Phase equilibria in the pyrometallurgy of sulfide ores
- PDF / 1,672,181 Bytes
- 15 Pages / 614.28 x 794.28 pts Page_size
- 20 Downloads / 193 Views
Phase Equilibria in the Pyrometallurgy of Sulfide Ores
T E R K E L ROSENQVIST
Although r e a c t i o n k i n e t i c s and p r o c e s s d y n a m i c s m a y g r e a t l y affect the e n g i n e e r i n g of p y r o m e t a l l u r g i c a l p r o c e s s e s , the l i m i t s of what c a n be a c h i e v e d a r e s e t by the e q u i l i b r i u m r e l a t i o n s . A f t e r a d i s c u s s i o n of s o m e e x p e r i m e n t a l t e c h n i q u e s this l e c t u r e r e v i e w s the p h a s e e q u i l i b r i a that a r e of i m p o r t a n c e for the r o a s t i n g and s m e l t i n g of s o m e i m p o r t ant s u l f i d e o r e s . The q u a t e r n a r y s y s t e m s Z n - F e - S - O and C u - F e - S - O u n d e r r o a s t i n g cond i t i o n s a r e t r e a t e d in d e t a i l as f u n c t i o n s of c o m p o s i t i o n , t e m p e r a t u r e and oxygen p o t e n t i a l . F i n a l l y the use of c a l c i u m oxide as a n a b s o r b e n t for s u l f u r as well as a m e a n s to modify r o a s t i n g and r e d u c t i o n p r o c e s s e s for copper and i r o n s u l f i d e s is d i s c u s s e d .
IN
giving this l e c t u r e for the 1978 a n n u a l m e e t i n g of the AIME I have to r e c a l l that last s u m m e r was e x a c t l y t h i r t y y e a r s s i n c e I f i r s t c a m e to the N o r t h A m e r i c a n c o n t i n e n t as a r e s e a r c h fellow with the Ins t i t u t e for the Study of M e t a l s , us it was c a l l e d at that t i m e , in Chicago. Knowing that I would be f r e e to work on any s u b j e c t I liked, p r o v i d e d it had s o m e vague r e l a tion to m e t a l s I had, b e f o r e I left Norway, d i s c u s s e d v a r i o u s p o s s i b i l i t i e s with a n older c o l l e a g u e . I ' w a n t e d to work on oxygen in liquid s t e e l and deoxidafion e q u i l i b r i a , but was a d v i s e d a g a i n s t it. " O x y g e n is so difficult to a n a l y z e f o r . Why d o n ' t you w o r k on s u l f u r i n s t e a d . " As a r e s u l t of this advice I can today look back on what I will c a l l a t h i r t y y e a r s w a r with f i r e and b r i m s t o n e . Although d e s u l f u r i z a t i o n of i r o n and s t e e l is a v e r y i m p o r t a n t s u b j e c t , w h e r e a g r e a t deal of r e s e a r c h has b e e n done, and when t h e r e s t i l l a r e p r o b l e m s to solve, I will, in this a u d i e n c e of m a i n l y n o n f e r r o u s The Extractive Metallurgy Lecture was authorized in 1959 to provide an outstanding man in the field o f nonferrous metallurgy as a lecturer at the annual AIME meeting. TERKEL ROSENQVIST, born in Oslo, Norway, was awarded the Doctorate of Science in 1954 from the Norwegian Institute of Technology. He has been Professor of Extractive Metallurgy there since 1955. He was a Research Fellow in the Institute for the Study of Metals at the University of Chicago in 1947 and METALLURGICAL
TRANSACTIONS B
m e t a l l u r g i s t s , t a l k about p r o b l e m s in c o n n e c t i o
Data Loading...
