CN103571997B - Magnesium base complex deoxidization alloy and deoxidation in steel making method - Google Patents
Magnesium base complex deoxidization alloy and deoxidation in steel making method Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 53
- 239000000956 alloy Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009628 steelmaking Methods 0.000 title claims abstract description 29
- 239000011777 magnesium Substances 0.000 title claims abstract description 28
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 22
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 239000011575 calcium Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 6
- 239000011701 zinc Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 Al: 1-6wt% Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- RRTQFNGJENAXJJ-UHFFFAOYSA-N cerium magnesium Chemical compound [Mg].[Ce] RRTQFNGJENAXJJ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- 230000003628 erosive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
技术领域technical field
本发明属于炼钢脱氧技术领域，具体来讲，涉及一种镁基复合脱氧合金以及一种使用该脱氧合金的炼钢脱氧方法。The invention belongs to the technical field of steelmaking deoxidation, and specifically relates to a magnesium-based composite deoxidation alloy and a steelmaking deoxidation method using the deoxidation alloy.
背景技术Background technique
通常，在炼钢过程中，脱氧是利用脱氧元素降低钢液氧含量的过程，包括与氧有强亲和力的脱氧元素和氧发生的脱氧反应及反应过程中产生的脱氧产物的上浮和排除。钢中氧含量的高低直接影响到最终钢材的质量和性能。高的氧含量会导致在钢液冷凝过程中，由于碳和氧偏析浓聚，将使碳再次发生氧化，使钢中产生气泡，而影响到钢材的质量；另外，氧还会以FeO、Fe3O4及其它氧化物形式析出，分布于晶界表面上，使钢的塑性、机械性能下降，并产生热脆、冷脆，对特殊用途钢的产品质量带来一系列的危害。Usually, in the steelmaking process, deoxidation is the process of using deoxidizing elements to reduce the oxygen content of molten steel, including the deoxidation reaction between deoxidizing elements with strong affinity for oxygen and oxygen, and the floating and removal of deoxidized products generated during the reaction. The level of oxygen content in steel directly affects the quality and performance of the final steel. High oxygen content will lead to the segregation and concentration of carbon and oxygen in the process of molten steel condensation, which will cause carbon to oxidize again, causing bubbles in the steel, which will affect the quality of the steel; in addition, oxygen will also form FeO, Fe 3 O 4 and other oxides are precipitated and distributed on the surface of the grain boundary, which reduces the plasticity and mechanical properties of the steel, and produces hot and cold brittleness, which brings a series of hazards to the product quality of special-purpose steel.
现代炼钢生产中，常用脱氧方法主要有三种：扩散脱氧、真空脱氧和沉淀脱氧。由于铝具有脱氧能力强、效率高、夹杂物上浮速度快、残留于钢中能细化晶粒等优点，所以铝作为脱氧剂在炼钢生产中一直占有重要的角色。但是，用铝脱氧亦存在一些问题：铝的密度小，致使铝在钢液中烧损严重，利用率较低；铝脱氧后生成高熔点的A12O3夹杂物引起连铸水口结瘤，导致连铸中断；铝脱氧生成的A12O3夹杂物一旦残留在钢中将对钢材的横向力学性能产生不良影响；铝资源日益贫乏，致使铝价格高，从而使炼钢成本提高。In modern steelmaking production, there are three main deoxidation methods commonly used: diffusion deoxidation, vacuum deoxidation and precipitation deoxidation. Because aluminum has the advantages of strong deoxidation ability, high efficiency, fast inclusion floating speed, and grain refinement when remaining in steel, aluminum has always played an important role as a deoxidizer in steelmaking production. However, there are also some problems in deoxidation with aluminum: the density of aluminum is small, which causes serious burning loss of aluminum in molten steel, and the utilization rate is low; after deoxidation of aluminum, A1 2 O 3 inclusions with high melting point are generated, causing nodules in the continuous casting nozzle, It leads to the interruption of continuous casting; once the A1 2 O 3 inclusions generated by aluminum deoxidation remain in the steel, it will have a negative impact on the transverse mechanical properties of the steel; the increasingly scarce aluminum resources lead to high aluminum prices, thereby increasing the cost of steelmaking.
而常用的钙处理技术虽然可以使A12O3和Mns夹杂物变性，有效地解决了连铸水口结瘤，并生成了对钢质量危害相对较小的铝酸钙和CaS夹杂物，而且钙处理对钢的组织和性能也有一定的改善。但钙处理技术也带来一些不利的问题：钙处理不当容易使水口的侵蚀速度加快，并导致钢水污染；铝酸钙熔点低并容易聚集、长大、排除，但一旦滞留在钢中就成为大颗粒的夹杂物；铝酸钙夹杂物通常轧制后不变形，即成为点状夹杂物。Although the commonly used calcium treatment technology can denature A1 2 O 3 and Mns inclusions, it effectively solves the continuous casting nozzle nodules, and generates calcium aluminate and CaS inclusions that are relatively less harmful to steel quality, and calcium The treatment also improves the structure and properties of steel to some extent. However, calcium treatment technology also brings some disadvantages: Improper calcium treatment can easily accelerate the erosion rate of the nozzle and cause molten steel pollution; calcium aluminate has a low melting point and is easy to gather, grow, and get rid of Large-grained inclusions; calcium aluminate inclusions usually do not deform after rolling, that is, they become point-like inclusions.
因此，开发低铝、低钙系列炼钢脱氧剂具有非常重要的作用。Therefore, the development of low-aluminum, low-calcium steelmaking deoxidizers has a very important role.
文献号为CN90101571.7的专利申请公开了一种作发热剂用的镁铝合金，其成分为(重量百分比)：Al24～36％以及Si5～7％、Re0.5～1％或Si5.5～7.5％、Mn2～3％或Mn4.5～6.5、Re0.5～1％、Cu3～7％中至少且至多一组，余量为Mg及不可避免的杂质。文献号为CN201110399553.5的专利申请公开了一种镁铝合金及其制备方法，所述合金的组成及其质量百分数为：镁60％～80％，铝8％～10％，锰0.5％～2.0％，镧0.1％～1.0％，铈0.1％～1.0％，镨0.05％～0.5％，钇0.1％～1.0％，锌0.1％～0.5％，锶0.5％～2.0％，杂质元素0.001％～0.5％，其制备步骤为采用保护气体把上述各组分的金属在高温炉中制备成合金，其中熔炼温度为600℃～800℃，浇注温度为650℃～750℃。文献号为CN200710052635.6的专利申请公开了一种镁铝合金包芯线它的芯部合金粉按质量百分比计的化学成分为：Mg5～13％，Al11～14％，余量为Fe及不可避免的杂质。文献号为CN200610096511.3的专利申请公开了一种含稀土镁铝合金及其熔炼工艺，该合金中Al：1～6wt％，Zn：0.6～2wt％，Ce：0.1～2wt％，Fe：≤0.010wt％，Ni：<0.001wt％。其制法为：先将纯镁放入坩埚熔炼炉里，升温至700～750℃，再依次放入铝锭及锌锭，在690～740℃加入稀土镁铈中间合金，搅拌并静置10～40分钟，然后在680～740℃进行浇注,获得铸锭；整个熔炼过程，采用SF6、CO2及压缩空气所组成的混合气体保护熔体。文献号为CN200910028340.4的专利申请公开了一种镁铝合金及其制备方法，该镁铝合金的质量百分含量为：7～10％Al，0.5～2％Zn，0.5～3％Sn，0.05～3.5％Pb，其余为Mg。该韧性镁合金的制备方法：将上述配好的纯Al锭、Mg锭、纯Sn条、纯Pb块、Zn锭在N2/CO2/SF6混合保护气氛中一起加热熔化，混合保护气氛中N2、CO2和SF6的体积比为8∶16∶76。当温度升至700～725℃时，保温4～8分钟后冷却得到韧性镁合金。The patent application whose document number is CN90101571.7 discloses a kind of magnesium-aluminum alloy used as exothermic agent, and its composition is (weight percentage): Al24～36% and Si5～7%, Re0.5～1% or Si5.5 -7.5%, Mn2-3% or Mn4.5-6.5, Re0.5-1%, Cu3-7% at least and at most one group, the balance is Mg and unavoidable impurities. The patent application with the document number CN201110399553.5 discloses a magnesium-aluminum alloy and its preparation method. The composition and mass percentage of the alloy are: magnesium 60%-80%, aluminum 8%-10%, manganese 0.5%- 2.0%, lanthanum 0.1%~1.0%, cerium 0.1%~1.0%, praseodymium 0.05%~0.5%, yttrium 0.1%~1.0%, zinc 0.1%~0.5%, strontium 0.5%~2.0%, impurity elements 0.001%~ 0.5%, the preparation step is to prepare the metals of the above components into alloys in a high-temperature furnace using protective gas, wherein the melting temperature is 600°C-800°C, and the pouring temperature is 650°C-750°C. The patent application with the document number CN200710052635.6 discloses a magnesium-aluminum alloy cored wire. The chemical composition of the alloy powder in its core is: Mg5-13%, Al11-14%, and the balance is Fe and not Avoid impurities. The patent application with the document number CN200610096511.3 discloses a rare earth-containing magnesium-aluminum alloy and its melting process. In the alloy, Al: 1-6wt%, Zn: 0.6-2wt%, Ce: 0.1-2wt%, Fe: ≤ 0.010wt%, Ni: <0.001wt%. The production method is as follows: first put pure magnesium into a crucible melting furnace, heat up to 700-750°C, then put in aluminum ingots and zinc ingots in turn, add rare earth magnesium-cerium master alloy at 690-740°C, stir and stand for 10 ~40 minutes, and then pouring at 680~740°C to obtain ingots; the whole melting process uses a mixed gas composed of SF 6 , CO 2 and compressed air to protect the melt. The patent application with the document number CN200910028340.4 discloses a magnesium-aluminum alloy and its preparation method. The mass percentage of the magnesium-aluminum alloy is: 7-10% Al, 0.5-2% Zn, 0.5-3% Sn, 0.05-3.5% Pb, the rest is Mg. The preparation method of the ductile magnesium alloy: heat and melt the above-mentioned prepared pure Al ingot, Mg ingot, pure Sn bar, pure Pb block, and Zn ingot in a N 2 /CO 2 /SF 6 mixed protective atmosphere, and mix the protective atmosphere The volume ratio of N 2 , CO 2 and SF 6 is 8:16:76. When the temperature rises to 700-725° C., keep warm for 4-8 minutes and then cool to obtain a tough magnesium alloy.
发明内容Contents of the invention
本发明的目的在于解决上述现有技术问题中的至少一项。It is an object of the present invention to solve at least one of the above-mentioned problems of the prior art.
本发明的目的之一在于提供一种低铝、低钙的镁基复合脱氧合金及其炼钢脱氧方法。One of the objectives of the present invention is to provide a low-aluminum, low-calcium magnesium-based composite deoxidation alloy and a steelmaking deoxidation method thereof.
本发明的另一目的在于提供一种能够避免因炼钢铝脱氧后会形成簇状/条状A12O3夹杂而影响钢水质量的脱氧合金及其炼钢脱氧方法。Another object of the present invention is to provide a deoxidized alloy and a steelmaking deoxidation method that can avoid affecting the quality of molten steel due to the formation of clustered/striped A1 2 O 3 inclusions after deoxidation of steelmaking aluminum.
本发明的又一目的在于提供一种能够避免因钙脱氧而导致易堵塞水口等问题的脱氧合金及其炼钢脱氧方法。Another object of the present invention is to provide a deoxidized alloy and a steelmaking deoxidation method that can avoid problems such as easy blockage of nozzles caused by calcium deoxidation.
本发明的一方面提供了一种镁基复合脱氧合金。所述脱氧合金的成分按重量百分比计由：Al10％～25％，Mg45％～70％，Ca10％～25％，Ba1％～5％，余量的Fe及其它不可避免的杂质组成。One aspect of the present invention provides a magnesium-based composite deoxidized alloy. The composition of the deoxidized alloy is composed of 10%-25% of Al, 45%-70% of Mg, 10%-25% of Ca, 1%-5% of Ba, the balance of Fe and other unavoidable impurities.
本发明的另一方面提供了一种炼钢脱氧方法。所述炼钢脱氧方法包括：采用如上所述的镁基复合脱氧合金对钢水进行脱氧处理。Another aspect of the present invention provides a steelmaking deoxidation method. The steel-making deoxidation method includes: using the above-mentioned magnesium-based composite deoxidation alloy to deoxidize molten steel.
与现有技术相比，本发明的有益效果包括：在对钢水进行脱氧的同时具有较强的脱硫能力，能够将钢水脱氧后的夹杂物大多转化为复合夹杂物，能够有效地改善和提高钢水质量。Compared with the prior art, the beneficial effects of the present invention include: it has strong desulfurization ability while deoxidizing the molten steel, can convert most of the inclusions after the deoxidation of the molten steel into composite inclusions, and can effectively improve and increase the quality.
具体实施方式Detailed ways
在下文中，将结合示例性实施例来详细说明本发明的镁基复合脱氧合金及炼钢脱氧方法。Hereinafter, the magnesium-based composite deoxidation alloy and the steelmaking deoxidation method of the present invention will be described in detail with reference to exemplary embodiments.
在本发明的一个示例性实施例中，镁基复合脱氧合金的成分按重量百分比计由：Al10％～25％，Mg45％～70％，Ca10％～25％，Ba1％～5％，余量的Fe及其它不可避免的杂质组成。优选地，该脱氧合金的成分按重量百分比计可包含：Al18％～23％，Mg50％～65％，Ca13％～21％，以及Ba2％～4％。In an exemplary embodiment of the present invention, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 10% to 25% of Al, 45% to 70% of Mg, 10% to 25% of Ca, 1% to 5% of Ba, and the balance Fe and other unavoidable impurities. Preferably, the composition of the deoxidized alloy may include: 18%-23% of Al, 50%-65% of Mg, 13%-21% of Ca, and 2%-4% of Ba in terms of weight percentage.
为了便于在脱氧操作时使用并获得良好的脱氧效果，在本发明中，可将脱氧合金制成具有50～100mm粒度的合金块；或者，可将脱氧合金先破碎至2～5mm的粒度，然后进行包芯操作，制成包芯线。In order to facilitate the use in the deoxidation operation and obtain a good deoxidation effect, in the present invention, the deoxidized alloy can be made into an alloy block with a particle size of 50-100mm; or, the deoxidized alloy can be crushed to a particle size of 2-5mm first, and then Carry out the core wrapping operation to make a cored wire.
在本发明的另一个示例性实施例中，炼钢脱氧方法包括：采用如上所述成分的镁基复合脱氧合金对钢水进行脱氧处理。这里，钢水可以为经铝脱氧后的钢水或经钙脱氧后的钢水，但不限于此。脱氧合金的加入量可根据钢水成分及脱氧要求加入。In another exemplary embodiment of the present invention, the steelmaking deoxidation method includes: using the magnesium-based composite deoxidation alloy with the composition as described above to deoxidize molten steel. Here, the molten steel may be molten steel deoxidized by aluminum or molten steel deoxidized by calcium, but is not limited thereto. The amount of deoxidation alloy can be added according to the composition of molten steel and deoxidation requirements.
在本发明的一个示例性实施例中，炼钢脱氧方法可通过以下方式实现：先将所述脱氧合金破碎成粒度为50～100mm的合金块，然后在出钢过程中待出钢30s后将该合金块加入到钢包中；或者，先将所述脱氧合金破碎成粒度为2～5mm的颗粒并制成包芯线，然后待出钢结束后通过喂线机将所述包芯线加入到钢液中。In an exemplary embodiment of the present invention, the deoxidation method for steelmaking can be realized in the following manner: first, the deoxidized alloy is broken into alloy blocks with a particle size of 50-100 mm, and then after 30 seconds of tapping during the tapping process, the The alloy block is added into the ladle; or, firstly, the deoxidized alloy is crushed into particles with a particle size of 2 to 5 mm to make a cored wire, and then the cored wire is added to the in molten steel.
本发明镁基复合脱氧合金及炼钢脱氧方法在对钢水脱氧的同时具有较强的脱硫能力，钢水脱氧后夹杂物大多转化为复合夹杂物，其中A12O3夹杂物主要转变为MgO·A12O3等，FeS和MnS等硫化物夹杂转变成MnS、CaS和MgS等复合硫化物夹杂，有效改善、提高了钢水质量，解决炼钢铝脱氧后会形成簇状/条状A12O3夹杂，钙脱氧后易堵塞水口等问题。The magnesium-based composite deoxidation alloy and the steelmaking deoxidation method of the present invention have strong desulfurization ability while deoxidizing the molten steel. After the deoxidation of the molten steel, most of the inclusions are converted into composite inclusions, and the A1 2 O 3 inclusions are mainly converted into MgO·A1 2 O 3 , etc., sulfide inclusions such as FeS and MnS are transformed into complex sulfide inclusions such as MnS, CaS and MgS, which effectively improves and improves the quality of molten steel, and solves the problem of cluster/strip A1 2 O 3 formed after aluminum deoxidation in steelmaking Inclusions, calcium deoxidation, easy to block the nozzle and other problems.
下面结合具体示例来详细说明本发明的示例性实施例。Exemplary embodiments of the present invention will be described in detail below in conjunction with specific examples.
示例1Example 1
在本示例中，镁基复合脱氧合金的成分按重量百分比计为：Al25％，Mg50％，Ca19％，Ba5％，其余为Fe及含量不超过0.5％的杂质。In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 25% Al, 50% Mg, 19% Ca, 5% Ba, and the rest is Fe and impurities with a content of no more than 0.5%.
将该脱氧合金破碎成粒度为70～90mm左右的合金块，在上述钢水的出钢过程中，待出钢30s后加入4kg/tFe的合金块到钢包中，对钢液进行脱氧并对夹杂物进行改性。Break the deoxidized alloy into alloy blocks with a particle size of about 70-90 mm. During the tapping process of the above molten steel, add 4 kg/tFe alloy blocks into the ladle after 30 seconds of tapping to deoxidize the molten steel and remove inclusions. Make modifications.
经检测，经本示例脱氧处理后，钢水中的氧含量为182ppm，脱硫率为23％。After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 182ppm, and the desulfurization rate is 23%.
示例2Example 2
在本示例中，镁基复合脱氧合金的成分按重量百分比计为：Al10％，Mg70％，Ca10％％，Ba1％，其余为Fe及含量不超过1％的杂质。In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 10% Al, 70% Mg, 10% Ca, 1% Ba, and the rest is Fe and impurities with a content of no more than 1%.
将该脱氧合金破碎成粒度为3～4mm左右的颗粒并经包芯操作制成包芯线，待出钢结束后通过喂线机将3kg/tFe的包芯线加入到钢液中，对钢液进行脱氧并对夹杂物进行改性。The deoxidized alloy is crushed into particles with a particle size of about 3-4mm, and cored wire is made into cored wire through core wrapping operation. After tapping is completed, 3kg/tFe cored wire is added to molten steel through a wire feeder. The liquid is deoxidized and the inclusions are modified.
经检测，经本示例脱氧处理后，钢水中的氧含量为174ppm，脱硫率为26％。After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 174ppm, and the desulfurization rate is 26%.
示例3Example 3
在本示例中，镁基复合脱氧合金的成分按重量百分比计为：Al23％，Mg60％，Ca16％，以及Ba4％，其余为Fe及含量不超过0.6％的杂质。In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 23% Al, 60% Mg, 16% Ca, and 4% Ba, and the rest is Fe and impurities with a content not exceeding 0.6%.
将该脱氧合金破碎成粒度为70～90mm左右的合金块，在上述钢水的出钢过程中，待出钢30s后加入3.6kg/tFe的合金块到钢包中，对钢液进行脱氧并对夹杂物进行改性。Break the deoxidized alloy into alloy blocks with a particle size of about 70-90 mm. During the tapping process of the above molten steel, add 3.6 kg/tFe alloy blocks into the ladle after 30 seconds of tapping to deoxidize the molten steel and eliminate inclusions. substances are modified.
经检测，经本示例脱氧处理后，钢水中的氧含量为166ppm，脱硫率为28％。After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 166ppm, and the desulfurization rate is 28%.
本发明的炼钢用脱氧合金和脱氧方法的优点包括：能够在对钢水进行脱氧的同时，具有较强的脱硫能力，例如，脱氧后氧含量可到185ppm以下，脱硫率可达20％以上，能够有效地改善和提高钢水质量。The advantages of the deoxidation alloy for steelmaking and the deoxidation method of the present invention include: it can deoxidize molten steel while having a strong desulfurization ability, for example, after deoxidation, the oxygen content can be below 185ppm, and the desulfurization rate can reach more than 20%. Can effectively improve and improve the quality of molten steel.
尽管上面已经结合示例性实施例描述了本发明，但是本领域普通技术人员应该清楚，在不脱离权利要求的精神和范围的情况下，可以对上述实施例进行各种修改。Although the invention has been described above in conjunction with exemplary embodiments, it will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the spirit and scope of the claims.
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