TACKLING IMPURITIES IN COPPER CONCENTRATES
HighGrade Cu 35 17 2 The higher copper grade material with the higher bismuth content was borniterich. The associated mineralogy of the two concentrate materials was examined in detail by Process Mineralogical Consulting Ltd. and from this work the bismuthbearing mineralogy was estimated to be as follows: Table 7 Bismuth Mineralogy in Concentrates under Study Mineral Formula Mid .