The distribution of As, Sb, Bi, Se, and Te between molten copper and white metal
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p r o d u c t i o n of b l i s t e r copper low in s e l e n i u m and t e l l u rium. The p r e s e n t work was u n d e r t a k e n to i n v e s t i g a t e the d i s t r i b u t i o n of As, Sb, Bi, Se and Te b e t w e e n liquid copper and white m e t a l as a f u n c t i o n of the i r o n content of the m a t t e (to 4 pct), and t e m p e r a t u r e . E x p e r i m e n t a l . The e x p e r i m e n t a l technique c o n s i s t e d of mixing 4-5 g of r e a g e n t g r a d e copper and 3 g of c u p r o u s sulfide with 5-6 mg of the i m p u r i t y e l e m e n t s ( r e a g e n t grade) together with f e r r o u s sulfide, and s e a l ing the m i x t u r e u n d e r v a c u u m in a f u s e d q u a r t z a m poule. (The copper and i r o n s u l f i d e s w e r e p r e p a r e d b y m e l t i n g r e a g e n t grade copper and iron powder in a graphite c r u c i b l e with an e x c e s s of e l e m e n t a l sulfur.) The ampoule was placed in a tube f u r n a c e and the m e l t was e q u i l i b r a t e d for 5 h at t e m p e r a t u r e (~0.5~ then quenched. The copper and m a t t e p h a s e s were s e p a r a t e d and a n a l y z e d for iron, s u l f u r and each m i n o r e l e m e n t . B i s m u t h was d e t e r m i n e d by a t o m i c a b s o r p t i o n . After d i s s o l u t i o n , a n t i m o n y was e x t r a c t e d into i s o - p r o p y l M. NAGAMORI, P. J. MACKEY, AND P. TARASSOFF e t h e r as r h o d a m i n e B c o m p l e x and d e t e r m i n e d s p e c t r o p h o t o m e t r i c a l l y . A r s e n i c was b a c k - e x t r a c t e d into In the continuous s m e l t i n g and c o n v e r t i n g of copper water f r o m c h l o r o f o r m and d e t e r m i n e d s p e c t r o p h o t o c o n c e n t r a t e s the b e h a v i o r of m i n o r e l e m e n t s is s i m i l a r m e t r i c a l l y as the m o l y b d e n u m blue complex. Selenium to that in the second stage of b a t c h - w i s e c o n v e r t i n g of and t e l l u r i u m were d e t e r m i n e d by X - r a y f l u o r e s c e n c e m a t t e s i n c e in both p r o c e s s e s b l i s t e r copper c o e x i s t s a f t e r r e d u c t i o n with hypophosphorous acid u s i n g a r s e n i c with white m e t a l . One i m p o r t a n t p a r a m e t e r which d e as a c o l l e c t o r . t e r m i n e s the i m p u r i t y l e v e l in the copper is the d i s t r i In some e x p e r i m e n t s the d i s t r i b u t i o n of two or t h r e e bution coefficient b e t w e e n copper and white m e t a l . F o r e l e m e n t s was d e t e r m i n e d s i m u l t a n e o u s l y . This is p e r an i m p u r i t y e l e m e n t X this is defined by: m i s s i b l e at low c o n c e n t r a t i o n s where the i n t e r a c t i o n b e t w e e n m i n o r e l e m e n t s is n e g l i g i b l e and does not affect pct X (in copper) the d i s t r i b u t i o n coefficient. L X = pct X (in white metal) R e s u l t s and d i s c u s s i o n . The e x p e r i m e n t a l r e s u l t s D i s t r i b u t i o n coefficients for s e
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