A First Attempt to Implement a Swirl Blade in Production of Ingots

被引：17

作者：

Hallgren, Liue ^{[1
,2
]}

Tilliander, Anders ^{[2
]}

Yokoya, Shinichiro ^{[2
]}

Jonsson, Par G. ^{[2
]}

Hagman, Solve ^{[3
]}

机构：

[1] Outokumpu Stainless Avesta Works, SE-77480 Avesta, Sweden

[2] Royal Inst Technol KTH, Div Appl Proc Met, SE-10044 Stockholm, Sweden

[3] Ovako Bar, SE-81335 Hofors, Sweden

来源：

ISIJ INTERNATIONAL | 2010年 / 50卷 / 12期

关键词：

swirl; ingot; casting; modeling; plant trials; IMMERSION NOZZLE; FLOW PATTERN; HEAT;

D O I：

10.2355/isijinternational.50.1763

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Plant trials were carried out to test if it would be possible to place a ceramic swirl blade in the runner channel during filling of ingots The initial experiments showed that no production disturbances were found More specifically no problems with unusual refractory wear or cracks in the refractory were found Thus it was concluded that the use of swirl blade has a potential in the future to be used to influence the initial filling conditions Also mathematical modeling was done in order to illustrate how it was possible to improve the layout of the runner system in order to increase the potential for use of swirl for the current plant conditions The results showed that the meniscus was not dampened as much when the swirl blade is positioned in a horizontal direction in the runner channel compared to the results of a previous physical modeling study where the swirl blade was placed in a vertical direction just before the steel entered the mold However if a horizontally positioned swirl blade is used in combination with an inlet with an angle of 15 degrees the hump height at the initial filling stage can be lowered from 100 to 58 mm compared to a case without a swirl blade This illustrates the potential to apply mold powder closer to the bottom without risking reoxidation due to reactions with steel and mold powder

引用

页码：1763 / 1769

页数：7

共 12 条

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