CN102653811A - Method for deoxidization and alloying by using ferro-silico-manganese alloy - Google Patents
Method for deoxidization and alloying by using ferro-silico-manganese alloy Download PDFInfo
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- CN102653811A CN102653811A CN2012101386876A CN201210138687A CN102653811A CN 102653811 A CN102653811 A CN 102653811A CN 2012101386876 A CN2012101386876 A CN 2012101386876A CN 201210138687 A CN201210138687 A CN 201210138687A CN 102653811 A CN102653811 A CN 102653811A
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Abstract
The invention relates to a method for deoxidization and alloying by using a ferro-silico-manganese alloy. The method comprises the following steps of: firstly detecting the content of dissolved oxygen in a converter, taking 600-1300ppm as the end point of the converter when the content of dissolved oxygen in the converter is blown to 600-1300ppm, secondly adding the ferro-silico-manganese alloy to a steel ladle, stopping adding the ferro-silico-manganese alloy when the content of dissolved oxygen in the steel ladle reaches 100-300ppm, and thirdly inputting aluminium wires to the steel ladle by utilizing a wire feeding machine and stopping inputting the aluminium wires when the content of dissolved oxygen in the steel ladle reaches 15-35ppm, thus obtaining the smelted steel. The method has the following beneficial effects: silicon contained in the ferro-silico-manganese alloy in the molten steel is removed by utilizing the high content of the dissolved oxygen; and as the ferro-silico-manganese alloy is cheaper than the medium ferro-manganese alloys, the cost of smelting low-silicon and low-carbon steel can be lowered by adopting the method.
Description
Technical field
the present invention relates to a kind of method of using the ferro-silico-manganese deoxidation alloying.
Background technology
In the process of
converter smelting low-silicon low-carbon steel, need to carry out deoxidation and alloying, make that the mass percent of each Chemical Composition reaches following requirement in the molten steel: carbon≤0.10% molten steel; Silicon≤0.03%; Phosphorus≤0.02%, sulphur≤0.03, manganese 0.35-0.60%.Therefrom can find out, in above-mentioned steel grade, because the content of silicon is quite low; So; In the prior art, the alloy of deoxidation and alloying avoids adopting the material that contains silicon, adopts the material as deoxidation and alloying such as aluminium manganese titanium, aluminium manganese calcium, aluminum steel and mid-carbon fe-mn usually.Though the material of mentioned kind has the performance of deoxidation alloying, because the aluminum content of aluminium manganese titanium, aluminium manganese calcium and aluminum steel is higher, at the material that in molten steel, no matter adds that a kind of deoxidation and alloying; After aluminium wherein and the oxygen in the molten steel react; All generate more a large amount of aluminium sesquioxides, and the aluminium sesquioxide viscosity is bigger, is difficult for from molten steel, floating getting in the slag; It is trapped in the molten steel and promptly the refining program is impacted, and also can influence molten steel simultaneously and when cast, flow smoothly; Though described mid-carbon fe-mn does not contain a large amount of aluminium, also can adjust the composition range that steel interalloy constituent content reaches institute's steelmaking kind specification, its cost is high especially, and then improves the cost of smelting steel.
silicon is reductor the most basic in the steel, when smelting ordinary steel, adopts silicon as reductor usually.Being called the mass percent that proposes this ferrosilicon Chemical Composition in " a kind of si-Mn deoxidized steel refining deoxidation alloying is with ferrosilicon and method of use thereof " like Chinese patent 101993978A number disclosed name is: silicon greater than 96% with micro-aluminium, phosphorus, sulphur, nitrogen, all the other are the deoxidation alloying material of iron.Its meaning is aluminium and the nitrogen that reduces after wanting to utilize ferrosilicon to the steel liquid deoxidation alloying in the steel.Because the content of silicon is quite high in the ferrosilicon, though it can be used as the ideal reductor, silicon can keep higher content in steel; And the silicone content height can reduce the plasticity and the toughness of steel; So this kind reductor reaches and only is suitable for smelting ordinary steel, is not suitable for smelting the low-silicon low-carbon steel grade; In the ferrosilicon method of use that this patent proposed, adding ferrosilicon for the first time is molten steel composition to be measured in 10-20 minute in the refining beginning of LF stove, adds ferrosilicon according to the amount of hanging down 0.02-0.06% than the target value of molten steel silicone content then; Measure molten steel composition once more when adding for the second time ferrosilicon and be before the refining of LF stove finishes 10-20 minute, add ferrosilicon once more and make the molten steel silicone content reach target value ± 0.01%.From LF stove smelting technology aspect, because of the LF stove is a kind of ladle refining furnace, it is mainly contributed is to adopt steel ladle bottom argon blowing to make molten steel obtain agitating function; Just help inclusion floating in the molten steel; It is less relatively that dissolved oxygen in it reaches content, if add too much ferrosilicon, the silicone content in the molten steel will increase; So just propose in this application to use target value that the method for ferrosilicon can make silicone content in the molten steel ± 0.01%, the target value of its silicon can not be≤0.03% low carbon low silicon steel grade.
Summary of the invention
task of the present invention provides a kind of mode with oxygen silica removal reasonable operation and solves the method that the high inclusion of smelting cost is difficult for the use ferro-silico-manganese deoxidation alloying of problems such as come-up.
The method of the use ferro-silico-manganese deoxidation alloying that
are proposed by the invention may further comprise the steps: at first detect the dissolved oxygen content in the converter; When the dissolved oxygen content in the converter is blown 600-1300ppm as converter terminal; In ladle, tap on one side by converter then, to ladle in add ferro-silico-manganese on one side, after converter has gone out steel; And the dissolved oxygen content in the ladle stops to add ferro-silico-manganese when reaching 100-300ppm; Utilize wire feeder in ladle, to import aluminum steel again, when the dissolved oxygen content in the ladle reaches 15-35ppm, stop to import aluminum steel, be the smelting steel grade.Ppm wherein is meant the milligram number of every liter of contained dissolved oxygen of molten steel.If the dissolved oxygen content in the converter is lower than 600ppm, be difficult for removing the silicon in the ferro-silico-manganese in the molten steel, if the dissolved oxygen content in the converter greater than 1300ppm, deoxidation is difficulty very.
said ferro-silico-manganese comprises following mass percent chemical ingredients: silicon 15-20%, and manganese 55-65%, surplus is an iron.Ferro-silico-manganese can improve the manganese content in the molten steel, and owing to the obvious effect of manganese to oxidisability, manganese content is high, and oxygen content in steel can reduce; In addition, adopt silicon and manganese deoxidation, formed deoxidation products has the pure silicon dioxide of solid phase and the MnOSi02 of liquid phase; Sosoloid MnO-FeO, these oxide compound deoxidations are very easily floated, and very easily remove oxygen content in steel.
said ferro-silico-manganese comprises following mass percent chemical ingredients: silicon is 15-17%, manganese 60-63%, and surplus is an iron.
method of ferro-silico-manganese deoxidation alloying of utilizing proposed by the invention utilizes the content of high-solubility oxygen to remove the contained silicon of ferro-silico-manganese in the molten steel, and this converter aerobic operation can be removed the silicon in the ferro-silico-manganese effectively; Simultaneously, because of the middle relatively manganeseirom price of ferro-silico-manganese is very low, so the method for this kind deoxidation alloying can reduce the cost of smelting the low-silicon low-carbon steel; In addition, owing to do not contain aluminium in the ferro-silico-manganese, so, adding ferro-silico-manganese in the molten steel and can not generate aluminium sesquioxide, the interior inclusion of molten steel very easily floats, and can not impact the refining program.
Embodiment:
Embodiment 1:
Dissolved oxygen folding content in the converter is at first detected in
in the process of producing low-carbon low-silicon steel (H08 series of products), when the dissolved oxygen content in the converter is blown 600-1300ppm, can be used as converter terminal; The dissolved oxygen content optimal selection is in the converter: 600-800ppm; Then the molten steel in the converter is outputed in the ladle, and converter is added ferro-silico-manganese simultaneously in the process of molten steel output in ladle; After molten steel all is input in the ladle in converter; When reaching 100-300ppm, stop in it, to add ferro-silico-manganese, utilize wire feeder in ladle, to import aluminum steel then like the dissolved oxygen content in the ladle; Usually at 1 meter aluminum steel of input in ladle; Dissolved oxygen in the ladle will reduce 1ppm, when the dissolved oxygen content in the ladle reaches 15-35ppm, stops to import aluminum steel, is the low carbon low silicon steel grade of being smelted.
above-mentioned ferro-silico-manganese can adopt following mass percent chemical ingredients: silicon 15%, manganese 65%, iron 20%.
Embodiment 2:
present embodiment utilizes the method for ferro-silico-manganese deoxidation alloying identical with embodiment 1, and different is that ferro-silico-manganese can adopt following mass percent chemical ingredients: silicon 20%, manganese 55%, iron 25%.
Embodiment 3:
present embodiment utilizes the method for ferro-silico-manganese deoxidation alloying identical with embodiment 1, and different is that ferro-silico-manganese can adopt following mass percent chemical ingredients: silicon 17%, manganese 62%, iron 21%.
Embodiment 4:
present embodiment utilizes the method for ferro-silico-manganese deoxidation alloying identical with embodiment 1, and different is that ferro-silico-manganese can adopt following mass percent chemical ingredients: silicon is 16%, manganese 63%, iron 21%.
Claims (3)
1. use the method for ferro-silico-manganese deoxidation alloying; It is characterized in that may further comprise the steps: at first detect the dissolved oxygen content in the converter, when the dissolved oxygen content in the converter is blown 600-1300ppm,, in ladle, tap on one side by converter then as converter terminal; In ladle, add ferro-silico-manganese on one side; After converter has gone out steel, and the dissolved oxygen content in the ladle stops to add ferro-silico-manganese when reaching 100-300ppm, utilizes wire feeder in ladle, to import aluminum steel again; When the dissolved oxygen content in the ladle reaches 15-35ppm, stop to import aluminum steel, be the smelting steel grade.
2. method according to claim 1, is characterized in that: said ferro-silico-manganese comprises following mass percent chemical ingredients: silicon 15-20%, manganese 55-65%, surplus is an iron.
3. method according to claim 1, is characterized in that: said ferro-silico-manganese comprises following mass percent chemical ingredients: silicon is 15-17%, manganese 60-63%, surplus is an iron.
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| CN2012101386876A CN102653811A (en) | 2012-05-07 | 2012-05-07 | Method for deoxidization and alloying by using ferro-silico-manganese alloy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667852A (en) * | 2013-11-14 | 2014-03-26 | 安徽省宁国市宁沪钢球有限公司 | Chrome-silicon content control method of chrome-containing steel ball |
| CN104630616A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Silicon-manganese-iron alloy |
| CN105385808A (en) * | 2015-11-11 | 2016-03-09 | 武汉钢铁(集团)公司 | Method for controlling titanium content in smelted high-magnetic-strength oriented silicon steel to be lower than or equal to 20 ppm |
| CN106702087A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | Deoxidation process for H08 steel-grade silicon |
| CN106702086A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | SWRY11 type steel carbon deoxidation technology |
| CN106929633A (en) * | 2017-04-06 | 2017-07-07 | 攀钢集团西昌钢钒有限公司 | A kind of smelting process of ultra-low-carbon steel |
| CN107794329A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | A kind of method that converter produces low silicon aluminium killed steel using Si system alloy deoxidation |
| CN110343806A (en) * | 2018-04-02 | 2019-10-18 | 潍坊特钢集团有限公司 | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique |
| CN110484681A (en) * | 2018-03-27 | 2019-11-22 | 上海梅山钢铁股份有限公司 | A kind of production method of low carbon low silicon aluminium killed steel water |
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| CN102212755A (en) * | 2011-04-29 | 2011-10-12 | 山东蒙凌工程机械股份有限公司 | Low-alloy cast steel and application thereof in heavy lorry axle housing, raw materials and machining process |
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| CN101191173A (en) * | 2006-11-21 | 2008-06-04 | 鞍钢股份有限公司 | Method for smelting low-silicon high-manganese steel |
| CN101550469A (en) * | 2008-04-05 | 2009-10-07 | 廖辉明 | Operating method for using low- or mediate-silico-manganese ferroalloy in process of temperature-adjusting deoxidation alloying for steel-making |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667852A (en) * | 2013-11-14 | 2014-03-26 | 安徽省宁国市宁沪钢球有限公司 | Chrome-silicon content control method of chrome-containing steel ball |
| CN104630616A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Silicon-manganese-iron alloy |
| CN105385808A (en) * | 2015-11-11 | 2016-03-09 | 武汉钢铁(集团)公司 | Method for controlling titanium content in smelted high-magnetic-strength oriented silicon steel to be lower than or equal to 20 ppm |
| CN105385808B (en) * | 2015-11-11 | 2018-08-07 | 武汉钢铁有限公司 | The control method of Ti content≤20ppm in a kind of smelting high magnetic induction grain-oriented silicon steel |
| CN107794329A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | A kind of method that converter produces low silicon aluminium killed steel using Si system alloy deoxidation |
| CN106702087A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | Deoxidation process for H08 steel-grade silicon |
| CN106702086A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | SWRY11 type steel carbon deoxidation technology |
| CN106929633A (en) * | 2017-04-06 | 2017-07-07 | 攀钢集团西昌钢钒有限公司 | A kind of smelting process of ultra-low-carbon steel |
| CN106929633B (en) * | 2017-04-06 | 2019-01-04 | 攀钢集团西昌钢钒有限公司 | A kind of smelting process of ultra-low-carbon steel |
| CN110484681A (en) * | 2018-03-27 | 2019-11-22 | 上海梅山钢铁股份有限公司 | A kind of production method of low carbon low silicon aluminium killed steel water |
| CN110343806A (en) * | 2018-04-02 | 2019-10-18 | 潍坊特钢集团有限公司 | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique |
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Application publication date: 20120905 |