Tundish Nozzle Clogging Application Of
CiteSeerX Tundish Nozzle Clogging Application 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
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Prevention of nozzle clogging CustomWritings
Prevention of nozzle clogging 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 PriceImpact of Argon Injection Through Tundish Upper Nozzle on
Impact of Argon Injection Through Tundish Upper Nozzle on Mold Fluid Flow at ArcelorMittal Dofasco s No 1 Application of Sol Gel Bonded Pumpables During Short Shutdown to Replenish and Renew Refractory Linings in Lieu of Conventional Relining Thermodynamic Evaluation of Inclusion Formation and Nozzle Clogging During Slab Casting
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Flow ControlRHI Magnesita
RHI Magnesita offers the complete tundish nozzle portfolio for the continuous casting of steel with nozzles available in a broad range of properties Encompassing diverse raw materials and production methods RHI Magnesita s tundish nozzle portfolio serves all casting demands Tundish nozzles adapted to all systems and customer requirements
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Effects of Clogging Argon Injection and Casting
The inter related effects of nozzle clogging argon injection tundish bath depth slide gate opening position and nozzle bore diameter on the flow rate and pressure in tundish nozzles are quantified using three dimensional multiphase turbulent numerical fluid fl ow models The results are validated with measurements on operating steel continuous slab casting machines and presented for
Get PriceTundish Nozzle Zirconium Sizing Nozzle
Tundish Nozzle Zirconium Sizing Nozzle Description Get Price and support Related Products About Us Help Contact Us Product Sitemap Tel Fax E mail sales8 chinaelong
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ChemInform Abstract Tundish Nozzle Clogging Application
Read ChemInform Abstract Tundish Nozzle Clogging Application of Computational Models ChemInform on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips ChemInform is a weekly Abstracting Service delivering concise information at a glance that was extracted
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Influence of the tundish powder on steel cleanliness and
Chemical composition of tundish powders play a very important role on steel cleanliness and nozzle clogging specially in the case of Low Carbon Aluminum Killed Steels LCAK Steels The design of a good tundish covering powder should accomplish thermal insulation and if
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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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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
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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
Get PriceInfluence of Reoxidation in Tundish on Inclusion for Ca
It was found that reoxidation in tundish converted the well‐modified liquid calcium aluminates into solid Al 2 O 3 ‐rich inclusions which are more likely to cause nozzle clogging than pure Al 2 O 3 and the inclusion number dramatically increased form 2 8 µm −2 after RH treatment to 13 5 µm −2 in tundish further decreased to about 6
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DEVELOPMENT OF NOZZLE CLOGGING INDEX TO
tundish well is not possible during the casting operation Thus precise measure of nozzle clogging is necessary to know the extent of clogging during casting operation Many researchers 7 8 have developed a clogging index factor by comparing the theoretical steel flow rate to the actual value
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Author Index The Evolution of Metallurgical Education p 3
Improvements in Tundish Slidegate System Through Employee Involvement and Teamwork p 439 Steel Flow Velocity Measurement and Flow Pattern Monitoring in the Mould p 445 Mechanisms and Countermeasures of Alumina Clogging in Submerged Nozzles p 451 Inclusion Modification to Prevent Nozzle Clogging p 457
Get PriceCharacteristics of Nozzle Clogging and Evolution of Oxide
Characteristics of nozzle clogging and evolution of oxide inclusion were studied by sampling the deposits of submerged entry nozzle SEN and the molten steel in tundish during Al killed Ti stabilized 18Cr stainless steelmaking process The deposits found in the clogging of SEN were mainly composed of frozen steel and inclusions The inclusions in the deposits and tundish were both mainly MgO
Get PriceNumerical Simulation of Nozzle Clogging of Ferritic
According to actual circumstance of Tang Shan ferritic stainless Steel Company making use of some scene technology parameter and referring a lot of document data the three dimensional mathematical model which coupled the molten steel flow with heat transfer is established by adopting the simulation software FLUENT The result shows The surface flow velocity and turbulent kinetic energy in
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CiteSeerX Tundish Nozzle Clogging Application of
CiteSeerXDocument Details Isaac Councill Lee Giles Pradeep Teregowda 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
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Tundish and its role in Continuous CastingIspatGuru
Tundish is one of the most important areas of refractory application and so is also one of the biggest cost control center in the continuous casting process Various refractories associated with tundish are Tundish lining materials permanent and working lining dams and weirs impact pad flow control system mono block stopper or
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Prevention of Nozzle Clogging in Continuous Casting of Steel
Irregular flow through a tundish nozzle enhances the probability of generating a number of quality defects such as re oxidation of the steel and slag entrapment 4 Nozzle clogging also affects productivity in that less steel is able to be cast because of the blockage in the nozzle In simple business terms less steel equals less profit
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Application of electromagnetic forces to reduce tundish
When continuously casting aluminum killed steel the pouring rate through the tundish nozzle often diminishes due to the build up of oxides within the nozzle which in turn can lead to serious operational problems An extreme consequence of this build up is clogging in which case the metal flow is entirely eliminated
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Silicon Killed Steel Nozzle Clogging By Gregory L Dressel
Another factor in tundish nozzle clogging is the formation of magnesium aluminate spinels This problem occurs at dissolved oxygen levels under 20 ppm in high carbon heats Under reducing conditions in high carbon low dissolved oxygen steels magnesium can be liberated from dolomitic or MgO C slag line brick 4 Fig 16 10 shows that clogging tends to start and get worse at free oxygen levels under 15 ppm for A 36 grades When a high carbon heat is worked for 45 minutes or longer with a white slag practice the occurrences of magnesium aluminate spinel clogging become much more prevalent Several treatments can be used to minimize tundish nozzle clogging due to spinels First white slag treatment of a heat should not be started until a caster delivery time is certain The addition of slag deoxidizers such as calcium carbide ferro silicon or calcium silicon fines should not be used to excess Next the white slag treatment
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Clogged Extruder Nozzle What Causes It How to Avoid It
In this guide we break down the common causes of a clogged nozzle how to unblock it properly and how to prevent it from happening again in future Nothing can be more irritating or more intimidating than a clogged print nozzle You re printing a job everything seems to be progressing nicely when suddenly you hear a clicking or knocking sound from your extruder motor That dreaded
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Observational Study of Clogging Specimens from the Tundish
Observational Study of Clogging Specimens from the Tundish Well Showing Origin and Growth of a Clog in an Al Killed Ti Alloyed Steel Cast
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NOZZLE CLOGGING PREDICTION IN CONTINUOUS CASTING OF STEEL
NOZZLE CLOGGING PROBLEM 2 1 What is nozzle clogging Submerged entry nozzle connects the tundish and the mold in the continuous casting of steel Fig 2 It is a tube with a diameter of about 15 cm and it divides the molten steel into two directions on the both sides of the nozzle
Get PriceMathematical Modeling of Fluid Flow Phenomena during
the clogging of the outlet in the tundish bottom which is connected to the casting mold It is known that nozzle clog ging is a progressive process with inclusions accumulated at the tundish outlets which is the amount of inclusion de posited minus the amount of inclusions washed away by the flowing melt
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Eliminate Tundish Nozzle Clogging
Eliminate clogging of the tundish nozzle in the continuous casting process Solution Skid mounted customised solution with differential pressue regulator and our own range of flow meters and valves This allows for very accurate control of flow and elimination of argon choking
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A Method For On Line Measuring Of Clogging Index In A
The clogging index is an indicator of the degree of deposition of non metallic inclusions inside submerged entry nozzle SEN tube during continuous casting of steel This invention includes online capturing of stopper position tundish weight actual throughput mould cross sectional area data from the control system and uses the data to
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Nozzle Changer Mechanismmonoconfo
Extending tundish sequences by exchanging a worn or clogged metering nozzle with a new nozzle Alternative metering nozzle sizes are used to facilitate casting speed changes as required Using the preloaded safety blank plate the metal stream can be shut off at the push of a button in an emergency situation
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Argon bubble behavior in slide gate tundish nozzles during
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 mathematical modeling and experiments to investigate the argon bubble behavior in slide gate nozzles and to analyze
Get PriceExamination of nozzle clogging in continuous casting
tundish the product quality may be ad versely affected Nozzle clogging primarily occurs in the production of steels where non metallic in clusions with a higher melting temperature than that of the steel 1530–1570 C are formed e g Al 2O 3 CaS 4 In Hungary nozzlecloggingcanprimarilybeobservedin the casting of aluminium killed low silicon
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INFLUENCE OF INCLUSIONS MODIFICATION ON NOZZLE
Clogging of a tundish nozzle may occur during continuous casting of steel billets Scull which forms on the nozzle s inner wall consists of spinel calcium aluminates with various composition and calcium manganese sulphide Keywords clogging inclusion modification spinel calcium aluminates calcium manganese sulphides
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On the Cause and Prevention of Tundish Nozzle Clogging
The formation of accretions or clogging of tundish nozzles in the continuous casting of steel is detrimental both to caster productivity and to eventual inclusion content of the final product The cause of the clogging is related to a combination of operating criteria including ladle slag practice tundish refractory deoxidation methodology and temperature To assess the effect of various
Get PriceClogging Prevention in Submerged Entry Nozzles
Clogging of the SEN is a complex problem which implies large annual costs to the steel industry Nozzle clogging leads to interrupted production when the nozzle or tundish need replacement Moreover clogging reduces steel quality as pieces of the clog may loosen and give rise to larger inclusions in the cast steel
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