TUNDISH NOZZLE CLOGGINGAPPLICATION OF
Clogging of the tundish nozzle is a major castability problem in continuous casting of steel for several reasons Firstly clogging increases the frequency of operation disruptions to change nozzles or tundishes or even to stop casting These extra transitions increase operating cost decrease productivity and lower quality Secondly clogging can lead directly to a variety of quality problems
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Clogging in Continuous Casting Nozzles K G Rackers and
Clogging in continuous casting nozzles is the buildup of material in the flow passage between the tundish and mold see Figure 1 The consequences of clogging include Decreased productivity To compensate for clogging the flow control device e g slide gate must be further opened
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Basics of Continuous Casting of SteelSteel casting process
The tundish is placed about 80 90 feet above the ground level and the whole process of casting sues gravity to operate The tundish is constantly supplied with molten steel to keep the process going The whole process is controlled to ensure there is smooth flow of molten steel through tundish Further the impurities and slag are filtered in
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Prevention of Nozzle Clogging in Continuous Casting of Steel
Prevention Of Nozzle Clogging In The Continuous Casting Of Steel There have been four documented causes for nozzle clogging in continuous casting steels build up de oxidations such as Al2O3 1 solid steel build up buildup of complex oxides such as spinels and the buildup of reaction products such as CaS 4
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Silicon Killed Steel Nozzle Clogging By Gregory L Dressel
tundish slide gate nozzle change systems calcium and calciumsilicon wire injection systems and increasing the oxygen content of the liquid steel in the ladle and tundish Operators since the start of continuous casting have been increasing the oxygen content of the steel in the tundish to eliminate nozzle clogging
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Steel Making Continuous casting ISlideShare
13 MY 301 Steel Making Processes Mold Mold is the heart of continuous casting Molten stream enters from the tundish through the submerged nozzle into water cooled mold in presence of flux Solidification of steel begins in the mold The casting powder is added onto the
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Dyson Technical CeramicsTundish Metering Nozzles
The lower nozzle is located within an assembly that is fixed to the bottom of the Tundish Once the nozzle wears out or the casting speed needs to be reduced the lower nozzle can be exchanged with either a new lower nozzle or a blank nozzle to shut the strand off entirely Lower nozzles must be erosion resistant to enable long casting sequences
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Continuous casting tundish technologySlideShare
44 Various technologies such as a long nozzle or an inert gas shrouding pipe have been implemented to reduce air reoxidation and slag emulsification Tundish thermal state during continuous casting as function of heat losses through the tundish shell insulation of
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Ceramic Nozzle and Ceramic Tube For Continuous Casting
Ceramic Nozzle and Ceramic Tube For Continuous Casting Tundish Launder The stopper rod and Ceramic Tube are made of high silicon melt material which has strong corrosion resistance and no pollution to metal solution It can be used multiple times
Get PriceRefractory Lining of a Continuous Casting TundishIspatGuru
Fig 1 Typical tundish along with its refractories The refractory lining design and quality of refractories used for lining have major influence on the operational parameters of CC machines such as super heat requirements speed of the machine the phenomenon like initial cold running stopper nozzle clogging tundish through etc Due to the temperature extremes involved refractory linings of
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NOZZLE BLOCKAGE IN CONTINUOUS CASTING OF AL
NOZZLE BLOCKAGE IN CONTINUOUS CASTING OF AL KILLED SAE 1006 Tundish nozzle and submerged entry nozzle clogging are commonly associated with the casting of aluminum killed steel For low carbon Al killed steel grades nozzle clogging can be a production problem Nozzle clogging can lead to disturbed mould flow which causes
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Design of Tundish Nozzles Alignment System for
4 372 Design of Tundish Nozzles Alignment System for Multistrand Billet Casters in Continuous Casting Shop Amresh Kumar Verma1 Sambandham Thirumalai Selvam1 Subhasis Chaudhuri1 Pradeep Kumar Mishra2 Arun Kumar Prasad Singh1 1 Process Engineering Group Design Engineering Division Research Development Centre for Iron Steel Steel Authority of India
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Mechanism of alumina buildup in tundish nozzles during
During continuous casting of aluminum killed steels the pouring rate through the tundish nozzle often diminishes posing serious operating problems This happens because a build up of microscopic alumina particles at the nozzle orifice effectively decreases the nozzle orifice diameter and causes constriction of the liquid steel pouring stream
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Tundish to Mould Solutions for Billet Casters with
Primary objectives Provide accurate and fast flow control adjustment from tundish to mould In some cases be flexible to operate the same caster either with a flow control valve or with a calibrated nozzle calibrated nozzle changer Main features 2 different calibrated nozzle designs with common benefits Increases caster productivity
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Continuous CastingManufacturing Process
Continuous casting can produce long strands from aluminum and copper also the process has been developed for the production of steel The Process Molten metal from some nearby source is poured into a tundish A tundish is a container that is located above the mold it holds the liquid metal for the casting
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Examination of nozzle clogging in continuous casting
entry nozzle SEN This phenomenon has represented a technical problem for steel makers ever since continuous casting was introduced If the problem is temporarily solved either by increasing the inner size of the casting equipment parts or by giv ing oxygen cleaning to the ladle or to the tundish the product quality may be ad versely affected
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Basics of Continuous Casting of SteelSteel casting process
The tundish is placed about 80 90 feet above the ground level and the whole process of casting sues gravity to operate The tundish is constantly supplied with molten steel to keep the process going The whole process is controlled to ensure there is smooth flow of molten steel through tundish Further the impurities and slag are filtered in
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Continuous Castingan overview ScienceDirect Topics
The continuous casting process for steel is shown in Fig 1 second frame and the close up of the upper mold region is shown in Fig 2 this process molten steel flows from a ladle through a tundish into the mold The tundish holds enough metal to provide a continuous flow to the mold even during an exchange of ladles which are supplied periodically from the steelmaking process
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Optimization of Oscillation Parameters in Continuous
In continuous casting the liquid steel from a ladle is first poured into a buffer vessel called a tundish from where it flows continuously through a bifurcated submerged entry nozzle into a water cooled copper mould This mould is about a meter in length with sectional width about one and half meters and thickness about two hundred millimeters Water is circulated through pipes embedded in the mould walls to extract heat from the liquid steel Consequently a thin solidified steel shell develops next to the mould inner walls while inside this shell the steel remains liquid The shell grows in thickness internally even as it is continuously withdrawn from the mould on rollers and further cooled using water sprays Finally the completely solidified slab of required length is cut from the continuously cast strand The schematic representation of continuous casting
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Tundish Nozzle Constriction in Continuous Casting of
A study was made on the problem of tundish nozzle constriction in continuous casting of titanium bearing stainless steel slabs The constriction becomes more severe as the percentage of alumina in the molten steel in the tundish and subsequently the ratio of alumina to titanium nitride increases The main origin of titanium nitride and alumina
Get PricePrevention of Nozzle Clogging in Continuous Casting of Steel
Prevention Of Nozzle Clogging In The Continuous Casting Of Steel There have been four documented causes for nozzle clogging in continuous casting steels build up de oxidations such as Al2O3 1 solid steel build up buildup of complex oxides such as spinels and the buildup of reaction products such as CaS 4
Get PriceLecture 33 continuous casting of steelNPTEL
Figure 33 2 Tundish with flow control device namely weir and slotted dam Mold Mold is the heart of continuous casting In the water cooled mold molten stream enters from the tundish into mold in presence of flux through the submerged nozzle immersed in the liquid steel
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Continuous Casting Refractory Total Tundish Management
The Tundish serves the purpose of a reservoir and a distribution vessel Over the years innovative changes have taken place in CC Tundish We started manufacturing Continuous Casting Refractory CCR from the year 2003 which includes viz Ladle Shroud LS Submerged Entry Nozzle SEN Monoblock Stopper Tundish Nozzle etc
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Development of a Hydraulic Shroud Nozzle Manipulator
The shroud nozzle is used to transport the molten steel from the ladle to the tundish in the continuous casting process A hydraulic manipulator transfers the shroud nozzle and connects it to the collector nozzle installed on the bottom of the ladle During the nozzle connection however the
Get PriceChina Tundish for Continuous Casting in Steel Making Plant
Tundish Casting Machine Steel Casting manufacturer supplier in China offering Tundish for Continuous Casting in Steel Making Plant Wire Rod Production Line/Rolling Mill Plant Hardness Alloy Blade/Cutting Blade/Rolling Blade and so on
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CONTINUOUS CASTINGPrimetals
casting speed in such a way that the soft reduction pro cess is completed right at the end of a movable seg ment Most remarkably the system can determine the casting speed necessary to achieve this online during a casting sequence Since its introduction in 2015 Primetals Technologies has added eight references for Speed Expert
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Continuous Casting ProductsGrind Chem
Tundish Lining Boards √ Disposable boards used to form an inner lining for continuous casting tundishes √ Avoids the lengthy preheating process and saves Energy √ Can be used for multiple heats upto more than 24 Hours of Casting √ Easy deskulling of tundish at completion of casting √ Easy to assemble thereby Improves turn around time significantly
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Tundish nozzle blockage in continuous casting SpringerLink
A new nozzle design with improved heat transfer characteristics eliminated blockage under strictly controlled operation However the stringent requirements for high tundish preheat ≥ 2450 °F and a minimum steel temperature of 2800 °F together with the unresolved problem of canting of the stream are believed to impose serious limitations under actual plant conditions
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Two Phase Flow in Tundish Nozzles During Continuous
Tundish nozzle geometry is one of the few variables that are both very influential on the casting process and relatively inexpensive to change Designing an effective nozzle requires quantitative knowledge of the relationship between nozzle geometry and other process variables on the influential characteristics of the flow exiting the nozzle
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casting speed in such a way that the soft reduction pro cess is completed right at the end of a movable seg ment Most remarkably the system can determine the casting speed necessary to achieve this online during a casting sequence Since its introduction in 2015 Primetals Technologies has added eight references for Speed Expert
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Continuous Casting Processan overview ScienceDirect
The continuous casting process is shown in Figure 1 9 1 Steel is poured from the ladle into the tundish which provides a constant head for molten steel to flow from the tundish into the mold via a submerged entry nozzle SEN The copper mold is water cooled and the bottom of the mold is initially sealed by a dummy bar of steel When steel is poured from the tundish to the mold it freezes to
Get PriceDifferent Type Tundish Zirconic Metering Nozzle In China
Tundish Metering Nozzle Zirconium Nozzle Steelmaking Ladle Related Product RSiC Burner Nozzle with Recrystallized silicon carbide ceramic ReSiC burner tubes SiC bu RSiC plate with Recrystallized Silicon carbide ceramics Kiln shelf sic plates ceramic sand for precision casting
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Two Phase Flow in Tundish Nozzles During Continuous
Tundish nozzle geometry is one of the few variables that are both very influential on the castingprocess and relatively inexpensive to change Designing an effective nozzle requires quantitativeknowledge of the relationship between nozzle geometry and other process variables on theinfluential characteristics of the flow exiting the nozzle This relationship depends on the flowpattern within the nozzle components Most previous modeling studies of flow in the nozzle havefocused on single phase flow 1 4 Argon injection into nozzle is an efficient and widelyemployed method to reduce nozzle clogging even though the real working mechanism s are stillnot fully understood Argon injection may greatly affect the flow pattern in the nozzle andsubsequently in the mold Therefore two phase flow modeling is needed to improveunderstanding of fluid flow in the nozzle
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Mechanism of alumina buildup in tundish nozzles during
During continuous casting of aluminum killed steels the pouring rate through the tundish nozzle often diminishes posing serious operating problems This happens because a buildup of microscopic alumina particles at the nozzle orifice effectively decreases the nozzle orifice diameter and causes constriction of the liquid steel pouring stream There are two major aspects of the constriction
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Strategies Against Reoxidation of Liquid Steel in Billet
changing casting speed if the need arises or for changing the nozzle if erosion cracking or clogging occurs Open casting means no steel jet protection during transfer from ladle to tundish and from tundish to molds with an exception for low carbon steel In some cases the injection of aluminum wire into the mold is still practiced
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VISO Tundish StopperVesuvius
tundish stopper reduces alumina deposits in the sub entry nozzle and promotes the fl oatation of inclusions in the mould Different confi gurations of the stopper nose can be used for argon injection into the steel stream The most commonly used direct injection and permeable plug are shown above The permeable plug is designed and
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