CN107177718A - A kind of novel low carbon low-silicon steel refining slag - Google Patents
A kind of novel low carbon low-silicon steel refining slag Download PDFInfo
- Publication number
- CN107177718A CN107177718A CN201710234978.8A CN201710234978A CN107177718A CN 107177718 A CN107177718 A CN 107177718A CN 201710234978 A CN201710234978 A CN 201710234978A CN 107177718 A CN107177718 A CN 107177718A
- Authority
- CN
- China
- Prior art keywords
- slag
- steel
- refining
- refining slag
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/068—Decarburising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of novel low carbon low-silicon steel refining slag, raw material includes lime, aluminum shot, fluorite, calcium carbide, magnesium carbonate；Refining slag chemical constituent is：TFe：0.45%~0.56%、SiO2：4.51%~4.52%、CaO：50.12%~54.15%、MgO：9.32%~11.19%、Al2O3：35.6%~36.1%、MnO：0.12%~0.14%、TiO2：0.13%~0.15%、S：0.32%~0.46%、P2O5：0.015% ~ 0.019%, remaining is inevitable impurity.Have cost low compared with prior art, the stable advantage of product quality.
Description
Technical field
The present invention relates to field of iron and steel smelting, more particularly to a kind of novel low carbon low-silicon steel refining slag.
Background technology
Dry plate is also known as tinplate, is that substrate is low carbon low silicon steel plate, the tin plating product made from steel of steel band, tinplate extensively should
For industries such as tank processed, packaging material, stamping containers.The chemical composition of black plate, grain size, the precipitation of solid solution carbon nitrogen,
Smooth rate is to influence the principal element of black plate hardness, anti-crease property etc.；Tinplate（RGMR2）Substrate is low-silicon low-carbon
Steel, chemical composition requirement carbon content is below 0.04% in process of production, and silicon is small by refining controlling field trash less than 0.03%
In below 0.04/m2,20 μm of particle size.Refining slag is then to realize to improve Cleanliness of Molten Steel in refining process, in reduction steel
The main method of inclusion content.Refining slag serves insulation, deoxidation, desulfurization in refining process and absorbs steel inclusion and folder
The effects such as debris denaturation.Therefore, select suitable refining slag system and refining slag extremely important according to different steel grade, refining slag into
Distribution ratio plays vital effect with reference to refining slag system for the control of steel inclusion, and refining process is for refining slag
The control of system, is directly connected to the controlled level of refinery practice, and the adjustment of refining slag system relies primarily on the composition of refining slag itself
Control and smelting steel inclusion.
At present, during LF refining black plate, refining slag chemical composition is generally TFe1.44%, SiO25.34%、
CaO57.68%、MgO 5.03%、Al2O3 26.3%、MnO 0.18%、TiO2 0.21%、S 0.59%、P2O5 0.018%；Basicity R：
10.80, lime, calcium carbide, fluorite being used slag making raw material, consumption is respectively 9kg/t, 1.9kg/t, 2.9kg/t more.Prior art
TFe contents are high in refining slag, and molten steel recovery rate reduction, slag oxidizing is stronger, and deoxidation is insufficient, are unfavorable for field trash absorption, slag
Middle CaO/Al2O3Value is high, is unfavorable for Al2O3The absorption being mingled with, if increasing Al merely2O3Content, can cause slag mobility drastically to become
Greatly, SiO is made2+Al→Si+Al2O3Significant reaction is accelerated, and increases Si in steel seriously, so as to can not be applied in low-carbon low-silicon steel.
Meanwhile, content of MgO is low, and molten steel corrodes serious to the resistance to material of ladle, when causing production black plate steel grade, total oxygen content rise,
Steel grade is mingled with exceeded, and the simple MgO that improves can improve the viscosity of slag, so as to reduce the mobility of slag, be unfavorable for inclusion floating, therefore
It can not be applied in low-carbon low-silicon steel.Simultaneously as calcium carbide consumption is big, refining process is caused to increase C up to 0.018%, converter
It is forced to reduce terminal C content, increases steel grade converter blow loss, so that production cost increase.The above mentioned problem that presently, there are is tight
Ghost image rings product qualification rate, causes business economic to lose.Therefore it is badly in need of optimizing refining slag, for the life of black plate steel
Production.
The content of the invention
The technical assignment of the present invention is to be directed to above the deficiencies in the prior art, and the present invention proposes a kind of low silicon of novel low carbon
Steel refining slag, by improveing refining slag ingredient, so as to reduce refining process while reducing refining slag oxidizing, improve mobility
Increase Si, improve refining slag and be mingled with adsorption capacity and reduce mild steel refining process carburetting.
Raw material ton steel addition of the present invention：8.5 ~ 9.5kg of lime；Aluminum shot：1.2~1.5kg；Fluorite：0.7~0.9kg；Calcium carbide
0~0.3kg；1.3 ~ 1.5kg of magnesium carbonate；
Refining slag chemical constituent is：TFe：0.45%~0.56%、SiO2：4.51%~4.52%、CaO：50.12%~54.15%、MgO：
9.32%~11.19%、Al2O3：35.6%~36.1%、MnO：0.12%~0.14%、TiO2：0.13%~0.15%、S：0.32%~0.46%、
P2O5：0.015% ~ 0.019%, remaining is inevitable impurity.
Refining slag of the present invention is compared with existing refining slag：
1st, segmentation adds aluminum shot, stirs 4 ~ 6min using 0.4 ~ 0.5kg/t aluminum shots in argon station first, ladle slag is carried out pre- de-
Oxygen, remaining aluminum shot is added in LF refining, and deep deoxidation is carried out to refining slag, and aluminum shot segmentation is added, and is conducive to improving refining pre-slag
Middle Al2O3Content, beneficial to the refining quick deoxidation of early stage, slugging, forms liquid slag blanket, isolation molten steel and air, reduces molten steel oxygen uptake
Nitrogen is inhaled, calcium carbide, fluorite consumption is reduced；Make Al in refining slag2O3Ratio is improved to 30 ~ 35%, controls CaO/Al2O31.4 ~ 1.5, slag
Middle deoxidation products Al2O3Belong to on-surface-active material, the 13CaO7Al of low melting point can be generated with CaO2O3Compound, increases
Plus Al in slag2O3Content, can increase slag mobility and reduction Al2O3Activity, so as to be conducive to the discharge of steel inclusion, but
It is traditionally simple to increase Al2O3Content can cause slag mobility drastically to become big, make SiO2+Al→Si+Al2O3Significant reaction is accelerated,
Increase Si in steel serious, so as to can not be applied in low-carbon low-silicon steel；
2nd, using part MgCO3As foaming agent, surfactant, instead of part CaC2, make in slag content of MgO improve to 9 ~
10%, erosion of the slag to ladle is reduced, SiO is reduced2Activity, reduce refining process carburetting, MgO, be the resistance to material of ladle it is main into
Point, MgO in slag is improved, erosion of the refining slag to the resistance to material of steel ladle can be reduced, so that beneficial to Molten Steel Cleanliness is improved, while MgO
For surface reactive material, and fusing point is higher, and the simple MgO that improves can improve the viscosity of slag, so as to reduce the mobility of slag, be unfavorable for
Inclusion floating, therefore can not be applied in low-carbon low-silicon steel, find control mass ratio Al by studying2O3/ MgO be 3.2 ~
3.8, best results；
3rd, CaO-Al is formed in molten steel2O3- MgO systems slag, effectively reduction is because improving Al2O3And cause slag mobility to be increased sharply, lead
While causing molten steel increasing Si contradiction, reduction MgO improves the influence flowed to slag, so as to reach that refining slag is most preferably mingled with energy of adsorption
While power, reduce refining process and increase Si, carburetting C, reduce absorption of the refining slag to resistance to material, so as to improve Molten Steel Cleanliness, reach
To the requirement of black plate steel.
Embodiment
The low-carbon low-silicon steel refining slag of the present invention is described in further details with reference to specific embodiment：
Prior art control group：
Raw material ton steel addition be：Lime 9kg；Aluminum shot 0.4kg；Fluorite 2.9kg；Calcium carbide 1.9kg.
Obtain refining slag chemical composition as follows：TFe：1.44%、SiO2：5.34%、CaO：57.68%、MgO：5.03%、
Al2O3：26.3%、MnO：0.18%、TiO2：0.21%、 S：0.59%、P2O5：0.018%th, remaining is inevitable impurity；Basicity R：
10.8。
Above-mentioned refining slagging process comprises the following steps：
（1）Refinement and deoxidation, slag making：
Molten steel is stirred to sampling Argon after LF, argon flow amount 300-500m3/h, and lime 9kg/t, fluorite are added after Argon 3-5min
2.9kg/t, steel ladle bottom argon blowing flow is reduced in 150-200m3/h feeding temperature-raisings, slugging, transmission process according to addition aluminum shot
0.4kg/t, calcium carbide 1.9kg/t；
（2）Stirring desulphurization：
Molten steel is heated to after 1590-1610 DEG C, BOTTOM ARGON BLOWING flow is improved to 700-800m3/h, strong mixing 2-4min, samplingization
Test, molten steel desulfurizing to ＜ 0.02%；
（3）Calcium treatment：
BOTTOM ARGON BLOWING flow is adjusted to 150-200m3/h, seamless metal calcium line 200-250m, wire-feeding velocity control are fed using wire feeder
System prevents molten steel from turning over greatly in 2-2.5m/s, line feeding；
（4）Soft blow：
After line feeding, bottom blowing flow is adjusted to outbound after 50-100m3/h, Argon 10-15min.
Embodiment 1
Raw material ton steel addition be：Lime 9kg；Aluminum shot 1.2kg；Fluorite 0.9kg；Calcium carbide 0.3kg；Magnesium carbonate 1.3kg.
Obtain refining slag chemical constituent as follows：TFe：0.56%、SiO2：4.52%、CaO：53.06%、MgO：9.32%、Al2O3：
35.6%、MnO：0.13%、TiO2：0.13%、S：0.46%、P2O5：0.019%th, remaining is inevitable impurity；Basicity R：11.74.
Above-mentioned refining slagging process comprises the following steps：
（1）Ladle slag fritting：
In converter tapping process, during tapping 1/3,3kg/t lime, 0.6kg/t fluorites, reduction ladle slag fusing are added into ladle
Temperature, prevents ladle slag from crusting；
（2）Ladle slag argon station pre-deoxidation：
After converter tapping is finished, molten steel enters after argon station, uniform on the ladle top of the slag to be sprinkled into 0.4kg/t aluminum shots, stirs 4-6min,
Steel ladle bottom argon blowing flow is 400-600 m3/h；
（3）Refinement and deoxidation, slag making：
Argon is stirred after molten steel is sampled to LF, argon flow amount 300-500m3/h, and lime 6kg/t, fluorite are added after Argon 3-5min
0.3kg/t, MgCO31.3kg/t, steel ladle bottom argon blowing flow is reduced to root in 150-200m3/h feeding temperature-raisings, slugging, transmission process
According to addition aluminum shot 0.8kg/t, calcium carbide 0.3kg/t；
（4）Stirring desulphurization：
Molten steel is heated to after 1590-1610 DEG C, BOTTOM ARGON BLOWING flow is improved to 700-800m3/h, strong mixing 2-4min, samplingization
Test, molten steel desulfurizing to ＜ 0.01%；
（5）Calcium treatment：
BOTTOM ARGON BLOWING flow is adjusted to 150-200m3/h, seamless metal calcium line 200-250m, wire-feeding velocity control are fed using wire feeder
System prevents molten steel from turning over greatly in 2-2.5m/s, line feeding；
（6）Soft blow：
After line feeding, bottom blowing flow is adjusted to outbound after 50-100m3/h, Argon 10-15min.
Embodiment 2
Raw material ton steel addition be：Lime 8.5kg；Aluminum shot：1.35kg；Fluorite：0.8kg；Calcium carbide 0.1kg；Magnesium carbonate 1.42kg.
Obtaining refining slag chemical constituent is：TFe：0.51%、SiO2：4.52%、CaO：50.12%、MgO：11.19%、Al2O3：
35.8%、MnO：0.14%、TiO2：0.15%、S：0.42%、P2O5：0.015%th, remaining is inevitable impurity, basicity R：11.0.
Above-mentioned refining slagging process comprises the following steps：
（1）Ladle slag fritting：
In converter tapping process, during tapping 1/3,3kg/t lime, 0.6kg/t fluorites, reduction ladle slag fusing are added into ladle
Temperature, prevents ladle slag from crusting；
（2）Ladle slag argon station pre-deoxidation：
After converter tapping is finished, molten steel enters after argon station, uniform on the ladle top of the slag to be sprinkled into 0.45kg/t aluminum shots, stirs 4-
6min, steel ladle bottom argon blowing flow is 400-600 m3/h；
（3）Refinement and deoxidation, slag making：
Argon is stirred after molten steel is sampled to LF, argon flow amount 300-500m3/h, and lime 5.5kg/t, firefly are added after Argon 3-5min
Stone 0.2kg/t, MgCO31.42kg/t, steel ladle bottom argon blowing flow is reduced in 150-200m3/h feeding temperature-raisings, slugging, transmission process
Add aluminum shot 0.9kg/t, calcium carbide 0.1kg/t；
（4）Stirring desulphurization：
Molten steel is heated to after 1590-1610 DEG C, BOTTOM ARGON BLOWING flow is improved to 700-800m3/h, strong mixing 2-4min, samplingization
Test, molten steel desulfurizing to ＜ 0.01%；
（5）Calcium treatment：
BOTTOM ARGON BLOWING flow is adjusted to 150-200m3/h, seamless metal calcium line 200-250m, wire-feeding velocity control are fed using wire feeder
System prevents molten steel from turning over greatly in 2-2.5m/s, line feeding；
（6）Soft blow：
After line feeding, bottom blowing flow is adjusted to outbound after 50-100m3/h, Argon 10-15min.
Embodiment 3
Raw material ton steel addition be：Lime 9.5kg；Aluminum shot：1.5kg；Fluorite：0.7kg；Calcium carbide 0kg；Magnesium carbonate 1.5kg.
Obtaining refining slag chemical constituent is：TFe：0.45%、SiO2：4.51%、CaO：54.15%、MgO：10.31%、Al2O3：
36.1%、MnO：0.12%、TiO2：0.14%、S：0.32%、P2O5：0.015%th, remaining is inevitable impurity；Basicity R：12.
Above-mentioned refining slagging process comprises the following steps：
（1）Ladle slag fritting：
In kiln process, during tapping 1/3,3kg/t lime, 0.6kg/t fluorites, reduction ladle slag fusing temperature are added into ladle
Degree, prevents ladle slag from crusting；
（2）Ladle slag argon station pre-deoxidation：
After converter tapping is finished, molten steel enters after argon station, uniform on the ladle top of the slag to be sprinkled into 0.5kg/t aluminum shots, stirs 5-7min,
Steel ladle bottom argon blowing flow is 400-600 m3/h；
（3）Refinement and deoxidation, slag making：
Argon is stirred after molten steel is sampled to LF, argon flow amount 300-500m3/h, and lime 6.5kg/t, firefly are added after Argon 4-6min
Stone 0.1kg/t, MgCO31.5kg/t, steel ladle bottom argon blowing flow is reduced in 150-200m3/h feeding temperature-raisings, slugging, transmission process
Add 1kg/t aluminum shots；
（4）Stirring desulphurization：
Molten steel is heated to after 1590-1610 DEG C, BOTTOM ARGON BLOWING flow is improved to 700-800m3/h, strong mixing 2-4min, samplingization
Test, molten steel desulfurizing to ＜ 0.01%；
（5）Calcium treatment：
BOTTOM ARGON BLOWING flow is adjusted to 150-200m3/h, seamless metal calcium line 200-250m, wire-feeding velocity control are fed using wire feeder
System prevents molten steel from turning over greatly in 2-2.5m/s, line feeding；
（6）Soft blow：
After line feeding, bottom blowing flow is adjusted to outbound after 50-100m3/h, Argon 10-15min.
Low-carbon low-silicon steel, because endpoint carbon content of converter is low, Molten Steel over-oxidation is serious, using aluminium deoxidation, contains in steel big
The nonmetal inclusion of amount, these nonmetal inclusions need to be removed during LF refining has good absorption folder it is necessary to refining slag
Miscellaneous ability, thus it requires refining slag has relatively low surface tension and good mobility, adsorbs and discharges beneficial to field trash.But
It is that mobility is very good, easily increases Si, poor fluidity, refining slag absorption is mingled with limited in one's ability.Due in such molten steel in refining process
Contain higher Al（0.020%-0.040%）, with SiO in slag2Can occur following reaction：SiO2+Al→Si+Al2O3, slag flowing
Property it is better, the reaction it is easier occur, and low-carbon low-silicon steel require Si be less than 0.03%.Al2O3Belong to on-surface-active material, simultaneously
The 13CaO7AL of low melting point can be produced with CaO2O3Al in compound, increase slag2O3Content, can increase slag mobility and carry
High Al2O3Activity, be conducive to the discharge of steel inclusion, make entire oxygen content in the steel content reduction；But it is traditionally simple to increase Al2O3
Content can cause slag mobility drastically to become big, make SiO2+Al→Si+Al2O3Significant reaction is accelerated, and increases Si in steel seriously, silicate
It is mingled with, it is impossible to applied in low-carbon low-silicon steel.
The main component of calcium carbide is CaC2, CaC2Play a part of foaming agent, deoxidier, desulfurizing agent in refining process, be
LF refining increases C main cause, reduces its addition, then increases C amount in follow-up refining in steel and just can accordingly reduce, contribute to
Reduce cost.
The main component of fluorite is CaF2, CaF2Reduction calcium system complex inclusion fusing point is primarily served, destruction CaO surfaces are caused
Close desulfurization layer, the effect of reduction slag viscosity, but the F element Eroded ladle liners wherein contained, and environmental pollution
Seriously.In the present invention, increase Al2O3Content, utilize part Al2O3To replace CaF2, reach good desulfurized effect, it is possible to decrease
Fluorite consumption, while reducing CaF2Negative effect.
MgCO3Decomposed during refining slag and produce CO2And MgO, add MgCO3Increase gas generating capacity, adjust clinker
Can, make clinker that there is good storage bubble ability；MgO is the main component of the resistance to material of ladle, improves MgO in slag, can reduce refining slag
Erosion to the resistance to material of steel ladle, so that beneficial to Molten Steel Cleanliness is improved, while MgO is surface reactive material, and fusing point is higher, it is single
Pure raising MgO can raise the viscosity of slag, so as to reduce the mobility of slag, be unfavorable for inclusion floating, therefore can not be in low carbon low silicon
It is difficult to be applied in steel.Found by studying, control basicity R:In the case of 11 ~ 12, in mass ratio Al2O3/ MgO be 3.2 ~
3.8, CaO/Al2O3：When between 1.4 ~ 1.5, CaO-Al is formed in molten steel2O3- MgO systems slag, effectively reduction is because improving Al2O3And make
Slagging mobility is increased sharply, and while causing molten steel increasing Si contradiction, is also reduced content of MgO and is improved the shadow flowed to slag
Ring, while reaching that refining slag is most preferably mingled with adsorption capacity, reduce refining process and increase Si, increase C, reduce suction of the refining slag to resistance to material
It is attached, so as to improve Molten Steel Cleanliness, reach black plate steel requirement.
In summary, by improved component, reasonably matched, many-sided mutually coordinated, restriction, reaches between composition
Arrive：1. improve refining slag mobility, steel inclusion is adsorbed beneficial to refining slag, while effectively suppressing molten steel increases Si；2. drop simultaneously
Low CaO/Al2O3And Al in slag2O3Activity and reduction molten steel Silicate Inclusions；3. calcium carbide consumption is reduced, and then reduces subsequent fine
Increase C in refining in steel；4. fluorite consumption can be reduced, erosion of the slag to ladle is reduced.
In processing step, substep is taken to add aluminum shot so that refining slag forms liquid slag layer, isolation with field trash in slag in advance
Molten steel and air, reduce molten steel oxygen uptake, amount of nitrogen sucking, reduce the refining process heat time, to improve the cleanliness factor of molten steel, easily realize
The accurate control of final slag composition is refined, so as to improve product quality.
Control group, 1-3 tons of steel refining slag raw material compositions of embodiment and cost compare：
As can be seen from the above table, each embodiment cost is less than control group.
Control group, embodiment 1-3 liquid steel sampling detection level results are as follows：
As can be seen from the above table, metalloid content and field trash size, content have all reached black plate use in each embodiment
The requirement of steel, and refining process carburetting, increasing silicon are significantly lower than control group, qualification rate reaches 100%, substantially reduces black plate
Oven improvement, and do not increase production cost, enterprise economic benefit.
It should be noted that the particular of the present invention is to the present invention have been described in detail, for ability
For the technical staff in domain, its various of progress is obviously changed without departing from the spirit and scope of the present invention
Become all within protection scope of the present invention.
Claims (2)
1. a kind of novel low carbon low-silicon steel refining slag, it is characterised in that：Refining slag chemical constituent is：TFe：0.45%~0.56%、
SiO2：4.51%~4.52%、CaO：50.12%~54.15%、MgO：9.32%~11.19%、Al2O3：35.6%~36.1%、MnO：
0.12%~0.14%、TiO2：0.13%~0.15%、S：0.32%~0.46%、P2O5：0.015% ~ 0.019%, remaining is inevitable miscellaneous
Matter.
2. a kind of novel low carbon low-silicon steel refining slag according to claim 1, it is characterised in that：Raw material includes lime, aluminium
Grain, fluorite, calcium carbide, magnesium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234978.8A CN107177718B (en) | 2017-04-12 | 2017-04-12 | Novel low-carbon low-silicon steel refining slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234978.8A CN107177718B (en) | 2017-04-12 | 2017-04-12 | Novel low-carbon low-silicon steel refining slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107177718A true CN107177718A (en) | 2017-09-19 |
| CN107177718B CN107177718B (en) | 2020-03-20 |
Family
ID=59831951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710234978.8A Active CN107177718B (en) | 2017-04-12 | 2017-04-12 | Novel low-carbon low-silicon steel refining slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107177718B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408741A (en) * | 2019-07-30 | 2019-11-05 | 上海电气上重铸锻有限公司 | Steel refining slag system formula |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776323A (en) * | 2012-07-30 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Smelting method of steel for hypoxia axle |
-
2017
- 2017-04-12 CN CN201710234978.8A patent/CN107177718B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776323A (en) * | 2012-07-30 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Smelting method of steel for hypoxia axle |
Non-Patent Citations (1)
| Title |
|---|
| 张东力 等: "LF埋弧精炼渣发泡剂实验研究", 《炼钢》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408741A (en) * | 2019-07-30 | 2019-11-05 | 上海电气上重铸锻有限公司 | Steel refining slag system formula |
| CN110408741B (en) * | 2019-07-30 | 2021-12-14 | 上海电气上重铸锻有限公司 | Method for preparing steel refining slag system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107177718B (en) | 2020-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103014221B (en) | Method for producing high-aluminum steel plate blanks | |
| CN102321785B (en) | Method for smelting high-silicon low-oxygen clean steel | |
| CN101956040A (en) | Producing method of clean steel | |
| CN102268513B (en) | Method for improving castability of molten steel of medium and low carbon steel | |
| CN107201422B (en) | A kind of production method of mild steel | |
| CN111057817A (en) | Economic and environment-friendly efficient desulfurization refining slag system and production method thereof | |
| CN110804685A (en) | Slag washing and refining process for tapping of converter | |
| CN101935740B (en) | White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof | |
| JP2012012648A (en) | Method for applying desulfurize-treatment to molten steel | |
| CN112267004A (en) | Smelting method of low-cost clean steel | |
| RU2608865C2 (en) | Method of desulphurising steel | |
| WO2013134889A1 (en) | Process for producing low-cost clean steel | |
| CN112458236B (en) | Method for refining and deep desulfurization of molten steel, device for refining molten steel and application | |
| CN113122680A (en) | Steel slag modifier and preparation and use methods thereof | |
| JP5891826B2 (en) | Desulfurization method for molten steel | |
| CN107177718A (en) | A kind of novel low carbon low-silicon steel refining slag | |
| CN109576441B (en) | RH refining method for controlling wettability of inclusions in low-carbon aluminum killed steel | |
| CN106337101A (en) | Calcium series top slag modification agent and application method thereof | |
| CN109338041B (en) | Method for applying limestone to LF refining instead of calcium carbide | |
| CN105018675B (en) | Stainless steel EAF foaming slag and its application method | |
| CN104946850A (en) | Converter tapping slag washing method using low-Al alumina ball | |
| CN114836593A (en) | Smelting process of low-carbon aluminum-containing cold forging steel | |
| CN114292984A (en) | RC process technology for researching [ Mn ] [ Si ] element by LF refining slag component | |
| CN106350637A (en) | Modifying agent for calcium-series steel ladle slag and application method thereof | |
| CN101113484A (en) | LF composite deoxidization reducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A new refining slag for low carbon and low silicon steel Effective date of registration: 20211222 Granted publication date: 20200320 Pledgee: Rizhao Bank Co., Ltd Pledgor: RIZHAO STEEL HOLDING GROUP Co.,Ltd. Registration number: Y2021980015819 |