CN101139644A - High-basicity refining slag for slag washing of revolving furnace steel-making - Google Patents
High-basicity refining slag for slag washing of revolving furnace steel-making Download PDFInfo
- Publication number
- CN101139644A CN101139644A CNA2007102019905A CN200710201990A CN101139644A CN 101139644 A CN101139644 A CN 101139644A CN A2007102019905 A CNA2007102019905 A CN A2007102019905A CN 200710201990 A CN200710201990 A CN 200710201990A CN 101139644 A CN101139644 A CN 101139644A
- Authority
- CN
- China
- Prior art keywords
- slag
- refining slag
- making
- basicity
- furnace steel
- 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
-
- 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
Abstract
The invention relates to a high-alkalinity refining slag and a preparing method for the slag for scrubbing slag of a converter, which comprises active lime, fluorspar and industrial pure alkaline that are mixed evenly in a disk mixer. The chemical components of the slag by weight are: 70.0%<=CaO<= 88%, 0<SiO2<=3.0%, 0<Al2O3<=4.5%, 2.0%<=Na2O<=4.1%, 8.0%<=CaF2<=13.3%, 0<MgO<= 5.2% and the remainder are igloss elements and trace foreign matters such as P and S, etc., the binary alkalinity CaO/SiO2>=23.3. When the high-alkalinity refining slag is used for scrubbing slag when tapping in the converter, the melting is fast, and no splashing will occur, the desulfurization efficiency is high and steady, and can meet the requirements for refining, deoxidizing and removing non-metallic foreign matters.
Description
Technical field
The present invention relates to a kind of high basicity refining slag, particularly a kind of high-basicity refining slag for slag washing of revolving furnace steel-making and preparation method thereof belongs to technical field of ferrous metallurgy.
Background technology
Along with The development in society and economy, the user is more and more higher to the specification of quality of steel, high-quality steel is very strict to the content requirement of sulphur, oxygen and non-metallic inclusion, require S≤0.005% in the steel as high-grade pipe line steel, total oxygen in the Pinion Steel requirement steel (T[O])≤0.0015%, and the molten steel of smelting out with common steel melting furnace merely has been difficult to satisfy such specification of quality.On the other hand,, shorten the heat, also wish the part task transfers of steel melting furnace is gone to finish outside stove for enhancing productivity.Therefore, external refining is subject to people's attention day by day, and it has effects such as improving the quality of products, improve Steel Capacity, expansion kind and reduces cost in STEELMAKING PRODUCTION.
The refining deslagging process promptly is a kind of in numerous furnace outer refining technologies, has characteristics such as simple and easy to do, with low cost, is one of important technology of producing high-quality steel.The refining deslagging process is to add refining slag to ladle in the converter tapping process, utilize the powerful stirring kinetic energy of high-temperature molten steel, refining slag and the quick mixing of molten steel are dissolved each other, make it to take place the liquid-liquid reaction, reach the effect of desulfurization, removal steel water oxygen and non-metallic inclusion.In existing wash heat technology, refining slag is divided into solid slag and liquid slag two big classes, and Electric furnace steel making is used liquid slag more, converter steelmaking multi-purpose solid slag.The used slag system of solid slag is mainly four big class: CaO (quickened lime), CaO-Al
2O
3, CaO-SiO
2-Al
2O
3, CaO-SiO
2-CaF
2, also add few CaC in some refining slags
2, Na
2CO
3, material such as MgO, heat-generating agent.The adding mode of refining slag have add ladle before the tapping at the bottom of, tapping begin to add mix dash and alloying finish to add mix dash etc. several, its with converter under the slag of slag and deoxidation, alloying formation form ladle slag jointly.
In use there is the following problem in existing wash heat with refining slag:
1, basicity is on the low side, is unfavorable for follow-up refining desulfuration, deoxidation and the removal non-metallic inclusion of Al deoxidization steel.If only use quickened lime as refining slag, though can significantly improve the basicity of the ladle slag that tapping process forms, the fusing point height of quickened lime, required heat fused time of refining process is long, and rhythm of production is caused disadvantageous effect;
2, desulfurization degree is low, about 30%, can not satisfy the production requirement of some low-sulfurs, ultralow-sulfur steel usually;
3, contain CaC
2Synthetic slag in adition process, can produce CO, CO
2Splash takes place in gas, ladle slag easily, has potential safety hazard.
Therefore how research is by disposing the chemical ingredients of refining slag, suitably improve its basicity and desulfurization degree, when being applied to the wash heat of converter tapping process, in ladle, can form high basicity liquid slag layer fast, make the molten steel nitrogen increased amount few, the requirement of satisfying refinement and deoxidation simultaneously and removing non-metallic inclusion.Refining slag with suitable chemical ingredients proportioning can guarantee that quality product can guarantee safety in production again, is that converter steelmaking is enhanced productivity, and guarantees the key problem in technology of technology direct motion.
Summary of the invention
The purpose of this invention is to provide a kind of high-basicity refining slag for slag washing of revolving furnace steel-making, when being applied to the wash heat of converter tapping process, fusing is fast, not splash, and desulfuration efficiency is high and stable, the requirement of satisfying refinement and deoxidation and removing non-metallic inclusion.
Purpose of the present invention is achieved through the following technical solutions: a kind of high-basicity refining slag for slag washing of revolving furnace steel-making, form by quickened lime, fluorite and calcined soda for industry.Be specially quickened lime, fluorite and calcined soda for industry mixed by a certain percentage and form.
The chemical ingredients of high-basicity refining slag for slag washing of revolving furnace steel-making of the present invention contains by weight percentage: 70.0%≤CaO≤88%, 0＜SiO
2≤ 3.0%, 0＜Al
2O
3≤ 4.5%, 2.0%≤Na
2O≤4.1%, 8.0%≤CaF
2≤ 13.3%, 0＜MgO≤5.2%, all the other are igloss composition and trace impurities such as P, S, wherein CaO/SiO
2〉=23.3.
The igloss composition mainly is because remaining CO is arranged in the lime
2(general content be lime weight about 2%) has the active effect of the lime of increasing, and the lime back igloss composition that is heated will decompose the gasification discharge.
Further, the chemical ingredients of high-basicity refining slag for slag washing of revolving furnace steel-making of the present invention is preferably (by weight percentage): 70.8%≤CaO≤85%, 0.3%≤SiO
2≤ 2.9%, 0.8%≤Al
2O
3≤ 3.9%, 2.2%≤Na
2O≤3.8%, 8.4%≤CaF
2≤ 12.9%, 0.2%≤MgO≤4.7%, all the other are igloss composition and trace impurities such as P, S.Refining slag in the preferable range has the ability of good desulfurization, deoxy performance and removal non-metallic inclusion.
The hemisphere point temperature of fusion of high-basicity refining slag for slag washing of revolving furnace steel-making of the present invention: 1400～1450 ℃.
The preparation method of high-basicity refining slag for slag washing of revolving furnace steel-making of the present invention is as follows:
1, detects raw material: the chemical ingredients of quickened lime, fluorite, calcined soda for industry;
2, with the quickened lime fragmentation, granularity is not more than 5mm, crosses 180 mesh sieves after the fluorite fragmentation;
3, the condition that satisfies according to high basicity refining slag chemical component weight per-cent, the weight of calculating desired raw material;
4, take by weighing above-mentioned raw materials mixing in disk mixer in proportion;
5, carry out weather-proof dressing.
High-basicity refining slag for slag washing of revolving furnace steel-making moisture content of finished products of the present invention≤1.0%, granularity≤5.0mm.
Compare with refining slag with general converter steelmaking wash heat, refining slag of the present invention mainly contains higher CaO and lower SiO
2, Al
2O
3Component can increase the basicity of refining slag, strengthens absorbing the ability of inclusion; CaF
2Component is content (CaF in the common refining slag about 10% by weight percentage
2Content is more than 20%), and allocated about 5% calcined soda for industry into, can reduce the fusing point of refining slag and improve liquidity, make its fusing fast, not splash; The CaO/Si0 of refining slag
2The ratio height can form high basicity liquid slag layer fast in ladle in the converter tapping process, the calcined soda for industry of adding proper content helps to improve desulfuration efficiency (Na
2CO
3Sweetening power extremely strong, but Na
2CO
3Too high levels serious to material corrosions such as ladle linings, therefore at present generally do not contain this raw material in the refining slag that uses), reduce molten steel nitrogen pick-up, and reach deoxidation and remove the purpose of non-metallic inclusion.
Embodiment
The invention will be further elaborated below in conjunction with embodiment.Embodiment only is used to illustrate the present invention, rather than limits the present invention by any way.
The raw material that embodiment adopts is as follows, all is weight percentage when below relating to percentage ratio:
The chemical constitution of quickened lime: 100%＞CaO 〉=90.0%, 5% 〉=MgO＞0,2.5% 〉=SiO
2＞0, all the other are igloss and Al
2O
3, trace impurities such as P, S;
The chemical constitution of fluorite: 100%＞CaF
2〉=90%, 6% 〉=SiO
2＞0,4% 〉=A1
2O
3＞0;
The chemical constitution of calcined soda for industry: 100%＞Na
2CO
3〉=95%.
At first detect the chemical ingredients of raw material, and with the quickened lime fragmentation, granularity is not more than 5mm, cross 180 mesh sieves after the fluorite fragmentation, according to the satisfied condition of high basicity refining slag chemical component weight per-cent, calculate the weight of desired raw material again, the concrete raw material consumption of following examples sees Table 1:
The consumption of raw material among table 1 embodiment
| Raw material | Consumption (kilogram) | ||
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Quickened lime | 82 | 84 | 83 |
| Fluorite | 13 | 11 | 12 |
| Calcined soda for industry | 5 | 5 | 5 |
Embodiment 1
Take by weighing desired raw material in ratio shown in the table 1, with making high basicity refining slag behind the disk mixer mixing.The high basicity refining slag composition (weight percent) that obtains is: CaO:72.2%, SiO
2: Al 2.7%,
2O
3: Na 3.2%,
2O:2.8%, CaF
2: MgO:3.5% 11.6%,, all the other are igloss composition and trace impurities such as P, S, wherein CaO/SiO
2=26.7.
When this high basicity refining slag is used for converter smelting 20CrMoH steel, be 0.010% in the smelting endpoint molten steel sulphur content, full iron (TFe) content of smelting endpoint slag is 30.5%, CaO/SiO
2=6.0.The quantity of slag is 10kg/t under the tapping process
SteelCondition under, when beginning tapping pressed 7kg/t
SteelAmount add this high basicity refining slag and carry out wash heat, the tapping process desulfurization degree is 50%, the molten steel nitrogen increased amount is 0.00050%, formed ladle slag CaO/SiO
2=7.5, square billet S:0.005%, the T[O of casting]: 0.0010%.High about 20 percentage points of the general deslagging process of the desulfurization degree of tapping process, the molten steel nitrogen increased amount descends about 40%, the square billet of casting satisfies high-quality steel requirement, and rolling bar A, the rank that category-B is mingled with are in 1.5 grades, and the rank that C, D class are mingled with is in 1.0 grades.Do not see that materials such as ladle lining have erosion.
Embodiment 2
Take by weighing desired raw material in ratio shown in the table 1, with making high basicity refining slag behind the disk mixer mixing.The high basicity refining slag composition (weight percent) that obtains is: CaO:74.6%, SiO
2: Al 1.8%,
2O
3: Na 2.6%,
2O:2.7%, CaF
2: MgO:4.4% 9.4%,, all the other are igloss composition and trace impurities such as P, S, wherein CaO/SiO
2=41.4.
When this high basicity refining slag is used for converter smelting 20CrMoH steel, be 0.008% in the smelting endpoint molten steel sulphur content, full iron (TFe) content of smelting endpoint slag is 25.6%, CaO/SiO
2=6.1.The quantity of slag is 10kg/t under the converter tapping process
SteelCondition under, when beginning tapping pressed 7.8kg/t
SteelAmount add this high basicity refining slag and carry out wash heat, the tapping process desulfurization degree is 75%, the molten steel nitrogen increased amount is 0.00040%, formed ladle slag CaO/SiO
2=8.4, square billet S:0.002%, the T[O of casting]: 0.00090%.High about 20 percentage points of the general deslagging process of the desulfurization degree of tapping process, the molten steel nitrogen increased amount descends about 40%, the square billet of casting satisfies high-quality steel requirement, and rolling bar A, the rank that category-B is mingled with are in 1.5 grades, and the rank that C, D class are mingled with is in 1.0 grades.Do not see that materials such as ladle lining have erosion.
Embodiment 3
Take by weighing desired raw material in ratio shown in the table 1, with making high basicity refining slag behind the disk mixer mixing.The high basicity refining slag composition (weight percent) that obtains is: CaO:73.3%, SiO
2: Al 2.4%,
2O
3: Na 2.7%,
2O:2.8%, CaF
2: MgO:4.0% 10.5%,, all the other are igloss composition and trace impurities such as P, S, wherein CaO/SiO
2=30.5.
When this high basicity refining slag is used for the smelting of P510L steel converter, be 0.011% in the smelting endpoint molten steel sulphur content, full iron (TFe) content of smelting endpoint slag is 30.6%, CaO/SiO
2=4.8.Quantity of slag 9.5kg/t under the converter tapping process
SteelCondition under, when beginning tapping pressed 5.3kg/t
SteelAmount add this high basicity refining slag and carry out wash heat, the tapping process desulfurization degree is 45.5%, the molten steel nitrogen increased amount is 0.00030%, formed ladle slag CaO/SiO
2=6.4, slab S:0.006%, the T[O of casting]: 0.00170%.High about 20 percentage points of the general deslagging process of the desulfurization degree of tapping process, the molten steel nitrogen increased amount descends about 40%, and A, B, C, D class are mingled with grading and all satisfy standard-required well after the slab hot rolling of casting.Do not see that materials such as ladle lining have erosion.
Claims (8)
1. high-basicity refining slag for slag washing of revolving furnace steel-making, it is characterized in that: the moiety of described refining slag contains by weight percentage: 70.0%≤CaO≤88%, 0＜SiO
2≤ 3.0%, 0＜Al
2O
3≤ 4.5%, 2.0%≤Na
2O≤4.1%, 8.0%≤CaF
2≤ 13.3%, 0＜MgO≤5.2%.
2. high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1 is characterized in that: described refining slag dual alkalinity CaO/SiO
2〉=23.3.
3. high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1 or 2 is characterized in that: the moiety that described refining slag contains is preferably by weight percentage: 70.8%≤CaO≤85%, 0.3%≤SiO
2≤ 2.9%, 0.8%≤Al
2O
3≤ 3.9%, 2.2%≤Na
2O≤3.8%, 8.4%≤CaF
2≤ 12.9%, 0.2%≤Mg0≤4.7%, all the other are igloss composition and trace impurities such as P, S.
4. high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1 is characterized in that: the hemisphere point temperature of fusion of described refining slag: 1400～1450 ℃.
5. high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1 is characterized in that: described refining slag is made by quickened lime, fluorite and calcined soda for industry mixing in disk mixer.
6. high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1 is characterized in that: refining slag moisture content of finished products≤1.0%, granularity≤5.0mm.
7. the preparation method of a high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 1, it is characterized in that: this method is made up of following steps:
A) detect raw material: the chemical ingredients of quickened lime, fluorite, calcined soda for industry;
B) with quickened lime, fluorite fragmentation;
C) condition that satisfies according to high basicity refining slag chemical component weight per-cent, the weight of calculating desired raw material;
D) take by weighing above-mentioned raw materials mixing in disk mixer in proportion;
E) carry out weather-proof dressing.
8. the preparation method of high-basicity refining slag for slag washing of revolving furnace steel-making as claimed in claim 7, it is characterized in that: described step b) is not more than 5mm for quickened lime is crushed to granularity, crosses 180 mesh sieves after the fluorite fragmentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102019905A CN100564548C (en) | 2007-10-10 | 2007-10-10 | A kind of high-basicity refining slag for slag washing of revolving furnace steel-making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102019905A CN100564548C (en) | 2007-10-10 | 2007-10-10 | A kind of high-basicity refining slag for slag washing of revolving furnace steel-making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101139644A true CN101139644A (en) | 2008-03-12 |
| CN100564548C CN100564548C (en) | 2009-12-02 |
Family
ID=39191749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007102019905A Expired - Fee Related CN100564548C (en) | 2007-10-10 | 2007-10-10 | A kind of high-basicity refining slag for slag washing of revolving furnace steel-making |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100564548C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643822B (en) * | 2009-08-31 | 2011-12-21 | 江苏大学 | Ultrahigh basicity low aluminum fluorine-free refining slag and preparation method and use method thereof |
| CN102312053A (en) * | 2011-07-08 | 2012-01-11 | 南阳汉冶特钢有限公司 | Refining low-slag-quantity operating process |
| CN102477472A (en) * | 2010-11-25 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Mild steel desulfurization refining method |
| CN102560008A (en) * | 2012-02-23 | 2012-07-11 | 重庆大学 | Submerged arc slag for refining aluminum-containing low-silicon steel ladle and preparation method for submerged arc slag |
| CN102851441A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Slag iron separating agent for high-vanadium and titanium molten iron, and slag iron separation method thereof |
| CN103276138A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Ladle slag modification method |
| CN103898274A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Ultralow-sulfur steel smelting method |
| CN103898275A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Refining method for enhancing cleanliness of steel |
| CN104060048A (en) * | 2013-09-16 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Dephosphorization and desulfurization agent and semisteel simultaneous desulphurization and dephosphorization method |
| CN104451036A (en) * | 2014-12-30 | 2015-03-25 | 郑州维达铸造材料有限公司 | Special refining agent for melting and casting high manganese alloy steel |
| CN105219921A (en) * | 2014-06-03 | 2016-01-06 | 本钢板材股份有限公司 | A kind of novel Steel ladle modifier |
| 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 |
| CN114075619A (en) * | 2021-11-19 | 2022-02-22 | 中天钢铁集团有限公司 | Fluorine-free CaO-SiO2Slagging method of refining slag in steelmaking process |
| CN114540578A (en) * | 2022-01-28 | 2022-05-27 | 商丘市商鼎耐火材料有限公司 | Refining slag special for silicon steel molten steel and preparation method and application thereof |
| CN115821056A (en) * | 2022-09-14 | 2023-03-21 | 湖南锐异资环科技有限公司 | Method for co-processing zinc-containing ash and zinc-containing paint slag in steel plant |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014685A (en) * | 1973-11-27 | 1977-03-29 | Foseco International Limited | Manufacture of steel |
| CN1046139C (en) * | 1997-10-08 | 1999-11-03 | 冶金工业部钢铁研究总院 | Pre-dephosporizing method for molten iron |
| CN100350060C (en) * | 2006-03-08 | 2007-11-21 | 许震 | High-efficient metallurgical refiner and preparation thereof |
-
2007
- 2007-10-10 CN CNB2007102019905A patent/CN100564548C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643822B (en) * | 2009-08-31 | 2011-12-21 | 江苏大学 | Ultrahigh basicity low aluminum fluorine-free refining slag and preparation method and use method thereof |
| CN102477472A (en) * | 2010-11-25 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Mild steel desulfurization refining method |
| CN102851441A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Slag iron separating agent for high-vanadium and titanium molten iron, and slag iron separation method thereof |
| CN102312053A (en) * | 2011-07-08 | 2012-01-11 | 南阳汉冶特钢有限公司 | Refining low-slag-quantity operating process |
| CN102560008B (en) * | 2012-02-23 | 2013-10-16 | 重庆大学 | Submerged arc slag for refining aluminum-containing low-silicon steel ladle and preparation method for submerged arc slag |
| CN102560008A (en) * | 2012-02-23 | 2012-07-11 | 重庆大学 | Submerged arc slag for refining aluminum-containing low-silicon steel ladle and preparation method for submerged arc slag |
| CN103898275A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Refining method for enhancing cleanliness of steel |
| CN103898274A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Ultralow-sulfur steel smelting method |
| CN103898274B (en) * | 2012-12-28 | 2015-11-18 | 攀钢集团研究院有限公司 | A kind of ultralow-sulfur steel smelting process |
| CN103276138A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Ladle slag modification method |
| CN104060048A (en) * | 2013-09-16 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Dephosphorization and desulfurization agent and semisteel simultaneous desulphurization and dephosphorization method |
| CN105219921A (en) * | 2014-06-03 | 2016-01-06 | 本钢板材股份有限公司 | A kind of novel Steel ladle modifier |
| CN104451036A (en) * | 2014-12-30 | 2015-03-25 | 郑州维达铸造材料有限公司 | Special refining agent for melting and casting high manganese alloy steel |
| CN104451036B (en) * | 2014-12-30 | 2016-06-01 | 郑州维达铸造材料有限公司 | The special refining agent of founding high manganese steel |
| 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 |
| CN114075619A (en) * | 2021-11-19 | 2022-02-22 | 中天钢铁集团有限公司 | Fluorine-free CaO-SiO2Slagging method of refining slag in steelmaking process |
| CN114075619B (en) * | 2021-11-19 | 2022-11-29 | 中天钢铁集团有限公司 | Fluorine-free CaO-SiO 2 Slagging method of refining slag in steelmaking process |
| CN114540578A (en) * | 2022-01-28 | 2022-05-27 | 商丘市商鼎耐火材料有限公司 | Refining slag special for silicon steel molten steel and preparation method and application thereof |
| CN115821056A (en) * | 2022-09-14 | 2023-03-21 | 湖南锐异资环科技有限公司 | Method for co-processing zinc-containing ash and zinc-containing paint slag in steel plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100564548C (en) | 2009-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100564548C (en) | A kind of high-basicity refining slag for slag washing of revolving furnace steel-making | |
| CN102002556B (en) | Rare earth oxide-containing steelmaking refining slag, and preparation method and using method thereof | |
| CN101560586B (en) | Compound dephosphorization agent with converter slag as raw material and preparing method thereof | |
| CN107299181B (en) | The method of converter gasification dephosphorized slag circulation dephosphorization steel-making | |
| CN104226947B (en) | A kind of tundish covering flux used for ultra-low-carbon steel | |
| CN102586543B (en) | Steel ladle slag reducing agent with high calcium oxide content, and preparation method thereof | |
| CN101613787B (en) | Liquid steel high-efficiency composite refining agent | |
| CN101906500A (en) | Method for directly producing chrome-base alloy steel by comprehensively using calcium-free chrome slag | |
| CN101935740B (en) | White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof | |
| CN103484595B (en) | Production process of magnesian slag pressing agents | |
| CN101665858A (en) | Steel ladle slag modifier for external refining | |
| CN101113486A (en) | Melted iron desulfuration pretreatment furnace slag modifier and method for making same | |
| CN100532584C (en) | MgO base desulfurizing agent and producing method thereof | |
| CN102477472A (en) | Mild steel desulfurization refining method | |
| CN102146500A (en) | Fluxing agent for smelting steel as well as preparation and use methods thereof | |
| CN101503747B (en) | Heating steel slag washing material for converter steel melting, preparation and use method | |
| CN108220529A (en) | It is a kind of using sintering machine head end electro-precipitating dust as the desiliconization of hot metal agent of matrix | |
| CN110157860A (en) | A kind of ferrosilicon purification dealuminzation refining slag and preparation method | |
| CN101550465A (en) | Manganese-based fluxing agent for converter steelmaking and preparation method thereof | |
| CN103031409B (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN105200192A (en) | Liquid steel refining slag and preparation method and application thereof | |
| CN102652989A (en) | Tundish molten steel covering agent for high-cleanness steel pouring and preparation method and application of tundish molten steel covering agent | |
| CN101260455A (en) | Preparation of calcium-iron alloy by using calcium carbide as raw material and calcium-containing composite desoxidant | |
| CN104878161A (en) | Slag pressing agent for converter slag tank, and preparation method thereof | |
| CN106636535A (en) | Convertor steelmaking fluorine-free slag former and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20161010 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |