CN101148687A - Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization - Google Patents
Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization Download PDFInfo
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- CN101148687A CN101148687A CNA2007102020781A CN200710202078A CN101148687A CN 101148687 A CN101148687 A CN 101148687A CN A2007102020781 A CNA2007102020781 A CN A2007102020781A CN 200710202078 A CN200710202078 A CN 200710202078A CN 101148687 A CN101148687 A CN 101148687A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention is desulfurizing and slag regulating agent for molten vanadium-titanium iron, and belongs to the field of ferrous metallurgy. The desulfurizing and slag regulating agent consists of CaO 55-70 weight portions, SiO2 7-15 weight portions, expandable graphite 1-6 weight portions, MnO 2-10 weight portions, MgO 2-10 weight portions, CaC2 1-20 weight portions, CaF2 1-4 weight portions and Al2O3 1-5 weight portions. The desulfurizing and slag regulating agent of the present invention has high desulfurizing slag eliminating rate, capacity of reducing the sulfur content from 0.035-0.120 % to about 0.005 %, lowered iron loss and broad application foreground.
Description
Technical field
The present invention relates to a kind of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent, belong to the ferrous metallurgy field.
Background technology
When smelting vanadium titano-magnetite, when the vanadium titano-magnetite proportioning of blast furnace surpasses 15%, the TiO of slag
2After content＞5%, the sweetening power that can to produce an outstanding problem be slag sharply descends, and causes the sulphur content of the pig iron sharply to raise, and therefore to smelting the molten iron that vanadium titano-magnetite obtained, secondary desulfurization is one of main task of hot metal pretreatment.The now magnesium desulfurizers that adopt of vanadium-titanium-iron-water secondary desulfurization as adopting lime, calcium carbide, the MAGNESIUM METAL host as sweetening agent, as auxiliary, are formed lime base, calcium carbide base and magnesium base composite desulfurizing agent with Wingdale, fluorite, coke powder respectively more.Vanadium-titanium-iron-water is because its singularity adopts in the magnesium desulfurizer sweetening process carbon in Ti and the molten iron and carrier gas N in secondary desulfurization
2Reaction generates the carbonitride of titanium, and its fusing point is very high and make the slag thickness that becomes, and causes desulphurization and slag skimming process iron loss to increase, and the desulfurization slag clearance is low, and making desulphurised hot metal go into steel melting furnace, to return sulphur serious.
Up to the present, do not see the relevant report that the vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent is arranged, do not see that more it has industrial application.
Summary of the invention
The object of the present invention is to provide a kind of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent, after the solution vanadium-titanium-iron-water adopted the magnesium desulfurization technology, steel melting furnace returned the serious problem of sulphur.
To achieve these goals, the present invention adopts following technical scheme:
The vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent, it is to be prepared from by the following weight proportion raw material: 55～70 parts of CaO, SiO
27～15 parts, 1～6 part of expanded graphite, 2～10 parts of 2～10 parts of MnO, MgO, CaC
21～20 part, CaF
21～4 part, Al
2O
31～5 part.
Further, the raw material weight proportion optimization of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent is: 58～70 parts of CaO, SiO
27～11 parts, 1.9～4 parts of expanded graphites, 2～4 parts of 2.8～9 parts of MnO, MgO, CaC
24～7 parts, CaF
21.6～3 parts, Al
2O
31～5 part.
CaO, Al among the present invention
2O
3, expanded graphite, SiO
2, MnO, MgO, CaC
2, CaF
2Together form a slag system, play the effect that reduces slag melting point, viscosity, promote slag iron to separate, thereby play the purpose that reduces the iron level in the slag.
The preparation method of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention is: a, with the raw material separated pulverizing; B, the raw material blending after will pulverizing are promptly.Whole process is carried out under protection against the tide, water proof environment.Granularity is more little after the raw material pulverizing, and the residue adjustment effect is good more, and preferably, the granularity behind the step a raw material separated pulverizing is no more than 10mm smaller or equal to 1mm and maximum particle size more than 80%.
The using method of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention is as follows:
Before desulfurization slag supplying agent is added in the iron ladle, the amount that general 130 tons iron ladle adds slag supplying agent is 150～200kg.
Vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention, improved the desulfurization slag clearance greatly, the average sulfur content that returns behind the desulfurizing iron of original sulphur content 0.035%～0.120% can be controlled at about 0.005%, iron loss reduces more than 0.5%, has broad application prospects.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described, does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1
With 70 parts in lime, 3 parts in fluorite, 9 parts of manganese ores, 4 parts of expanded graphites, 7 parts on calcium carbide, 11 parts in glass powder, 3 parts of separated pulverizing of MgO, further be crushed to each raw material granularity with Raymond mill then and be no more than 10mm smaller or equal to 1mm and maximum particle size more than 80%, last mixing makes vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention.
The above-mentioned vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent that makes contains CaO 64.8% after measured, contains CaF
22.55%, contain MnO4.3%, contain expanded graphite 3.8%, contain SiO
28.1%, contain CaC
24.7%, contain MgO 3.2%, contain Al
2O
3(contain Al in the manganese ore
2O
3) 3.2%.
Embodiment 2
The slag supplying agent of embodiment 1 preparation is tested climbing steel vanadium extraction steelworks, slag supplying agent add-on 200kg/ stove, about 130 tons of every stove molten iron, each stove is numbered 1,2,3,4,5.Test-results sees Table 2, and Mg, lime are sweetening agent in the table.
Stove [S]/% is gone in steel-making: molten iron is gone into the initial sulphur content of steel melting furnace.
Steel-making catch carbon [S]/%: steel-making catch carbon sampling sulphur content.
Go into stove～time [S]/% after taking off: the initial sulphur content of stove is gone in steel-making and desulfurization finishes the sulphur content difference, and this value is more little, and desulfurization slag removes clean more, and it is good more that time sulphur is controlled effect.
Catch carbon～return [S]/% after taking off: steel-making catch carbon sampling sulphur content and desulfurization finish the sulphur content difference, and this value is more little, and desulfurization slag removes clean more, and time sulphur control effect is good more.
Table 1 slag supplying agent test-results
Adopt as can be seen from Table 1 that the mean content of sulfur of molten iron is 0.006% behind the vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention, adopt molten iron behind the vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention to go into stove～take off the back to return [S]/% average out to 0.0032% (big production data 0.00375%), and prior art does not add the molten iron of slag supplying agent and go into stove～take off the back to return [S]/% average out to 0.0073%; Adopt molten iron catch carbon behind the vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention～take off the back to return [S]/% average out to 0.0053% (big production data 0.00573%), and prior art does not add molten iron catch carbon～time [S]/% average out to 0.013% after taking off of slag supplying agent, as seen vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent of the present invention returns sulfur content after can reducing desulfurizing iron greatly, has broad application prospects.
Claims (4)
1. the vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent is characterized in that it is to be prepared from by the following weight proportion raw material: 55～70 parts of CaO, SiO
27～15 parts, 1～6 part of expanded graphite, 2～10 parts of 2～10 parts of MnO, MgO, CaC
21～20 part, CaF
21～4 part, Al
2O
31～5 part.
2. vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent according to claim 1 is characterized in that it is to be prepared from by the following weight proportion raw material: 58～70 parts of CaO, SiO
27～11 parts, 1.9～4 parts of expanded graphites, 2～4 parts of 2.8～9 parts of MnO, MgO, CaC
24～7 parts, CaF
21.6～3 parts, Al
2O
31～5 part.
3. the preparation method of claim 1 or 2 described vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agents comprises the steps:
A, with the raw material separated pulverizing;
B, the raw material blending after will pulverizing are promptly.
4. the preparation method of vanadium-titanium-iron-water-magnesium desulfurization special-purpose slag adjusting agent according to claim 3 is characterized in that: among the step a with the raw material separated pulverizing until the granularity of each raw material more than 80%≤1mm, and maximum particle size is no more than 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102020781A CN100529111C (en) | 2007-10-16 | 2007-10-16 | Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102020781A CN100529111C (en) | 2007-10-16 | 2007-10-16 | Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101148687A true CN101148687A (en) | 2008-03-26 |
| CN100529111C CN100529111C (en) | 2009-08-19 |
Family
ID=39249383
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007102020781A Expired - Fee Related CN100529111C (en) | 2007-10-16 | 2007-10-16 | Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061346A (en) * | 2011-01-14 | 2011-05-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving metallurgical property of vanadium-titanium blast furnace 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 |
| US8523977B2 (en) | 2011-01-14 | 2013-09-03 | Nucor Corporation | Method of desulfurizing steel |
| CN108707723A (en) * | 2018-04-12 | 2018-10-26 | 万杨知为 | Steel-making quick slag material and its production method |
| CN112481448A (en) * | 2020-12-11 | 2021-03-12 | 四川德胜集团钒钛有限公司 | Vanadium-titanium molten iron desulfurizer and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062019C (en) * | 1998-02-24 | 2001-02-14 | 宝山钢铁(集团)公司 | Desulfurizing slag modifier |
| CN100436604C (en) * | 2006-02-27 | 2008-11-26 | 沈阳东北大学冶金技术研究所 | Passivated composite desulfurizing powder and preparing method |
| CN101016577A (en) * | 2007-02-15 | 2007-08-15 | 沈阳东北大学冶金技术研究所有限公司 | Passivation composite desulfurization powder |
-
2007
- 2007-10-16 CN CNB2007102020781A patent/CN100529111C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061346A (en) * | 2011-01-14 | 2011-05-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving metallurgical property of vanadium-titanium blast furnace slag |
| US8523977B2 (en) | 2011-01-14 | 2013-09-03 | Nucor Corporation | Method of desulfurizing steel |
| 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 |
| CN108707723A (en) * | 2018-04-12 | 2018-10-26 | 万杨知为 | Steel-making quick slag material and its production method |
| CN112481448A (en) * | 2020-12-11 | 2021-03-12 | 四川德胜集团钒钛有限公司 | Vanadium-titanium molten iron desulfurizer and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100529111C (en) | 2009-08-19 |
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Owner name: PANGANG GROUP STEEL VANADIUM + TITANIUM CO., LTD. Free format text: FORMER NAME: PANZHIHUA NEW STEEL + VANADIUM CO., LTD. |
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Address after: 617067 science and Technology Department, Pangang village, Xiangyang Village, East District, Panzhihua, Sichuan Co-patentee after: Panzhihua Shunteng Group Metallurgical Materials Co., Ltd. Patentee after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Address before: 617067 science and Technology Department, Pangang village, Xiangyang Village, East District, Panzhihua, Sichuan Co-patentee before: Panzhihua Shunteng Group Metallurgical Materials Co., Ltd. Patentee before: Panzhihua New Steel & Vanadium Co., Ltd. |
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