Effect of submergence depth of the ladle shroud on liquid. Ladle shroud as a flow control device for tundish operations. Pdf numerical modelling of dissipation phenomena in a new. An innovative new pouring design for steel castings. To protect the steel stream from reoxidation between the ladle and tundish. To introduce the steel into the tundish with minimum risk of tundish powder entrapment. Pdf the shroud nozzle is used to transport the molten steel from the ladle to the tundish in the continuous casting process. Pdf influence of shroud position on flow induced wall. Two novel shrouds also have been designed to suppress reoxidation of liquid steel during its pouring to tundish from ladle, especially during. Designing and computational modeling study of innovative tundish.
Celebre2000 automated and manual driven designed and manufactured by. A sleeve formed of one or more parts of a size to fit closely around the depending shroud of a hot metal ladle through which the hot metal is delivered to a receptacle, such as a tundish, protects the shroud which is a tubular member formed of metal, ceramic or a composition including graphite or silica from the rapid erosion which occurs whenever the shroud is partially immersed in a pool of. Steel making is the next fundamental process after iron melting. It was assumed that the ladle shroud inside from 200mm below the top to the lower edge was immediately. Ambient air may cause also nitrogen enrichment, which may have a negative influence on some steel properties. These roles are essential for most of steel grades and steel applications. A ladle shroud concept and design to assist in the reduction of slag emulsification in the tundish during ladle change. There, bubbles were formed under the shearing action of the inertial flow of microbubble formation under nonwetting conditions in a. Pdf in the current research study, a mathematical model was. The dimensions were 1,000mm in length and 35mm in thickness. Request pdf gasliquid flows in ladle shroud and their impact on. Pdf advances in ladle shroud as a functional device in. Tundish and its role in continuous casting ispatguru. The shroud is a tube like attachment onto the nozzle of the bottom pour ladle that reduces the exposure of molten steel to air while pouring.
Modeling study of slag emulsification during ladle change. Abstractphysical and mathematical modelling was performed in a fullscale water model tundish to study the effect of the submergence depth of the shroud on melt flow and liquid metal quality. Shroud is usually fixed to nozzle provided at bottom of ladle and its coupling has a. Ladle shroud as a flow control device for tundish operations article pdf available in metallurgical and materials transactions b 441 february 2012 with 1,043 reads how we measure reads. Ladle shroud manipulator movement animation youtube. Different cases have been analyzed, including a conventional ladle shroud ls with a bare tundish and a tundish furnished with an impact pad. The new design for a dissipative ladle shroud dls was studied, using a onethird scale, delta shaped, fourstrand tundish. Us20110248055a1 ladle shroud for liquid metal casting. Pdf development of a hydraulic shroud nozzle manipulator. The new ladle shroud performance is evaluated in a conventional slab. You can use them for cold start and hot start, and also continuous and intermittent use. The results were compared with those achieved with the standard ladle shroud. Any desired configuration can be engineered to fit into your organization.
Pdf as seen from the above, shroud misalignment with an exposed ladle shroud can be catastrophic in terms of transient steel quality to the. Our product range isostatic refractories so static refractories ap p l adle shroud subentry shroud nozzle thin slab sen mono block stopper. Rhi bulletin 12015 the journal of refractory innovations steel edition gyro nozzle for bloom and billet casting interstop ladle gate type s improves refractory utilization gas purging in an electric arc furnace 2015 metec edition rhi at metec 2015 june 1620, 2015 visit our rhi stand e29, hall 5. Ladle shroud shinagawa have developed long servicelife ladle shroud. Development of a hydraulic shroud nozzle manipulator with robust. Sir henry bessemer, of bessemer converter fame, received a patent in 1857 for casting. The dummy bar then extracts the cast strand, and finally moves away to storage, once the forming strand has approached the torch cutter. The molten iron is carried from the casthouse by means of transfer ladle and is then discharged into a furnace for purification and further processing. The shroud itself may also be symbolically important as premchand may be introducing it into the story to highlight to the reader the sense of tradition that exists. It typically has 3 pins that are used as mechanical connection to the moveable shroud holder figure 1. Protective sleeve for the shroud of a hot metal ladle. Pdf ladle shroud is a small but significant device in tundish metallurgy to facilitate both production process and steel quality. Vacuum shroud vsa green flow control device fcd towards. World scientific results 201 300 of 422 jacobs university bremen, school of engineering and science.
Chl systems designed and built ladle shroud manipulator. Advances in the functions of ladle shroud in tundish. These technologies and others will be discussed in the next chapter. The shielding effect is used to protect the steel from air contact. It consisted of an ag material body and carbonfree inner liner. Our ladle preheaters and dryers are offered in many configurations to fit your production requirements. Control of nitrogen pickup in steel at continuous casting. It is consisted of silicafree body material outside with superior erosion resistance and carbonfree liner inside with good spalling resistance. Microbubble formation under nonwetting conditions in a. The overall setup is generic, in that a ladle sits on a rotating turret or swing tower, and empties liquid steel into a tundish set below via a protective ladle shroud. Liquirob brings it to the ladle, and shroud holder and shroud holder ladle part are. Seal, particularly for use with a ladle shroud in the casting of molten metal from a ladle, having an intumescent composition containing expandable graphite from which some, but not all, of interstitial water present therein has been removed.
However tradition is not followed due to the fact that ghisu and madhav decide to get drunk rather than buy the shroud. The new dissipative ladle shroud dls was studied, using a one third scale, delta shaped, fourstrand tundish. Return to article details intensification of liquid steel active flow volume in onestrand tundish using a modified ladle shroud download download pdf. Then the fully automatic shroud manipulator is the first choice. The shroud holder ladle part is mounted on each ladle. A ladle shroud is fixed to a coupling device for reversibly coupling an inlet orifice of said ladle shroud to a collector nozzle fixed to the outside of a bottom floor of a ladle in a metal casting installation, by means of at least a first and second elongated latch pivotally mounted on a hinge, such that the latch can pivot from a fixing position to an idle position. Our preheaters feature cast refractory nozzle holders. You can choose from horizontal or vertical firing arrangements, liftoff portable units or tiltstyle units. These approaches were used to study the performance of fluid flow for a new design of ladle shroud. The present invention relates to a ladle shroud 10 for casting liquid metal, comprising a canal 11 along which the metal can pass, extending essentially along an axis, and a metallic jacket 17 positioned at an end portion of the shroud that corresponds to an end of the canal, characterized in that the jacket 17 comprises at least a belt 18 of a thickness greater than or. Demeter 2 1department of ferrous metallurgy and foundry, faculty of metallurgy, technical university kosice, slovakia 2 ing. The vesuvius ladle shroud ls is an isostatically pressed ceramic tube custom designed for direct connection to the ladle slide gate collector nozzle, offering maximum protection of the steel stream from reoxidation. Due to the continuous path control, all movements are executed and completed in the shortest possible time. Pr351147 2007 aistech conference proceedings fluid flow effect on inclusion removal in a tundish with a swirling ladle shroud.
Gasliquid flows in ladle shroud and their impact on tundish. View of intensification of liquid steel active flow volume in onestrand. Monocon also supply a semiautomatic shroud tube manipulator mstmv1. Our product range isostatic refractories so static.
Continuous casting, also called strand casting, is the process whereby molten metal is. Water wave mechanics for engineers and scientists electronic resource robert g. These units are custom designed to fit your sen ses geometry and temperature requirements. We encourage you to explore all that we have to offer. Numerical simulation investigation on the flow and. If needed, then slagline protection can be provided. It includes the single phase turbulent fluid flow, multi phase fluid flow if the gas is injected from ladle shroud, residence time distribution, growth of inclusion with its motion and removal, mixing and grade transition, thermal energy transport and vortexing formation at the start and the end. Ladle shrouds ask price the vesuvius ladle shroud is a ceramic tube manufactured from isostatically pressed alumina graphite custom designed for immediate connection to the ladle slide gate nozzle giving maximum protection of the steel stream against. We offer innovative design and engineering for optimum efficiency along with package of materials for steel ladle refractory lining which includes gunning materials, back up bricks etc. In the first 11 converter campaigns of this partnership, rhi was able to increase the. From technologybased operating committees to our local member chapers, the opportunities to network with others and expand your technical knowhow abound. Featuring an industrial robot controller the machine allows teaching of all required ladle shroud maneuvers and executing them triggered by the caster control system.
Pdf ladle shroud as a flow control device for tundish. Faint writing seen on shroud of turin update 20 november 2009, by ariel david, associated press writer in this aug. Development of vibration style ladle slag detection methods and the. Shroud is a hollow refractory pipe which is used to drain liquid metal from ladle to a bucket called tundish by nozzle that is fixed at bottom of ladle at drain point. Automatic flow control, automatic pressure control, manual. From the ladle, the hot metal is transferred via a refractory shroud pipe to a holding bath.
The v2 monocon shroud tube manipulator mstmv2 is fully automatic, safe and reliable method of positioning the ladle shroud under the collector nozzle, which has been developed to suit most steel plant applications. Ladle transport transfer cars transportation and transfer cars for both empty and full ladles are manufactured for specific applications. The flow and temperature fields in tundish with gas injection into ladle shroud have been investigated based on a k. Ladle shrouds, with a standard oxidation protection liner at the cnt area, are designed to function without preheating. This coldstart functionality is guaranteed by a special antispalling liner. The shroud anti aspiration control, saac system, provides shielding gas to the ladle shroud gasket. The ladle tube changer ltc is a significant move in technology away from the traditional ladle shroud and collector nozzle joint to a flat plate joint with the ladle shroud no longer held in place by a manipulator, but becoming an integral part of the ladle slide gate system. The major roles of the ladle shroud and gaskets are. All you needed to do is say that and perhaps more calmly and it was a simple factual issue. Ladle slag carryover detection technology scdt is of important practical significance to steel continuous casting production ccp, which. The vesuvius ladle shroud ls is an isostatically pressed ceramic tube custom designed for direct connection to the ladle slide gate collector nozzle. Ladle shroud manipulators ladle shroud manipulators employing either manual or servoassisted operation can be supplied. This is carried out in steel melting shops sms of a steel plant.
The results were compared with those achieved with the conventional ladle shroud. In the fullscale water model tundish, slag entrainment tests were performed at various immersion depths of the shroud. Oxygen from ambient air may cause unwanted oxidic inclusions. There is a range of main body material choice depending on the steel composition.
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