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    • 1. 发明授权
    • 고장력 극저탄소강의 제조방법
    • 超低碳钢制造方法
    • KR100910496B1
    • 2009-07-31
    • KR1020020082113
    • 2002-12-21
    • 주식회사 포스코
    • 안북일박종화이창현김해원
    • C21C5/36
    • 본 발명은 냉연소재용 고장력 극저탄소강을 제조하는 방법에 관한 것이다.
      본 발명에 의하면, 용선을 전로에 장입한 후, 산소를 취입하여 용강 및 인산화물을 함유하는 슬래그를 제조한 다음, 래들로 용강을 출강하고 슬래그를 유출하여 고장력 극저탄소강을 제조하는 방법에 있어서,
      상기 출강시 래들 바닥으로부터 1.0~2.0Nm
      3 /분 유량의 아르곤 가스를 취입하고, 그리고 출강이 완료된 후, 래들 바닥으로부터 1.0~2.0Nm
      3 /분 유량의 아르곤 가스를 취입하면서 알루미늄(Al): 20~80wt% 및 탄산칼슘(CaCO
      3 ): 20~80wt%로 이루어진 부원료를 100~ 500kg/ton-slag 의 투입량으로 래들내의 슬래그위에 투입하여 슬래그중의 인산화물을 환원시켜 용강에 인을 첨가시키는 것을 특징으로 하는 고장력 극저탄소강의 제조방법이 제공된다.
      본 발명은 제강공정에서 고장력 극저탄소강을 제조하는 방법에 있어서 우수한 용강 품질 및 고청정성을 확보하면서 용강중에 인을 첨가시킬 수 있는 효과가 있는 것이다.
      전로, 정련, 극저탄소강, 인첨가, 부원료, 아르곤가스
    • 3. 发明授权
    • 버블링취입패턴 제어를 통한 용강의 2차정련방법
    • 버블링취입패턴제어를통한용강의2차정련방버블
    • KR100460664B1
    • 2004-12-09
    • KR1020020084497
    • 2002-12-26
    • 주식회사 포스코
    • 박영관김해원문호정이창현
    • C21C7/072
    • PURPOSE: A secondary refining method of molten steel through control of bubbling pattern is provided to minimize uniform mixing time of molten steel by optimizing a ratio of bubbling rate blown up and bubbling rate blown down and height of upper blowing lance in the secondary refining process of steelmaking. CONSTITUTION: In a secondary molten steel refining process of floating inclusions in molten steel, thereby removing the floated inclusions as upper bubbling an inner gas from an upper blowing lance dipped from an upper part of teeming ladle and lower bubbling the inert gas to a lower part of the teeming ladle, the secondary refining method of molten steel through control of bubbling pattern comprises a step of installing the upper blowing lance at an elevation of 450 to 550 mm from the bottom of the teeming ladle; and a step of controlling a ratio of bubbling rate blown up and bubbling rate blown down to 1.6 to 1.7:1.
    • 目的:通过控制鼓泡模式的钢水二次精炼方法,以通过优化在二次精炼过程中吹起的起泡率和吹下的泡沫率以及上部吹氧枪的高度来最小化钢水的均匀混合时间。 炼钢。 组成:在钢水中漂浮夹杂物的二次钢水精炼过程中,由此除去从吹炼浇包的上部浸入的上部吹氧枪的内部气体作为上部起泡的浮动夹杂物,并且将惰性气体鼓泡到下部 通过控制起泡图案来控制钢水的二次精炼方法包括以下步骤:在距浇包的底部450〜550mm的高度安装上部吹氧喷枪; 以及控制吹起率和吹起率降至1.6至1.7:1的比例的步骤。
    • 4. 发明公开
    • 극저질소 내열용 스테인레스강 제조 방법
    • 制造含有非常低含量氮的耐热不锈钢的方法
    • KR1020040056328A
    • 2004-06-30
    • KR1020020082931
    • 2002-12-23
    • 주식회사 포스코
    • 김공영이창현권순극
    • C21C7/076
    • Y02P10/242
    • PURPOSE: A method for manufacturing heat resistant stainless steel containing very low content of nitrogen is provided to produce ultra-low nitrogen steel at low cost by preventing nitrogen absorption phenomena caused by contact of molten steel with nitrogen in the atmosphere generated during the tapping process. CONSTITUTION: In a method for manufacturing heat resistant stainless steel containing very low content of nitrogen comprising 17.5 wt.% of Cr, 9.3 wt.% of Ni and 0.25 wt.% of Ti, the method comprises the steps of performing reducing and desulfurizing operations by charging 25 to 30 kg/s-t of electric furnace slag into AOD (argon oxygen decarburization) refining furnace(1) at a time point when the AOD process is finished; and covering an upper surface of discharged steel flow with a large amount of slag when discharging the reduced and desulfurized molten steel(2) into ladle(5) to block the upper part of the discharged steel flow from nitrogen in the atmosphere, wherein the electric furnace slag comprises 37.65 wt.% of CaO, 3.23 wt.% of FeO, 5.76 wt.% of MgO, 3.55 wt.% of MnO, 29.31 wt.% of SiO2, 8.24 wt.% of Al2O3 and 10.28 wt.% of Cr2O3 and has a basicity of 1.3.
    • 目的:提供含有非常低的氮含量的耐热不锈钢的制造方法,通过防止在钢水过程中产生的气氛中的钢水与氮接触而引起的氮吸收现象,以低成本生产超低氮钢。 构成:在含有17.5重量%Cr,9.3重量%Ni和0.25重量%Ti的含有非常低含量氮的耐热不锈钢的方法中,该方法包括以下步骤:进行还原和脱硫操作 在AOD工艺完成的时间点,将25-30kg / st的电炉渣装入AOD(氩氧脱碳)精炼炉(1)中; 并且在将还原脱硫钢水(2)排放到钢包(5)中时,用大量的炉渣覆盖排出的钢流的上表面,从而阻止从大气中的氮气排出的钢流的上部。 炉渣包含37.65重量%的CaO,3.23重量%的FeO,5.76重量%的MgO,3.55重量%的MnO,29.31重量%的SiO 2,8.24重量%的Al 2 O 3和10.28重量%的 Cr2O3,碱度为1.3。
    • 5. 发明公开
    • 수강래들 슬래그 포밍 저감형 보온재 투입방법
    • 将减少形式的热绝缘材料充填到拉链中的方法
    • KR1020040040844A
    • 2004-05-13
    • KR1020020069162
    • 2002-11-08
    • 주식회사 포스코
    • 이창현김해원
    • C21C5/28
    • PURPOSE: A method for charging slag forming reduction type heat insulation material into ladle is provided to suppress slag forming that is an overflow caused by boiling generated as the heat reserving material is being chemically reacted with slag floated on an upper part of molten steel contained in teeming ladle. CONSTITUTION: The method comprises a step of preparing a heat insulation material(5) having a composition comprising 30 to 50 wt.% of silicon dioxide, 20 to 30 wt.% of alumina and less than 3 wt.% of total carbon; and a step of injecting the prepared heat insulation material into slag(6) floated on an upper part of molten steel from the directly above molten steel contained in the teeming ladle(4) in an injection quantity corresponding to a ratio of 0.10 to 2.0 kg of the heat insulation material per kg of slag, wherein the injection quantity of the heat insulation material is 200 to 300 kg in a teeming ladle having inner diameter of 4 m or less and containing 300 tons or less of molten steel.
    • 目的:提供一种将成渣还原型隔热材料装入钢包的方法,用于抑制作为由于储热材料与浮在上述钢水上部的熔渣发生化学反应而产生的沸腾产生的溢流的熔渣形成 浇灌钢包 构成:该方法包括制备具有30至50重量%的二氧化硅,20至30重量%的氧化铝和小于3重量%总碳的组合物的绝热材料(5)的步骤; 以及将准备好的绝热材料从容纳在浇注浇包(4)中的钢水直接上方悬浮在钢水上部的炉渣(6)中的步骤,喷射量相当于0.10-2.0kg 的隔热材料,其中在内径为4μm以下且含有300吨以下的钢水的浇注浇包中,隔热材料的喷射量为200〜300kg。
    • 6. 发明公开
    • 산화마그네슘계 턴디쉬 보온재
    • 用于包裹MgO的陶瓷绝热材料
    • KR1020040001602A
    • 2004-01-07
    • KR1020020036862
    • 2002-06-28
    • 주식회사 포스코
    • 문호정박장흠이창현이현제
    • B22D41/32
    • B22D11/108B22D41/00
    • PURPOSE: A heat insulating material for tundish comprising MgO is provided which is capable of manufacturing casting slab having superior quality by preventing mixing of inclusions and reoxidation of molten steel as a flux coated on the surface of molten steel to give heat insulating ability to molten steel contained in tundish. CONSTITUTION: In a magnesium oxide based tundish heat insulating material coated on the surface of molten steel to give heat insulating ability to molten steel contained in tundish, the heat insulating material is characterized in that size of the heat insulating material is 2.8 to 3.2 mm, and porosity of the heat insulating material is 28 to 30%.
    • 目的:提供一种包含MgO的中间包隔热材料,其能够通过防止夹杂物的混合和钢水的再氧化作为涂覆在钢水表面上的助熔剂来制造具有优良品质的铸造板,从而对熔融钢提供隔热能力 包含在中间包中。 构成:在涂覆在钢水表面上的基于氧化镁的中间包绝热材料中,对中间包中所含的钢水进行隔热能,绝热材料的特征在于隔热材料的尺寸为2.8〜3.2mm, 绝热材料的孔隙率为28〜30%。
    • 7. 发明公开
    • 용강 환류량을 증대시킨 침지관을 갖는 진공 탈가스 장치
    • 真空脱水装置,具有钢水冲洗管
    • KR1020030040967A
    • 2003-05-23
    • KR1020010071645
    • 2001-11-17
    • 주식회사 포스코
    • 박종화이창현김웅래강수창
    • C21C7/10
    • PURPOSE: A vacuum degassing apparatus with molten steel reflux increased submerged pipe is provided in which flux of molten steel is more increased even when a separate complicated facility is not additionally used in the vacuum degassing apparatus with single submerged pipe. CONSTITUTION: The vacuum degassing apparatus with molten steel reflux increased submerged pipe comprises a vacuum tank(1); and a single submerged pipe(2) installed at the lower part of the vacuum tank(1), wherein the apparatus is arranged in the upper side of ladle(6), a certain number of reflux gas nozzles(5) having certain installation angle installed on the side wall of the submerged pipe(2) to blow flux gas into molten steel, a molten steel flow dispersion means(7) having certain thickness (PD) and height (PH) installed at the lower inner side of the submerged pipe(2) so that flow of molten steel is uniformly dispersed into the ladle(6), wherein the molten steel flow dispersion means(7) is a partition wall formed of a rectangular refractory block having certain thickness (PD) and height (PH) integrally connected to the inner wall of the submerged pipe(2) by traversing the central line of the submerged pipe(2), and wherein a submerged pipe installation angle of the reflux gas nozzles(5) installed on the side wall of the submerged pipe(2) is ±60 to ±85 degrees of an angle, and an installation number of the reflux gas nozzles(5) is 24 to 32.
    • 目的:提供一种具有钢水回流的真空脱气装置,其中提供了浸没管,其中即使在具有单个浸没管的真空脱气装置中不另外使用单独的复杂设备,钢水流量也增加。 构成:具有钢水回流的真空脱气装置浸没管包括真空罐(1); 和安装在真空槽(1)的下部的单个浸没管(2),其中该装置设置在钢包(6)的上侧,一定数量的回流气体喷嘴(5)具有一定的安装角度 安装在浸没管(2)的侧壁上以将熔融气体吹入钢水中,具有一定厚度(PD)和高度(PH)的钢水流量分散装置(7)安装在浸没管的下内侧 (2),使钢水流均匀地分散在钢包(6)中,其中钢水流量分散装置(7)是由具有一定厚度(PD)和高度(PH)的矩形耐火砖组成的分隔壁, 通过横穿所述浸没管(2)的中心线与所述浸没管(2)的内壁一体地连接,并且其中安装在所述浸没管(2)的侧壁上的所述回流气体喷嘴(5)的浸没管安装角度 (2)的角度为±60〜±85度,安装次数为 回流气体喷嘴(5)为24〜32。
    • 8. 发明公开
    • 진공탈가스 정련장치용 산소분사랜스
    • 氧气灭菌炉氧气吹制线
    • KR1020030023355A
    • 2003-03-19
    • KR1020010056517
    • 2001-09-13
    • 주식회사 포스코더 로얄 인스티튜션 포 디 어드밴스먼트 오브 러닝/맥길 유니버시티
    • 최현수안상복이창현서왕열무키아르디프랭크
    • C21C5/46
    • C21C7/10C21C5/4606C21C7/072
    • PURPOSE: An oxygen blowing lance for vacuum degassing smelting line comprising a cooling means capable of cooling the oxygen blowing lance effectively to improve decarburization efficiency from molten steel in an RH vacuum degassing smelting line for manufacturing ultra-low carbon steel is provided. CONSTITUTION: In an oxygen blowing lance(40) which is mounted on the vacuum tank in a certain angle of inclination by penetrating the side wall of the vacuum tank to supply oxygen thereinto in an RH vacuum degassing smelting line comprising a ladle in which molten steel is contained, a vacuum tank that is positioned at the upper part of the ladle, and an immersion pipe for forming circulation flowing path of the molten steel between the ladle and vacuum tank, the oxygen blowing lance comprises an oxygen supply pipe(42) for blowing oxygen into the vacuum tank; a tubular body(44) which encircles the outer surface of the oxygen supply pipe, which is extended from the front end part of the oxygen supply pipe that is exposed inside the vacuum tank to the outside of the vacuum tank in a certain length, and both ends of which are sealed; and a volatile liquid material(50) that is stored in a sealed storage space formed between the inner surface of the tubular body and the outer surface of the oxygen supply pipe, wherein the volatile liquid material is vaporized by temperature inside the vacuum tank, and the vaporized gas material is condensed by temperature of the outside of the vacuum tank.
    • 目的:提供一种用于真空脱气熔炼生产线的氧气喷枪,其特征在于包括一种能够有效地冷却氧吹枪的冷却装置,以提高用于制造超低碳钢的RH真空脱气熔炼生产线中钢水的脱碳效率。 构成:在氧气吹扫枪(40)中,其通过穿透真空槽的侧壁以一定的倾斜角度安装在真空罐中,以在RH真空脱气熔炼管线中供应氧气,RH真空脱气熔炼管线包括钢水 设置在钢包的上部的真空槽,以及用于在钢包和真空罐之间形成钢水的循环流动路径的浸入管,所述氧气吹扫喷枪包括供氧管(42),用于 将氧气吹入真空槽; 包围氧气供给管的外表面的筒状体(44),其从在真空槽内暴露的氧供给管的前端部向一定长度的真空槽外部延伸, 其两端密封; 以及储存在形成在管状体的内表面和氧气供给管的外表面之间的密封储存空间中的挥发性液体材料(50),其中挥发性液体材料通过真空罐内的温度蒸发,以及 蒸发的气体材料通过真空罐外部的温度而冷凝。
    • 9. 发明授权
    • 전자기 제동 원리를 이용한 유동 제어 장치 및 그 방법
    • 流体控制装置及使用电磁制动原理的方法
    • KR101129500B1
    • 2012-03-28
    • KR1020040090984
    • 2004-11-09
    • 주식회사 포스코
    • 이준호문호정이창현
    • B22D11/115
    • 본 발명은 제철소의 연속 주조 공정에서 생산되는 제품의 품질을 향상시키기 위해 전자기력을 이용하여 용강의 유동을 제어하는 방법에 관한 것으로서, 보다 상세하게는 두 개의 침지노즐 아래의 불활성 가스가 침지노즐을 통해 유입되는 연속 주조 공정에서 용강이 과도하게 솟아오르는 부분에 대해서는 약한 자기장을 형성하여 솟아오르는 형태의 흐름을 약화시키고, 과냉이 심하게 발생하여 유동을 약화시켜야 하는 부분에서는 자기장 세기를 강하게 인가하여 과냉을 억제함으로써 탕면의 폭방향의 유동을 적절히 배분하여 주편의 표면 품질을 향상시킬 수 있는 전자기 제동 원리를 이용한 유동 제어 장치 및 그 방법에 관한 것이다.
      본 발명에 따른 유동 제어 장치는 상기와 같은 과정을 통해 연속 주조 주형 내의 유동 형태를 적절히 제어함으로써 탕면 안정화에 따른 몰드 파우더의 혼입 저감과 용강 중 비금속 개재물 및 불활성 가스 기포 등을 저감시켜 표면 품질이 양호한 연속 주조 주편을 제조할 수 있다는 장점을 가진다.
      연속 주조, 용강, 유속, 전자기장, 코어, 코일