CN109609719A - Binary supplies vanadium extraction by converter blowing method - Google Patents
Binary supplies vanadium extraction by converter blowing method Download PDFInfo
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- CN109609719A CN109609719A CN201910093569.XA CN201910093569A CN109609719A CN 109609719 A CN109609719 A CN 109609719A CN 201910093569 A CN201910093569 A CN 201910093569A CN 109609719 A CN109609719 A CN 109609719A
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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
- C21C5/30—Regulating or controlling the blowing
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Abstract
The invention discloses a kind of binary to supply vanadium extraction by converter blowing method, belongs to technical field of ferrous metallurgy.The present invention provides a kind of binary to supply vanadium extraction by converter blowing method, and to be directed to different vanadium-titanium-iron-waters, adjustment gas supply blowing condition improves half steel quality to reduce residual vanadium and carbon scaling loss, improve vanadium oxygenation efficiency.The present invention is blown using two different gases by different proportion, under the conditions of solving different temperatures, different silicone content molten iron, residual vanadium height, vanadium slag V2O5Low problem, residual vanadium significantly reduces after vanadium extraction, and vanadium oxygenation efficiency significantly improves, and half steel quality is improved, and has good popularization and application foreground.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of binary gas supply vanadium extraction by converter blowing method.
Background technique
The features such as V-alloyed steel has intensity high, toughness, wearability, good corrosion resistance, be widely used in machine manufacture, automobile,
The industries such as aerospace, railway, bridge.With the rapid development of our country's economy, demand substantial increase of the market to V-alloyed steel,
The vanadium product yield such as high vanadium ferroalloy, vanadium nitride has been driven to rise.Pan Gang group company is the vanadium product life of the second in the world, largest domestic
Business men accounts for the market share of 90% or more the country.It is current more general that vanadium-bearing hot metal, which extracts the vanadium in molten iron using converter,
Time process for extracting vanadium, have molten iron treating capacity high, the features such as vanadium slag yield is high, and vanadium slag quality is stablized.Pan Gang group company adopts
With vanadium extraction by converter blowing technique, by technological innovation and development in more than 20 years, process for extracting vanadium was domestically leading, vanadium slag V2O5Content is high, miscellaneous
Matter is few.Vanadium extraction by converter blowing etc. is all to be blown using purity oxygen by oxygen rifle, and oxidant is added by vanadium oxidation in molten iron and enters clinker shape
At vanadium slag.When molten iron temperature is high, heating element is high, need to be added a large amount of ferrous material and oxidant control process temperature,
Achieve the effect that reduce residual vanadium, while also bringing a large amount of ferrous materials of consumption, V in vanadium slag2O5Problem low, carbon scaling loss is big；When containing
It when iron material resource deficiency, heats up without effective means and technical controlling process, residual vanadium is caused to increase, vanadium oxygenation efficiency drop
Low, vanadium recovery reduces.
201810084272.2 a kind of composite air supply vanadium extraction by converter blowing method is disclosed, this method comprises: vanadium-bearing hot metal enters to turn
After furnace, blown by the mixed gas that oxygen rifle blows and sprays oxygen and nitrogen, since blowing to after blowing 0.5~
High rifle position is used in the 1.0min period, since blowing before rear 0.5~1.0min to finishing blowing in 1~1.5min period
Position is robbed using low, 1~1.5min uses high rifle position to finishing blowing before finishing blowing, and the control of mixed gas air supply intensity exists
2.5~3.5m3/ (mint vanadium-bearing hot metal)；Vanadium-raising cooling agent adds in the 2min after blowing starts.201810338522.0
A kind of converter segmented gas supply extraction vanadium method is disclosed, this method comprises: blowing and spraying gas by oxygen rifle after vanadium-bearing hot metal enters converter
Blow, oxygen lance position is invariable when blowing, converting process is divided into three phases, since blowing to blowing 2.5~
3.0min is blown using oxygen, then continues 2.0~3.0min of blowing using nitrogen, finally continues to blow using oxygen
2.0~2.5min.
Therefore need it is a kind of do not increase oxidant, ferrous material dosage can reduce residual vanadium, improve turning for vanadium oxygenation efficiency
Furnace vanadium extraction technology.
Summary of the invention
The technical problem to be solved by the present invention is to how be directed to different vanadium-titanium-iron-waters, adjustment gas supply blowing condition, to drop
Low residual vanadium and carbon scaling loss improve vanadium oxygenation efficiency, improve half steel quality.
The technical proposal adopted by the invention to solve the above technical problems is that providing a kind of binary gas supply vanadium extraction by converter blowing side
Method, this method determine gas supply blowing condition according to the silicone content and temperature of vanadium-bearing hot metal, specifically:
As vanadium-titanium-iron-water Si < 0.15wt%, 1280~1300 DEG C of temperature, after vanadium-bearing hot metal enters converter, blown by oxygen rifle
Jet body blows, and in 60~120s period before finishing blowing since blowing, blows and sprays O2；60 before finishing blowing~
In 120s to finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 20%~40%；Vanadium-raising cooling agent is being blown
It refines and is added in the 2min after starting；
As vanadium-titanium-iron-water Si >=0.15wt%, 1280~1300 DEG C of temperature, after vanadium-bearing hot metal enters converter, blown by oxygen rifle
Jet body blows, and blows and sprays O in 60~120s period to after blowing since blowing2；60 after since blowing~
Before 120s to finishing blowing in 60~120s period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 10%~30%；From blowing
Refining terminates to blow and spray O in preceding 60~120s to finishing blowing period2And N2Mixed gas, N2Consumption ratio 20%~40%；It mentions
Vanadium coolant adds in the 2min after blowing starts；
When 1300 DEG C of vanadium-titanium-iron-water temperature >, after vanadium-bearing hot metal enters converter, gas is blowed and sprayed by oxygen rifle and is blown, from
Before blowing starts to finishing blowing in 60~120s period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 20%~30%；
Before finishing blowing in 60~120s to finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 30%~
40%；Vanadium-raising cooling agent adds in the 2min after blowing starts.
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, as vanadium-titanium-iron-water Si < 0.15wt%, temperature 1280
At~1300 DEG C, in 60~120s period before finishing blowing since blowing, oxygen flow is 16500~18500m3/h；
Before finishing blowing in 60~120s to finishing blowing period, oxygen flow is 13200~14500m3/ h, nitrogen flow are
4500~8500m3/h。
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, as vanadium-titanium-iron-water Si >=0.15wt%, temperature 1280
At~1300 DEG C, since blowing to after blowing in 60~120s period, oxygen flow is 16500~18500m3/h；
After since blowing before 60~120s to finishing blowing in 60~120s period, oxygen flow is 14000~15500m3/ h,
Nitrogen flow is 1800~6500m3/h；Before finishing blowing in 60~120s to finishing blowing period, oxygen flow is
13200~14500m3/ h, nitrogen flow are 4500~8500m3/h。
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, when 1300 DEG C of vanadium-titanium-iron-water temperature >, from blowing
Before starting to finishing blowing in 60~120s period, oxygen flow is 13600~14500m3/ h, nitrogen flow be 4500~
7500m3/h；Before finishing blowing in 60~120s to finishing blowing period, oxygen flow is 13200~14500m3/ h, nitrogen
Throughput is 5500~9000m3/h。
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, the furnace entering volume of vanadium-bearing hot metal is 130~150t.
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, whole duration of blast is 5.0min~7.5min.
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, the dosage of the vanadium-raising cooling agent is 25~40kg/
T vanadium-bearing hot metal.
Wherein, in binary described above gas supply vanadium extraction by converter blowing method, 1360 DEG C~1410 DEG C of blowing end point temperature.
The beneficial effects of the present invention are:
The present invention is mixed into oxygen rifle by pipeline by different proportion by using two different gases and blows, solution
Under the conditions of never synthermal, different silicone content molten iron, residual vanadium height, vanadium slag V2O5Low problem；Do not increasing other any coolants
Under the premise of, using the oxygen rifle blowing vanadium extraction of binary air supply method, residual vanadium, which significantly reduces, after vanadium extraction (is reduced to 10% left side for converter
It is right), vanadium oxygenation efficiency is significantly improved and (is improved to 90% or more), and half steel quality is improved；The method of the present invention can be directed to different items
Part molten iron carries out corresponding accurate processing, and actual operation is strong, has good popularization and application foreground.
Specific embodiment
Carbon scaling loss, inventor are reduced for the vanadium-bearing hot metal of different silicone contents and temperature to improve vanadium oxygenation efficiency as far as possible
Accurate control has been carried out to carbon vanadium conversion process, due to inert gas (nitrogen) and oxygen mix, oxygen content has been reduced, can slow down
Heating rate after heating element is reacted with oxygen in molten iron extends the vanadium inversion temperature time, therefore inventor passes through to blowing gas
The Composition Control of body extends the time of its temperature, react vanadium in molten iron can more sufficiently, specifically:
As vanadium-titanium-iron-water Si < 0.15wt%, 1280~1300 DEG C of temperature, to avoid outlet temperature inadequate, carbon scaling loss
Height after vanadium-bearing hot metal enters converter, blows and sprays gas by oxygen rifle and blows, to before finishing blowing when 60~120s since blowing
Between in section, blow and spray O2；Before finishing blowing in 60~120s to finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption
Ratio 20%~40%；Vanadium-raising cooling agent adds in the 2min after blowing starts；
As vanadium-titanium-iron-water Si >=0.15wt%, 1280~1300 DEG C of temperature, to avoid carbon scaling loss high, vanadium-bearing hot metal enters to turn
After furnace, gas is blowed and sprayed by oxygen rifle and is blown, blows and sprays O in 60~120s period to after blowing since blowing2；
O is blowed and sprayed in 60~120s period before 60~120s to finishing blowing after since blowing2And N2Mixed gas, N2Consumption ratio
10%~30%；Before finishing blowing in 60~120s to finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio
Example 20%~40%；Vanadium-raising cooling agent adds in the 2min after blowing starts；
It is too fast to avoid converting process temperature from rising after vanadium-bearing hot metal enters converter when 1300 DEG C of vanadium-titanium-iron-water temperature >,
Residual vanadium is higher, blows and sprays gas by oxygen rifle and blows, and in 60~120s period before finishing blowing since blowing, blows and sprays
O2And N2Mixed gas, N2Consumption ratio 20%~30%；Before finishing blowing in 60~120s to finishing blowing period, blow
Spray O2And N2Mixed gas, N2Consumption ratio 30%~40%；Vanadium-raising cooling agent adds in the 2min after blowing starts.
To control each gas usage convenient for more acurrate, as vanadium-titanium-iron-water Si < 0.15wt%, 1280~1300 DEG C of temperature,
To in 60~120s period before finishing blowing since blowing, oxygen flow is 16500~18500m3/h；From finishing blowing
In preceding 60~120s to finishing blowing period, oxygen flow is 13200~14500m3/ h, nitrogen flow be 4500~
8500m3/h。
As vanadium-titanium-iron-water Si >=0.15wt%, 1280~1300 DEG C of temperature, since blowing to after blowing 60~
In the 120s period, oxygen flow is 16500~18500m3/h；After since blowing 60 before 60~120s to finishing blowing~
In the 120s period, oxygen flow is 14000~15500m3/ h, nitrogen flow are 1800~6500m3/h；Before finishing blowing
In 60~120s to finishing blowing period, oxygen flow is 13200~14500m3/ h, nitrogen flow are 4500~8500m3/
h。
When 1300 DEG C of vanadium-titanium-iron-water temperature >, in 60~120s period before finishing blowing since blowing, oxygen
Flow is 13600~14500m3/ h, nitrogen flow are 4500~7500m3/h；60~120s is to finishing blowing before finishing blowing
In period, oxygen flow is 13200~14500m3/ h, nitrogen flow are 5500~9000m3/h。
In binary gas supply vanadium extraction by converter blowing method provided by the invention, the furnace entering volume of vanadium-bearing hot metal is 130~150t.
In binary gas supply vanadium extraction by converter blowing method of the present invention, whole duration of blast is 5.0min~7.5min.
The method of the present invention does not increase additional increase vanadium-raising cooling agent, and dosage is generally 25~40kg/t vanadium-bearing hot metal.
The method of the present invention avoids the inadequate situation of outlet temperature by the accurate control to converting process, while will not
Generation outlet temperature is excessively high, and vanadium back reaction enters in half steel in clinker, causes half steel vanadium high, vanadium oxygenation efficiency reduces, to make to blow
Refining outlet temperature control is 1360 DEG C~1410 DEG C.
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.
Embodiment 1
1303 DEG C of vanadium-bearing hot metal silicon 0.25wt%, molten iron temperature pass through oxygen rifle after 140t vanadium-bearing hot metal enters 120 tons of converters
It blows and sprays gas to blow, first blows and sprays O2And N2Mixed gas, N2Consumption ratio 20% controls oxygen flow 15000m3/ h, nitrogen
Throughput 4500m3/h；It blows after 4.5min, adjusts oxygen flow 13500m3/ h, nitrogen flow 6500m3/ h, at this time O2And N2It is mixed
Close gas, N2Consumption ratio 30%, blow 1min；Whole duration of blast 5.5min；Vanadium-raising cooling agent unit consumption control 30kg/t contains
Vanadium-containing molten iron, blowing start to be added portionwise in 2min；Half steel aim carbon 3.76%, 1385 DEG C of temperature, residual vanadium 0.029%, carbon scaling loss
Rate 11.7%, vanadium oxygenation efficiency 91.3%.
Embodiment 2
1296 DEG C of vanadium-bearing hot metal silicon 0.13wt%, molten iron temperature pass through oxygen rifle after 140t vanadium-bearing hot metal enters 120 tons of converters
Gas is blowed and sprayed to blow.First blow and spray pure O2Gas controls oxygen flow 17500m3/h；It blows after 4.0min, adjusts O2And N2
Mixed gas controls oxygen flow 14500m3/ h, nitrogen flow 5200m3/ h, N2Consumption ratio 22%；Vanadium-raising cooling agent unit consumption
26kg/t vanadium-bearing hot metal is controlled, blowing starts to be added portionwise in 2min；Half steel aim carbon 3.82%, 1382 DEG C of temperature, residual vanadium
0.026%, carbon burn out rate 10.8%, vanadium oxygenation efficiency 91.5%.
Embodiment 3
1290 DEG C of vanadium-bearing hot metal silicon 0.18wt%, molten iron temperature pass through oxygen rifle after 140t vanadium-bearing hot metal enters 120 tons of converters
It blows and sprays gas to blow, first blows and sprays O2Gas controls oxygen flow 17300m3/h；It blows after 2.0min, adjusts O2And N2It is mixed
Gas is closed, oxygen flow 14500m is controlled3/ h, nitrogen flow 4300m3/ h, N2Consumption ratio 18%, blow 2.0min；Finally
1.5min controls oxygen flow 13800m3/ h, nitrogen flow 5600m3/ h, N2Consumption ratio 25%；Vanadium-raising cooling agent unit consumption control
28kg/t vanadium-bearing hot metal processed, blowing start to be added portionwise in 2min；Half steel aim carbon 3.75%, 1380 DEG C of temperature, residual vanadium
0.028%, carbon burn out rate 11.1%, vanadium oxygenation efficiency 91.2%.
Comparative example 1
1303 DEG C of vanadium-bearing hot metal silicon 0.25%, molten iron temperature after 140t vanadium-bearing hot metal enters converter, blow and spray pure O by oxygen rifle2
It blows, oxygen flow 18200m3/ h, coolant unit consumption control 28kg/t vanadium-bearing hot metal, whole duration of blast 4.5 minutes,
Half steel carbon 3.63%, 1425 DEG C of temperature, residual vanadium 0.062%, carbon burn out rate 17.5%, vanadium oxygenation efficiency 79.6%.
Comparative example 2
1300 DEG C of vanadium-bearing hot metal silicon 0.10%, molten iron temperature, after 140t vanadium-bearing hot metal enters 120 tons of converters, using pure O2Into
Row blowing, oxygen flow 17600m3/ h, coolant unit consumption control 26kg/t vanadium-bearing hot metal, whole duration of blast 5.5 minutes, half
Steel carbon 3.54%, 1405 DEG C of temperature, residual vanadium 0.035%, carbon burn out rate 16.8%, vanadium oxygenation efficiency 87.5%.
Comparative example 3
1300 DEG C of vanadium-bearing hot metal silicon 0.18%, molten iron temperature, after 142t vanadium-bearing hot metal enters 120 tons of converters, using pure O2Into
Row blowing, oxygen flow 17700m3/ h, coolant unit consumption control 28kg/t vanadium-bearing hot metal, whole duration of blast 5.3 minutes, half
Steel carbon 3.57%, 1396 DEG C of temperature, residual vanadium 0.038%, carbon burn out rate 17.2%, vanadium oxygenation efficiency 88.6%.
Claims (8)
1. binary supplies vanadium extraction by converter blowing method, it is characterised in that: according to the silicone content and temperature of vanadium-bearing hot metal, determine gas supply blowing
Condition, specifically:
As vanadium-titanium-iron-water Si < 0.15wt%, 1280~1300 DEG C of temperature, after vanadium-bearing hot metal enters converter, gas is blowed and sprayed by oxygen rifle
Body blows, and in 60~120s period before finishing blowing since blowing, blows and sprays O2；60~120s before finishing blowing
Into the finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 20%~40%；Vanadium-raising cooling agent is opened in blowing
It is added in 2min after beginning；
As vanadium-titanium-iron-water Si >=0.15wt%, 1280~1300 DEG C of temperature, after vanadium-bearing hot metal enters converter, gas is blowed and sprayed by oxygen rifle
Body blows, and blows and sprays O in 60~120s period to after blowing since blowing2；60~120s after since blowing
Before to finishing blowing in 60~120s period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 10%~30%；It is tied from blowing
Before beam in 60~120s to finishing blowing period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 20%~40%；Vanadium extraction is cold
But agent adds in the 2min after blowing starts；
When 1300 DEG C of vanadium-titanium-iron-water temperature >, after vanadium-bearing hot metal enters converter, gas is blowed and sprayed by oxygen rifle and is blown, from blowing
Before starting to finishing blowing in 60~120s period, O is blowed and sprayed2And N2Mixed gas, N2Consumption ratio 20%~30%；From blowing
Refining terminates to blow and spray O in preceding 60~120s to finishing blowing period2And N2Mixed gas, N2Consumption ratio 30%~40%；It mentions
Vanadium coolant adds in the 2min after blowing starts.
2. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: as vanadium-titanium-iron-water Si <
When 0.15wt%, 1280~1300 DEG C of temperature, in 60~120s period before finishing blowing since blowing, oxygen flow is
16500~18500m3/h；Before finishing blowing in 60~120s to finishing blowing period, oxygen flow be 13200~
14500m3/ h, nitrogen flow are 4500~8500m3/h。
3. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: when vanadium-titanium-iron-water Si >=
When 0.15wt%, 1280~1300 DEG C of temperature, since blowing to after blowing in 60~120s period, oxygen flow is
16500~18500m3/h；After since blowing before 60~120s to finishing blowing in 60~120s period, oxygen flow is
14000~15500m3/ h, nitrogen flow are 1800~6500m3/h；60~120s is to the finishing blowing period before finishing blowing
Interior, oxygen flow is 13200~14500m3/ h, nitrogen flow are 4500~8500m3/h。
4. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: as vanadium-titanium-iron-water temperature > 1300
DEG C when, in 60~120s period before finishing blowing since blowing, oxygen flow is 13600~14500m3/ h, nitrogen stream
Amount is 4500~7500m3/h；Before finishing blowing in 60~120s to finishing blowing period, oxygen flow be 13200~
14500m3/ h, nitrogen flow are 5500~9000m3/h。
5. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: the furnace entering volume of vanadium-bearing hot metal is
130~150t.
6. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: whole duration of blast is 5.0min
~7.5min.
7. binary according to claim 1 supplies vanadium extraction by converter blowing method, it is characterised in that: the dosage of the vanadium-raising cooling agent
For 25~40kg/t vanadium-bearing hot metal.
8. described in any item binary supply vanadium extraction by converter blowing method according to claim 1~7, it is characterised in that: blowing end point temperature
1360 DEG C~1410 DEG C of degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910093569.XA CN109609719B (en) | 2019-01-30 | 2019-01-30 | Method for extracting vanadium by binary gas supply converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093569.XA CN109609719B (en) | 2019-01-30 | 2019-01-30 | Method for extracting vanadium by binary gas supply converter |
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| CN109609719B CN109609719B (en) | 2020-11-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103525972A (en) * | 2013-10-23 | 2014-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Converter vanadium-extracting method of molten iron containing vanadium |
| CN106244763A (en) * | 2016-09-07 | 2016-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-bearing hot metal is the method for Simultaneous Oxidation separation of phosphorus vanadium in converter |
| CN108179245A (en) * | 2018-01-29 | 2018-06-19 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of composite air supply vanadium extraction by converter blowing method |
-
2019
- 2019-01-30 CN CN201910093569.XA patent/CN109609719B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103525972A (en) * | 2013-10-23 | 2014-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Converter vanadium-extracting method of molten iron containing vanadium |
| CN106244763A (en) * | 2016-09-07 | 2016-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-bearing hot metal is the method for Simultaneous Oxidation separation of phosphorus vanadium in converter |
| CN108179245A (en) * | 2018-01-29 | 2018-06-19 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of composite air supply vanadium extraction by converter blowing method |
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