CN1084894A - Purification of molten steel heating line feeding purifying method and purification heating cored-wire - Google Patents
Purification of molten steel heating line feeding purifying method and purification heating cored-wire Download PDFInfo
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- CN1084894A CN1084894A CN 92111170 CN92111170A CN1084894A CN 1084894 A CN1084894 A CN 1084894A CN 92111170 CN92111170 CN 92111170 CN 92111170 A CN92111170 A CN 92111170A CN 1084894 A CN1084894 A CN 1084894A
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Abstract
The present invention is a kind of purification of molten steel heating line feeding purifying method (LT method) and purifies heating cored-wire (LT-H line), is used for molten steel furnace external refining.This invention is main heats molten steel with generate heat main cored-wire (LT-H main line) and the auxiliary material fine setting secondary cored-wire of molten steel composition (LT-H by-pass) purification of special purification, reaches the refining purpose.The present invention not only solved purification of molten steel, heating, intensification, temperature adjustment, guaranteed the continuous casting ordinary production, and improved continuous caster throughput and improved slab quality, and reduces tapping temperature, shortens smelting cycle, improves furnace life, reduces raw materials consumption.
Description
The invention belongs to a kind of special purification heating cored-wire (being called for short the LT-H line) molten steel is carried out external refining method (being called for short the LT method).
Molten steel furnace external refining is the important means that improves steel quality and guarantee the continuous caster ordinary production.Heating, temperature adjustment, purify hot metal are again the keys of continuous casting production external refining.The molten steel of ladle and tundish adds heat refining and mainly contains two types: the one, and the electrically heated purifying method is as electric induction furnace, LF stove, plasma heating.Though electrical heating method is a mature technology, slow, electricity and consumption of electrode is higher, ladle life is lower heats up.Chemical heat purifying method besides is as CAS-OB method, ANS-OB method and IR-UT method.This method is to drop into aluminium block or ferrosilicon in molten steel, and oxidizing reaction is facilitated in oxygen blast, produce chemical heat and improve liquid steel temperature, blowing argon gas is got rid of and is mingled with, but it is ripe that it is used on large-scale steel melting furnace and the big section continuous caster, and be used in cost is raise, and wayward to producing sour molten aluminium in the oxidizing reaction, make ladle nozzle dross and the quality that worsens steel easily.As heating with ferrosilicon, thermo-efficiency is low and cause basicity to descend, and rephosphorization occurs and returns sulphur and ladle life is reduced.In addition, existing line feeding refining, its line feeding is to do foreskin with cold rolled strip, with CaSi and CaC
2For raw material is formed cored-wire.Though this cored-wire can be adjusted steel quality, purification of molten steel is heated up, easily cause tapping temperature higher, increase energy consumption, furnace life and reduce, can not solve medium and small steel mill and press for the thermoregulated problem of the outer heating of molten steel stove.In a word, the outer molten steel of medium and small up to now steel mill's stove heats refining techniques is not still had desirable scheme.
Purpose of the present invention is paid cored-wire (LT-H pays line) with regard to providing generate heat main cored-wire (LT-H main line) and auxiliary material fine setting molten steel composition of a kind of new purification of molten steel, and purifies the external refining method (being called for short the LT method) of heating molten steel with this.With main cored-wire and the molten steel of paying the cored-wire external refining not only be purified, heat, intensification, temperature adjustment, and also can adjust the composition of molten steel with pair cored-wire.
Technical essential of the present invention is: purification heating main cored-wire (LT-H main line) and fine setting molten steel composition are paid cored-wire (LT-H pays line), do foreskin with aluminium strip respectively, raw materials such as ferrosilicon, calcium powder, Silcaz, sial Ca-Fe alloy, silico-calcium barium-ferrum alloy, ferromanganese, fluorite, rare earth element, powdered carbon, coke powder, pitch, magnesium powder are formed the series alloy powder on request, then with required alloy powder respectively winding up be pressed into to be processed in the aluminium strip and purify the series product that the main cored-wire of heating and fine setting molten steel composition are paid cored-wire.More than the composition proportioning of various raw materials, decide according to the variety and quality of external refining steel.A main cored-wire and a pair cored-wire composition see Table 1.
Table 1
| The composition classification | Al% | Si% | Ca% | Mg% | Mn% | CaF2 % | C% | Remarks |
| The LT-H main line | 30～60 | 40～20 | 25～15 | 1～3 | 1～3 | ≥3 | －－ | Can form series product on request |
| LT-H pays line | ≥60 | ≥60 | ≥50 | Also can make up respectively on request |
Purification of molten steel heating line feeding purifying method (LT method) is that molten steel is poured in ladle or the tundish, and the thermometric of at first taking a sample heats up according to molten steel institute heat requirement then and requires to feed main cored-wire and oxygen blast gas and argon gas.The strict steel grade of branch if hope for success is then fed according to demand and is paid composition and the quality that cored-wire is adjusted molten steel.Line feeding quantity and speed, oxygen and the argon gas amount of being blown into and time are all adjusted by the PLC system control of a multi-functional feeding wire machine on demand.
Characteristics of the present invention are, pay cored-wire and purify the outer refined molten steel of process furnace with generate heat main cored-wire and fine setting molten steel composition of special purification.Carry out chemical heat release with oxygen behind the main cored-wire feeding molten steel, and form Al
2O
3And SiO
2With pay auxiliary material in the cored-wire react form LMP, high cohesion, macrobead rapidly, easily the sial calcium of come-up is synthetic slag wash heat agent, it has not only got rid of sour molten aluminium harm and nozzle clogging, also plays desulfurization of molten steel deslagging dephosphorizing and eliminating and is mingled with effect.The auxiliary material of paying in the cored-wire can be the quality of molten steel and Composition Control at optimum range.Because purifying the heating cored-wire can generate heat, can make the interior molten steel heating of bag up to more than 50 ℃, solved that the molten steel stove heats temperature adjustment outward in the steelmaking-refining-continuous casting production, avoided the invar water temp on the low side cause to return stove and change water the die casting phenomenon, improved continuous casting billet quality and continuous casting productivity; Also can reduce about 20 ℃ of tapping temperatures in addition, therefore can shorten smelting cycle, improve furnace life, reduce refractory consumption rate, make cost reduce about 3～5 yuan of/ton steel.
Concrete enforcement of the present invention is as follows: the aluminium strip (general thickness 0.3～1mm) of making all size as requested, then ferrosilicon, calcium powder, Silcaz, sial Ca-Fe alloy, silico-calcium barium-ferrum alloy, ferromanganese, fluorite, rare earth element, powdered carbon, coke powder, pitch, magnesium powder etc., make the alloy powder on request, respectively alloy powder winding up is pressed into then and is processed in the aluminium strip that series purifies the main cored-wire of heating and auxiliary material fine setting molten steel composition is paid cored-wire.
Purification of molten steel heating line feeding purifying method (LT method) is that molten steel is poured in the bag, and sampling, thermometric are fed main cored-wire, oxygen blast, Argon then earlier, requires to feed auxiliary material fine setting molten steel composition according to steel quality again and pays cored-wire, and molten steel is sent to continuous casting after reaching requirement.
Generate heat main cored-wire and auxiliary material fine setting molten steel composition of purification of the present invention paid cored-wire and also can be made bulk.
Claims (4)
1, a kind of purification of molten steel heating line feeding purifying method (LT method) and purification heating cored-wire.It is characterized in that: purification of molten steel heating is to rely on the molten steel feeding to purify heating main cored-wire (LT-H main line) and auxiliary material and finely tune molten steel composition and pay cored-wire (LT-H pays line), and join oxygen blast, Argon is carried out.Purifying the main cored-wire of heating and assisting material fine setting molten steel composition to pay cored-wire is to make foreskin with aluminium strip; Be respectively that preparation of raw material becomes the material powder with ferrosilicon, calcium powder, Silcaz, sial Ca-Fe alloy, silico-calcium barium-ferrum alloy, ferromanganese, fluorite, rare earth element, carbon dust, coke powder, pitch, magnesium powder; Then the two volume is pressed and be processed into serial wire rod.
2, as claim 1) described purification of molten steel heating line feeding purifying method (LT method), it is characterized in that feeding and purify the main cored-wire of heating and auxiliary material fine setting molten steel composition is paid cored-wire, and cooperate oxygen blast, Argon to molten steel.
3, as claim 1) generate heat main cored-wire and auxiliary material fine setting molten steel composition of described purification pay cored-wire and it is characterized in that making foreskin with aluminium strip is pressed into serial wire rod, its composition such as table 1 with the alloy raw material volume that is mixed with.
Table 1
Composition % kind
Al
Si
Ca
Mg
Mn
CaF2
C
Remarks
The LT-H main line
30～60
20～40
15～25
1～3
1～3
〉=3
Can form series on request.
LT-H pays line
〉=60
〉=60
〉=50
Also can make up respectively on request.
4, as claim 1) described purification heating foreskin aluminium strip and the alloy material that purifies heating also can be made into bulk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92111170 CN1084894A (en) | 1992-09-29 | 1992-09-29 | Purification of molten steel heating line feeding purifying method and purification heating cored-wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92111170 CN1084894A (en) | 1992-09-29 | 1992-09-29 | Purification of molten steel heating line feeding purifying method and purification heating cored-wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1084894A true CN1084894A (en) | 1994-04-06 |
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ID=4945196
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92111170 Pending CN1084894A (en) | 1992-09-29 | 1992-09-29 | Purification of molten steel heating line feeding purifying method and purification heating cored-wire |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332042C (en) * | 2005-11-28 | 2007-08-15 | 左生华 | Aluminium-rare-earth core-spun yarn |
| CN101111324B (en) * | 2005-01-28 | 2010-09-22 | 注射器合金香港有限公司 | Wire for refining molten metal and associated method of manufacture |
| CN102676739A (en) * | 2012-05-07 | 2012-09-19 | 上海盛宝冶金科技有限公司 | Seamless aluminum-containing core spun yarn |
| CN104073591A (en) * | 2014-06-27 | 2014-10-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire and method for titanium alloying of liquid steel |
| CN104073595A (en) * | 2014-06-27 | 2014-10-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire and method for titanium alloying of liquid steel |
| CN108085461A (en) * | 2017-12-28 | 2018-05-29 | 新乡市新兴冶金材料有限公司 | A kind of silico-calcium carbon core-spun yarn |
| CN109880960A (en) * | 2019-04-10 | 2019-06-14 | 鞍钢实业集团有限公司原燃料生产服务分公司 | A kind of environment-friendly type slag modifier and preparation method thereof |
-
1992
- 1992-09-29 CN CN 92111170 patent/CN1084894A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111324B (en) * | 2005-01-28 | 2010-09-22 | 注射器合金香港有限公司 | Wire for refining molten metal and associated method of manufacture |
| US9200349B2 (en) | 2005-01-28 | 2015-12-01 | Injection Alloys Limited | Wire for refining molten metal and associated method of manufacture |
| CN1332042C (en) * | 2005-11-28 | 2007-08-15 | 左生华 | Aluminium-rare-earth core-spun yarn |
| CN102676739A (en) * | 2012-05-07 | 2012-09-19 | 上海盛宝冶金科技有限公司 | Seamless aluminum-containing core spun yarn |
| CN104073591A (en) * | 2014-06-27 | 2014-10-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire and method for titanium alloying of liquid steel |
| CN104073595A (en) * | 2014-06-27 | 2014-10-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Cored wire and method for titanium alloying of liquid steel |
| CN104073595B (en) * | 2014-06-27 | 2016-02-17 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of cored-wire and the titanium alloyed method of molten steel |
| CN104073591B (en) * | 2014-06-27 | 2016-02-17 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of cored-wire and the titanium alloyed method of molten steel |
| CN108085461A (en) * | 2017-12-28 | 2018-05-29 | 新乡市新兴冶金材料有限公司 | A kind of silico-calcium carbon core-spun yarn |
| CN109880960A (en) * | 2019-04-10 | 2019-06-14 | 鞍钢实业集团有限公司原燃料生产服务分公司 | A kind of environment-friendly type slag modifier and preparation method thereof |
| CN109880960B (en) * | 2019-04-10 | 2021-06-22 | 鞍钢实业集团有限公司原燃料生产服务分公司 | Environment-friendly slag modifier and preparation method thereof |
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