CN110453037A - The method of half steel increase heat source - Google Patents
The method of half steel increase heat source Download PDFInfo
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- CN110453037A CN110453037A CN201910847935.6A CN201910847935A CN110453037A CN 110453037 A CN110453037 A CN 110453037A CN 201910847935 A CN201910847935 A CN 201910847935A CN 110453037 A CN110453037 A CN 110453037A
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- Prior art keywords
- half steel
- carburant
- heat source
- steel
- blow
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of methods that half steel increases heat source, belong to iron and steel smelting technology field.The present invention is that the half steel concurrent heating mode in the prior art that solves is at high cost, technical problem of carburetting effect difference, a kind of method that half steel increases heat source is provided, when half steel water meets any one condition below: A, half steel water C < 3.3%；B, 1310 DEG C of half steel molten iron temperature < blow and spray carburant supplement half steel heat source by injection system during half steel out into ladle.The present invention can guarantee the rapid melting that carburant is realized within the temperature range of half steel water, guarantee good utilization rate and carburetting effect, carburant is cheap, and raw material sources are wide.
Description
Technical field
The invention belongs to iron and steel smelting technology fields, and in particular to a kind of method that half steel increases heat source.
Background technique
Pan Gang group etc. is using the blast furnace of Panxi Diqu vanadium titano-magnetite, and the heating elements content such as molten iron silicon, manganese is low, sulphur
Content is high.During vanadium extraction by converter blowing, in order to preferably enter vanadium in vanadium slag by oxidation, transition depth is generally required
It blows and achievees the purpose that deep vanadium extraction；It is done so that result often result in a large amount of oxidations of C content in half steel, result in half in this way
Steel is not able to satisfy smelting condition in rear process pneumatic steelmaking, and steel-making causes endpoint molten steel temperature or ingredient not to be able to satisfy by force
Steel grade requires and brings a series of problems.
The mode of the general additional heat of half steel at present: first is that carburant is added during vanadium extraction by converter blowing, it is therefore an objective to increase
Vanadium in molten iron discharging can effectively be extracted by adding duration of blast to reach, and can guarantee that converter extracting vanadium has qualified temperature in half steel out
Degree and C content；It in addition is exactly that part ferrosilicon is added in half steel process out, to supplement half steel heat source.But above two mode is not
It is ideal half steel concurrent heating mode, the first scheme carburant carburetting effect in converter extracting vanadium is very limited, carbon in carburant
Yield only has 30%, and carburant consumption is very big；Ferrosilicon is added in second scheme, although heat source is preferable, price is high, overall cost
It is higher.It is badly in need of the new process of one kind at present to supplement half steel heat source.
Summary of the invention
The present invention is that the half steel concurrent heating mode in the prior art that solves is at high cost, technical problem of carburetting effect difference, is provided
A kind of method that half steel increases heat source, when half steel water meets any one following condition: A, half steel water C < 3.3%；B, half
1310 DEG C of steel coolant-temperature gage < blows and sprays carburant supplement half steel heat source by injection system during locating half steel into ladle.
Wherein, half steel described above increases in the method for heat source, and the ingredient of the carburant is calculated in mass percent, C:
>=96%, P :≤0.1%, S :≤0.5%, remaining is impurity.
Wherein, half steel described above increases in the method for heat source, granularity≤200 mesh of the carburant, wherein being less than
250 mesh grades are not less than 80%.
Wherein, half steel described above increases in the method for heat source, the straying quatity of the carburant according to following formula into
Row calculates: straying quatity=(1680- half steel molten iron temperature-carbon content * 100) * 10 ÷ half steel charge weights, and unit is kg/t steel.
Wherein, half steel described above increases in the method for heat source, and the injection system, which is divided into leading to blow system and help to blow, is
System, master blow the main injection pipeline of system connection and guarantee that carburant is able to enter ladle by blowing gas；Helping system of blowing to guarantee will
Carburant passes through carrier gas and enters main injection pipeline.
Wherein, half steel described above increases in the method for heat source, it is main blow system gas jetting pressure be 0.4~
0.7Mpa, to guarantee carburant injecting velocity for 40~60kg/min.
Wherein, half steel described above increases in the method for heat source, help blow system gas jetting pressure be 0.2~
0.4Mpa, to guarantee that carburant is able to enter main injection pipeline.
Wherein, half steel described above increases in the method for heat source, and it is nitrogen that master, which blows system and helps the carrier gas for the system of blowing,.
Beneficial effects of the present invention:
The present invention is added carburant temperature raising carburetting using injection system and passes through control according to molten steel C content and/or temperature
Carburant smoothly can be blown into ladle, and control carburant pulvis to guarantee carburant injecting velocity by Gas injection pressure
Burn-off rate realizes the rapid melting of carburant, guarantees good utilization rate and carburetting effect；The carburant valence that this method uses
Lattice are cheap, and raw material sources are wide.
Detailed description of the invention
Fig. 1 is injection system structural schematic diagram of the present invention.
Specific embodiment
Specifically, half steel increases the method for heat source, when half steel water meets any one following condition: A, half steel water C
< 3.3%；B, 1310 DEG C of half steel molten iron temperature < blow and spray carburant into ladle by injection system during half steel out
Supplement half steel heat source.
In the present invention, the ingredient of carburant is calculated in mass percent, C: >=96%, P :≤0.1%, S :≤0.5%, Yu Wei
Impurity；The granularity of carburant≤200 mesh, wherein being not less than 80% less than 250 mesh grades.The straying quatity of carburant is according to following public affairs
Formula is calculated: straying quatity=(1680- half steel molten iron temperature-carbon content * 100) * 10 ÷ half steel charge weights, unit kg/t
Steel；Wherein, when calculating, half steel molten iron temperature and carbon content access value, such as before carburetting, half steel molten iron temperature is 1330 DEG C, carbon
Content is 3.2%, and taking half steel molten iron temperature is 1330, carbon content 3.2.
In the method for the present invention, the batch can that carburant can be stored in carburant powder, which is sent by certain carrier gas to blowing, is
System.In order to which carburant is smoothly blown into ladle, and the burn-off rate of carburant pulvis is controlled, by injection system in the present invention
It is divided into master to blow system and help the system of blowing, master blows the main injection pipeline of system connection and guarantees that carburant is able to enter by blowing gas
Ladle, the main system gas jetting pressure that blows is 0.4~0.7Mpa, to guarantee carburant injecting velocity for 40~60kg/min；It blows
System gas jetting pressure is 0.2~0.4Mpa, enters main injection pipeline to guarantee that carburant passes through carrier gas；Master blows system
With help the carrier gas for the system of blowing to be nitrogen.
After being blown carburant, the substance and gas of penetrating can reduce the temperature of half steel, but chemical heat will increase more (increase
Heating source).
Below by embodiment, invention is further described in detail, but does not therefore limit the scope of the present invention
Among the embodiment described range.
In embodiment, carburant: granularity≤200 mesh, wherein being not less than 80% less than 250 mesh grades；Ingredient (quality percentage
Content): C:98%, P :≤0.1%, S :≤0.5%, remaining is impurity.
Embodiment 1
Go out half steel in 120 tons of converter extracting vanadiums of certain steel mill, half steel ladle charge weight 140t molten iron is blown 230kg carburant
After pulvis, comparison is as shown in table 1 before and after half composition of steel:
Comparison before and after 1 half composition of steel of table and temperature
| Half steel | C/% | Si/% | V/% | Mn/% | Temperature/DEG C |
| Before carburetting | 3.29 | 0.02 | 0.03 | 0.02 | 1330 |
| After carburetting | 3.41 | 0.02 | 0.03 | 0.02 | 1325 |
During converter extracting vanadium goes out half steel, helps and blow system gas jetting pressure for 0.3Mpa, carburant powder can be suitable
Benefit enters main line, and the main system jetting pressure that blows is 0.55Mpa, and realization carburant injecting velocity is 50kg/min, half steel C content
Being blown is 3.3% before carburant, is only blown 200kg carburant, half steel C content is increased by 0.11%, has reached good temperature raising
Carburetting effect.
Embodiment 2
Go out half steel in 120 tons of converter extracting vanadiums of certain steel mill, half steel ladle charge weight 140t molten iron is blown 330kg carburant
After pulvis, comparison is as shown in table 2 before and after half composition of steel:
Comparison before and after 2 half composition of steel of table and temperature
| Half steel | C/% | Si/% | V/% | Mn/% | Temperature/DEG C |
| Before carburetting | 3.2 | 0.02 | 0.03 | 0.02 | 1328 |
| After carburetting | 3.37 | 0.02 | 0.03 | 0.02 | 1325 |
During converter extracting vanadium goes out half steel, helps and blow system gas jetting pressure for 0.35Mpa, carburant powder can be suitable
Benefit enters main line, and the main system jetting pressure that blows is 0.57Mpa, and realization carburant injecting velocity is 55kg/min, half steel C content
Being blown is 3.2% before carburant, is only blown 300kg carburant, half steel C content is increased by 0.17%, has reached good temperature raising
Carburetting effect.
Embodiment 3
Go out half steel in 120 tons of converter extracting vanadiums of certain steel mill, half steel ladle charge weight 140t molten iron is blown 320kg carburant
After pulvis, comparison is as shown in table 3 before and after half composition of steel:
Comparison before and after 3 half composition of steel of table and temperature
| Half steel | C/% | Si/% | V/% | Mn/% | Temperature/DEG C |
| Before carburetting | 3.2 | 0.02 | 0.03 | 0.02 | 1330 |
| After carburetting | 3.34 | 0.02 | 0.03 | 0.02 | 1325 |
During converter extracting vanadium goes out half steel, helps and blow system gas jetting pressure for 0.31Mpa, carburant powder can be suitable
Benefit enters main line, and the main system jetting pressure that blows is 0.52Mpa, and realization carburant injecting velocity is 50kg/min, half steel C content
Being blown is 3.2% before carburant, is only blown 250kg carburant, half steel C content is increased by 0.14%, has reached good temperature raising
Carburetting effect.
Comparative example 1
For the identical half steel condition of embodiment 1, is opened in converter extracting vanadium furnace and blow i.e. addition carburant 400kg, blowing knot
Beam, half steel C content increase by 0.12%, although also having reached temperature raising carburetting effect, carburetting cost the method for the present invention is high by 3~5
Yuan/ton half steel.
Claims (8)
1. the method for half steel increase heat source, it is characterised in that: when half steel water meets any one following condition: A, half steel water
C < 3.3%；B, 1310 DEG C of half steel molten iron temperature < blow and spray carburant into ladle by injection system during half steel out
Supplement half steel heat source.
2. the method that half steel according to claim 1 increases heat source, it is characterised in that: the ingredient of the carburant is with quality
Percentage meter, C: >=96%, P :≤0.1%, S :≤0.5%, remaining is impurity.
3. the method that half steel according to claim 1 increases heat source, it is characterised in that: granularity≤200 of the carburant
Mesh, wherein being not less than 80% less than 250 mesh grades.
4. described in any item half steels increase the method for heat source according to claim 1~3, it is characterised in that: the carburant
Straying quatity is calculated according to following formula: straying quatity=(1680- half steel molten iron temperature-carbon content * 100) * 10 ÷ half steels dress
Enter amount, unit is kg/t steel.
5. the method that half steel according to claim 1 increases heat source, it is characterised in that: the injection system is divided into main blow and is
The system of blowing is united and helps, master blows the main injection pipeline of system connection and guarantees that carburant is able to enter ladle by blowing gas；It helps and blows
Carburant is passed through carrier gas and enters main injection pipeline by system guarantee.
6. the method that half steel according to claim 5 increases heat source, it is characterised in that: master blows system gas jetting pressure and is
0.4~0.7Mpa, to guarantee carburant injecting velocity for 40~60kg/min.
7. the method that half steel according to claim 5 increases heat source, it is characterised in that: help and blow system gas jetting pressure and be
0.2~0.4Mpa, to guarantee that carburant is able to enter main injection pipeline.
8. increasing the method for heat source according to the described in any item half steels of claim 5~7, it is characterised in that: main to blow system and help
The carrier gas for blowing system is nitrogen.
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| CN201910847935.6A CN110453037A (en) | 2019-09-09 | 2019-09-09 | The method of half steel increase heat source |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0311978A1 (en) * | 1987-10-16 | 1989-04-19 | Kortec Ag | Process for delivering heat to molten metal |
| CN102251073A (en) * | 2011-07-08 | 2011-11-23 | 攀钢集团有限公司 | Deoxidizing and carburizing agent for semisteel, and preparation and application methods thereof |
| CN102864282A (en) * | 2012-09-24 | 2013-01-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Recarburization method for semi-steel desulfurization |
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN103160643A (en) * | 2011-12-19 | 2013-06-19 | 攀钢集团西昌钢钒有限公司 | Carburant, preparation method of carburant and smelting method of molten iron containing vanadium |
| CN107058679A (en) * | 2017-04-18 | 2017-08-18 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for stablizing half steel quality |
| CN107723577A (en) * | 2017-09-14 | 2018-02-23 | 首钢京唐钢铁联合有限责任公司 | A kind of semisteel smelting method |
-
2019
- 2019-09-09 CN CN201910847935.6A patent/CN110453037A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0311978A1 (en) * | 1987-10-16 | 1989-04-19 | Kortec Ag | Process for delivering heat to molten metal |
| CN102251073A (en) * | 2011-07-08 | 2011-11-23 | 攀钢集团有限公司 | Deoxidizing and carburizing agent for semisteel, and preparation and application methods thereof |
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN103160643A (en) * | 2011-12-19 | 2013-06-19 | 攀钢集团西昌钢钒有限公司 | Carburant, preparation method of carburant and smelting method of molten iron containing vanadium |
| CN102864282A (en) * | 2012-09-24 | 2013-01-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Recarburization method for semi-steel desulfurization |
| CN107058679A (en) * | 2017-04-18 | 2017-08-18 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for stablizing half steel quality |
| CN107723577A (en) * | 2017-09-14 | 2018-02-23 | 首钢京唐钢铁联合有限责任公司 | A kind of semisteel smelting method |
Non-Patent Citations (1)
| Title |
|---|
| 宋文林: "《电弧炉炼钢》", 28 February 1996, 冶金工业出版社 * |
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Application publication date: 20191115 |
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