CN108486310A - A kind of method of steelmaking process liquid liquid alloying - Google Patents
A kind of method of steelmaking process liquid liquid alloying Download PDFInfo
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- CN108486310A CN108486310A CN201810320858.4A CN201810320858A CN108486310A CN 108486310 A CN108486310 A CN 108486310A CN 201810320858 A CN201810320858 A CN 201810320858A CN 108486310 A CN108486310 A CN 108486310A
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- liquid
- induction heater
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- electric furnace
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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
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The present invention relates to a kind of steelmaking process liquid liquid alloyage process, it is a part for the steel scrap smelted and molten iron will to be needed to be added in induction heater to heat, another part is added in converter or electric furnace and heats, first the molten steel after being heated in induction heater is poured into ladle or tundish, the molten steel of converter or electric furnace is finally blended into ladle or tundish.The present invention does not need oxygen blast during heating by using using induction heater, effectively prevents the loss of alloying element；The method of the present invention can improve scrap ratio using induction heater, reduce production cost, enable resource cycling and reutilization；It not only reduces converter or electric furnace steel making burden but also reduces the alloying operating time, extent of reaction is accelerated by reactive liquid solution, smelting cycle shortens, improves work efficiency.
Description
Technical field
The present invention relates to a kind of methods of steelmaking process liquid liquid alloying, belong to metallurgical technology field.
Background technology
It is, not by external energy, to lean on the physics of iron liquid itself using molten iron, steel scrap, ferroalloy as primary raw material to turn steel-making
Chemical reaction generates heat and completes steelmaking process in converter between heat and iron liquid component.Alkaline oxygen top blast and top and bottom complex blowing turn
Stove is since its speed of production is fast, big, the single furnace output of yield is high, at low cost, small investment, to be set at present using most common steel-making
It is standby.Converter mainly for the production of carbon steel, steel alloy and copper and mickel smelting.The basic task of pneumatic steelmaking is decarburization, dephosphorization, takes off
Sulphur, deoxidation；It removes removing and harmful gas and is mingled with；Improve temperature；Adjusting component.Electric furnace steel making is using electricity as the steelmaking process of the energy.It is main
Arc heat is utilized, in arcing area, temperature is up to 4000 DEG C.Smelting process is generally divided into melting stage, the heat of oxidation and reduction
Phase can not only cause oxidizing atmosphere in stove, moreover it is possible to cause reducing atmosphere, therefore the efficiency of dephosphorization, desulfurization is very high.But turning
During stove and electric furnace smelting, a large amount of scaling loss can occur in alloying element such as C, Si, Mn, main that following reaction occurs：
[C]+1/2 { O }={ CO }；
[Si]+{O2}=(SiO2)；
[Mn]+1/2{O2}=(MnO).
Addition alloy is also needed in steel-making terminal to be supplemented, smelting cost is not only increased, and also adds worker's labour
Intensity causes smelting cycle to extend.Adding amount of scrap steel is more in convertor steelmaking process simultaneously, and the cost of saving is higher.Steel-making
The preheating temperature of steel scrap and alloy material is higher during (converter and electric furnace), and smelting cycle is also shorter, and cost is also lower.
China Patent Publication No. is that 102399932 B of CN disclose " a method of reduce converter hot metal single consumption ", is led to
It crosses and adjusts carbon at different temperatures, the proportioning of silicon, and the addition of steel scrap is adjusted, to make converter terminal carbon temperature coordinate substantially,
Ensure the stabilization of endpoint molten steel quality.But although the hot metal single consumption of converter is reduced in view of operating result, in the process
Still carbon, the consumption of silicon are increased, and due to carbon, the rise in price of silicon is not obviously improved in terms of economic benefit, and wave
The consumption of material is taken.Patent Publication No. CN107385145A, discloses that " a kind of heating steel scrap simultaneously improves smelting scrap ratio
Method ", by heating means using being preheated to steel scrap in scrap heating stove, come improve steel scrap into converter just
Beginning temperature, accelerate converter heating speed, improve converter smelting efficiency and smelting in steel scrap in the feed where ratio, drop
Low smelting cost.But limited by converter size, the addition ratio of steel scrap is still to be improved.China Patent Publication No. is
CN103060510A discloses " a kind of smelting process of high scrap ratio using gas heating ", in convertor steelmaking process using combustion
Gas multifunctional nozzle injecting oxygen and imflammable gas, the heat supplement convertor steelmaking process energy for generation of burning reduce lime
Equal slag formers consumption, reduces the discharge capacity of clinker iron loss and carbon, improves recovery rate of iron.But it is complicated for operation, smelting cycle is long,
Labor intensity is big.China Patent Publication No. is that 101899548 A of CN disclose " scrap steel preheating fritting, high efficient electric furnace steel-making
New process " is that steel scrap is carried out preheating fritting, more can efficiently be smelted, but there is no rational for the technique
Using the alloying element in molten iron, and alloying still uses solid alloy to carry out alloying, and smelting cycle is longer, and the technique
60% steel scrap is placed in heating furnace and carries out fritting, it is the efficiency for improving electric furnace that surface, which is seen, substantially only will limit
Sexual factor processed is transferred to heating furnace, is not really efficiently to smelt there is no efficiency is fundamentally improved.
Invention content
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of steelmaking process liquid liquid alloyage process.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
A kind of steelmaking process liquid liquid alloyage process is the part addition induction of the steel scrap that will need to smelt and molten iron
It is heated in heating furnace, another part is added in converter or electric furnace and heats, then the molten steel after being heated in induction heater is poured into steel
In packet or tundish, the molten steel after converter or electric furnace heating is finally blended into ladle or tundish.
Method as described above, it is preferable that it includes the following steps：
(1) molten iron and steel scrap are added in induction heater；
(2) start the induction heater and heating heating is carried out to material；
(3) alloying element is added to induction heater according to the alloying component of required steel grade；
(4) in converter or electric furnace steel making latter stage, first the molten steel in induction heater is poured into ladle or tundish, then will
Molten steel in converter or electric furnace pours into ladle or tundish, and the two is made to mix, and realizes liquid liquid alloying.
Method as described above, it is preferable that the part is the 1/3~2/3 of the total amount of molten iron and steel scrap, the residue
Part is the 2/3~1/3 of the total amount of molten iron and steel scrap.
That is, being heated in 1/3~2/3 addition induction heater of the total amount of molten iron and steel scrap, remainder
It is added in converter or electric furnace and is heated.
Method as described above, it is preferable that it is 1500~1700 DEG C that temperature is heated in the induction heater.
Method as described above, it is preferable that the alloying element includes Si, Mn, Cr and/or Mo alloy etc..
Method as described above, it is preferable that the steelmaking process refers to refine high-carbon steel process, the phosphorus content of the high-carbon steel
It is 0.07%~1.3%, silicon content is 0.17%~0.37%, and manganese content is 0.35%~0.65%.
Method as described above, it is preferable that in the induction heater steel scrap account for steel scrap and molten iron gross mass 30%~
80%.
Method as described above, it is preferable that capping is handled the induction heater during heating.
Method as described above, it is preferable that the induction heater carries out electromagnetic agitation or Argon stirring in heating process.
Method as described above, it is preferable that the smelting cycle of the induction heater is 25~30 minutes, is smelting the later stage
It is sampled detection.
(3) advantageous effect
The beneficial effects of the invention are as follows：
The present invention does not need oxygen blast during heating by using induction heater, effectively prevents the damage of alloying element
Consumption；When individually using converter, the steel scrap of addition can only be added the 17% of its volume, because converter has slag generation, if it exceeds
Volume 17% when, the slag of generation is excessive, crosses conference causes row not come out, and when increasing induction heater, adding amount of scrap steel
It can be 30%-80%, and be generated without waste residue, increase the addition of single stove steel scrap in this way, and alloying element is avoided to be lost；
And by alloy element be pre-dissolved and carry out liquid liquid alloying, shorten alloying time, is efficiently smelted.It utilizes simultaneously
The elements such as content higher C, Si, Mn make up the element consumed in converter or EAF Steelmaking Process in molten iron, reduce and are refining
Need carburant to be added, high carbon ferromanganese, silicon carbide etc., cost-effective when steel process alloying, reduces labor intensity.
The method of the present invention can improve scrap ratio using induction heater, reduce production cost, resource is enable to recycle again
It utilizes；Not only reduce converter or electric furnace steel making burden and also reduce the alloying operating time, by reactive liquid solution quickening react into
Degree, smelting cycle shorten, improve work efficiency.
Specific implementation mode
In order to preferably explain the present invention, in order to understand, below by specific implementation mode, present invention work is retouched in detail
It states.
Embodiment 1
A kind of steelmaking process liquid liquid alloyage process, carries out according to the following steps：
(1) 1/3 being added in induction heater in an amount by molten iron and steel scrap, in addition 2/3 is added in converter or electric furnace；
(2) start induction heater and converter or electric furnace carries out material to be warming up to 1650 DEG C；
(3) alloying element is added to induction heater, such as Si, Mn, Cr, Mo alloy according to the alloying component of required steel grade
Deng；
(4) in converter or electric furnace steel making latter stage, first the molten steel in induction heater is poured into ladle or tundish, then will
Other 2/3 molten steel in converter or electric furnace pours into ladle or tundish, so that the two is mixed, it is anti-to bring it about liquid liquid
It answers, completes alloying operation.
Specifically, for preparing high-carbon steel, phosphorus content need to be 0.07%~1.3%, silicone content need to be 0.17%~
0.37%, manganese content need to be 0.35%~0.65%.If needing to mend after oxygen blast process for 60t grades by converter operation
It is charged to 600kg carbon, 180kg silicon, 360kg manganese.And carbon content is 4% or so in molten iron before entrance converter, silicone content 0.6%, manganese
Content 0.5% can all drop to extremely low level under oxygen blast operation, then require supplementation with 600kg carbon, 180kg silicon, 360kg manganese.Such as
60t is divided into 40t into converter by fruit according to the present invention, and 20t is into induction heater, carbon content in 20t molten steel in induction heater
For 800kg, silicone content 120kg, manganese 100kg, the quality of steel scrap is added, is transferred in ladle or tundish and does not almost have to supplement
Carbon, silicon and manganese content are supplemented.Dosage about 120kg, the manganese 100kg for saving silicon and manganese in this way, by silicon carbide price
1100 yuan/t, 9000 yuan/t of high carbon ferromanganese, such stove will save 2000 yuan, if the operation cycle of a converter be 40~
50 minutes/stove, one day saving cost was 57600 yuan.Meanwhile steel scrap is added in induction heater, often increase 1t steel scraps
It is added, averagely has 200~300 yuan of economic benefit, be 17%~30% calculating according to adding amount of scrap steel in induction furnace, quite
In mostly 3~5t of addition steel scrap or so, economic benefit is 600~1500 yuan/stove, and daily increased profit is 17000~43000
Member.In this way by increasing induction heater, molten steel and a steel scrap part are in induction heater, and another part is in converter or electric furnace
Middle heating, due to sharing for induction heater, molten steel content reduces in converter or electric furnace, and heating speed is accelerated, and heating can respectively
To improve smelting cycle, while the supplies consumption for supplementing scaling loss element reduces, and specifically makes in molten iron in higher C, Si, Mn and steel
Lower C, Si, Mn are neutralized in liquid, and then save supplies consumption, and induction heater is added can increase the addition of steel scrap
Amount, saves resource, increases economic efficiency.
Further, in induction heater, the addition of steel scrap can be the 30%~80% of steel scrap and molten iron gross mass, tool
Body quantity determines that the ingredient of steel scrap is preferable, adds according to waste steel quality；Steel scrap ingredient is bad, few to add.
During sensing heating stove heat, capping processing can be carried out, helps to improve temperature, saves electric power resource.
Electromagnetic agitation or Argon stirring can be carried out in induction heater simultaneously, keeps the melt ingredient in induction furnace uniform.
On smelting cycle, according to converter or for the electric furnace steel making time, the converter smelting time is 20~25 minutes stoves,
Electric furnace smelting time range is larger, carries out induction stove heat within 30 minutes before electric furnace steel tapping.By the smelting of induction heater
Time range is 25~30 minutes, can effectively improve economic benefit.
In the sensing heating stove heat later stage, it can be sampled detection, whether the ingredient detected in induction heater meets life
Production standard improves product quality.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can be changed or be modified as the equivalence enforcement of equivalent variations using technology contents disclosed above
Example.But it is every without departing from technical solution of the present invention content, according to the technical essence of the invention to appointing made by above example
What simple modification, equivalent variations and remodeling, still falls within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of steelmaking process liquid liquid alloyage process, which is characterized in that it includes：It is the steel scrap and molten iron that will need to smelt
A part be added in induction heater and heat, remainder is added in converter or electric furnace and heats, first will in induction heater plus
Molten steel after heat pours into ladle or tundish, and the molten steel after converter or electric furnace heating is finally blended into ladle or tundish.
2. liquid liquid alloyage process as described in claim 1, which is characterized in that it includes the following steps：
(1) induction heater is added in molten iron and steel scrap；
(2) start the induction heater and converter or electric furnace carries out heating heating to material；
(3) alloying element is added to induction heater according to the alloying component of required steel grade；
(4) in converter or electric furnace steel making latter stage, first the molten steel in induction heater is poured into ladle or tundish, then by converter
Or the molten steel in electric furnace pours into ladle or tundish, and the two is made to mix, and realizes liquid liquid alloying.
3. liquid liquid alloyage process as described in claim 1, which is characterized in that the part is the total amount of molten iron and steel scrap
1/3~2/3, the remainder is the 2/3~1/3 of the total amount of molten iron and steel scrap.
4. liquid liquid alloyage process as described in claim 1, which is characterized in that being heated to temperature in the induction heater is
1500~1700 DEG C.
5. liquid liquid alloyage process as claimed in claim 2, which is characterized in that the alloying element include Si, Mn, Cr and/
Or Mo alloys.
6. the liquid liquid alloyage process as described in any one of claim 1-5, which is characterized in that the steelmaking process refers to as refining
The phosphorus content of high-carbon steel process, the high-carbon steel is 0.07%~1.3%, and silicon content is 0.17%~0.37%, and manganese content is
0.35%~0.65%.
7. liquid liquid alloyage process as described in claim 1, which is characterized in that in the induction heater steel scrap account for steel scrap with
The 30%~80% of molten iron gross mass.
8. liquid liquid alloyage process as described in claim 1, which is characterized in that the induction heater adds during heating
Lid processing.
9. liquid liquid alloyage process as described in claim 1, which is characterized in that the induction heater is carried out in heating process
Electromagnetic agitation or Argon stirring.
10. liquid liquid alloyage process as described in claim 1, which is characterized in that the smelting cycle of the induction heater is
25~30 minutes, detection is sampled in the smelting later stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810320858.4A CN108486310A (en) | 2018-04-11 | 2018-04-11 | A kind of method of steelmaking process liquid liquid alloying |
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| CN201810320858.4A CN108486310A (en) | 2018-04-11 | 2018-04-11 | A kind of method of steelmaking process liquid liquid alloying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351843A (en) * | 2021-06-03 | 2021-09-07 | 钢铁研究总院淮安有限公司 | Continuous casting method and device for iron-chromium-aluminum alloy |
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| CN101381787A (en) * | 2008-10-17 | 2009-03-11 | 山西太钢不锈钢股份有限公司 | Smelting method of high-alloy steel |
| CN102766799A (en) * | 2012-08-01 | 2012-11-07 | 山西太钢不锈钢股份有限公司 | Method for smelting stainless steel with high chrome melts and dephosphorized melted iron |
| CN103642976A (en) * | 2013-11-22 | 2014-03-19 | 中原特钢股份有限公司 | H13 steel smelting process |
| CN108103261A (en) * | 2017-12-29 | 2018-06-01 | 唐山市德龙钢铁有限公司 | A kind of mini-mill steelmaking method based on converter |
-
2018
- 2018-04-11 CN CN201810320858.4A patent/CN108486310A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381787A (en) * | 2008-10-17 | 2009-03-11 | 山西太钢不锈钢股份有限公司 | Smelting method of high-alloy steel |
| CN102766799A (en) * | 2012-08-01 | 2012-11-07 | 山西太钢不锈钢股份有限公司 | Method for smelting stainless steel with high chrome melts and dephosphorized melted iron |
| CN103642976A (en) * | 2013-11-22 | 2014-03-19 | 中原特钢股份有限公司 | H13 steel smelting process |
| CN108103261A (en) * | 2017-12-29 | 2018-06-01 | 唐山市德龙钢铁有限公司 | A kind of mini-mill steelmaking method based on converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351843A (en) * | 2021-06-03 | 2021-09-07 | 钢铁研究总院淮安有限公司 | Continuous casting method and device for iron-chromium-aluminum alloy |
| CN113351843B (en) * | 2021-06-03 | 2023-11-03 | 钢铁研究总院淮安有限公司 | Continuous casting method and device for iron-chromium-aluminum alloy |
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Application publication date: 20180904 |