium slag promotes in modifying agent
C is reacted with FeO in vanadium slag, is improved the reaction speed of FeO in C and vanadium slag in modifying agent, is shortened the processing time, guarantee production section
Play direct motion.3, the present invention makes the reduction of vanadium slag oxidisability, and adhesiveness improves, and reduces steel technology, reduces vanadium slag loss, together
When, carbon dissolution enters in half steel in the carbon-based vanadium slag modifying agent in part, improves the carbon content in half steel, plays half steel refining
Steel concurrent heating effect promotes converter semi-steel making effect.4, in the method for the present invention treated vanadium slag FeO content be reduced to 8~
20%。
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Carbon-based vanadium slag modifying agent passes through ball milling-mixing-bonding-solidification-baking by graphite, coking coal and anthracite in following instance
Dry technique is made, and wherein graphite, coking coal and anthracite physical and chemical index are as shown in table 1.
1 graphite of table, coking coal and anthracite physical and chemical index
| Title | Carbon content/% | S content/% | P content/% | H2O/% | Ash content/% | Volatile matter/% | Caking index/% |
| Graphite | ≥80 | ≤0.05 | ≤0.03 | ≤0.5 | ≤13 | ≤5 | |
| Coking coal | ≥80 | ≤0.5 | ≤0.01 | ≤5.0 | ≤10 | ≤20 | ≥85 |
| Anthracite | ≥90 | ≤0.25 | ≤0.01 | ≤5.0 | ≤15 | ≤10 |
Embodiment 1
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 110t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag is put into converter slag liquid level by high hopper and is modified
Agent 2.5kg/t steel, while nitrogen flushing gas agitating 1min, nitrogen flow rate 40m3/ min, converter extracting vanadium stands 2min later, then falls
Furnace goes out half steel and vanadium slag；Carbon-based vanadium slag modifying agent group becomes 10wt% graphite, and 30wt% coking coal and 60wt% anthracite, granularity are
1.2mm, phosphorus content 92.2%.
Through examining, FeO content is 19% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 2
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 115t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag is put into converter slag liquid level by high hopper and is modified
Agent 5.0kg/t steel, while nitrogen flushing gas agitating 3min, nitrogen flow rate 30m3/ min, converter extracting vanadium stands 3min later, then falls
Furnace goes out half steel and vanadium slag；Carbon-based vanadium slag modifying agent group becomes 10wt% graphite, and 10wt% coking coal and 80wt% anthracite, granularity are
1.8mm, phosphorus content 94.9%.
Through examining, FeO content is 20% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 3
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 105t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag is put into converter slag liquid level by high hopper and is modified
Agent 2.0kg/t steel, while nitrogen flushing gas agitating 1.5min, nitrogen flow rate 35m3/ min, converter extracting vanadium stands 1.0min later, so
The furnace that falls afterwards goes out half steel and vanadium slag；Carbon-based vanadium slag modifying agent group becomes 15wt% graphite, 20wt% coking coal and 65wt% anthracite, granularity
For 2.5mm, phosphorus content 91.2%.
Through examining, FeO content is 15% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 4
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 112t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, be blown carbon-based vanadium slag modifying agent from converter bottom using bottom air brick
3kg/t steel, injecting velocity 200kg/min, converter extracting vanadium stands 1.5min later, and then furnace goes out half steel and vanadium slag；It is carbon-based
Vanadium slag modifying agent group becomes 15wt% graphite, 25wt% coking coal and 60wt% anthracite, granularity 2.2mm, phosphorus content 90.5%.
Through examining, FeO content is 10% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 5
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 108t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, be blown carbon-based vanadium slag modifying agent from converter bottom using bottom spray gun
4.5kg/t steel, injecting velocity 300kg/min, converter extracting vanadium stands 2.5min later, and then furnace goes out half steel and vanadium slag；Carbon
Base vanadium slag modifying agent group becomes 15wt% graphite, 10wt% coking coal and 75wt% anthracite, granularity 1.0mm, phosphorus content 94.3%.
Through examining, FeO content is 8% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 6
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 100t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag modifying agent is blown at the top of converter using dedicated oxygen rifle
3.5kg/t steel, injecting velocity 400kg/min, converter extracting vanadium stands 1.5min later, and then furnace goes out half steel and vanadium slag；Carbon
Base vanadium slag modifying agent group becomes 20wt% graphite, 10wt% coking coal and 70wt% anthracite, granularity 1.5mm, phosphorus content 93.5%.
Through examining, FeO content is 12% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 7
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 105t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, using side-blown spray gun from converter side to being blown carbon-based vanadium slag modifying agent
4.5kg/t steel, injecting velocity 280kg/min, converter extracting vanadium stands 3.0min later, and then furnace goes out half steel and vanadium slag；Carbon
Base vanadium slag modifying agent group becomes 15wt% graphite, 25wt% coking coal and 60wt% anthracite, granularity 3.0mm, phosphorus content 90%.
Through examining, FeO content is 18% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Embodiment 8
The present embodiment uses 100 tons of converter extracting vanadiums, and half steel tap is 110t, realizes efficient converter using carbon-based vanadium slag modifying agent
The method of vanadium extraction are as follows: after vanadium extraction by converter blowing oxygen blast, carbon-based vanadium slag is put into converter slag liquid level by high hopper and is modified
Agent 2.8kg/t steel, while nitrogen flushing gas agitating 3.0min, nitrogen flow rate 20m3/ min, converter extracting vanadium stands 2.5min later, so
The furnace that falls afterwards goes out half steel and vanadium slag；Carbon-based vanadium slag modifying agent group becomes 20wt% graphite, 10wt% coking coal and 70wt% anthracite, granularity
For 2.7mm, phosphorus content 87%.
Through examining, FeO content is 20% in the present embodiment method treated vanadium slag, effectively reduces steel technology,
Vanadium slag adhesiveness significantly improves simultaneously, reduces vanadium slag loss, improves v slag grade.
Comparative example 1
This comparative example uses 100 tons of converter extracting vanadiums, and half steel tap is 110t, after vanadium extraction by converter blowing, directly half steel and vanadium out
Slag.
Through examining, FeO content is 43% in vanadium slag, and vanadium slag adhesiveness is low, and pushing off the slag effect is poor, and part vanadium slag is lost.
Comparative example 1 and 1 condition of embodiment are essentially identical, and the two difference is that carbon-based vanadium slag is not added in comparative example 1 to be modified
Agent and converter stand operation.
In conclusion the present invention realizes efficient vanadium extraction by converter blowing using carbon-based vanadium slag modifying agent, guaranteeing v slag grade situation
Under, FeO content in vanadium slag is significantly reduced, vanadium slag oxidisability reduces, and adhesiveness improves, and reduces steel technology, reduces
Vanadium slag is lost.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (8)
1. a kind of carbon-based vanadium slag modifying agent, which is characterized in that the carbon-based vanadium slag modifying agent by 10~20wt% graphite, 10~
30wt% coking coal and 60~80wt% anthracite composition.
2. a kind of carbon-based vanadium slag modifying agent according to claim 1, which is characterized in that graphite phosphorus content >=80%, it is burnt
Coal phosphorus content >=80%, anthracite phosphorus content >=90%.
3. being applied to the method for efficient vanadium extraction by converter blowing, feature based on a kind of carbon-based vanadium slag modifying agent of any of claims 1 or 2
It is, the method are as follows: after vanadium extraction by converter blowing oxygen blast, put into carbon-based vanadium slag modifying agent to converter slag liquid level and blow simultaneously
1~3min of nitrogen gas stirring, or carbon-based vanadium slag modifying agent is blown into converter, converter extracting vanadium stands 1~3min later, then furnace
Half steel and vanadium slag out；The carbon-based vanadium slag modifying agent additional amount is 2.0~5.0kg/t steel.
4. a kind of carbon-based vanadium slag modifying agent according to claim 3 is applied to the method for efficient vanadium extraction by converter blowing, feature exists
In, it is described to put into carbon-based vanadium slag modifying agent and simultaneously nitrogen flushing gas agitating to converter slag liquid level, nitrogen flushing stir flow velocity be 20~
40m3/min。
5. a kind of carbon-based vanadium slag modifying agent according to claim 3 is applied to the method for efficient vanadium extraction by converter blowing, feature exists
In, the carbon-based vanadium slag modifying agent of the blowing, injection method is blown including the use of bottom air brick or bottom spray gun from converter bottom,
Using dedicated oxygen rifle at the top of the converter blowing or using side-blown spray gun from converter side to blowing.
6. the side that a kind of carbon-based vanadium slag modifying agent according to claim 3-5 any one is applied to efficient vanadium extraction by converter blowing
Method, which is characterized in that the carbon-based vanadium slag modifier particle sizes are 1~3mm.
7. the side that a kind of carbon-based vanadium slag modifying agent according to claim 3-5 any one is applied to efficient vanadium extraction by converter blowing
Method, which is characterized in that the carbon-based vanadium slag modifying agent of blowing, injecting velocity are 200~400kg/min.
8. the side that a kind of carbon-based vanadium slag modifying agent according to claim 3-5 any one is applied to efficient vanadium extraction by converter blowing
Method, which is characterized in that FeO content is reduced to 8~20% in the method treated vanadium slag.
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| CN201910249081.1A CN109957635A (en) | 2019-03-29 | 2019-03-29 | A kind of carbon-based vanadium slag modifying agent and its method applied to efficient vanadium extraction by converter blowing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813223A (en) * | 2020-12-30 | 2021-05-18 | 承德建龙特殊钢有限公司 | Method for recovering vanadium slag in vanadium extraction in converter |
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| RU2105073C1 (en) * | 1997-04-25 | 1998-02-20 | Александров Борис Леонидович | Vanadium slag treatment method |
| CN101648728A (en) * | 2008-08-15 | 2010-02-17 | 攀枝花新钢钒股份有限公司 | Method for recovering vanadium pentoxide from molten iron containing vanadium |
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN104195283A (en) * | 2014-09-16 | 2014-12-10 | 攀钢集团西昌钢钒有限公司 | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method |
| CN104480243A (en) * | 2014-12-09 | 2015-04-01 | 河北钢铁股份有限公司承德分公司 | Method for reducing TFe in vanadium extraction slag by use of coke |
-
2019
- 2019-03-29 CN CN201910249081.1A patent/CN109957635A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2105073C1 (en) * | 1997-04-25 | 1998-02-20 | Александров Борис Леонидович | Vanadium slag treatment method |
| CN101648728A (en) * | 2008-08-15 | 2010-02-17 | 攀枝花新钢钒股份有限公司 | Method for recovering vanadium pentoxide from molten iron containing vanadium |
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN104195283A (en) * | 2014-09-16 | 2014-12-10 | 攀钢集团西昌钢钒有限公司 | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method |
| CN104480243A (en) * | 2014-12-09 | 2015-04-01 | 河北钢铁股份有限公司承德分公司 | Method for reducing TFe in vanadium extraction slag by use of coke |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112813223A (en) * | 2020-12-30 | 2021-05-18 | 承德建龙特殊钢有限公司 | Method for recovering vanadium slag in vanadium extraction in converter |
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Application publication date: 20190702 |