Development of Electromagnetic Swirling Flow in Immersion Nozzle in Continuous Casting Process of Steel

2011 ◽  
Vol 295-297 ◽  
pp. 1284-1288 ◽  
Author(s):  
De Wei Li ◽  
Zhi Jian Su ◽  
Li Wei Sun ◽  
Katsukiyo Marukawa ◽  
Ji Cheng He
Keyword(s):  
Continuous Casting ◽  
Swirling Flow ◽  
Casting Process ◽  
Continuous Casting Process ◽  
New Process ◽  
Electromagnetic Generator ◽  
Set Up ◽  
The Magnetic Field ◽  
Immersion Nozzle

Swirling flow in an immersion nozzle is effective on improving quality of casting block and casting speed in continuous casting process of steel. However, a refractory swirl blade installed in the nozzle is liable to cause clogging, which limit the application of the process. In this study a new process is proposed, that is a rotating electromagnetic field is set up around an immersion nozzle to induce a swirling flow in it by Lorentz force. New types of swirling flow electromagnetic generator are proposed and the effects of the structure of the generator, the coil current intensity and frequency on the magnetic field and on the flow field in the immersion nozzle are numerically analyzed.

scholarly journals Swirling flow control in immersion nozzle for Continuous Casting process

2001 ◽  
Vol 41 (Suppl) ◽  
pp. S47-S51 ◽  
Author(s):  
Shinichiro Yokoya ◽  
Shigeo Takagi ◽  
Manabu Iguchi ◽  
Katsukiyo Marukawa ◽  
Shigeta Hara
Keyword(s):  
Continuous Casting ◽  
Flow Control ◽  
Swirling Flow ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Immersion Nozzle

Optimization of CC Tail Bloom Operation

2012 ◽  
Vol 602-604 ◽  
pp. 478-481
Author(s):  
Hong Pan
Keyword(s):  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process

Cut-to-length bloom can not be controlled at the end of continuous casting process, and the yield of bloom is low. In order to improve the yield of bloom, the CC tail bloom system is proposed according to the bloom continuous casting conditions of equipment and process. Importantly, it is applied in the optimization of tail bloom operation in continuous casting process. Industrial tests show that the yield of bloom is improved obviously, with the quality of bloom is controlled as before.

scholarly journals External Surface Quality of the Graphite Crystallizer as a Factor Influencing the Temperature of the Continuous Casting Process of ETP Grade Copper

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6309
Author(s):  
Paweł Kwaśniewski ◽  
Paweł Strzępek ◽  
Grzegorz Kiesiewicz ◽  
Szymon Kordaszewski ◽  
Krystian Franczak ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Surface Quality ◽  
External Surface ◽  
Cooling System ◽  
Casting Process ◽  
Electrical Energy ◽  
Wire Drawing ◽  
Roughness Coefficient ◽  
Continuous Casting Process

Today’s world is a place where lack of electrical energy would be unimaginable for most of society. All the conductors in the world, both aluminum and copper, have their origin in various types of casting lines where the liquid metal after crystallization is being processed into the form of wires and microwires. However, the efficiency of the continuous casting processes of metals and the final quality of the manufactured product strictly depend on the design of the used crystallizers, the materials used during its production and its quality. Research conducted in this paper focuses on the latter, i.e., external surface quality of the graphite crystallizer at the place of contact with the primary cooling system. In order to quantify its influence on the continuous casting process numerical analyses using the finite element method has been conducted, which results have been further confirmed during empirical tests in laboratory conditions. It has been proven with all of the proposed methods that the temperature of the obtained cast rod is closely linked to the aforementioned surface quality, as when its roughness coefficient surpasses a certain value the temperature of the obtained product increases almost twofold from approx. 150–170 °C to 300–320 °C. These values might influence the quality and final properties of the cast rod, the susceptibility to wire drawing process and possible formation of wire drawing defects and therefore be of much importance to the casting and processing industry.

A New Non-Sinusoidal Oscillation Waveform for Continuous Casting Mold

2010 ◽  
Vol 154-155 ◽  
pp. 334-337
Author(s):  
Xin Jin ◽  
Ting Zhi Ren
Keyword(s):  
Continuous Casting ◽  
Oscillation Frequency ◽  
Casting Process ◽  
Sinusoidal Oscillation ◽  
Continuous Casting Mold ◽  
Continuous Casting Process ◽  
Advanced Technique ◽  
Continuous Casting Slab ◽  
New Type

A new non-sinusoidal oscillation waveform which is shown by waveform distortional rate was advanced. The amplitude, oscillation frequency, waveform distortional rate and casting velocity were established for a computer model of the continuous casting process. The range of waveform distortional rate was ascertained. The choosing method of amplitude and oscillation frequency was given. These offered a theory basis to the application of the advanced technique. Industrial scale experiments showed the new type waveform is effective on improving the quality of continuous casting slab and reducing breakout.

NbCN precipitation during solidification of HSLA steels

1986 ◽  
Vol 44 ◽  
pp. 578-579
Author(s):  
M.G. Burke ◽  
N.S. Pottore ◽  
A.J. DeArdo
Keyword(s):  
Continuous Casting ◽  
Research Program ◽  
Casting Process ◽  
Hot Ductility ◽  
Continuous Casting Process ◽  
Ongoing Research ◽  
Hsla Steels ◽  
Continuously Cast

A TEM/STEM investigation has been directed towards improving the quality of continuously cast HSLA steels. The considerable economic advantages to be derived from continuous casting of HSLA steels is being arrested by the greatly reduced hot-ductility of the con-cast structures. Therefore, to determine the cause of this reduction in ductility, a microstructura1 investigation was conducted using unidirectiona11y solidified ingots to simulate the continuous casting process. This is part of an ongoing research program on Nb-bearing HSLA steels.

Optimization of Synthetic Slag Additions Used in Continuous Casting of Steel

2016 ◽  
Vol 254 ◽  
pp. 176-181
Author(s):  
Marius Ardelean ◽  
Alina Lăscuțoni ◽  
Erika Ardelean ◽  
Ana Socalici
Keyword(s):  
Continuous Casting ◽  
Casting Process ◽  
Powder Coating ◽  
Dispersion Analysis ◽  
Steel Grade ◽  
Analysis Software ◽  
Continuous Casting Process ◽  
Molding Powder ◽  
Made In

The appropriate use and in adequate quantities of synthetic slags in continuous casting process (insulating coating powder in tundish and respectively lubricant molding powder in crystallizer) gives a good quality of continuous castings products. The paper presents two methods of determining the necessary of slags: using dispersion analysis software Minitab.v17 and optimization of heat transfer in tundish, depending on powder coating thickness, performed with a program made in Mathcad14 and respectively optimization of the molding powder thickness, using an own simulation program. Both methods are based on the properties of steel grade which is casted (in particular the liquidus temperature of the steel) and they can be adapted to the specifics of the continuous steel casting machines.

Influence of the presence of a “shelf” on the outer surface of the submerged nozzle and the electromagnetic effect within its length on the qualitative distribution of metal flows during continuous casting of steel

2021 ◽  
pp. 10-15
Author(s):  
A. Yu. Tretyak ◽  
Qiang Wang ◽  
Chun-Lei Wu ◽  
E. I. Shifrin
Keyword(s):  
Continuous Casting ◽  
Casting Process ◽  
Electromagnetic Stirring ◽  
Continuous Casting Of Steel ◽  
Direct Flow ◽  
Qualitative Effect ◽  
Expanding Channel ◽  
Immersion Nozzle ◽  
Research Show

Continuous casting of steel has many ways to control the quality of the billets. The possibilities offered by electromagnetic stirring are far superior to physical eff ects, but combining these two quality control methods can be extremely effective. Research have shown the possibility of a qualitative effect on the flow of the liquid in the mold with implementation of electromagnetic stirring technology and the “skirt” is used in the form of a “shelf” on the nozzle, which is immersed in the mold. In addition, implementation of this shelf increase the possibilities of using direct-flow nozzles with the slope of the inner wall, where in each case it gives advantages, both with an expanding channel, and with a narrowing one. The design of the shelf also does not affect the implementation of electromagnetic stirring in the process of continuous casting, since it is below the level of the mold meniscus and above the level of the effect of the electromagnetic stirrer in the mold. The results of the research show that when using a “shelf” in the middle of the immersion nozzle depth, the casting process is accompanied by the control of most of the flows that are created when the jet enters into the mold and effect of EMS. It also affects the formation of vertex on the meniscus. And the implementation of a “shelf” at the outlet of the submersible nozzle completely changes the nature of the flow of the incoming jet.

Electromagnetic Continuous Casting Process for Near Net Shape Aluminum Alloy Billet

2010 ◽  
Vol 654-656 ◽  
pp. 1400-1403
Author(s):  
Jong Ho Kim ◽  
Myoung Gyun Kim ◽  
Joon Pyo Park ◽  
Gyu Chang Lee ◽  
Ju Bum Kim
Keyword(s):  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Electromagnetic Casting ◽  
New Process ◽  
Near Net Shape ◽  
The Cost ◽  
Electromagnetic Continuous Casting

A new method and apparatus for the fabrication of high-quality, near net shaped aluminum alloy billets is developed by the combination of continuous casting and electromagnetic casting/stirring technique. Traditional machine for continuous casting process involves round, square and rectangular billets; therefore it requires additional multistep forging process to fabricate final products of complicated shape. A new process for the fabrication of near net shaped aluminum billets offers some advantages: the process of extrusion and forging is simplified and the cost of plastic working can be greatly reduced. In order to reduce the peculiar problems such as surface crack and internal defect due to inhomogeneous heat transfer of solidified billets, electromagnetic casting and stirring technique were adopted. The effect of electromagnetic field was compared by observing the microstructure of billets. Grain refinement of aluminum billet was clearly observed by applying electromagnetic field to continuous casting process.

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