CN108034788A - A kind of method for handling desulfurization slag iron - Google Patents
A kind of method for handling desulfurization slag iron Download PDFInfo
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- CN108034788A CN108034788A CN201711285601.1A CN201711285601A CN108034788A CN 108034788 A CN108034788 A CN 108034788A CN 201711285601 A CN201711285601 A CN 201711285601A CN 108034788 A CN108034788 A CN 108034788A
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- desulfurization slag
- slag iron
- desulfurization
- iron
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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
- C21C5/34—Blowing through the bath
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides it is a kind of handle desulfurization slag iron method, the described method includes：Desulfurization slag iron is added in the molten iron of converter blowing makes its fusing, and the monolithic weight of the desulfurization slag iron is≤1500Kg, thickness≤300mm, length≤1000mm；Converter oxygen supply intensity is 1.9 3.5Nm3/ min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity is 0.077~0.124Nm3/min/t；After desulfurization slag iron the end of melting, half steel tapping is carried out.The present invention can stablize consumption desulfurization slag iron, and treating capacity is big, and in the case where half steel sulfur content is higher can normal desulfurization, while half steel water that desulfurization terminates can normally smelt variety steel, features simple and practical process.
Description
Technical field
The invention belongs to steelmaking technical field, more particularly to a kind of method for handling desulfurization slag iron.
Background technology
China is steel big producer, year output of steel have reached 700,000,000 tons, account for more than the 50% of steel mill of world amount.Total institute
Known, steel and iron industry is major power consumer, therefore how energy-saving and emission-reduction are one of important process of iron and steel enterprise all the time.With
Higher and higher to steel product quality requirement in the world, desulfurizing iron project is in full flourish in each steel mill, therefore produces more next
More desulfurization scums, this part scum has very high iron content, but clinker amount containing S therein is again very high at the same time, usually
Reach more than 2%, molten steel somewhat infiltrates a part of scum, then seriously pollutes molten steel.How to recycle desulfurization scum is one
Need the problem urgently solved.
Some Enterprises, which employ, carries out desulfurization slag iron the broken method of essence, i.e., the desulfurization slag iron of small grain size is added to iron
Bao Zhong, is melted desulfurization slag iron using the stirring power of blast furnace casting process, but such a method consumption desulfurization slag iron is few, often wraps
Molten iron is only capable of with addition of 1t or so, and is mainly used in implementing the enterprise of " tank is on earth " technique, and limitation is big.
The content of the invention
For the above problem in background technology, it is a primary object of the present invention to provide a kind of side for handling desulfurization slag iron
Method, can stablize consumption desulfurization slag iron, treating capacity is big, and features simple and practical process, and applicability is wide.
In order to achieve the above object, the present invention adopts the following technical scheme that：A kind of method for handling desulfurization slag iron, the side
Method includes：
Desulfurization slag iron is added in the molten iron of converter blowing makes its fusing, the monolithic weight of the desulfurization slag iron for≤
1500Kg, thickness≤300mm, length≤1000mm；
Converter oxygen supply intensity is 1.9-3.5Nm3/ min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity is 0.077
~0.124Nm3/min/t；
After desulfurization slag iron the end of melting, half steel tapping is carried out.
As further preferably, the desulfurization slag iron thickness is 10mm-300mm, length 10mm-1000mm.
As further preferably, the oxygen supply intensity that the converter opens when blowing is 3-3.5Nm3/ min/t, confirms that point catches fire
Afterwards, the oxygen supply intensity is adjusted to 1.9-2.0Nm3/min/t。
As it is further preferably, when the desulfurization slag iron weight added in converter is 35-45t, molten iron is 185-195t,
Converter charge weight is controlled in 225-235t.
As further preferably, oxygen supply time is 8~10min.
As it is further preferably, further include：Carbon content during the desulfurization slag iron the end of melting for 2.80%≤C≤
3.20%, the temperature control of the half steel tapping is 1460 DEG C≤T≤1520 DEG C.
As it is further preferably, further include：It is white to start addition 800~1500kg granules i.e. in molten iron in half steel tapping
Ash；Granule lime adds ferrosilicon again after finishing so that Si contents are 0.23~0.34% in molten iron.
Preferably the granule lime is added in converter tapping with steel stream as further, to tap to 1/5-2/5
Before add.
As it is further preferably, further include：Control online BOTTOM ARGON BLOWING in tapping process, flow control for 500~
800Nl/min；Bottom blowing strong mixing 3-5min is used after having gone out steel, bottom blowing flow is 800-1500NL/min.
As it is further preferably, further include：By obtained half steel desulfurizing iron of tapping, the desulfurization cycle is 60~70min；
Target sulphur content is 0.001-0.005%.
As further preferably, the desulfurization includes：Desulfurizing agent pulvis is placed in injection tank, by carrier gas by injection tank
In desulfurizing agent pulvis be delivered to spray gun, then its desulfurizing agent is blown into half steel water by spray gun；1-2min before the injection
Carrier gas flux be 100-120Nm3/ h, desulfurizing agent pulvis speed are 7~10kg/min；After injection tank pressure≤0.65Mpa,
Desulfurizing agent pulvis speed is adjusted to 10~13kg/min.
The beneficial effects of the invention are as follows：The present invention replaces steel scrap using desulfurization slag iron, will using molten iron+blowing in converter
It is melted, and tapping steel (half steel) is carried out after the end of melting；The monolithic weight (abbreviation substance) of the desulfurization slag iron for≤
1500Kg, thickness≤300mm, length≤1000mm, the i.e. present invention are controlled desulfurization slag iron weight and size so that described
Desulfurization slag iron being capable of rapid melting in converter molten iron；The present invention then controls converter to open, and to blow oxygen supply intensity be 1.9-3.5Nm3/
Min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity is 0.077~0.124Nm3/min/t；I.e. to converter iron process
Oxygen supply intensity and bottom blowing intensity Comprehensive Control, it is ensured that all melted before the tapping of desulfurization slag iron.The method of the present invention can be stablized and disappear
Desulfurization slag iron, features simple and practical process are consumed, and can be used in conventional converter steelmaking process, is applicable in wide.
Embodiment
The present invention by providing a kind of method for handling desulfurization slag iron, solve how effective recycling desulfurization slag iron
Problem.
In order to solve drawbacks described above, the main thought of the embodiment of the present invention is：
The method that the embodiment of the present invention handles desulfurization slag iron, the described method includes：
Desulfurization slag iron is added to blowing in the molten iron of converter makes its fusing, to desulfurization slag iron weight and size Control, makes
The desulfurization slag iron can rapid melting, the substance of desulfurization slag iron described in the embodiment of the present invention is≤1500Kg, thickness≤
300mm, length≤1000mm；The substance is the gross weight of one piece of desulfurization slag iron, can be controlled by the method screened or crushed
The weight of desulfurization slag iron processed, it is theoretically the smaller the better as long as the substance iron-holder of the desulfurization slag iron reaches requirement, it is so de-
Sulphur slag iron is easier to melt in converter, and the present embodiment can be controlled in application according to lower limit ＞ 10mm, meanwhile, desulfurization
The substance of slag iron can ＜ 1Kg.
Then in blowing, to converter iron process oxygen supply intensity and bottom blowing intensity Comprehensive Control, in order to ensure an igneous
Work(, takes to open and blows the igniting of big oxygen flow, after light a fire successfully, turn small flow, and duration of blast control (such as 8- within a certain period of time
10min) ensure that desulfurization slag iron all melts；Big bottom blowing intensity is taken, strengthens stirring and improves desulfurization slag iron burn-off rate.This hair
Bright embodiment converter oxygen supply intensity is 1.9-3.5Nm3/ min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity is 0.077
~0.124Nm3/min/t；
After desulfurization slag iron the end of melting, half steel tapping is carried out.
Above and other purpose, feature and advantage in order to allow the present invention can become apparent, and number cited below particularly is implemented
Example, to illustrate the method for processing desulfurization slag iron of the present invention.
Embodiment 1
The method that the embodiment of the present invention 1 handles desulfurization slag iron, the described method includes：Desulfurization slag iron is added to the iron of converter
Blowing in water makes its fusing, after desulfurization slag iron the end of melting, carries out half steel tapping.
In order to ensure desulfurization slag iron melts within the limited time, to desulfurization slag iron Weight control so that the present invention is implemented
The substance of the example desulfurization slag iron is 1000-1500Kg；
Desulfurization slag iron size is required in order to ensure desulfurization slag iron melts within the limited time so that the present invention is real
The specification for applying the example desulfurization slag iron meets：Thickness is 100-300mm, length 500-1000mm；
Converter opens that to blow oxygen supply intensity be 3.41Nm in the present embodiment 13/ min/t, confirm point catch fire after, oxygen supply intensity according to
1.94Nm3/ min/t is controlled, total oxygen-supplying amount 3000Nm3；Bottom blowing intensity 0.077Nm3/min/t。
The converter charge weight of the embodiment of the present invention is 230t, and iron water amount 190t, considers thermal balance and maximum
With eating desulfurization slag iron, desulfurization slag iron is controlled in 40t/ stoves with the amount of eating, iron water amount can guarantee that converter iron and follow-up half steel
It can meet to continue to smelt variety steel requirement after desulfurization；Iron water amount=charge weight-desulfurization slag iron-molten iron foreskin in theory
Weight.
Confirmed by practical application, the 40t desulfurization slag irons in converter all melt in 8min.
Embodiment 2
The method that the embodiment of the present invention 2 handles desulfurization slag iron, the described method includes：Desulfurization slag iron is added to the iron of converter
Blowing in water makes its fusing, after desulfurization slag iron the end of melting, carries out half steel tapping.Slag charge is added in tapping process, is carried out pre- de-
Sulphur and to compound desulfurization slag making, and carry out half steel and operated with silicon, then by half steel water into the processing of desulfurization station, desulfurization process knot
Converter smelting+steel scrap is reloaded after beam.
The substance of desulfurization slag iron described in the embodiment of the present invention is 100-500Kg；Thickness is 50-100mm, length 100-
500mm；
Converter opens that to blow oxygen supply intensity be 3.0Nm in the present embodiment 23/ min/t, confirm point catch fire after, oxygen supply intensity according to
1.9Nm3/ min/t is controlled, total oxygen-supplying amount 3500Nm3；Bottom blowing intensity 0.124Nm3/min/t。
When the desulfurization slag iron weight that embodiment 2 adds in converter is 45t, molten iron is 195t, the control of converter charge weight exists
235t。
Confirmed by practical application, the 45t desulfurization slag irons in converter all melt in 10min.
Embodiment 2 is controlled tapping carbon content and temperature to ensure follow-up compound desulfurization effect：Work as desulfurization slag
After iron the end of melting, when carrying out half steel tapping, for half steel tapping carbon content by 2.80% control, the control generally can be according to sublance
Model calculates and daily actual production data, by controlling half steel to supply oxygen total amount and oxygen supply time, to reach control desulfurization slag iron
Fusing and the purpose of half steel tapping carbon content；At the same time in order to ensure follow-up compound desulfurization effect, tapping process charging and this are considered
Body tapping process temperature drop, half steel tapping temperature is controlled at 1460 DEG C.
In addition, consider with eat desulfurization slag iron half steel molten steel sulfur content it is higher, in order to alleviate the pressure of compound desulfurization,
Embodiment 2 operates after taking stove with addition of granule lime and common ferrosilicon.Slag charge is added in tapping process, carries out pre- desulfurization and to multiple
Desulfurization slag making is closed, i.e.,：Tapping start i.e. add 1500kg granule limes, mixing steel stream together add, to tap 2/5 before plus
It is complete；Variety steel thermal balance is smelted after in order to ensure half steel desulfurization, half steel is carried out and is operated with silicon, i.e., granule lime adds after finishing
Common ferrosilicon 1000kg (reference target Si：0.34%).
Meanwhile in order to ensure the slag charge and alloy melting of addition, online BOTTOM ARGON BLOWING is controlled in tapping process, flow is pressed
800Nl/min is controlled；Bottom blowing strong mixing 3min is used after having gone out steel, bottom blowing flow is 1000NL/min.
Embodiment 2 is compound de- since half steel molten steel sulfur content is high also by obtained half steel water progress desulfurization process of tapping
Sulphur needs enough cycles, and embodiment 2 optimizes injection parameter：The desulfurization cycle of embodiment 2 is 60min, the desulfurization bag
Include：Desulfurizing agent pulvis is placed in injection tank, and the desulfurizing agent pulvis in injection tank is delivered to spray gun by carrier gas, then will by spray gun
Its desulfurizing agent is blown into half steel water；It is blown carrier gas flux 100Nm early period3/ h, pulvis 7~10kg/min of speed, injection tank
After pressure≤0.65Mpa, pulvis speed is adjusted to 10~13kg/min；As tank is pressed with rise trend, adjustment load during injection
110~120Nm of throughput3/ h, as tank pressure continues to raise, reduces pulvis speed to 7~10kg/min；The voltage-controlled system of the whole tank of injection
≤0.68Mpa；
Confirmed by practical application, 2 method of the embodiment of the present invention, which is stablized, consumes 45t desulfurization slag irons, while desulfurization terminates
Half steel water can normally smelt variety steel, desulfuration efficiency is high, and final sulfur content is 0.005%.
Embodiment 3
The method that the embodiment of the present invention 3 handles desulfurization slag iron is similar to Example 2.
The substance of desulfurization slag iron described in the embodiment of the present invention 3 is 500-1000Kg；Thickness is 100-200mm, and length is
500-800mm；
Converter opens that to blow oxygen supply intensity be 3.5Nm in the present embodiment 33/ min/t, confirm point catch fire after, oxygen supply intensity according to
2.0Nm3/ min/t is controlled, total oxygen-supplying amount 3200Nm3；Bottom blowing intensity 0.102Nm3/min/t。
When the desulfurization slag iron weight that embodiment 3 adds in converter is 35t, molten iron is 185t, the control of converter charge weight exists
225t。
Confirmed by practical application, the 35t desulfurization slag irons in converter all melt in 9min.
In order to ensure follow-up compound desulfurization effect, after desulfurization slag iron the end of melting, when carrying out half steel tapping, half steel tapping
Carbon content is by 3.20% control；Tapping process charging and tapping process temperature drop itself are considered at the same time, and half steel tapping temperature is controlled
At 1520 DEG C.
In addition, consider with eat desulfurization slag iron half steel molten steel sulfur content it is higher, in order to alleviate the pressure of compound desulfurization,
Embodiment 3 adds slag charge in tapping process, carries out pre- desulfurization and to compound desulfurization slag making, i.e.,：Tapping starts to add 1000kg
Granule lime, mixing steel stream together add, to tap 1/5 before add；Variety steel is smelted after in order to ensure half steel desulfurization
Thermal balance, carries out half steel and is operated with silicon, i.e., granule lime adds common ferrosilicon 800kg (reference target Si after finishing：0.30%).
Meanwhile in order to ensure the slag charge and alloy melting of addition, online BOTTOM ARGON BLOWING is controlled in tapping process, flow is pressed
600Nl/min is controlled；Bottom blowing strong mixing 5min is used after having gone out steel, bottom blowing flow is 1500NL/min.
For embodiment 3 also by obtained half steel water progress desulfurization process of tapping, the desulfurization cycle is 70min.The desulfurization bag
Include：Desulfurizing agent pulvis is placed in injection tank, and the desulfurizing agent pulvis in injection tank is delivered to spray gun by carrier gas, then will by spray gun
Its desulfurizing agent is blown into half steel water；Injection early period (the preceding 1-2min for starting injection) carrier gas flux 100Nm3/ h, pulvis speed
Spend for 10kg/min, after injection tank pressure≤0.65Mpa, pulvis speed is adjusted to 13kg/min；As tank is pressed with during injection
Rise trend, adjustment carrier gas flux 120Nm3/ h, as tank pressure continues to raise, reduces pulvis speed to 10kg/min；Injection is whole
Voltage-controlled system≤the 0.68Mpa of tank.
In addition, embodiment 3 carries out specification in desulfurization process to skimming, i.e.,：When skimming, it then follows early to skim, scratch clean slag
Principle, it is partially dilute for scum, the scum assembled is not easy, takes the slag agent of addition collection to skim at the same time using blowing slag-removing auxiliary.Desulfurization
Half steel water terminated can normally smelt variety steel.
In conclusion the embodiment of the present invention 3 passes through to desulfurization slag iron weight and size Control；Converter iron charge weight control
System；Converter iron process oxygen supply intensity and bottom blowing intensity Comprehensive Control；Change iron and terminate carbon and temperature control；Tapping charging and ladle
Bottom blowing controls；Compound desulphurization control.In the case where rhythm of production allows, consumption 35t desulfurization slag irons can be stablized, while desulfurization terminates
Half steel water can normally smelt variety steel, in the case where half steel sulfur content is higher can normal desulfurization, by half steel sulfur content
Control as 0.004%.This method practical application effect is good.
Embodiment 4
The method that the embodiment of the present invention 4 handles desulfurization slag iron is similar to Example 3.
The substance of desulfurization slag iron described in the embodiment of the present invention 4 is 1-100Kg；Thickness is 10-50mm, length 10-
100mm；
Converter opens that to blow oxygen supply intensity be 3.0Nm in the present embodiment 43/ min/t, confirm point catch fire after, oxygen supply intensity according to
1.9Nm3/ min/t is controlled, total oxygen-supplying amount 3000Nm3；Bottom blowing intensity 0.078Nm3/min/t。
When the desulfurization slag iron weight that embodiment 4 adds in converter is 35t, molten iron is 185t, the control of converter charge weight exists
225t。
Confirmed by practical application, the 35t desulfurization slag irons in converter all melt in 8min.
In order to ensure follow-up compound desulfurization effect, after desulfurization slag iron the end of melting, when carrying out half steel tapping, half steel tapping
Carbon content is by 3.00% control；Tapping process charging and tapping process temperature drop itself are considered at the same time, and half steel tapping temperature is controlled
At 1500 DEG C.
In addition, consider with eat desulfurization slag iron half steel molten steel sulfur content it is higher, in order to alleviate the pressure of compound desulfurization,
Embodiment 4 adds slag charge in tapping process, carries out pre- desulfurization and to compound desulfurization slag making, i.e.,：It is small that tapping starts i.e. addition 800kg
Grain lime, mixing steel stream together add, to tap 1/5 before add；Variety steel heat is smelted after in order to ensure half steel desulfurization
Balance, carries out half steel and is operated with silicon, i.e., granule lime adds common ferrosilicon 700kg (reference target Si after finishing：0.23%).
Meanwhile in order to ensure the slag charge and alloy melting of addition, online BOTTOM ARGON BLOWING is controlled in tapping process, flow is pressed
500Nl/min is controlled；Bottom blowing strong mixing 5min is used after having gone out steel, bottom blowing flow is 1000NL/min.
For embodiment 4 also by obtained half steel water progress desulfurization process of tapping, the desulfurization cycle is 60min.Injection (is opened early period
Begin the preceding 1-2min being blown) carrier gas flux 100Nm3After/h, pulvis speed 7kg/min, injection tank pressure≤0.65Mpa, pulvis
Speed is adjusted to 10kg/min；As tank is pressed with rise trend, adjustment carrier gas flux 110Nm during injection3/ h, presses such as tank and continues
Rise, reduces pulvis speed to 7kg/min；Voltage-controlled system≤the 0.68Mpa of the whole tank of injection.
In addition, in order to ensure follow-up compound desulfurization effect, embodiment 4 uses step and parameter similar to Example 3, most
The control of half steel sulfur content is 0.001% at last.
Technical solution in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
The present invention replaces steel scrap using desulfurization slag iron, is melted in converter using molten iron+blowing, the end of melting is laggard
Row tapping steel (half steel)；The substance of the desulfurization slag iron is≤1500Kg, thickness≤300mm, length≤1000mm, i.e. this hair
It is bright that desulfurization slag iron weight and size are controlled so that the desulfurization slag iron being capable of rapid melting in converter molten iron；This hair
It is bright then control converter to open to blow oxygen supply intensity be 1.9-3.5Nm3/ min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity
For 0.077~0.124Nm3/min/t；I.e. to converter iron process oxygen supply intensity and bottom blowing intensity Comprehensive Control, it is ensured that desulfurization
All melted before slag iron tapping.The method of the present invention can stablize consumption desulfurization slag iron, features simple and practical process, and be refined in conventional converter
It can be used in steel technique, be applicable in wide.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into all change and modification of the scope of the invention.Obviously, those skilled in the art can be to the present invention
Carry out various modification and variations without departing from the spirit and scope of the present invention.If in this way, these modifications and changes of the present invention
Belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to exist comprising these modification and variations
It is interior.
Claims (10)
- A kind of 1. method for handling desulfurization slag iron, it is characterised in that：The described method includes：Desulfurization slag iron is added in the molten iron of converter blowing makes its fusing, the monolithic weight of the desulfurization slag iron for≤ 1500Kg, thickness≤300mm, length≤1000mm；Converter oxygen supply intensity is 1.9-3.5Nm3/ min/t, total oxygen-supplying amount are 3000~3500Nm3；Bottom blowing intensity for 0.077~ 0.124Nm3/min/t；After desulfurization slag iron the end of melting, half steel tapping is carried out.
- 2. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：The desulfurization slag iron thickness is 10mm-300mm, length 10mm-1000mm.
- 3. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：The oxygen supply that the converter is opened when blowing is strong Spend for 3-3.5Nm3/ min/t, after confirming that point catches fire, the oxygen supply intensity is adjusted to 1.9-2.0Nm3/min/t。
- 4. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：The desulfurization slag iron added in converter When weight is 35-45t, molten iron is 185-195t, converter charge weight is controlled in 225-235t.
- 5. the method for the processing desulfurization slag iron according to claim 1 or 4, it is characterised in that：Oxygen supply time is 8~10min.
- 6. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：Further include：The desulfurization slag iron melts Carbon content at the end of change is 2.80%≤C≤3.20%, and the temperature control of the half steel tapping is 1460 DEG C≤T≤1520 ℃。
- 7. the method for the processing desulfurization slag iron according to claim 1 or 4, it is characterised in that：Further include：Opened in half steel tapping Begin to add 800~1500kg granule limes in molten iron；Granule lime adds ferrosilicon again after finishing so that Si contents are in molten iron 0.23~0.34%.
- 8. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：Further include：Controlled in tapping process Online BOTTOM ARGON BLOWING, flow control are 500~800Nl/min；Bottom blowing strong mixing 3-5min is used after having gone out steel, bottom blowing flow is 800-1500NL/min。
- 9. the method for processing desulfurization slag iron according to claim 1, it is characterised in that：Further include：By half obtained that tap Steel water desulfurization, desulfurization cycle are 60~70min；Target sulphur content is 0.001-0.005%.
- 10. the method for processing desulfurization slag iron according to claim 9, it is characterised in that：The desulfurization includes：Desulfurizing agent powder Agent is placed in injection tank, the desulfurizing agent pulvis in injection tank is delivered to spray gun by carrier gas, then sprayed its desulfurizing agent by spray gun It is blown into half steel water；The carrier gas flux of 1-2min is 100-120Nm before the injection3/ h, desulfurizing agent pulvis speed for 7~ 10kg/min；After injection tank pressure≤0.65Mpa, desulfurizing agent pulvis speed is adjusted to 10~13kg/min.
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| CN201711285601.1A CN108034788B (en) | 2017-12-07 | 2017-12-07 | Method for treating desulfurized iron slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241283A (en) * | 2019-06-13 | 2019-09-17 | 首钢集团有限公司 | A kind of converter of desulfurization slag iron utilizes method |
| CN110396566A (en) * | 2019-07-26 | 2019-11-01 | 首钢集团有限公司 | A kind of method that desulfurization slag iron is eaten in converter time |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110241283A (en) * | 2019-06-13 | 2019-09-17 | 首钢集团有限公司 | A kind of converter of desulfurization slag iron utilizes method |
| CN110396566A (en) * | 2019-07-26 | 2019-11-01 | 首钢集团有限公司 | A kind of method that desulfurization slag iron is eaten in converter time |
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