CN1303950A - Core-covered wire for deep-desulfurization for steel production - Google Patents
Core-covered wire for deep-desulfurization for steel production Download PDFInfo
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- CN1303950A CN1303950A CN 00100237 CN00100237A CN1303950A CN 1303950 A CN1303950 A CN 1303950A CN 00100237 CN00100237 CN 00100237 CN 00100237 A CN00100237 A CN 00100237A CN 1303950 A CN1303950 A CN 1303950A
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- desulfurization
- core
- sweetening agent
- molten steel
- steel
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A clad-core wire for deep desulfurization in steel production is comprised of sheathing and wire core, the described sheathing is a steel thin sheet and the wire core consists of desulfurizing agent. Said invented deep desulfurization clad-core wire can be used to make desulfurization treatment in molten steel, and make the desulfurizing agent easily diffuse in molten steel uniformly so that its desulfurization effect can be greatly raised, and at the same time, the dose of desulfurizing agent can be greatly reduced, and can raise high-quality steel production, its production efficiency is high and its production cost can be greatly reduced.
Description
The present invention relates to field of iron and steel smelting, especially a kind of core-covered wire for deep-desulfurization for steel production.
As everyone knows, sulphur is deleterious element in steel, and the desulfurization of molten steel is one of underlying condition of production high-quality steel and high added value steel.Compete very fierce today numerous and confused doctor negative new steel grade of exploitation of each Steel Plant and high added value steel in the steel market.Traditional deep desulfuration method has two kinds, and the first directly adds ladle with blocky sweetening agent, makes molten steel and sweetening agent contact reacts reach the purpose of desulfurization.One slag blanket is arranged above the molten steel in ladle, block sweetening agent is dropped into ladle, the stopping of slag blanket that it can be subjected on the molten steel surface, influence the diffusion of sweetening agent in molten steel, simultaneously, sink to sweetening agent piece in the molten steel in molten steel, spread also compare slow.So adopting this method that molten steel is carried out desulfurization at present needs the long time, general sweetening process was wanted more than 40 minutes.Simultaneously, because the diffusion effect of sweetening agent in molten steel is bad, sweetening effectiveness is also just poor, in order to reduce the sulphur content in the steel, will strengthen the addition of sweetening agent.The method of another kind of dark desulfurization is that the method by winding-up directly is blown into molten steel inside with the sweetening agent powder, with the slag blanket that reduces molten steel surface to the diffusional resistance of sweetening agent with improve the velocity of diffusion of sweetening agent in molten steel.But, the enforcement of this method, need steel mill at first to invest the valuable blowing device of a cover, in addition, in the process of blowing desulfurization agent, the phenomenon that sweetening agent stops up blowing device often takes place in using the molten steel of blowing method in ladle, desulfurization is handled can't be carried out, thereby cause putting in order the stove steel number of changing or scrapping, make the production efficiency reduction even cause great financial loss.
Also there are some defectives in existing sweetening agent on forming.At present, the general sweetening agent that adopts is lime (CaO)+fluorite (CaF
2), fluorite is used for reducing the lime fusing point and reduces the molten steel slag viscosity.But because of fluorite etch ladle liner, make that the proportioning of fluorite is lower, like this, just influenced the effect of fluorite lime, and the fusing point height of lime, dissolution rate is slow in molten steel, and its kinetics of diffusion condition is relatively poor, thereby has influenced sweetening effectiveness.
The objective of the invention is to improve the deficiencies in the prior art, provide a kind of in dark desulfurization sweetening effectiveness good, the dark desulfurization cored-wire that cost is low, easy to use.
For achieving the above object, the present invention takes following design:
This cored-wire is made up of crust and core, and described crust is a sheetmetal, and described core is made of sweetening agent, and it includes CaO, CaCO
3And CaF
2The effect of CaO wherein is and molten steel reaction desulfuration, CaF
2Effect be the fusing point that reduces the granularity of slag in the molten steel and reduce CaO, make its dissolving rapidly in molten steel, the desulfurization with reaction of Salmon-Saxl in the molten steel, CaCO
3Under the high temperature action of molten steel, resolve into CaO and CO
2, CO wherein
2Play the effect that adds the strong mixing molten steel.In existing sweetening agent prescription, generally do not use CaF
2, its reason is in the operation of the block sweetening agent of existing direct adding, some sweetening agent piece sinks in the molten steel, and bulk still in heaps at the bottom of ladle, like this, CaF in this regional area
2Concentration relatively very high, and CaF
2Ladle liner there is very strong corrodibility, so, in existing sulfur method in the prescription of sweetening agent as add too much CaF
2, easily make ladle bottom or slag line etch serious, even ladle bleed-out accident occurs.The present invention carries out desulfurization with cored-wire, sweetening agent is evenly distributed on has avoided occurring high local concentrations CaF in the molten steel
2Contact with the direct of cylinder-packing, thus less to the influence of cylinder-packing, and in sweetening agent, increased CaF
2Content, can improve the sweetening effectiveness of sweetening agent.Better for the sweetening effectiveness that makes this sweetening agent, can also add the Ca-Si alloy therein, select to be to use Ca28Si60, Ca31Si60 or Ca24Si60 preferably.The adding of Ca-Si alloy both can improve the sweetening effectiveness of CaO, and can improve the form of steel inclusion and the quantity of minimizing inclusion.
The prescription preferably of the core in this dark desulfurization cored-wire is as follows: (content wherein is weight percentage)
CaO 75-88
CaF
2 6-14
CaCO
3 2-10
Ca-Si alloy 1-4
When using dark desulfurization cored-wire provided by the invention that molten steel in the ladle is carried out the desulfurization processing, use the existing wire feeder that in molten steel, adds alloying element to insert this cored-wire in the molten steel apace, the sheetmetal of cored-wire outside can prevent that one from entering just fusing of molten steel, makes its interior sweetening agent can only be added in the top layer of molten steel.Under the insertion speed that is fit to, this cored-wire can be inserted into the bottom of ladle, wire feeder is constantly carried this cored-wire in ladle, add sweetening agent equably on each aspect of molten steel that just can be in ladle, pulverous sweetening agent can be evenly distributed in molten steel in a short period of time in the cored-wire, carries out desulphurization reaction.
The desulfurization of using this dark desulfurization cored-wire to carry out molten steel is handled, sweetening agent is added on each aspect of molten steel, and it is easy to spread in molten steel, so, sweetening effectiveness improves significantly than with existing method desulfurization, the consumption of sweetening agent but significantly reduces simultaneously, desulfurization time shortens greatly, originally the molten steel that needed desulfurization to handle 40 minutes, can shorten to 20 minutes after using this dark desulfurization cored-wire, the sulphur content in the steel is reduced to 10ppm from original 100ppm, and uses this cored-wire, the consumption of sweetening agent but is original half, and 4 yuan of/ton steel thus can reduce cost.This shows that the present invention can improve desulfurization degree, guarantee the production of high-quality steel, boost productivity, reduce cost, and can be used for remedying of the high offscale molten steel of sulphur.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the structural representation in cored-wire of the present invention cross section
Embodiment 1:
As shown in Figure 1, this cored-wire is made up of crust 1 and core 2, and crust 1 is a sheetmetal, and core 2 is made of Powdered sweetening agent, and it is by CaO, CaCO
3, CaF
2With the Ca28Si60 alloy composition.The prescription of sweetening agent is as follows: (content wherein is weight percentage)
CaO 81.5
CaF
2 10
CaCO
3 6
Ca28Si60 2.5
Embodiment 2:
As embodiment 1 described cored-wire, the prescription of sweetening agent of wherein forming core is as follows: (content wherein is weight percentage)
CaO 80
CaF
2 10
CaCO
3 8
Ca31Si60 2
Embodiment 3:
As embodiment 1 described cored-wire, the prescription of sweetening agent of wherein forming core is as follows: (content wherein is weight percentage)
CaO 87
CaF
2 8
CaCO
3 4
Ca24Si60 1
Claims (8)
1, a kind of core-covered wire for deep-desulfurization for steel production is made up of crust and core, it is characterized in that: described crust is a sheetmetal, and described core is made of sweetening agent, and it includes CaO, CaCO
3And CaF
2
2, core-covered wire for deep-desulfurization for steel production according to claim 1 is characterized in that: also have the Ca-Si alloy in the described sweetening agent.
3, core-covered wire for deep-desulfurization for steel production according to claim 2 is characterized in that: the prescription of described sweetening agent is as follows: (content wherein is weight percentage)
CaO 75-88
CaF
2 6-14
CaCO
3 2-10
Ca-Si alloy 1-4
4, according to claim 2 or 3 described core-covered wire for deep-desulfurization for steel production, it is characterized in that: described Ca-Si alloy is Ca28Si60 or Ca31Si60 or Ca24Si60.
5, core-covered wire for deep-desulfurization for steel production according to claim 4 is characterized in that: the prescription of described sweetening agent is as follows: (content wherein is weight percentage)
CaO 81.5
CaF
2 10
CaCO
3 6
Ca28Si60 2.5
6, core-covered wire for deep-desulfurization for steel production according to claim 4 is characterized in that: the prescription of described sweetening agent is as follows: (content wherein is weight percentage)
CaO 80
CaF
2 10
CaCO
3 8
Ca31Si60 2
7, core-covered wire for deep-desulfurization for steel production according to claim 4 is characterized in that: the prescription of described sweetening agent is as follows: (content wherein is weight percentage)
CaO 87
CaF
2 8
CaCO
3 4
Ca24Si60 1
8, according to claim 1 or 2 or 3 described core-covered wire for deep-desulfurization for steel production, it is characterized in that: described sweetening agent is Powdered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00100237 CN1129672C (en) | 2000-01-10 | 2000-01-10 | Core-covered wire for deep-desulfurization for steel production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00100237 CN1129672C (en) | 2000-01-10 | 2000-01-10 | Core-covered wire for deep-desulfurization for steel production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1303950A true CN1303950A (en) | 2001-07-18 |
| CN1129672C CN1129672C (en) | 2003-12-03 |
Family
ID=4575333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00100237 Expired - Fee Related CN1129672C (en) | 2000-01-10 | 2000-01-10 | Core-covered wire for deep-desulfurization for steel production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1129672C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404412C (en) * | 2006-05-26 | 2008-07-23 | 李光明 | Method for producing feed grade dicalcium phosphate |
| CN103146881A (en) * | 2013-03-01 | 2013-06-12 | 莱芜钢铁集团有限公司 | Core-spun yarn for treating compound calcium |
| CN101993979B (en) * | 2009-08-10 | 2013-10-16 | 鞍钢股份有限公司 | Premelted composite refining slag for producing ultra-low sulfur steel |
| KR20140070086A (en) * | 2012-11-30 | 2014-06-10 | 인젝션 알로이스 리미티드 | Wire for refining molten metal and associated method of manufacture |
| CN108384921A (en) * | 2018-01-31 | 2018-08-10 | 日照钢铁控股集团有限公司 | A kind of ladle refining lime stone core-spun yarn and its application method |
-
2000
- 2000-01-10 CN CN 00100237 patent/CN1129672C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404412C (en) * | 2006-05-26 | 2008-07-23 | 李光明 | Method for producing feed grade dicalcium phosphate |
| CN101993979B (en) * | 2009-08-10 | 2013-10-16 | 鞍钢股份有限公司 | Premelted composite refining slag for producing ultra-low sulfur steel |
| KR20140070086A (en) * | 2012-11-30 | 2014-06-10 | 인젝션 알로이스 리미티드 | Wire for refining molten metal and associated method of manufacture |
| KR102069387B1 (en) * | 2012-11-30 | 2020-01-22 | 인젝션 알로이스 리미티드 | Wire for refining molten metal and associated method of manufacture |
| CN103146881A (en) * | 2013-03-01 | 2013-06-12 | 莱芜钢铁集团有限公司 | Core-spun yarn for treating compound calcium |
| CN103146881B (en) * | 2013-03-01 | 2015-03-18 | 莱芜钢铁集团有限公司 | Core-spun yarn for treating compound calcium |
| CN108384921A (en) * | 2018-01-31 | 2018-08-10 | 日照钢铁控股集团有限公司 | A kind of ladle refining lime stone core-spun yarn and its application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1129672C (en) | 2003-12-03 |
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