Hydrodynamic Lubrication during Non-Sinusoidal Oscillation for a Continuous Casting Mould

2014 ◽  
Vol 789 ◽  
pp. 362-369 ◽  
Author(s):  
Jie Yang ◽  
Xiang Ning Meng ◽  
Miao Yong Zhu
Keyword(s):  
Continuous Casting ◽  
Hydrodynamic Lubrication ◽  
Analytical Calculation ◽  
Sinusoidal Oscillation ◽  
Cold Model ◽  
Experimental Apparatus ◽  
Cyclic Movement ◽  
Flux Consumption ◽  
Continuous Casting Mould ◽  
Mixed Oil

A hydrodynamic lubrication model of a flux channel was established for a continuous casting mould with non-sinusoidal oscillation. A new experimental apparatus was developed simultaneously for analysing the lubrication mechanism. A mixed oil, which was simulated mould flux, was poured and infiltrated into the channel, and the flux consumption was determined in the process of oscillation. Based on the combination of analytical calculation and cold model experiment, the flux channel is divided into two parts to clarify the behaviours of flux infiltration and shell deformation. The results show that oscillation marks and surface cracks are formed at the bottom of the meniscus during the negative and positive strip time respectively. Meanwhile, the liquid flux is periodically infiltrated into the channel by negative pressure below the meniscus because the cyclic movement of the shell lags behind the mould oscillation. The casting performances were improved by increasing the non-sinusoidal oscillation factor.

Effect of Non-Sinusoidal Oscillation Parameters on Mold Flux Consumption Rate

2011 ◽  
Vol 66-68 ◽  
pp. 185-188
Author(s):  
Hong Ming Wang ◽  
Ting Wang Zhang ◽  
Yong Qi Yan ◽  
Bang Min Song ◽  
Gui Rong Li
Keyword(s):  
Mathematical Model ◽  
Continuous Casting ◽  
Mold Flux ◽  
Consumption Rate ◽  
Sinusoidal Oscillation ◽  
Continuous Casting Mold ◽  
Casting Mold ◽  
Mold Oscillation ◽  
Flux Consumption

According to the rule of non-sinusoidal oscillation of continuous casting mold, a mathematical model was established to study the effects of oscillation parameters on the consumption rate of mold flux. The results indicated that the mold flux consumption rate is remarkably affected by the non-sinusoidal factor. This proves that the non-sinusoidal oscillation of mold contributes to increase the flux consumption. Moreover, the amplitude and frequency of mold oscillation have effects on mold flux consumption rate. The non-sinusoidal oscillation parameters must be optimized.

Modeling and Optimization of Mould Non-Sinusoidal Oscillation Process

2011 ◽  
Vol 291-294 ◽  
pp. 3060-3063
Author(s):  
Hong Ming Wang ◽  
Bo Feng Yang ◽  
Bang Min Song ◽  
Ting Wang Zhang ◽  
Yong Qi Yan
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Oscillation Frequency ◽  
Oscillation Amplitude ◽  
Sinusoidal Oscillation ◽  
Modeling And Optimization ◽  
Oscillation Process ◽  
Continuous Casting Mould ◽  
Factor Α

A model on non-sinusoidal oscillation of continuous casting mould was established to study the pressure in flux channel. The effects of oscillation parameters on the pressure in flux channel were researched. The non-sinusoidal oscillation parameters were optimized. When the casting speed is 1.8 m·min-1, the optimized oscillation parameters are: non-sinusoidal factor (α) is 0.198, oscillation amplitude (s) is ±4mm and oscillation frequency (f) is 165min-1. When the casting speed is 2.0 m·min-1, the optimized oscillation parameters are: α is 0.186, s is ±4.5mm and f is 155min-1. These optimized oscillation parameters are proved applicable in practice.

scholarly journals Comparison of Four Models of Radiative Heat Transfer Between Flat Surface to Evaluate the Temperature Field Based on Example of the Continuous Casting Mould

2015 ◽  
Vol 60 (1) ◽  
pp. 209-213
Author(s):  
M. Rywotycki ◽  
Z. Malinowski ◽  
K. Miłkowska-Piszczek ◽  
A. Gołdasz ◽  
B. Hadała
Keyword(s):  
Heat Transfer ◽  
Continuous Casting ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Casting Process ◽  
Cooling Zone ◽  
The Finite Element Method ◽  
Cast Slab ◽  
Continuous Casting Mould ◽  
Heat Transfer By Radiation

AbstractThe paper presents the results of research concerning the influence of radiative heat transfer on the strand and mould interface. The four models for determining the heat transfer boundary conditions within the primary cooling zone for the continuous casting process of steel have been presented. A cast slab - with dimensions of 1280×220 mm - has been analysed. Models describing the heat transfer by radiation have been specified and applied in the numerical calculations. The problem has been solved by applying the finite element method and the self-developed software. The simulation results, along with their analysis, have been presented. The developed models have been verified based on the data obtained from the measurements at the industrial facility.

Continuous casting mould for square steel billet optimised by solidification shrinkage simulation

2010 ◽  
Vol 37 (5) ◽  
pp. 341-346 ◽  
Author(s):  
T. M. Wang ◽  
S. W. Cai ◽  
J. Xu ◽  
Y. Y. Du ◽  
J. Zhu ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Solidification Shrinkage ◽  
Steel Billet ◽  
Continuous Casting Mould

scholarly journals The volatilization behaviour of typical fluorine-containing slag in steelmaking

2020 ◽  
Vol 7 (8) ◽  
pp. 200704
Author(s):  
Zhongyu Zhao ◽  
Junxue Zhao ◽  
Zexin Tan ◽  
Boqiao Qu ◽  
Yaru Cui
Keyword(s):  
Continuous Casting ◽  
Eutectic Point ◽  
Slag System ◽  
Refining Slag ◽  
Performance Control ◽  
Second Stage ◽  
Mould Flux ◽  
And Performance ◽  
Continuous Casting Mould ◽  
Two Stages

It was taken as typical steelmaking fluorine-containing slag systems with the remelting electroslag, continuous casting mould flux and refining slag. The volatilization behaviour of each slag system was analysed by thermogravimetric (TG) and mass spectrometry (MS) detection. The results showed that the remelting electroslag volatilized significantly above 1300°C and the volatiles were mainly CaF 2 , MgF 2 with a small amount of SiF 4 and AlF 3 ; the continuous casting mould flux volatilization was divided into two stages, in the first stage (500°C∼800°C), CaF 2 and Na 2 O reacted to form NaF, and in the second stage (greater than 1200°C), the CaF 2 evaporation was highlighted; for CaF 2 -CaO-based refining slag, the volatilization was the most significant at the eutectic point 84% CaF 2 –16% CaO, and the volatility can be reduced by adding 5% SiO 2 . This research will be guiding significance for the composition and performance control of fluorine-containing slag and metallurgical environmental protection in the steelmaking process.

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