CN216263380U - Device for electromagnetically conveying cold steel - Google Patents
Device for electromagnetically conveying cold steel Download PDFInfo
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- CN216263380U CN216263380U CN202120984475.4U CN202120984475U CN216263380U CN 216263380 U CN216263380 U CN 216263380U CN 202120984475 U CN202120984475 U CN 202120984475U CN 216263380 U CN216263380 U CN 216263380U
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- 230000013011 mating Effects 0.000 claims description 3
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Abstract
Description
技术领域technical field
本实用新型涉及钢铁冶金工业连铸技术领域,特别涉及一种电磁输送冷钢的装置。The utility model relates to the technical field of continuous casting in the iron and steel metallurgy industry, in particular to a device for electromagnetically conveying cold steel.
背景技术Background technique
近年来,连铸技术得到了巨大进步,随着拉速不断提高,钢坯中心偏析、疏松等内部质量缺陷逐渐凸显。快速降低结晶器内中心过热度,促使结晶过程在铸坯断面快速均匀进行是消除中心偏析,提高钢坯内部质量的有效手段。连铸结晶器喂钢带技术将钢带插入结晶器内,改变结晶器内温度场的分布,钢带在结晶器内熔融吸热,降低了钢液过热度和铸坯断面温度梯度,使温度分布更有利于等轴晶结晶过程的进行,有利于提高铸坯的形核率,从而提高连铸坯质量,优化铸坯凝固组织,在工业上有良好的应用前景。在中国,部分企业已经完成连铸结晶器喂钢带工艺设备的实验工作,但在喂入钢带过程中会使结晶器液面产生波动,发生卷渣等问题,严重影响连铸坯质量,无法实现工业化大生产。In recent years, continuous casting technology has made great progress. With the continuous increase of the pulling speed, the internal quality defects such as segregation and porosity in the center of the billet have gradually become prominent. Rapidly reducing the degree of superheat in the center of the mold and promoting the rapid and uniform crystallization process in the section of the slab is an effective means to eliminate the center segregation and improve the internal quality of the slab. The continuous casting mold feeding steel strip technology inserts the steel strip into the mold to change the distribution of the temperature field in the mold. The distribution is more conducive to the equiaxed crystal crystallization process, which is beneficial to improve the nucleation rate of the slab, thereby improving the quality of the continuous casting slab and optimizing the solidification structure of the slab, which has a good application prospect in industry. In China, some enterprises have completed the experimental work of the continuous casting mold feeding steel strip process equipment, but during the feeding of the steel strip, the liquid level of the mold will fluctuate, and problems such as slag entrainment will occur, which seriously affects the quality of the continuous casting billet. Industrialized mass production cannot be achieved.
专利公开号CN102974791A公开一种连铸结晶器喂钢带系统,钢带从导向管进入电磁振动器再进入结晶器,在向结晶器送入钢带时,借助电磁铁作用的电磁振动器赋予钢带以强制性谐振。但是电磁振动的导向管会对结晶器保护渣层产生扰动产生卷渣,并且插入的导向管在高温钢液中亦会发生侵蚀损坏,污染钢液。专利公开号CN107900298A公开了一种生产高品质连铸板坯的结晶器喂带装置;钢带穿入喂带引导槽喂入到结晶器的厚度中心位置,不足之处是结构复杂,造成成本的增加,同时存在冷钢进入结晶器时会把钢液表面的保护渣带入到钢液中影响铸坯质量的问题。专利公开号CN206065356U公开了一种连铸结晶器喂带钢用可变渣线的防护装置和连铸结晶器,通过防护装置排开保护渣然后在保护管中直立加入冷钢带。不足之处是露出的钢液会被氧化从而影响铸坯质量。Patent Publication No. CN102974791A discloses a continuous casting mold feeding steel belt system. The steel belt enters an electromagnetic vibrator from a guide tube and then enters the mold. The band is forced to resonate. However, the electromagnetic vibration guide tube will disturb the mold slag layer and cause slag entrainment, and the inserted guide tube will also be eroded and damaged in the high-temperature molten steel, polluting the molten steel. Patent Publication No. CN107900298A discloses a mold feeding device for producing high-quality continuous casting slabs; the steel strip is fed through the feeding belt guide groove and fed to the thickness center position of the mold. The disadvantage is that the structure is complicated and the cost is high. At the same time, when the cold steel enters the mold, the mold flux on the surface of the molten steel will be brought into the molten steel, which will affect the quality of the cast slab. Patent Publication No. CN206065356U discloses a protective device for a variable slag line for continuous casting mold feeding strip steel and a continuous casting mold. The protective slag is discharged through the protective device and then the cold steel strip is added upright in the protective tube. The disadvantage is that the exposed molten steel will be oxidized and affect the quality of the slab.
可见在现有的喂带技术中,一类是直接通过喂钢装置向结晶器内加入冷钢带,该类技术会在喂钢过程中,卷入保护渣而进入铸坯内部影响铸坯质量;另一类是采用排渣装置,如排渣挡板、排渣罩等,该类装置在结晶器上部会占用较大空间,给生产操作带来不便,装置复杂,后期维护成本增加,而且在长期工作中,浸泡于钢液中的避渣装置上的耐耐火材料也会脱落进钢液中影响铸坯质量,同时裸露的钢液会被氧化也影响铸坯质量;最后一类是通过电磁振动的方式减轻粘渣现象发生,但该类振动喂钢对钢液面波动影响很大,卷渣现象严重,仍然会导致铸坯质量下降。It can be seen that in the existing belt feeding technology, one is to directly add cold steel strip to the mold through the steel feeding device. This kind of technology will involve the mold flux and enter the inside of the billet during the steel feeding process, which will affect the quality of the billet. ; The other type is to use slag discharge devices, such as slag discharge baffles, slag discharge hoods, etc. This type of device will occupy a large space in the upper part of the mold, which will bring inconvenience to the production operation, the device is complicated, and the maintenance cost will increase in the later period. In the long-term work, the refractory material on the slag avoidance device immersed in the molten steel will also fall off into the molten steel and affect the quality of the casting billet. At the same time, the exposed molten steel will be oxidized and also affect the quality of the casting billet. The electromagnetic vibration method can reduce the occurrence of slag sticking, but this type of vibration feeding steel has a great influence on the fluctuation of the molten steel level, and the phenomenon of slag entrainment is serious, which will still lead to the decline of the quality of the casting billet.
发明内容SUMMARY OF THE INVENTION
本实用新型的目的是提供一种电磁输送冷钢的装置,克服现有技术的不足,通过电磁力运送冷钢到水口处加入冷钢,降低对结晶器上部空间的要求,可适应几乎所有种类的结晶器,可以解决连铸结晶器喂冷钢的卷渣等问题,提高铸坯或钢锭内部铸坯形核率,优化铸坯或钢锭凝固组织,提升连铸坯质量。The purpose of this utility model is to provide a device for electromagnetically transporting cold steel, which overcomes the deficiencies of the prior art, transports cold steel to the nozzle by electromagnetic force and adds cold steel, reduces the requirements for the upper space of the mold, and can adapt to almost all types of It can solve the problem of slag entrainment in the continuous casting mold feeding cold steel, improve the nucleation rate of the billet or the inside of the billet, optimize the solidification structure of the billet or ingot, and improve the quality of the continuous casting billet.
为了实现上述目的,本实用新型采用以下技术方案实现:In order to achieve the above object, the utility model adopts the following technical solutions to realize:
一种电磁输送冷钢的装置,其特征在于,包括绝缘导槽、线圈、加料漏斗、电源、PLC控制器、气保系统,所述绝缘导槽的一端开口连接加料漏斗,另一端开口通过连接扣件与设于中间包和结晶器之间的下水口的侧壁相连通,绝缘导槽上绕制有线圈,线圈的两端分别与电源和PLC控制器相连接;气保系统包括保护气体罐、气体管路以及气体管路上的调节阀,气体管路均与绝缘导槽相连通。A device for electromagnetically conveying cold steel, which is characterized in that it includes an insulating guide groove, a coil, a feeding funnel, a power supply, a PLC controller, and a gas protection system. The fastener is communicated with the side wall of the water outlet located between the tundish and the mold, the insulating guide groove is wound with a coil, and the two ends of the coil are respectively connected with the power supply and the PLC controller; the gas protection system includes protective gas The tank, the gas pipeline and the regulating valve on the gas pipeline, and the gas pipeline are all connected with the insulating guide groove.
进一步的,所述连接扣件结构包括安装座、密封圈、导槽接头和螺旋卡扣,安装座镶嵌在下水口耐材的侧壁内,导槽接头为钢制与绝缘导槽的另一端外径匹配,螺旋卡扣与安装座上的外螺纹相啮合。Further, the connecting fastener structure includes a mounting seat, a sealing ring, a guide groove joint and a screw buckle, the mounting seat is embedded in the side wall of the refractory material of the water outlet, and the guide groove joint is made of steel and outside the other end of the insulating guide groove. The diameter is matched, and the screw buckle is engaged with the external thread on the mounting seat.
进一步的,所述密封圈为石墨密封圈。Further, the sealing ring is a graphite sealing ring.
进一步的,所述导槽接头的中轴线具有一个向上倾斜5~30度的夹角,其与绝缘导槽的另一端的配合段不少于50mm。Further, the central axis of the guide groove joint has an included angle inclined upwardly by 5-30 degrees, and the mating section with the other end of the insulating guide groove is not less than 50 mm.
本实用新型提出的连接扣件可以作为整个或一段下水口替代物保护水口不受损坏,电磁输送装置内充满保护气体,平衡电磁输送装置的内外气压,避免钢液回流,使冷钢受到洛伦兹力的作用从而将冷钢送出进入到中间包下水口内,顺应钢水的流动进入结晶器中。The connecting fastener proposed by the utility model can be used as a substitute for the whole or a section of the nozzle to protect the nozzle from damage, the electromagnetic conveying device is filled with protective gas, the internal and external air pressure of the electromagnetic conveying device is balanced, the backflow of molten steel is avoided, and the cold steel is subjected to Loran The effect of this force will send the cold steel out into the tundish sewer, and enter the mold according to the flow of molten steel.
与用载气吹入冷钢相比,通过电磁力加入冷钢克服了钢坯内部出现气孔的问题;并且本设计的整个工作过程装置不与高温钢水接触,避免了该装置的热腐蚀和钢水的冲刷,有利于延长电磁装置的使用寿命。Compared with blowing into cold steel with carrier gas, adding cold steel by electromagnetic force overcomes the problem of pores inside the billet; and the whole working process of this design is not in contact with high-temperature molten steel, which avoids the hot corrosion of the device and the corrosion of molten steel. Erosion is beneficial to prolong the service life of the electromagnetic device.
与现有技术相比,本实用新型的有益效果是:Compared with the prior art, the beneficial effects of the present utility model are:
1)只需利用原有的水口即可加入冷钢,增大了结晶器上部空间,对浇铸尺寸较小的板坯或方坯有非常好的适应性;1) Only the original nozzle can be used to add cold steel, which increases the upper space of the mold and has a very good adaptability to the casting of slabs or billets with small sizes;
2)本实用新型提出了一种新的冷钢加入方法,在中间包下水口添加冷钢进入结晶器内部的方法,避免了冷钢在加入的同时卷入保护渣;2) The present utility model proposes a new method of adding cold steel, which is a method of adding cold steel at the tundish downhole and entering the mold, so as to avoid the cold steel being involved in mold slag while being added;
3)通过保护气平衡电磁输送装置的内外气压进而采用电磁力加入冷钢,与用载气吹入冷钢相比,克服了钢坯内部出现气孔的问题。3) By balancing the internal and external air pressure of the electromagnetic conveying device through the protective gas, and then adding the cold steel by electromagnetic force, compared with blowing the cold steel with the carrier gas, the problem of pores inside the billet is overcome.
4)根据实际工艺参数及其要求,可控制冷钢加入结晶器中的速度;4) According to the actual process parameters and requirements, the speed at which the cooling steel is added to the mold can be controlled;
5)电磁输送装置不与中间包内流出的高温钢水接触,避免了该装置的热腐蚀和钢水的冲刷,从而延长了电磁输送装置的使用寿命;5) The electromagnetic conveying device is not in contact with the high-temperature molten steel flowing out of the tundish, which avoids the hot corrosion of the device and the erosion of molten steel, thereby prolonging the service life of the electromagnetic conveying device;
6)连接扣件可以作为整个或一段下水口替代物保护水口不受损坏,提升了现有水口的耐损性能;6) The connecting fastener can be used as a substitute for the whole or a section of the nozzle to protect the nozzle from damage, which improves the damage resistance of the existing nozzle;
7)本实用新型装置结构简单,运行维护成本低,具有广泛的通用性。7) The device of the utility model has the advantages of simple structure, low operation and maintenance cost, and wide versatility.
附图说明Description of drawings
图1是本实用新型电磁输送冷钢的装置实施例结构示意图;1 is a schematic structural diagram of an embodiment of a device for electromagnetically conveying cold steel according to the present invention;
图2是本实用新型电磁输送冷钢的方法实施例结构示意图,显示冷钢的加入状态;2 is a schematic structural diagram of an embodiment of the method for electromagnetically transporting cold steel according to the present invention, showing the state of adding cold steel;
图3是本实用新型实施例中的连接扣件结构示意图。3 is a schematic structural diagram of a connecting fastener in an embodiment of the present invention.
图中:1-钢水、2-中间包、3-电磁输送装置、4-冷钢、5-结晶器、6-下水口、7-中间包测温装置、8-绝缘导槽、9-线圈(设置多组)、10-加料漏斗、11-连接扣件、12-电源、13-PLC控制器、14-排气阀门、15-进气阀门、16-排气泵、17-压力控制器、18-气体流量计、19-保护气体罐、21-下水口耐材、22-安装座、23-导槽接头、24-密封圈、25-螺旋卡扣。In the picture: 1- molten steel, 2- tundish, 3- electromagnetic conveying device, 4- cold steel, 5- mold, 6- water outlet, 7- tundish temperature measuring device, 8- insulation guide groove, 9- coil (set multiple groups), 10-feeding funnel, 11-connecting fastener, 12-power supply, 13-PLC controller, 14-exhaust valve, 15-inlet valve, 16-exhaust pump, 17-pressure controller, 18-Gas flowmeter, 19-Protective gas tank, 21-Suction refractory material, 22-Mounting seat, 23-Guide groove joint, 24-Sealing ring, 25-Screw buckle.
具体实施方式Detailed ways
下面结合实施例对本实用新型的技术方案作进一步说明:Below in conjunction with embodiment, the technical scheme of the present utility model is further described:
在本实用新型的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本实用新型中的具体含义。In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.
见图1-图3,是本实用新型一种电磁输送冷钢的装置实施例的结构示意图,包括绝缘导槽8、线圈9、加料漏斗10、电源12、PLC控制器13、气保系统,绝缘导槽8的一端开口连接加料漏斗10,另一端开口通过连接扣件11与设于中间包2和结晶器5之间的下水口6相连通,绝缘导槽8上绕制有线圈9,线圈9的两端分别与电源12和PLC控制器13相连接;16、排气管路和管路上的控制阀;气保系统包括保护气体罐19、气体管路以及气体管路上的调节阀,排气管路和气体管路均与绝缘导槽8相连通。1 to FIG. 3 are schematic structural diagrams of an embodiment of a device for electromagnetically conveying cold steel according to the present invention, including an
连接扣件结构包括安装座22、密封圈24、导槽接头23和螺旋卡扣25,安装座22镶嵌在下水口耐材21的侧壁内,导槽接头23为钢制与绝缘导槽8的另一端外径匹配,螺旋卡扣25与安装座22上的外螺纹相啮合。密封圈24为石墨密封圈。导槽接头23的中轴线具有一个向上倾斜5~30度的夹角,其与绝缘导槽8的另一端的配合段不少于50mm,以减少冷钢的移动阻力。The connecting fastener structure includes a
本实用新型创造性提出了在中间包下水口处加入冷钢的想法,这与传统方法截然不同,在结晶器钢液面上不再设计其他的冷钢加入装置,只需在原有的水口中部进行设计安装,为结晶器液面节约了大面积可操作空间;本实用新型避免了装置直接与钢水接触,延长冷钢输送装置的使用寿命。本实用新型能通过实际浇铸参数简单快捷控制冷钢加入的速度并能持续加入冷钢;本实用新型可通过平衡气压的方式避免了钢液回流。在连铸过程中,为防止浇铸过程中钢液倒流入电磁输送装置中,对电磁输送装置造成破坏并污浊钢液,本实用新型在绝缘导槽外安装设计了一套气保系统,可以平衡浇铸过程中钢液顺流而下带来的负压,避免钢液回流的同时也能使输送冷钢装置独立于水口外侧不对钢液造成影响。The utility model creatively proposes the idea of adding cold steel at the nozzle of the tundish, which is completely different from the traditional method. No other cold steel adding device is designed on the molten steel surface of the mold, and it only needs to be carried out in the middle of the original nozzle. The design and installation saves a large area of operable space for the liquid level of the crystallizer; the utility model avoids the direct contact of the device with molten steel and prolongs the service life of the cold steel conveying device. The utility model can simply and quickly control the adding speed of the cold steel through the actual casting parameters and can continuously add the cold steel; the utility model can avoid the backflow of the molten steel by balancing the air pressure. In the continuous casting process, in order to prevent the molten steel from flowing back into the electromagnetic conveying device during the casting process, causing damage to the electromagnetic conveying device and polluting the molten steel, the utility model is installed and designed a set of gas protection system outside the insulating guide groove, which can balance During the casting process, the negative pressure caused by the downstream flow of the molten steel can avoid the backflow of the molten steel, and at the same time, the cold steel conveying device can be independent of the outside of the nozzle and not affect the molten steel.
本实用新型设计的绝缘导槽材质主要为碳酸钙质材料,连接扣件11使电磁输送装置与中间包下水口连接稳定,可避免二者耐材受挤压破损。密封圈24使用螺旋卡扣25固定,使下水口6与电磁输送装置3稳定连接。浇铸开始前首先在加料漏斗10中加满冷钢4,然后关闭漏斗上口,使冷钢输送装置密闭,然后打开排气阀门14,通过压力控制器17开启排气泵16抽干电磁输送装置中的空气,排气后,关闭排气阀门14,紧接着打开进气阀门15,通过压力控制器17开启气体流量计18,从而将氩气储气罐19中的氩气加入电磁输送装置3中平衡气压,此时电磁输送装置进入工作状态,通过中间包测温装置7检测中间包内的温度并返回给PLC控制器13,通过PLC控制器13控制线圈9中的电流,冷钢4在磁场中受线圈9产生的磁场力作用,移动至中间包下水口6中,顺应钢水流动进入结晶器。冷钢的进入改变了结晶器内温度场的分布,其在结晶器内先凝固后融化,降低了钢液过热度和铸坯断面温度梯度,使温度分布更有利于等轴晶结晶过程的进行,有利于铸坯形核率的提高。The material of the insulating guide groove designed by the utility model is mainly calcium carbonate material, and the connecting
以上仅为本实用新型较佳的具体实施方式,但本实用新型的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内,根据本实用新型的技术方案及其实用新型构思加以等同替换或改变,都应涵盖在本实用新型的保护范围之内。The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The equivalent replacement or modification of the scheme and its utility model concept shall be included within the protection scope of the present utility model.
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