WO2009003364A1 - A manufacture process of steel in converter with top, bottom and side lances - Google Patents
A manufacture process of steel in converter with top, bottom and side lances Download PDFInfo
- Publication number
- WO2009003364A1 WO2009003364A1 PCT/CN2008/001237 CN2008001237W WO2009003364A1 WO 2009003364 A1 WO2009003364 A1 WO 2009003364A1 CN 2008001237 W CN2008001237 W CN 2008001237W WO 2009003364 A1 WO2009003364 A1 WO 2009003364A1
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- Prior art keywords
- converter
- gun
- blow
- gas
- slag
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
Definitions
- the invention relates to a converter steelmaking method, in particular to a top-bottom side converter furnace steelmaking method, which is an improvement of the existing converter steelmaking method, and belongs to the technical field of steel metallurgy.
- top-bottom double-blown converter is carried out by top-bottom double-blown converter.
- the common method of top-bottom double-blow converter steelmaking is to blow oxygen from the upper part of the converter pool through the oxygen lance to the molten iron of the molten pool, from the bottom through the bottom gun. Nitrogen or argon is blown into the molten pool to stir the molten pool to improve the stirring ability of the molten pool.
- the double-blown converter the conventional one-step steelmaking process is adopted, and the dephosphorization effect cannot meet the requirements of low-phosphorus steel and ultra-low-phosphorus steel. To this end, there have been two-step steelmaking in the same furnace and two-step steelmaking in the same furnace.
- the double-furnace method for different furnaces uses two converters, one for desiliconization and dephosphorization of molten iron, and the deionized molten iron is exchanged into another converter for decarburization.
- the two-step steelmaking process is carried out in the same converter.
- the dephosphorization slag is poured out and then decarburized.
- Both methods are dephosphorization at lower temperatures to enhance dephosphorization. However, at a lower temperature, it is more difficult to form a certain alkalinity slag by supplying oxygen to the top lance. The slag stratification occurs, the upper slag is better, and the lower part is close to the slag-gold interface. The slag is not well formed, which affects the dephosphorization effect.
- the top-bottom double-blown converter mainly relies on the gas blown by the top gun and the bottom gun to drive the liquid in the molten pool to form an up-and-down circulation flow to stir the molten pool, and a stirring sub-zone is formed above the bottom gun in the molten pool. If the bottom gun is not well arranged, the stirring sub-zones are independent of each other and cannot form a horizontal flow throughout the molten pool, which is not conducive to the mixing of the entire molten pool; even with an asymmetric bottom gun arrangement, it is difficult to make the molten pool Significant horizontal flow. Therefore, when the top and bottom double-blown converter pools are mixed After reducing to a certain level, it is difficult to further reduce it.
- the stirring effect of the bottom gun is lowered due to the rising of the bottom of the furnace, the stirring effect of the converter molten pool is deteriorated, and the mixing time becomes long, which is not conducive to the reaction between the slag gold and the smelting of the ultra-low carbon steel. It is not conducive to reducing the oxidization of slag and molten steel at the smelting end point.
- the object of the present invention is to solve the above problems existing in the prior art, improve the stirring effect of the molten pool of the double-blown converter, further reduce the mixing time of the converter pool, improve the kinetic conditions of the slag gold reaction, and invent a top and bottom.
- the side-blown converter steelmaking method is given, and a new type of top-bottom side blowing converter is given.
- the top and bottom side blowing converter can strengthen the slagging, improve the dephosphorization effect at a lower temperature, reduce the oxidization of the slag and the molten steel at the end of the blowing, and further decarburize the bottom and bottom blowing converter. Dephosphorization operation, or using a top-bottom side converter to carry out conventional one-step steelmaking to improve the dephosphorization effect and metallurgical effect.
- the top-bottom side converter furnace steelmaking method comprises a top-bottom double-blown converter provided with a top gun and a bottom gun, wherein a top gun is used to blow oxygen, and a bottom gun is used to blow the stirring gas.
- the method is characterized in that: at least one side blowing gun is disposed at the height of the entire molten pool of the converter furnace wall of the top-bottom double-blown converter, and a side blowing gun is used to blow the gas or a carrier gas is used to blow the slag powder.
- the side blowing gun is disposed near the slag gold interface of the furnace wall or the side wall of the side wall of the converter trunnion or inside the metal melting pool, and is driven by a side blowing gun.
- a gas is blown into the molten metal pool or a slag powder is blown with a carrier gas.
- the gas blown into the slag gold interface or into the molten metal pool by the side blowing gun is an oxidizing gas (such as oxygen, carbon dioxide, etc.) or a stirring gas (such as nitrogen).
- an oxidizing gas such as oxygen, carbon dioxide, etc.
- a stirring gas such as nitrogen.
- Gas, argon, etc. to strengthen slag formation, improve dephosphorization effect and improve the metallurgical effect of the converter.
- the entire furnace pool height of the converter furnace wall is circumferentially mounted with 1-10 side blow guns.
- the angle between the center line of the side blow gun and the horizontal line is in the range of ⁇ 20°.
- the side blow gun and the wall mounting point of the furnace wall are 10 . Installed in an angle range up to 170°.
- the side blowing guns are arranged in a single layer or in a plurality of layers in the vertical direction of the furnace wall, and may be arranged symmetrically or asymmetrically.
- the side blowing gun adopts a double-layered casing structure when the oxidizing gas is blown or the oxidizing gas is used as a carrier gas to blow the slag forming powder, wherein the inner tube is oxidized.
- the gas or the oxidizing gas is used as the carrier gas to blow into the slag forming powder, the ring between the inner tube and the outer tube is passed through the cooling medium, and the double-wall structure is arranged on the wall of the annular slit, so that the cooling medium is wrapped in a rotating manner.
- the oxidizing gas blows out the side blowing gun.
- the side blowing gun adopts a single-layer pipe structure or a double-layer casing when blowing non-oxidizing gas # or blowing a slag-forming powder with a non-oxidizing gas as a carrier gas. Structure or ring-shaped structure.
- the beneficial effects of the invention are: improving the existing converter steelmaking method, and giving a novel top-bottom side blowing converter, improving the 'stirring effect of the double-blown converter pool, further reducing The mixing time of the converter molten pool improves the kinetic conditions of the slag gold reaction, strengthens the slag formation, improves the dephosphorization effect at lower temperatures, and reduces the oxidation of the slag and molten steel at the end of the blowing.
- Figure 1 is a schematic longitudinal sectional view of a top and bottom side blowing converter
- Figure 2 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the four side blow guns are arranged on both sides of the center line 6 of the top and bottom side blow converter trunnions;
- Figure 3 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the two side blowing guns are arranged on the side line 6 - side of the top and bottom side blow converter trunnion;
- Figure 4 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the two side blowing guns are arranged on both sides of the center line 6 of the top and bottom side blowing converter trunnions;
- Figure 5 is a schematic view of the side blowing gun arranged below the slag-gold interface of the side wall of the top-bottom side blowing converter;
- Figure 6 is a side-blown gun placed on the top and bottom side of the blowing furnace side of the furnace wall under the slag interface Schematic diagram.
- the invention comprises a top-bottom double-blown converter provided with a top gun 1 and a bottom gun 2, wherein the top gun 1 is used to blow oxygen gas, the bottom gun 2 is blown with nitrogen or argon gas to agitate the molten pool, and the top and bottom double-blown converter is rotated.
- the entire molten pool height of the furnace wall is mounted with a side blowing gun 5 blown into an oxidizing gas or a stirring gas, or a carrier gas is blown into the slag forming powder.
- 1-10 side blow guns 5 are installed near the interface between the slag 3 and the metal melt 4 on both sides of the center line 6 of the converter trunnion, preferably 1-6 Branch, side blowing
- the gun 5 can be placed horizontally or in a range of -10° to +10° with the horizontal line, preferably 0° to 5°, and 10° to 170° to the tangent plane of the furnace wall mounting point. Angle range installation, preferably 40 ° ⁇ 90 °.
- the side blowing guns 5 can be arranged in 1-5 layers in the vertical direction, preferably in 1-3 layers.
- the side blow guns 5 can be arranged over the entire height of the converter bath, preferably in a range from 100 mm from the bottom of the new furnace to the slag gold interface.
- the side blowing guns 5 may be arranged symmetrically or asymmetrically.
- the side blowing gun 5 may be blown with an oxidizing gas or a non-oxidizing gas, or may be sprayed with a carrier gas into the slag powder.
- the side blowing gun 5 which is blown into the oxidizing gas or sprayed with the oxidizing gas as the carrier gas into the slag forming powder should be a double-layered sleeve, and the inner tube is made of an oxidizing gas or an oxidizing gas and a slag powder, and the outer layer tube is The inner layer of the inner tube is passed through a cooling medium; when a non-oxidizing gas is blown or a non-oxidizing gas is used as a carrier gas to spray the slag powder, a single-tube side blowing gun is used, or a circumferential seam side blowing gun, or a double layer is used.
- the casing side blows the gun.
- the side blow gun 5 immersed in the molten steel should be supplied with argon gas.
- the diameter of the side blow gun 5 is determined by the capacity of the converter and the strength of the side blow supply.
- Table 1 compares the average carbon and oxygen concentration products of the different side blowing modes of the top and bottom side blowing converters and the top and bottom double blowing converter blowing ends.
- Table 2 compares the average side ton of the top and bottom side blow converters with the average ton of steel and lime consumption of the top and bottom combined blown converters.
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
A manufacture process of steel in converter with top, bottom and side lances comprises utilizing a converter provided with a top lance (1) and bottom lances (2), in which oxygen is blown from the top lance (1), and agitation gas is blown from the bottom lances (2). The process is characterized in that the converter has at least one side lance (5) disposed on the converter sidewall during the height of the molten bath in the converter, and gas or slag former with carrier gas is blown from the side lance (5). The process could improve agitating effect in the molten bath in the converter, shorten mixing time of the molten bath in the converter,improve dynamic conditions of reaction between slag and metal, improve slagging, improve dephosphorizating effect at low temperature, and reduce the oxidability of the terminal slag and of the molten steel.
Description
顶底侧吹转炉炼钢法 Top and bottom side blowing converter steelmaking method
技术领域： Technical field:
本发明涉及一种转炉炼钢法， 特别涉及一种顶底侧吹转炉炼钢法， 是 对现有的转炉炼钢法的改进， 属于钢铁冶金技术领域。 The invention relates to a converter steelmaking method, in particular to a top-bottom side converter furnace steelmaking method, which is an improvement of the existing converter steelmaking method, and belongs to the technical field of steel metallurgy.
冃 坟不： 冃 Grave does not:
目前的转炉炼钢都是采用顶底复吹转炉来进行， 顶底复吹转炉炼钢常 用的方法是从转炉熔池上部通过氧枪向熔池的铁水吹入氧气， 从底部通过 底枪向熔池内吹入氮气或氩气进行熔池搅拌， 以改善熔池的搅拌能力。 在 复吹转炉内， 采用常规一步法炼钢， 脱磷效果不能满足低磷钢、 超低磷钢 的要求。 为此， 出现了异炉双联法炼钢和同炉两步法炼钢。 异炉双联法炼 钢是采用两座转炉， 一座用于铁水脱硅脱磷处理， 脱磷后的铁水兑入另一 座转炉进行脱碳。 同炉两步法炼钢是在同一座转炉， 进行脱硅脱磷处理后， 倒炉倒出脱磷渣， 然后进行脱碳。这两种方法都是在较低的温度进行脱磷， 以提高脱磷效果。 但是， 在较低的温度下， 仅靠顶部氧枪供氧， 要想形成 一定碱度的熔渣较为困难， 会出现熔渣分层现象， 上部炉渣化得较好， 而 下部靠近渣金界面处炉渣化得不好， 影响到脱磷效果。 At present, converter steelmaking is carried out by top-bottom double-blown converter. The common method of top-bottom double-blow converter steelmaking is to blow oxygen from the upper part of the converter pool through the oxygen lance to the molten iron of the molten pool, from the bottom through the bottom gun. Nitrogen or argon is blown into the molten pool to stir the molten pool to improve the stirring ability of the molten pool. In the double-blown converter, the conventional one-step steelmaking process is adopted, and the dephosphorization effect cannot meet the requirements of low-phosphorus steel and ultra-low-phosphorus steel. To this end, there have been two-step steelmaking in the same furnace and two-step steelmaking in the same furnace. The double-furnace method for different furnaces uses two converters, one for desiliconization and dephosphorization of molten iron, and the deionized molten iron is exchanged into another converter for decarburization. In the same furnace, the two-step steelmaking process is carried out in the same converter. After desiliconization and dephosphorization treatment, the dephosphorization slag is poured out and then decarburized. Both methods are dephosphorization at lower temperatures to enhance dephosphorization. However, at a lower temperature, it is more difficult to form a certain alkalinity slag by supplying oxygen to the top lance. The slag stratification occurs, the upper slag is better, and the lower part is close to the slag-gold interface. The slag is not well formed, which affects the dephosphorization effect.
另外， 顶底复吹转炉主要是靠顶枪和底枪吹入的气体带动熔池的液体 形成上下循环流动来进行熔池搅泮的， 在熔池内底枪的上方形成一个个搅 拌子区域， 如果底枪布置不好， 这种搅拌子区域相互独立， 不能在整个熔 池形成水平流动， 不利于整个熔池的混匀； 即使采用非对称的底枪布置， 但也很难使熔池产生明显的水平流动。 所以， 顶底复吹转炉熔池的混勾时
间降低到一定水平后， 就难以再进一步降低。 In addition, the top-bottom double-blown converter mainly relies on the gas blown by the top gun and the bottom gun to drive the liquid in the molten pool to form an up-and-down circulation flow to stir the molten pool, and a stirring sub-zone is formed above the bottom gun in the molten pool. If the bottom gun is not well arranged, the stirring sub-zones are independent of each other and cannot form a horizontal flow throughout the molten pool, which is not conducive to the mixing of the entire molten pool; even with an asymmetric bottom gun arrangement, it is difficult to make the molten pool Significant horizontal flow. Therefore, when the top and bottom double-blown converter pools are mixed After reducing to a certain level, it is difficult to further reduce it.
转炉采用溅渣护炉工艺后， 由于炉底上涨， 底枪的搅拌作用下降， 转 炉熔池的搅拌效果变差， 混匀时间变长， 不利于渣金间的反应和冶炼超低 碳钢， 不利于降低冶炼终点炉渣、 钢液的氧化性。 After the converter adopts the slag splashing protection process, the stirring effect of the bottom gun is lowered due to the rising of the bottom of the furnace, the stirring effect of the converter molten pool is deteriorated, and the mixing time becomes long, which is not conducive to the reaction between the slag gold and the smelting of the ultra-low carbon steel. It is not conducive to reducing the oxidization of slag and molten steel at the smelting end point.
发明内容： Summary of the invention:
本发明的目的是为了解决现有技术存在的上述难题， 提高复吹转炉熔 池的搅拌效果， 进一步降低转炉熔池的混匀时间， 改善渣金反应的动力学 条件， 发明了一种顶底侧吹转炉炼钢法， 并给出了一种新型的顶底侧吹转 炉。 采用该顶底侧吹转炉可以强化造渣， 提高在较低温度下的脱磷效果， 降低吹炼终点炉渣、 钢液的氧化性， 也可利用这种顶底侧吹转炉进行进一 步的脱碳脱磷操作， 或者采用顶底侧吹转炉进行常规的一步法炼钢， 提高 脱磷效果和冶金效果。 The object of the present invention is to solve the above problems existing in the prior art, improve the stirring effect of the molten pool of the double-blown converter, further reduce the mixing time of the converter pool, improve the kinetic conditions of the slag gold reaction, and invent a top and bottom. The side-blown converter steelmaking method is given, and a new type of top-bottom side blowing converter is given. The top and bottom side blowing converter can strengthen the slagging, improve the dephosphorization effect at a lower temperature, reduce the oxidization of the slag and the molten steel at the end of the blowing, and further decarburize the bottom and bottom blowing converter. Dephosphorization operation, or using a top-bottom side converter to carry out conventional one-step steelmaking to improve the dephosphorization effect and metallurgical effect.
本发明所采取的技术方案是， 这种顶底侧吹转炉炼钢法， 包括设置有 顶枪和底枪的顶底复吹转炉， 其中采用顶枪吹入氧气， 通过底枪吹入搅拌 气体， 其特征是： 在顶底复吹转炉的转炉炉壁的整个熔池高度设置有至少 一支侧吹枪， 并采用侧吹枪吹入气体或用载气吹入造渣粉剂。 The technical solution adopted by the present invention is that the top-bottom side converter furnace steelmaking method comprises a top-bottom double-blown converter provided with a top gun and a bottom gun, wherein a top gun is used to blow oxygen, and a bottom gun is used to blow the stirring gas. The method is characterized in that: at least one side blowing gun is disposed at the height of the entire molten pool of the converter furnace wall of the top-bottom double-blown converter, and a side blowing gun is used to blow the gas or a carrier gas is used to blow the slag powder.
为更好的完成本发明的目的， 所述的侧吹枪设置在转炉耳轴中心线的 两侧炉壁或一侧炉壁的渣金界面附近或金属熔池内部， 并采用侧吹枪向渣 金界面或向金属熔池吹入气体或用载气吹入造渣粉剂。 In order to better accomplish the object of the present invention, the side blowing gun is disposed near the slag gold interface of the furnace wall or the side wall of the side wall of the converter trunnion or inside the metal melting pool, and is driven by a side blowing gun. At the slag gold interface, a gas is blown into the molten metal pool or a slag powder is blown with a carrier gas.
为更好的完成本发明的目的， 所述的采用侧吹枪向渣金界面或向金属 熔池吹入的气体为氧化性气体 （如氧气、 二氧化碳等） 或搅拌气体 （如氮
气、 氩气等）， 以强化造渣， 改善脱磷效果和提高转炉的冶金效果。 In order to better accomplish the object of the present invention, the gas blown into the slag gold interface or into the molten metal pool by the side blowing gun is an oxidizing gas (such as oxygen, carbon dioxide, etc.) or a stirring gas (such as nitrogen). Gas, argon, etc., to strengthen slag formation, improve dephosphorization effect and improve the metallurgical effect of the converter.
为更好的完成本发明的目的， 所述的转炉炉壁整个熔池高度的范围沿 圆周上安装 1-10支侧吹枪。 For the purpose of better accomplishing the present invention, the entire furnace pool height of the converter furnace wall is circumferentially mounted with 1-10 side blow guns.
为更好的完成本发明的目的， 所述的侧吹枪中心线与水平线之间的夹 角为 ±20° 的范围。 For the purpose of better accomplishing the present invention, the angle between the center line of the side blow gun and the horizontal line is in the range of ±20°.
为更好的完成本发明的目的， 所述的侧吹枪与炉壁安装点切平面呈 10 。 至 170° 的角度范围安装。 In order to better accomplish the object of the present invention, the side blow gun and the wall mounting point of the furnace wall are 10 . Installed in an angle range up to 170°.
为更好的完成本发明的目的，所述的侧吹枪在炉壁的上下垂直方向上， 为单层布置或多层布置， 可以对称布置， 也可以非对称布置。 For the purpose of better accomplishing the present invention, the side blowing guns are arranged in a single layer or in a plurality of layers in the vertical direction of the furnace wall, and may be arranged symmetrically or asymmetrically.
为更好的完成本发明的目的， 所述的侧吹枪在吹入氧化性气体或用氧 化性气体作载气吹入造渣粉剂时， 采用双层套管结构， 其中内管通氧化性 气体或用氧化性气体作载气吹入造渣粉剂， 内管和外管之间的环缝通冷却 介质， 环缝的管壁上设有来复线结构， 以使冷却介质以旋转的方式包裹氧 化性气体吹出侧吹枪。 In order to better accomplish the object of the present invention, the side blowing gun adopts a double-layered casing structure when the oxidizing gas is blown or the oxidizing gas is used as a carrier gas to blow the slag forming powder, wherein the inner tube is oxidized. The gas or the oxidizing gas is used as the carrier gas to blow into the slag forming powder, the ring between the inner tube and the outer tube is passed through the cooling medium, and the double-wall structure is arranged on the wall of the annular slit, so that the cooling medium is wrapped in a rotating manner. The oxidizing gas blows out the side blowing gun.
为更好的完成本发明的目的， 所述的侧吹枪在吹入非氧化性气 #或用 非氧化性气体作载气吹入造渣粉剂时， 采用单层管结构或双层套管结构或 环缝型结构。 In order to better accomplish the object of the present invention, the side blowing gun adopts a single-layer pipe structure or a double-layer casing when blowing non-oxidizing gas # or blowing a slag-forming powder with a non-oxidizing gas as a carrier gas. Structure or ring-shaped structure.
与现有技术相比， 本发明的有益效果是： 改进了现有的转炉炼钢法， 给出了一种新型的顶底侧吹转炉， 提高复吹转炉熔池的 '搅拌效果， 进一步 降低转炉熔池的混勾时间， 改善渣金反应的动力学条件， 强化造渣， 提高 在较低温度下的脱磷效果， 降低吹炼终点炉渣、 钢液的氧化性。
附图说明： Compared with the prior art, the beneficial effects of the invention are: improving the existing converter steelmaking method, and giving a novel top-bottom side blowing converter, improving the 'stirring effect of the double-blown converter pool, further reducing The mixing time of the converter molten pool improves the kinetic conditions of the slag gold reaction, strengthens the slag formation, improves the dephosphorization effect at lower temperatures, and reduces the oxidation of the slag and molten steel at the end of the blowing. BRIEF DESCRIPTION OF THE DRAWINGS:
图 1为顶底侧吹转炉纵剖面示意图； Figure 1 is a schematic longitudinal sectional view of a top and bottom side blowing converter;
图 2为图 1的 A-A剖面示意图， 表示四支侧吹枪在顶底侧吹转炉耳轴 中心线 6两侧布置的一种方案； Figure 2 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the four side blow guns are arranged on both sides of the center line 6 of the top and bottom side blow converter trunnions;
图 3为图 1的 A-A剖面示意图， 表示两支侧吹枪在顶底侧吹转炉耳轴 中心线 6—侧布置的一种方案； Figure 3 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the two side blowing guns are arranged on the side line 6 - side of the top and bottom side blow converter trunnion;
图 4为图 1的 A-A剖面示意图， 表示两支侧吹枪在顶底侧吹转炉耳轴 中心线 6两侧布置的一种方案； Figure 4 is a cross-sectional view of the A-A of Figure 1, showing a scheme in which the two side blowing guns are arranged on both sides of the center line 6 of the top and bottom side blowing converter trunnions;
图 5为侧吹枪在顶底侧吹转炉一侧炉壁的渣金界面下方布置的示意图； 图 6为侧吹枪在顶底侧吹转炉一侧炉壁的渣金界面下方分上下层布置 的示意图。 Figure 5 is a schematic view of the side blowing gun arranged below the slag-gold interface of the side wall of the top-bottom side blowing converter; Figure 6 is a side-blown gun placed on the top and bottom side of the blowing furnace side of the furnace wall under the slag interface Schematic diagram.
具体实施方式 detailed description
现结合图 1〜图 6， 对本发明的技术方案做进一步的介绍： The technical solution of the present invention will be further introduced in conjunction with FIG. 1 to FIG.
本发明包括设置有顶枪 1和底枪 2的顶底复吹转炉， 其中采用顶枪 1 吹入氧气， 通过底枪 2吹入氮气或氩气搅拌熔池， 在顶底复吹转炉的转炉 炉壁的整个熔池高度安装侧吹枪 5吹入氧化性气体或搅拌气体， 或用载气 吹入造渣粉剂。 根据顶底复吹转炉容量的大小， 在转炉耳轴中心线 6的两侧炉壁的熔 渣 3和金属熔体 4的界面附近安装 1-10支侧吹枪 5, 最好是 1-6支， 侧吹
枪 5可以水平放置， 也可以与水平线呈 -10° 〜 +10° 的范围放置， 最好为 0° 〜 5° ，并与炉壁安装点的切平面呈 10° 〜 170。 角度范围安装，最好 呈 40° 〜 90° 。 The invention comprises a top-bottom double-blown converter provided with a top gun 1 and a bottom gun 2, wherein the top gun 1 is used to blow oxygen gas, the bottom gun 2 is blown with nitrogen or argon gas to agitate the molten pool, and the top and bottom double-blown converter is rotated. The entire molten pool height of the furnace wall is mounted with a side blowing gun 5 blown into an oxidizing gas or a stirring gas, or a carrier gas is blown into the slag forming powder. According to the capacity of the top and bottom double blow converter, 1-10 side blow guns 5 are installed near the interface between the slag 3 and the metal melt 4 on both sides of the center line 6 of the converter trunnion, preferably 1-6 Branch, side blowing The gun 5 can be placed horizontally or in a range of -10° to +10° with the horizontal line, preferably 0° to 5°, and 10° to 170° to the tangent plane of the furnace wall mounting point. Angle range installation, preferably 40 ° ~ 90 °.
侧吹枪 5在上下垂直方向可以分成 1-5层布置， 最好分 1-3层布置。 侧吹枪 5在转炉熔池的整个高度上均可以布置， 最好是在距离新炉炉 底 100mm到渣金界面之间的范围内布置。 The side blowing guns 5 can be arranged in 1-5 layers in the vertical direction, preferably in 1-3 layers. The side blow guns 5 can be arranged over the entire height of the converter bath, preferably in a range from 100 mm from the bottom of the new furnace to the slag gold interface.
侧吹枪 5可以对称布置， 也可以非对称布置。 The side blowing guns 5 may be arranged symmetrically or asymmetrically.
侧吹枪 5可以吹入氧化性气体或非氧化性气体， 也可以用载气喷入造 渣粉剂。 吹入氧化性气体或以氧化性气体作载气喷入造渣粉剂的侧吹枪 5 应采用双层套管， 内层管通氧化性气体或氧化性气体与造渣粉剂， 外层管 与内层管的环缝通冷却介质； 吹入非氧化性气体或用非氧化性气体作载气 喷入造渣粉剂时， 采用单管侧吹枪， 或采用环缝侧吹枪， 或双层套管侧吹 枪。 The side blowing gun 5 may be blown with an oxidizing gas or a non-oxidizing gas, or may be sprayed with a carrier gas into the slag powder. The side blowing gun 5 which is blown into the oxidizing gas or sprayed with the oxidizing gas as the carrier gas into the slag forming powder should be a double-layered sleeve, and the inner tube is made of an oxidizing gas or an oxidizing gas and a slag powder, and the outer layer tube is The inner layer of the inner tube is passed through a cooling medium; when a non-oxidizing gas is blown or a non-oxidizing gas is used as a carrier gas to spray the slag powder, a single-tube side blowing gun is used, or a circumferential seam side blowing gun, or a double layer is used. The casing side blows the gun.
转炉在出钢操作时， 被钢水浸没的侧吹枪 5应通入氩气。 侧吹枪 5的 直径根据转炉容量和侧吹供气强度大小而定。 When the converter is in the tapping operation, the side blow gun 5 immersed in the molten steel should be supplied with argon gas. The diameter of the side blow gun 5 is determined by the capacity of the converter and the strength of the side blow supply.
应用效果 Application effect
表 1为顶底侧吹转炉不同侧吹模式与顶底复吹转炉吹炼终点平均碳氧 浓度积的比较。 表 2为顶底侧吹转炉不同侧吹模式与顶底复吹转炉平均吨 钢石灰消耗量对比。 Table 1 compares the average carbon and oxygen concentration products of the different side blowing modes of the top and bottom side blowing converters and the top and bottom double blowing converter blowing ends. Table 2 compares the average side ton of the top and bottom side blow converters with the average ton of steel and lime consumption of the top and bottom combined blown converters.
表 1 平均出钢碳氧浓度积 Table 1 Average carbon and oxygen concentration product
侧吹模式 模式 1 模式 2 模式 3
顶底侧吹转炉 0. 00196 0. 00246 0. 00221 顶底复吹转炉 0. 00284 0. 00240 0. 00285 Side Blow Mode Mode 1 Mode 2 Mode 3 Top and bottom side blowing converter 0. 00196 0. 00246 0. 00221 Top and bottom combined blowing converter 0. 00284 0. 00240 0. 00285
表 2平均石灰消耗 Table 2 Average lime consumption
从表 1可以看出， 顶底侧吹转炉吹炼终点的平均碳氧浓度积低于顶底 复吹转炉； 表 2的数据表明， 顶底侧吹转炉由于冶炼效果提高， 吨钢的石 灰消耗比顶底侧吹转炉低 4 〜 6kg。
It can be seen from Table 1 that the average carbon-oxygen concentration at the end of the bottom-bottom blowing converter is lower than that of the top-bottom combined-blow converter; the data in Table 2 shows that the top-bottom side converter has improved smelting effect and lime consumption per ton of steel. 4 to 6 kg lower than the top bottom side converter.
Claims
1.一种顶底侧吹转炉炼钢法，包括设置有顶枪和底枪的顶底复吹转炉， 其中采用顶枪吹入氧气， 通过底枪吹入搅拌气体， 其特征是： 在顶底复吹 转炉的转炉炉壁的整个熔池高度设置有至少一支侧吹枪， 并采用侧吹枪吹 入气体或用载气吹入造渣粉剂。 1. A top-bottom side converter furnace steelmaking method comprising a top-bottom double-blown converter provided with a top gun and a bottom gun, wherein a top gun is used to blow oxygen, and a stirring gas is blown through the bottom gun, wherein: The entire molten pool height of the converter furnace wall of the bottom double blowing converter is provided with at least one side blowing gun, and a side blowing gun is used to blow the gas or a carrier gas is used to blow the slag forming powder.
2. 根据权利要求 1所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪设置在转炉耳轴中心线的两侧炉壁或一侧炉壁的渣金界面附近或金属 熔池内部， 并采用侧吹枪向渣金界面或向金属熔池吹入气体或用载气吹入 造渣粉剂。 2. The top-bottom side converter steelmaking method according to claim 1, wherein the side blowing gun is disposed near a slag-gold interface on both sides of the center line of the trunnion of the converter trunnion or on one side of the furnace wall or Inside the molten metal bath, a side blow gun is used to blow the gas into the slag gold interface or to the molten metal pool or to blow the slag powder with the carrier gas.
3. 根据权利要求 1或 2所述的顶底 吹转炉炼钢法， 其特征在于所述 的采用侧吹枪向渣金界面或向金属熔池吹入的气体为氧化性气体或搅拌气 体。 The top-bottom converter steelmaking method according to claim 1 or 2, wherein the gas blown into the slag-gold interface or into the molten metal pool by the side blowing gun is an oxidizing gas or a stirring gas.
4. 根据权利要求 1或 2所述的顶底侧吹转炉炼钢法， 其特征在于所述 的转炉炉壁擎个熔池高度的范围沿圆周上安装 1-10支侧吹枪。 The top-bottom side converter converter steelmaking method according to claim 1 or 2, characterized in that the range of the height of the molten pool of the converter furnace wall is 1-10 side-side blow guns mounted on the circumference.
5. 根据权利要求 4所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪中心线与水平线之间的夹角为 ±20° 的范围。 The top-bottom side converter steelmaking method according to claim 4, characterized in that the angle between the center line of the side blow gun and the horizontal line is in the range of ±20°.
6. 根据权利要求 5所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪与炉壁安装点切平面呈 10° 〜 170 的角度范围安装。 6. The top-bottom side converter converter steelmaking method according to claim 5, wherein the side blowing gun is installed at an angle ranging from 10° to 170 degrees from the plane of the installation point of the furnace wall.
7. 根据权利要求 6所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪在炉壁的上下垂直方向上， 为单层布置或多层布置。
7. The top-bottom side converter steelmaking method according to claim 6, wherein the side blowing guns are arranged in a single layer or in a plurality of layers in the vertical direction of the upper and lower sides of the furnace wall.
8. 根据权利要求 1所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪在吹入氧化性气体或用氧化性气体作载气吹入造渣粉剂时， 采用双层 套管结构， 其中内管通氧化性气体或用氧化性气体作载气吹入造渣粉剂， 内管和外管之间的环缝通冷却介质， 环缝的管壁上设有来复线结构。 8. The top-bottom side converter converter steelmaking method according to claim 1, wherein the side blowing gun adopts double when blowing an oxidizing gas or using an oxidizing gas as a carrier gas to blow the slag powder. a casing structure, wherein the inner pipe is oxidized by an oxidizing gas or an oxidizing gas as a carrier gas, and the ring between the inner pipe and the outer pipe is passed through a cooling medium, and the pipe wall of the ring is provided with a double line structure.
9. 根据权利要求 1所述的顶底侧吹转炉炼钢法， 其特征在于所述的侧 吹枪在吹入非氧化性气体或用非氧化性气体作载气吹入造渣粉剂时， 采用 单层管结构或双层套管结构或环缝型结构。
9. The top-bottom side converter steelmaking method according to claim 1, wherein the side blowing gun is blown with a non-oxidizing gas or a non-oxidizing gas is used as a carrier gas to blow the slag powder. A single-layer pipe structure or a double-layer casing structure or a ring-shaped structure is adopted.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710011950 | 2007-07-03 | ||
| CN200710011950.4 | 2007-07-03 | ||
| CNA2008101263441A CN101338349A (en) | 2007-07-03 | 2008-06-26 | Converter steelmaking process by top, bottom and side blowing |
| CN200810126344.1 | 2008-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009003364A1 true WO2009003364A1 (en) | 2009-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2008/001237 WO2009003364A1 (en) | 2007-07-03 | 2008-06-26 | A manufacture process of steel in converter with top, bottom and side lances |
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| WO (1) | WO2009003364A1 (en) |
Cited By (4)
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| CN102778131A (en) * | 2012-08-03 | 2012-11-14 | 北京科技大学 | Device and method for water model experimental simulation of converting furnace |
| CN109214137A (en) * | 2018-11-12 | 2019-01-15 | 西安建筑科技大学 | A kind of prediction technique for the minimum mixing time in converter flow field |
| CN109472090A (en) * | 2018-11-12 | 2019-03-15 | 西安建筑科技大学 | A kind of prediction technique for the minimum mixing time of ladle |
| CN115786628A (en) * | 2022-11-12 | 2023-03-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for top-purging furnace bottom by using carbon dioxide and oxygen mixture |
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| CN102732669B (en) * | 2012-06-21 | 2014-11-12 | 莱芜钢铁集团有限公司 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
| CN102796841B (en) * | 2012-08-21 | 2014-05-14 | 东北大学 | Method for slagging steelmaking by side blowing of powder particle limestone in top-bottom combined blown converter |
| CN114686641B (en) * | 2020-12-28 | 2024-02-09 | 河北龙凤山铸业有限公司 | Top-bottom side multipoint oxygen blowing purification converter and method |
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| CN109472090A (en) * | 2018-11-12 | 2019-03-15 | 西安建筑科技大学 | A kind of prediction technique for the minimum mixing time of ladle |
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| CN115786628A (en) * | 2022-11-12 | 2023-03-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for top-purging furnace bottom by using carbon dioxide and oxygen mixture |
| CN115786628B (en) * | 2022-11-12 | 2024-06-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for top-purging furnace bottom by mixing carbon dioxide and oxygen |
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