Modernization of the secondary cooling system on a curvilinear caster in the converter shop at the Severstal’ Metallurgical Combine

Efficient secondary cooling water control level slab continuous casting process and quality are closely related. Casting solidification heat transfer model is the basis of process control and optimization, heat transfer model based on determining the secondary cooling system is the most widely used method for casting production process can be simulated. However, when considering the many factors affecting the production and input conditions change significantly, real-time and strain of this method is not guaranteed. Therefore, the artificial intelligence optimization algorithms such as genetic algorithms, neural networks, fuzzy controllers, introducing continuous casting secondary cooling water distribution and dynamics of optimal control methods, the rational allocation of caster secondary cooling water and dynamic control is important.

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Optimal Design of Dynamic Secondary Cooling of Continuous Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.472-475.1907 ◽

2012 ◽

Vol 472-475 ◽

pp. 1907-1910

Author(s):

Yi Wang ◽

Xin Jian Ma

Keyword(s):

Numerical Simulation ◽

Mathematical Model ◽

Finite Element ◽

Continuous Casting ◽

Cooling System ◽

Solidification Process ◽

Element Model ◽

Secondary Cooling ◽

The Mathematical Model ◽

The Finite Element Model

Numerical simulation of the secondary cooling is applied to the design of continuous casting. The mathematical model for solidification process of the strand under air-mist was established and calculated with the finite element model. The model is used to calculate the feasible operating range of the continuous casting machines. The dynamic secondary cooling system has been analyzed with consideration of the thermo mechanical principles and numerical model. The adequacy of the model has been confirmed with experimental results.

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Study on Internal Quality of Billets for 20CrMnTiH Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.941-944.132 ◽

2014 ◽

Vol 941-944 ◽

pp. 132-137

Author(s):

Hong Guang Li ◽

Tian Ming Chen ◽

Liang Chen ◽

Jia Qi Wang ◽

Wen Zhong Yang

Keyword(s):

Quality Control ◽

Quality Improvement ◽

Casting Speed ◽

Cooling System ◽

Current Intensity ◽

Internal Quality Control ◽

Internal Quality ◽

Secondary Cooling ◽

Carbon Segregation

According to the requirement of 20CrMnTiH steel, the effects of casting peed, EMS current intensity and secondary cooling system on internal quality of billets are studied. The results show that, it is beneficial to internal quality control of 20CrMnTiH billets when the casting speed is in the range of 1.2~1.4m/min, and when the current intensity of EMS is 380A, the level of center porosity can be controlled in 1.0, the index of carbon segregation can be controlled in 1.08 and equiax crystal ratio reaches 34.9%. Furthermore, it is beneficial to internal quality improvement when weak secondary cooling system is adopted. With the application of the studies, the quality of billet macrostructure and hardenability can meet the requirement of 20CrMnTiH steel.

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Windage Heating of Air Passing Through Labyrinth Seals

Volume 1: Turbomachinery ◽

10.1115/94-gt-056 ◽

1994 ◽

Cited By ~ 3

Author(s):

J. A. Millward ◽

M. F. Edwards

Keyword(s):

High Speed ◽

Cooling System ◽

Momentum Balance ◽

Viscous Drag ◽

Turbine Engines ◽

Gas Turbine Engines ◽

Secondary Cooling ◽

Labyrinth Seals ◽

Accurate Temperature ◽

Cooling Air

The viscous drag on rotating components in gas turbine engines represents both a direct loss of power from the cycle and an input of heat into the secondary (cooling) air system. Hotter cooling air in turn means increased flow requirements. The effects of windage on performance are therefore compounded. To facilitate accurate temperature predictions of highly stressed components, information is needed on windage characteristics of all elements in the secondary cooling system. Much information is available in the literature for discs, cones, cylinders, bolts etc but little has been published on windage heating in high speed seals. Results are presented for experiments carried out (at representative non-dimensional conditions) on different designs of labyrinth seals. The results are compared with values calculated from the simple momentum balance theory suggested by McGreeham and Ko (1989) and with several values determined from CFD analysis.

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Research and Application of Dynamic Secondary Cooling Control System for a Continuous Steel Billet Caster

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.572.404 ◽

2012 ◽

Vol 572 ◽

pp. 404-409

Author(s):

Zun Peng ◽

Wen Hao Hu ◽

Yan Ping Bao ◽

Min Wang ◽

Li Qiang Zhang ◽

...

Keyword(s):

Water Flow ◽

Cooling System ◽

Continuous Casting Machine ◽

Casting Machine ◽

Cooling Water ◽

Transfer Model ◽

Secondary Cooling ◽

Billet Temperature ◽

Flow Rates ◽

Billet Caster

A two-dimensional heat-transfer model for transient simulation of a billets caster is presented. Its accuracy is verified through measured billet temperature and shell thickness. Billets temperature and solidification are computed by this model as a function of time varying casting speed, secondary cooling water flow rates and temperature, billet cross section, steel grade, and pouring and ambient temperatures. A control methodology and algorithm suitable for online control of 5 strands billet continuous casting machine is integrated in this model. The ability of this model to control the surface temperature profile is demonstrated through dynamic and precise adjustment of secondary cooling water flow rates. This secondary cooling system has been applied to a billet caster in Hangzhou Steel Corporation.

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Modernizing the secondary cooling system on continuous slab caster No. 2

Metallurgist ◽

10.1007/s11015-010-9262-9 ◽

2010 ◽

Vol 54 (1-2) ◽

pp. 91-92

Author(s):

E. V. Yakushev ◽

V. V. Zyryanov ◽

E. M. Alekseev ◽

S. A. Kulagin ◽

O. N. Morozov ◽

...

Keyword(s):

Cooling System ◽

Secondary Cooling ◽

Slab Caster ◽

Continuous Slab Caster ◽

Continuous Slab

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Technology Research and Application of Dynamic Secondary Cooling of Continuous Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.457-458.142 ◽

2012 ◽

Vol 457-458 ◽

pp. 142-145

Author(s):

Yi Wang ◽

Xin Jian Ma

Keyword(s):

Heat Transfer ◽

Mathematical Model ◽

Continuous Casting ◽

Cooling System ◽

Solidification Process ◽

Technology Research ◽

Secondary Cooling ◽

Dynamic Cooling ◽

Better Than ◽

Cooling Model

Secondary cooling is one of the important techniques of continuous casting. A mathematical model for heat transfer during solidification in continuous casting was established in researching on influence of the solidifying process on slab quality. The dynamic secondary cooling system has been analyzed with consideration of the principles, nozzles arrangement method and mathematical model of solidification process. The model was applied on some continuous casting machines. It indicates that the dynamic cooling model is better than conventional ones.

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