CN101845536B - Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof - Google Patents
Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof Download PDFInfo
- Publication number
- CN101845536B CN101845536B CN2010101743111A CN201010174311A CN101845536B CN 101845536 B CN101845536 B CN 101845536B CN 2010101743111 A CN2010101743111 A CN 2010101743111A CN 201010174311 A CN201010174311 A CN 201010174311A CN 101845536 B CN101845536 B CN 101845536B
- Authority
- CN
- China
- Prior art keywords
- waste residue
- refining waste
- stove refining
- quickened lime
- granularity
- 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.)
- Expired - Fee Related
Links
Abstract
The invention discloses a composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and a preparation method thereof. The composite molten steel slag washing agent consists of 65 to 95% of LF refining slag, 10 to 30% of active lime and 5 to 15% of industrial soda. The LF refining slag is composed of 50 to 60% of CaO, 25 to 35% of Al2O3, 4 to 8% of SiO2, 4 to 7% of MgO, 0.5 to 1.0% of MnO and FeO, 0.005 to 0.02% of P2O5, and 0.01 to 0.3% of S; the active lime includes 90 to 94% of CaO, and HCl with activity of 350 to 380 ml/4N and granularity of 0.5 to 3.0 mm; and the industrial soda includes 99.2% of Na2CO3 with granularity of 0.5 to 1.0 mm. The preparation method comprises the following steps of: processing the LF refining slag and the active lime into the powder with the granularity of 0.5 to 3.00 mm; uniformly mixing and stirring the materials according to the percentage, dry-pressing and moulding the materials with granularity of 25 to 35 mm and applying the waterproof packaging to the materials. On the condition that the adding quantity is 4 to 6 kg/t, the desulfurization rate of the invention achieves more than 30%, the reduction rate of the total oxygen content is more than 25% and the qualified rate of the thermal top forge is improved from 80% to 95%, so that the invention realizes the resource recycling of the LF refining waste slag and is beneficial to the energy-saving and emission reduction of the iron and steel enterprises.
Description
Technical field
The invention belongs to the subsidiary material that use in the metallurgy industry steelmaking process, relate to the molten steel composite slag lotion that a kind of conduct absorption deoxidation type inclusion that adds uses in the converter tapping process, a kind of specifically molten steel composite slag lotion based on LF stove refining waste residue and preparation method thereof in ladle.
Background technology
The steel secondary refining Technology comprises that mainly accurately control and vacuum decarburization, the degassing, inclusion floating such as separate at core technology for pushing off the slag tapping, synthetic wash heat, slag upgrading, white slag refining and line feeding and steel inclusion morphology Control, liquid steel temperature, composition, wherein synthetic wash heat is the technology that is most widely used in the steel secondary refining technology, the main metallurgical function is an absorption deoxidation products (inclusion), thereby reaches the purpose of cleaning molten steel.
The tradition slag system mainly is CaO-SiO
2-CaF
2Slag system and CaO-CaF
2-Al
2O
3Slag system, SiO on the one hand
2The content height increases silicon and oxygenation easily, unfavorable raising molten steel cleanliness factor; Simultaneously, because CaF
2Existence, the anti-material erosive velocity of ladle is fast, contaminate environment should not adopt.The synthetic refining slag of traditional calcium aluminate then adopts the method for stove high temperature fritting to obtain energy consumption and cost height.
(title: with the LF refinery scum is the converter fluxing medium of raw material and production method thereof, number of patent application: the disclosed technical scheme of application documents 200710159128.2) shows the LF refinery scum is used for the converter steelmaking fusing assistant, but yet there are no report as the wash heat agent that adds in the converter tapping process in ladle Chinese invention patent.Name is called: molten steel refining agent and preparation method, number of patent application be 200710052744.8 Chinese invention patent application documents disclosed molten steel refining agent by ladle furnace refining waste residue, CaO and Al
2O
3Miscellany and binding agent (magnesium chloride solution) are formed, and the preparation method puts into process furnace then and heated 1.5～3 hours under 600 ℃～900 ℃ conditions for granulating behind above-mentioned each component uniform mixing, the back naturally cooling of coming out of the stove.This patent is the refining slag under what condition except there not being clear and definite ladle furnace refining waste residue, one-tenth be grouped into the preparation method on not scientific and reasonable yet.
Summary of the invention
Technical problem to be solved by this invention is: at the defective of above prior art existence, a kind of molten steel composite slag lotion based on LF stove refining waste residue and preparation method thereof is proposed, can adsorb deoxidation products and the sulphur of sloughing in the molten steel, utilize LF furnace refining slag waste material, realized the recycling of LF stove refining waste residue.
The technical scheme that the present invention solves above technical problem is:
Based on the molten steel composite slag lotion of LF stove refining waste residue, to form by LF stove refining waste residue, quickened lime and industrial soda, the weight percent of described each component is: LF stove refining waste residue 65～85%, quickened lime 10～30%, industrial soda 5～15%; LF stove refining waste residue percentage by weight comprises following component: CaO 50～60%, Al
2O
325～35%, SiO
24～8%, MgO 4～7%, MnO+FeO0.5～1.0%, P
2O
50.005～0.02%, S 0.01～0.3%; CaO content is 90～94% in the quickened lime; Na in the industrial soda
2CO
3Content is 99.2%.
Preparation method based on the molten steel composite slag lotion of LF stove refining waste residue, at first granularity being processed in the fragmentation of LF stove refining waste residue is 0.5～3.0mm, it is 0.5～3.0mm that granularity is processed in the quickened lime fragmentation, it is 0.5～1.0mm that granularity is processed in the industrial soda fragmentation, with LF stove refining waste residue, quickened lime and industrial soda in the described ratio mixing of claim 1, adopt dry-pressing formed method to make the ball that granularity is 25～35mm then, end product adopts weather-proof dressing.
As optimized technical scheme of the present invention:
LF stove refining waste residue granularity 0.5～3.0mm; Quickened lime granularity 0.5～3.0mm, quickened lime activity degree 350～380ml/4N-HCl; Industrial soda granularity 0.5～1.0mm.
The weight percent of LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 74%, and quickened lime: 17%, industrial soda: 9%; LF stove refining waste residue comprises following component: CaO:57%, Al by weight percentage
2O
3: 31%, SiO
2: 6%, MgO:5%, MnO+FeO:0.8%, P
2O
5: 0.02%, S:0.18%; Quickened lime comprises following component: CaO:93%, SiO by weight percentage
2: 5%, MgO:2%.
The weight percent of LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 65%, and quickened lime: 30%, industrial soda: 5%; LF stove refining waste residue comprises following component: CaO:50%, Al by weight percentage
2O
3: 35%, SiO
2: 8%, MgO:6%, MnO+FeO:0.7%, P
2O
5: 0.01%, S:0.29%; Quickened lime comprises following component: CaO:94%, SiO by weight percentage
2: 3%, MgO:3%.
The weight percent of LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 85%, and quickened lime: 10%, industrial soda: 5%; LF stove refining waste residue comprises following component: CaO:60%, Al by weight percentage
2O
3: 25%, SiO
2: 7%, MgO:7%, MnO+FeO:0.74%, P
2O
5: 0.01%, S:0.25%; Quickened lime comprises following component: CaO:90%, SiO by weight percentage
2: 6%, MgO:4%.
Molten steel composite slag lotion of the present invention, add or add the positive effect that ladle bottom is mixed by molten steel to dash, play desulfurization, go to be mingled with wash heat with steel stream, desulfurization degree can reach more than 30%, oxide inclusion can be effectively controlled in the steel, and the whole oxygen amount reduced rate is greater than 25%.This is to handling without the LF stove, and only the molten steel of handling through the Ar station is particularly important, and the heat top is forged qualification rate and can be brought up to 95% by 80%.
Molten steel composite slag lotion of the present invention and preparation method thereof is to be base-material to reclaim LF stove refining waste residue, add a certain proportion of quickened lime and soda, adopt dry-pressing formed method to make the ball of certain particle size, in the converter tapping process, add in the ladle, play absorption deoxidation products SiO
2, Al
2O
3With the effect of sloughing sulphur in the molten steel; In addition,, realized the recycling of LF stove refining waste residue, met the development need of iron and steel enterprise's energy-saving and emission-reduction and recycling economy because the basic raw material of molten steel composite slag lotion is the LF furnace refining slag waste material that utilizes iron and steel enterprise inside.
The present invention compares with traditional wash heat agent (also claiming synthetic slag, refining agent), owing to adopt low SiO
2The CaO-Al of content (less than 8%)
2O
3-SiO
2Slag system, i.e. calcium aluminate slag system, this slag system not only has high sulfur capacity, and has strong absorption Al
2O
3, SiO
2The ability of deoxidation products.The present invention utilizes the LF stove refining waste residue (CaO+Al of iron and steel enterprise inside
2O
3Be 75～90% calcium aluminate) as the basic raw material of wash heat agent,, realized the recycle of LF furnace refining slag adding under a certain amount of quickened lime and the soda condition.
From the preparation method; patent of the present invention is mixed LF furnace refining slag powder with lime powder and industrial soda powder (or claiming calcined soda for industry); adopt dry-pressing formed method; without high-temperature heating treatment; moisture content is less than 0.5%; help preventing that molten steel from increasing hydrogen, in use also do not have flue dust simultaneously and fly upward, help environment protection.
The present invention has following characteristics with respect to prior art: (1) molten steel composite slag lotion base slag adopts the calcium aluminate slag system, and this slag system not only has high sulfur capacity, and has strong absorption Al
2O
3, SiO
2The ability of deoxidation products; Simultaneously, the quickened lime of interpolation has the ability of desulfurization on the one hand, can also with deoxidation products Al
2O
3Form and the approaching low melting point calcium aluminate compound of basic slag ingredient; In addition, the industrial soda decomposes of interpolation forms Na
2O and CO
2Gas, Na
2The further reinforcing desulfuration of O, and CO
2Gas is strengthened molten steel and is stirred, and improves the dynamic conditions of chemical reaction and absorption deoxidation products.(2) adopt the LF stove refining waste residue of iron and steel enterprise inside as the calcium aluminate slag of molten steel composite slag lotion base slag, realized the recycling of LF stove refining waste residue, meet the development need of iron and steel enterprise's energy-saving and emission-reduction and recycling economy.(3) molten steel composite slag lotion preparation adopts dry-pressing formed method, and without high-temperature heating treatment, moisture content helps preventing that less than 0.5% molten steel from increasing hydrogen, does not in use also have flue dust simultaneously and flies upward, and helps environment protection.(4) molten steel composite slag lotion is particularly suitable for highquality carbon steel and produces cheaply, give full play to the effect of the synthetic wash heat of molten steel in the ladle in the converter tapping process under the condition of LF stove refining treatment, realizes Clean Steel production cheaply.
Embodiment
Embodiment one
The weight percent of LF stove refining waste residue, quickened lime and the industrial soda of present embodiment is: LF stove refining waste residue: 74%, and quickened lime: 17%, industrial soda: 9%.
LF stove refining waste residue comprises following component: CaO:57%, Al by weight percentage
2O
3: 31%, SiO
2: 6%, MgO:5%, MnO+FeO:0.8%, P
2O
5: 0.02%, S:0.18%.
Quickened lime comprises following component: CaO:93%, SiO by weight percentage
2: 5%, MgO:2%.
LF stove refining waste residue granularity 0.5mm; Quickened lime granularity 0.5mm, quickened lime activity degree 350ml/4N-HCl; Industrial soda granularity 0.5mm.
The preparation method based on the molten steel composite slag lotion of LF stove refining waste residue of present embodiment, at first granularity being processed in the fragmentation of LF stove refining waste residue is 0.5mm, it is 0.5mm that granularity is processed in the quickened lime fragmentation, it is 0.5mm that granularity is processed in the industrial soda fragmentation, with LF stove refining waste residue, quickened lime and industrial soda in above ratio mixing, adopt dry-pressing formed method to make the ball that granularity is 25mm then, end product adopts weather-proof dressing.
The molten steel composite slag lotion of present embodiment, mixed by molten steel with adding of steel stream or adding ladle bottom dashes, play desulfurization, remove to be mingled with the positive effect of wash heat, desulfurization degree can reach 36%, oxide inclusion can be effectively controlled in the steel, whole oxygen amount reduced rate 30%, the heat top is forged qualification rate and is brought up to 95% by 80%.Add-on is the 4Kg/t steel.
Embodiment two
The weight percent of LF stove refining waste residue, quickened lime and the industrial soda of present embodiment is: LF stove refining waste residue: 65%, and quickened lime: 30%, industrial soda: 5%.
LF stove refining waste residue comprises following component: CaO:50%, Al by weight percentage
2O
3: 35%, SiO
2: 8%, MgO:6%, MnO+FeO:0.7%, P
2O
5: 0.01%, S:0.29%.
Quickened lime comprises following component: CaO:94%, SiO by weight percentage
2: 3%, MgO 3%.
LF stove refining waste residue granularity 2.0mm; Quickened lime granularity 2.0mm, quickened lime activity degree 360ml/4N-HCl; Industrial soda granularity 0.8mm.
The preparation method based on the molten steel composite slag lotion of LF stove refining waste residue of present embodiment, at first granularity being processed in the fragmentation of LF stove refining waste residue is 2.0mm, it is 2.0mm that granularity is processed in the quickened lime fragmentation, it is 0.8mm that granularity is processed in the industrial soda fragmentation, with LF stove refining waste residue, quickened lime and industrial soda in the described ratio mixing of claim 1, adopt dry-pressing formed method to make the ball that granularity is 30mm then, end product adopts weather-proof dressing.
The molten steel composite slag lotion of present embodiment, mixed by molten steel with adding of steel stream or adding ladle bottom dashes, play desulfurization, remove to be mingled with the positive effect of wash heat, desulfurization degree can reach 40%, oxide inclusion can be effectively controlled in the steel, whole oxygen amount reduced rate 35%, the heat top is forged qualification rate and is brought up to 95% by 80%.Add-on is the 5Kg/t steel.
Embodiment three
The weight percent of LF stove refining waste residue, quickened lime and the industrial soda of present embodiment is: LF stove refining waste residue: 85%, and quickened lime: 10%, industrial soda: 5%.
LF stove refining waste residue comprises following component: CaO:60%, Al by weight percentage
2O
3: 25%, SiO
2: 7%, MgO:7%, MnO+FeO:0.74%, P
2O
5: 0.01%, S:0.25%.
Quickened lime comprises following component: CaO:90%, SiO by weight percentage
2: 6%, MgO:4%.
LF stove refining waste residue granularity 3.0mm; Quickened lime granularity 3.0mm, quickened lime activity degree 380ml/4N-HCl; Industrial soda granularity 1.0mm.
The preparation method based on the molten steel composite slag lotion of LF stove refining waste residue of present embodiment, at first granularity being processed in the fragmentation of LF stove refining waste residue is 3.0mm, it is 3.0mm that granularity is processed in the quickened lime fragmentation, it is 1.0mm that granularity is processed in the industrial soda fragmentation, with LF stove refining waste residue, quickened lime and industrial soda in the described ratio mixing of claim 1, adopt dry-pressing formed method to make the ball that granularity is 35mm then, end product adopts weather-proof dressing.
The molten steel composite slag lotion of present embodiment, mixed by molten steel with adding of steel stream or adding ladle bottom dashes, play desulfurization, remove to be mingled with the positive effect of wash heat, desulfurization degree can reach 38%, oxide inclusion can be effectively controlled in the steel, whole oxygen amount reduced rate 35%, the heat top is forged qualification rate and is brought up to 95% by 80%.Add-on is the 6Kg/t steel.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (6)
1. based on the molten steel composite slag lotion of LF stove refining waste residue, it is characterized in that:
Be made up of LF stove refining waste residue, quickened lime and industrial soda, the weight percent of described each component is:
LF stove refining waste residue 65～85%
Quickened lime 10～30%
Industrial soda 5～15%;
Described LF stove refining waste residue comprises following component by weight percentage:
CaO content is 90～94% in the described quickened lime;
Na in the described industrial soda
2CO
3Content is 99.2%.
2. the molten steel composite slag lotion based on LF stove refining waste residue as claimed in claim 1 is characterized in that: described LF stove refining waste residue granularity 0.5～3.0mm; Described quickened lime granularity 0.5～3.0mm, described quickened lime activity degree 350～380mL/4N-HCl; Described industrial soda granularity 0.5～1.0mm.
3. the molten steel composite slag lotion based on LF stove refining waste residue as claimed in claim 1 or 2, it is characterized in that: the weight percent of described LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 74%, quickened lime: 17%, industrial soda: 9%; Described LF stove refining waste residue comprises following component: CaO:57%, Al by weight percentage
2O
3: 31%, SiO
2: 6%, MgO:5%, MnO+FeO:O.8%, P
2O
5: 0.02%, S:0.18%; Described quickened lime comprises following component: CaO:93%, SiO by weight percentage
2: 5%, MgO:2%.
4. the molten steel composite slag lotion based on LF stove refining waste residue as claimed in claim 1 or 2, it is characterized in that: the weight percent of described LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 65%, quickened lime: 30%, industrial soda: 5%; Described LF stove refining waste residue comprises following component: CaO:50%, Al by weight percentage
2O
3: 35%, SiO
2: 8%, MgO:6%, MnO+FeO:0.7%, P
2O
5: 0.01%, S:0.29%; Described quickened lime comprises following component: CaO:94%, SiO by weight percentage
2: 3%, MgO:3%.
5. the molten steel composite slag lotion based on LF stove refining waste residue as claimed in claim 1 or 2, it is characterized in that: the weight percent of described LF stove refining waste residue, quickened lime and industrial soda is: LF stove refining waste residue: 85%, quickened lime: 10%, industrial soda: 5%; Described LF stove refining waste residue comprises following component: CaO:60%, Al by weight percentage
2O
3: 25%, SiO
2: 7%, MgO:7%, MnO+FeO:0.74%, P
2O
5: 0.01%, S:0.25%; Described quickened lime comprises following component: CaO:90%, SiO by weight percentage
2: 6%, MgO:4%.
6. according to claim 1 based on the preparation method of the molten steel composite slag lotion of LF stove refining waste residue, it is characterized in that: at first granularity being processed in the fragmentation of LF stove refining waste residue is 0.5～3.0mm, it is 0.5～3.0mm that granularity is processed in the quickened lime fragmentation, it is 0.5～1.0mm that granularity is processed in the industrial soda fragmentation, with LF stove refining waste residue, quickened lime and industrial soda in the described ratio mixing of claim 1, adopt dry-pressing formed method to make the ball that granularity is 25～35mm then, end product adopts weather-proof dressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101743111A CN101845536B (en) | 2010-05-18 | 2010-05-18 | Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101743111A CN101845536B (en) | 2010-05-18 | 2010-05-18 | Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101845536A CN101845536A (en) | 2010-09-29 |
| CN101845536B true CN101845536B (en) | 2011-12-21 |
Family
ID=42770354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101743111A Expired - Fee Related CN101845536B (en) | 2010-05-18 | 2010-05-18 | Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101845536B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071279B (en) * | 2010-12-21 | 2012-09-26 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320573B (en) * | 2012-03-23 | 2015-07-22 | 宝山钢铁股份有限公司 | Application of desulfurized injection residues of LF furnace and thermal insulating agent prepared by desulfurization injection residues of LF furnace |
| CN102851453B (en) * | 2012-10-09 | 2014-08-06 | 莱芜钢铁集团有限公司 | Composite refining slag for special-shaped blank molten steel smelting, and preparation method and application thereof |
| CN103333994B (en) * | 2013-04-03 | 2014-07-23 | 新疆八一钢铁股份有限公司 | Production technology of LF refinement submerged arc deoxidizing slag |
| PL2975140T3 (en) | 2014-06-04 | 2020-01-31 | Ecofirm S.R.O. | The method of recycling of secondary slag in the primary smelting of iron |
| CN109628698A (en) * | 2019-01-10 | 2019-04-16 | 鞍钢股份有限公司 | A kind of pipe line steel fritting refining desulfuration slag and preparation method thereof |
| CN110453044A (en) * | 2019-08-14 | 2019-11-15 | 上海盛宝冶金科技有限公司 | A kind of method of preparation and use of furnace steel refining slag |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089199A (en) * | 2007-07-16 | 2007-12-19 | 武汉钢铁(集团)公司 | Molten steel refining agent and preparation method |
| CN101463406A (en) * | 2007-12-20 | 2009-06-24 | 鞍山钢铁集团公司 | Converter fluxing medium with LF refinery cinder as raw material and production method thereof |
-
2010
- 2010-05-18 CN CN2010101743111A patent/CN101845536B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089199A (en) * | 2007-07-16 | 2007-12-19 | 武汉钢铁(集团)公司 | Molten steel refining agent and preparation method |
| CN101463406A (en) * | 2007-12-20 | 2009-06-24 | 鞍山钢铁集团公司 | Converter fluxing medium with LF refinery cinder as raw material and production method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 汪春雷等.转炉冶炼船板钢渣洗工艺的开发研究.《北京科技大学学报》.2007,第29卷(第Z1期),69-72. * |
| 王谦等.低碳含铝钢LF炉精炼工艺及精炼渣的优化.《北京科技大学学报》.2007,第29卷(第Z1期),14-17. * |
| 马杰等.转炉出钢渣洗脱硫的理论研究与工业试验.《钢铁研究》.2009,第37卷(第2期),23-26. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071279B (en) * | 2010-12-21 | 2012-09-26 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101845536A (en) | 2010-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101845536B (en) | Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof | |
| CN101343680B (en) | Metallurgy type refining slag special for ladle and manufacture method thereof | |
| CN1229506C (en) | Melted iron dephosphorization agent using vessel slag as raw material | |
| CN100467621C (en) | Molten steel refining agent and preparation method | |
| CN102206729A (en) | Method for recycling steel slag of LF (Low Frequency) furnace | |
| CN102787204B (en) | Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof | |
| CN103498016A (en) | Dephosphorization agent prepared by taking slag of decarbonization furnace as raw material and molten iron dephosphorization method | |
| CN105506226A (en) | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank | |
| CN100494413C (en) | Melted iron desulfuration pretreatment furnace slag modifier and method for making same | |
| CN102787214A (en) | Ladle furnace refining fluoride-free pre-melted slags, preparation method and using method | |
| CN101353711B (en) | Carbonaceous material block molten iron bath reduction ironmaking desulphurization method | |
| CN114657326B (en) | Dephosphorization agent and application thereof | |
| CN105132630B (en) | It is a kind of to be used for electric furnace, composite slag lotion of converter and preparation method thereof | |
| CN101818229A (en) | Foamed dephosphorization pellet and preparation method thereof | |
| CN102107265B (en) | Ladle covering flux and use method thereof | |
| CN106337101A (en) | Calcium series top slag modification agent and application method thereof | |
| CN1157486C (en) | SYnthetic slag for reducing oxygen and sulfur content in molten steel and its slag making method | |
| CN107574284A (en) | It is a kind of using metallurgical waste as the hot-metal insulating agent of raw material and its manufacture, application method | |
| CN103627852A (en) | Heat-preserving agent for molten iron and smelting method of vanadium-titanium-bearing iron ores | |
| CN104294008A (en) | Hot metal desulfurization agent and application | |
| CN102888482A (en) | Premelting type slagging and dephosphorizing agent with 2CaO.Fe2O3 and CaO.Fe2O3 serving as main phases | |
| CN109880957B (en) | Molten iron pretreatment composite desiliconizing and dephosphorizing agent and preparation method thereof | |
| CN103789494A (en) | Preparation method of compound steelmaking refining agent | |
| CN103667583A (en) | Preparation method of slag forming agent for steelmaking | |
| CN103642992B (en) | Slag forming constituent for steelmaking |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20190518 |