Vol.28 No.2 刘国平等：圆坯连铸结晶器电磁搅拌数学模拟 ·123· state.Metall Trans A,1991.22A:957 1994,39(5):173 [7]Kirkwood D H.Semi-solid metal processing.Int Mater Rev, Numerical simulation on the electromagnetic field of round billet continuous casting moulds in electromagnetic stirring process LIU Guoping2),TIAN Naiyuan,WU Yaoguang2),WANG Guocai2) 1)Metallurgical and Ecological Engineering School,University of Science and Technology Beijing.Beijing 100083.China 2)Maanshan Iron Steel Co.Ltd.,Maanshan 243001,China ABSTRACT Electromagnetic stirring process for the round billet mould (450 mm in diameter)in No.1 Steelmaking Plant of Maanshan Steel in China was analyzed by using mathematical simulation.Orderliness was found out in order to optimize flow path in the round billet mould and make certain reasonable casting parameters.Computational results of electromagnetic stirring process indicated that the magnetic field in- tensity increases with the stirring frequency decreased and the stirring electric current increased.The elec- tric current intensity does not change magnetic field distribution.The characteristic of magnetic field along the mould vertical direction is strong in the middle and weak at the end of the mould.The optimized pro- cessing parameters are the stirring electric current of 350 A and the stirring frequency of 2 Hz. KEY WORDS electromagnetic stirring;electromagnetic field;flow path;numerical simulationV lo 。 2 8 N o 。 2 刘国平等 : 圆坯连铸结晶器电磁搅拌数学模拟 12 3 · s t ta e . M e加 1 T r a l s A , 19 9 1 , 2 2 A : 9 5 7 K i r k w o d D H S ~ 一阳h d m et al p or e es i ng . 1吐 M a t e r R e v , 1 9 94 , 3 9 ( 5 ) : 1 7 3 [ 7 ] N u m e r i e a l s i m u l a t i o n o n t h e e l e e t r o m a g n e t i e fi e ld o f r o u n d b i ll e t e o n t i n u o u s e a s t i n g m o u ld s i n e l e e t r o m a g n e t i e s t i r r i n g P r o e e s s 毛l u uG o户艺n g l , 2 ) , T IA N 场泛洲 a n l ) , w u 介咭 u a n g Z ) , w A N G G u o ca i Z ) 1 ) M e r a l u r g i e己 an d E e ol g i e al E昭i n e r i飞 cS h o l , U n i v e r s i t y o f cS ien e e a n d T ce h n o l o g y B e ij i n g , Be ij i n g 1 0 0 0 8 3 , C h i n a 2 ) M an s h a n I or n & S t e l oC . L t d . , Man s h an 2 4 3 0 0 1 , C h ina A B S T R A C T E l e e t ro m a g n e t i e s t i r r in g p ro e e s s fo r t h e r o u n d b i ll e t mo u l d ( 4 5 0 m m in d i am e t e r ) i n N o . 1 S t e e lm a k i n g P l a n t o f M a a n s h a n S t e e l i n C h i n a w a s a n a l y z e d b y u s i n g m a t h e m a t i e a l s im u l a t i o n . O r d e r li n e s s w as fo u nd o u t i n o r d e r to o P t im i z e f lo w P a t h in t h e r ou n d b i ll e t m o u ld a n d m ak e e e r t a i n r e a son ab l e e a s t i n g p a r a m e t e r s . oC m p u t a t i o n a l r e s u l t s o f e l e e t r o m a g n e t i e s t i r r i n g p ro e e s s i n d i e a t e d t h a t t h e m昭n e t i e f i e ld i n - t e n is t y i n e r e a s e s w i t h t h e o t i r r i n g f r e q u e nc y d e e r e ase d an d t h e s t i r r i n g e l e e t r i e e u r r e nt i n e r e a s e d . T h e e l e e - t r i e e u r r e n t i n t e n s i t y d o e s n o t e h a n g e m a g n e t i e f i e ld d i s t r i b u t i o n . T h e e h a r a e t e r i s t i e o f m a g n e t i e fi e ld a l o n g t h e m o u ld v e r t i e al d i r e e t i o n 1 5 s t r o ng i n t h e m i d d l e an d w e ak at t h e e n d of t h e mo u ld . T h e o P t i m i z e d p ro - e e s s i n g P a r a m e t e rs a r e t h e s t i r r i n g e l e e t r i e e u r re n t o f 3 50 A a n d t h e s t i r r i n g f r e q u e n e y o f 2 H z . K E Y WO R D S e l e e t r o m a g n e t i e st i r r i n g ; e l e e t r om a g n e t i e fi e ld ; f l o w P a t h ; n u m e r i e al s im ul at i o n