Technical Report UDC 621 . 746 . 047 620 . 192 . 45
steel cleanliness in a tundish have come to be clarified considerably owing to the research and analysis made thereon.5-8) However in ac-tual production steel is cast via an immersion nozzle and a mold af-ter teeming from a tundish therefore possibilities are conceivable of inclusions sticking to the immersion nozzle and fallout and
Chat OnlineClogging of submersible nozzles in continuous slab-casting
The clogging of submersible nozzles is found to be associated with the deposition of products from the reduction and secondary oxidation of the steel droplets of solidifying steel and slag particles captured by the metal jets when the melt level in the tundish falls. To reduce clogging it is expedient to match the casting rate (the flow rate
Chat OnlineDesign of nozzle for steel continuous casting system based
Abstract In steel continuous casting system tundish upper nozzle has an important role on the flow rate control of the molten steel and the elimination of the inclusions and etc. Based on the basic principle of hydrodynamics the optimal nozzle bore profile was determined with aiming to suppress the turbulence with high kinetic energy
Chat OnlineARGON BUBBLE BEHAVIOR IN SLIDE-GATE TUNDISH
ABSTRACT Argon injection into a tundish nozzle is an efficient and widely employed method to reduce nozzle clogging in the continuous casting process. It also affects casting operation and product quality by changing the flow pattern in the nozzle and mold. The current work combines
Chat OnlineUSB2Continuous casting tundishGoogle Patents
A tundish assembly including an element for preventing or limiting steel reoxidization in the continuous casting of molten steel is used in combination with a refractory nozzle. The element has an orifice engaging the outer surface of the nozzle a main surface surrounding the main orifice and having a lowest level lower than the top outer edge of the nozzle inlet portion and a periphery
Chat OnlineChemInform Abstract Monodispersed Colloidal Spheres Old
Request PDF On Jul 18 2010 Younan Xia and others published ChemInform Abstract Monodispersed Colloidal Spheres Old Materials with New Applications
Chat OnlineUSB2Tundish nozzle exchanging device and
A tundish nozzle is used in a device for exchanging tundish nozzles juxtaposed at a bottom of a tundish. The device includes a pair of first arms pressing and supporting a first lower nozzle located at an undersurface of a first upper nozzle the first upper nozzle being placed at the bottom of the tundish. The device includes a pair of second arms pressing and supporting a second lower nozzle
Chat OnlineOnline forecasting model of tundish nozzle clogging
Feb 01 2006 · The nozzle clogging ratio can be calculated by the following equation -1--- -. CqxK (7) where Lt is the mold inner thickness m Lw is the mold inner width m V is the casting speed m/mLi. As shown by Eq. (7) the nozzle clogging degree can be obtained as long as the Cq can be estimated so the nozzle clogging forecasting model based on Eq.
Chat OnlineSimulation of Non-metallic Inclusion Deposition and
Mar 11 2018 · Abstract Motion of non-metallic inclusions (NMIs) in molten steel and deposition of them on nozzle wall leading to clogging are simulated using a two-way coupling model.
Chat OnlineBehavior Characteristics of Argon Bubbles on Inner Surface
During continuous casting of aluminum-killed steel clogging of tundish nozzle frequently occurs which seriously disrupts the normal casting sequences and deteriorates strand quality. Generally argon blowing technology in the form of a stable and continuous argon film on the inner surface of the upper nozzle is employed to prevent the upper
Chat OnlineUDC 621 . 746 . 27 621 . 36 Twin-torch Type Tundish
The tundish plasma heating controls molten steel temperature and minimizes such decrease in casting speed. It also keeps the molten steel temperature within the optimum casting temperature range pre-vents nozzle clogging and thus reduces the suspension or interrup-tion of casting operation 6). Productivity increases as a result of these effects.
Chat OnlineMetals Special Issue Mold and Tundish Metallurgy
Special Issue "Mold and Tundish Metallurgy". A special issue of Metals (ISSN ). This special issue belongs to the section " Metal Casting Forming and Heat Treatment ". Deadline for manuscript submissions closed (31 December 2020) .
Chat OnlineUSA1Continuous Casting TundishGoogle
A tundish assembly including an element for preventing or limiting steel reoxidization in the continuous casting of molten steel is used in combination with a refractory nozzle.
Chat OnlineMetals Special Issue Refining and Casting of Steel
To solve the nozzle clogging issue in the continuous casting process of 253MA steel a method of modifying solid inclusions to liquid phases is proposed. The CALPHAD technique was employed to predict the liquid region of the Al 2 O 3-SiO 2-Ce 2 O 3 system. Then a thermodynamic package based on the extracted data during the phase diagram
Chat OnlineChemInform Abstract Tundish Nozzle Clogging Application
Request PDF On Sep 18 2010 Brian G. Thomas and others published ChemInform Abstract Tundish Nozzle Clogging Application of Computational Models Find read and cite all
Chat OnlineStudy of Transient Flow Structures in the Continuous
Two -Phase Flow in Tundish Nozzles The tundish nozzle has an important influence on steel quality through its effect on the flow pattern in the mold.Argon is commonly injected into the tundish nozzle to avoid nozzle clogging. It also affects casting operation and product quality by changing the flow pattern in the nozzle and mold.
Chat OnlineCancellation of Bulging Effect on Mold Level in Continuous
Jan 01 2009 · The stopper position permits to vary the flow into the mold. The flow out of the mold is set by means of a pump which supplies the water to the tundish. The mold width can be adjusted to a desired dimension through a mobile wall which moves horizontally. Furthermore the tundish (and the nozzle) slides horizontally too. Tundish Nozzle Mold Fig. 1.
Chat OnlineUSB2Tundish nozzle exchanging device and
A tundish nozzle is used in a device for exchanging tundish nozzles juxtaposed at a bottom of a tundish. The device includes a pair of first arms pressing and supporting a first lower nozzle located at an undersurface of a first upper nozzle the first upper nozzle being placed at the bottom of the tundish. The device includes a pair of second arms pressing and supporting a second lower nozzle
Chat OnlineA Study on the Nonmetallic Inclusion Motions in a Swirling
Dec 29 2017 · Different sizes and shapes of nonmetallic inclusions in a swirling flow submerged entry nozzle (SEN) placed in a new tundish design were investigated by using a Lagrangian particle tracking scheme. The results show that inclusions in the current cylindrical tundish have difficulties remaining in the top tundish region since a strong rotational steel flow exists in this region.
Chat OnlineSimulation of Non-metallic Inclusion Deposition and
Mar 11 2018 · Abstract Motion of non-metallic inclusions (NMIs) in molten steel and deposition of them on nozzle wall leading to clogging are simulated using a two-way coupling model.
Chat OnlineClogging of submersible nozzles in continuous slab-casting
The clogging of submersible nozzles is found to be associated with the deposition of products from the reduction and secondary oxidation of the steel droplets of solidifying steel and slag particles captured by the metal jets when the melt level in the tundish falls. To reduce clogging it is expedient to match the casting rate (the flow rate
Chat OnlineA water-model experimental study of vortex characteristics
Submerged entry nozzle (SEN) clogging is one of the prime causes of vortex formation. This work is designed to investigate and quantify the inter-related effects of nozzle clogging casting speed (CS) and SEN submergence depth on vortex frequency and penetration depth through water-model experiments.
Chat OnlineAn Experimental Study of Submerged Entry Nozzles (SEN
Abstract The submerged entry nozzle (SEN) is used to transport the molten steel from a tundish to a mould. The main purpose of usage is to prevent oxygen and its nitrogen pick-up by molten steelfrom the gas. Furthermore to achieve the desired flow conditions in the
Chat OnlineClogging in Continuous Casting Semantic Scholar
Nozzle clogging is a serious productivity and quality problem in continuous casting. This work reviews the causes effects and solutions to clogging in continuous casting nozzles. The results of a one-dimensional steady state analysis of the heat loss from the molten steel stream through the nozzle wall are discussed. The analyses show that steel may freeze within the clog matrix for a
Chat OnlineSimulation of Non-metallic Inclusion Deposition and
Mar 11 2018 · Abstract Motion of non-metallic inclusions (NMIs) in molten steel and deposition of them on nozzle wall leading to clogging are simulated using a two-way coupling model.
Chat OnlineA Study on the Nonmetallic Inclusion Motions in a Swirling
Dec 29 2017 · Different sizes and shapes of nonmetallic inclusions in a swirling flow submerged entry nozzle (SEN) placed in a new tundish design were investigated by using a Lagrangian particle tracking scheme. The results show that inclusions in the current cylindrical tundish have difficulties remaining in the top tundish region since a strong rotational steel flow exists in this region.
Chat OnlineAlumina coatings on carbon bonded alumina nozzles for
Apr 01 2013 · Clogging an unrequested phenomenon in continuous casting nozzles is the build-up of material in the flow passage between the tundish and the mold. Rackers and Thomas present four general types of clogging each from a different origin. 9
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