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LIBERATION, SEPARATION, EXTRACTION. STAGE 1 - Blasting STAGE 2 - Primary Crushing STAGE 3 - Secondary Crushing STAGE 4 - Grinding STAGE 5 - Separation by size STAGE 6 - Separation by values STAGE 7 - Extraction of values. What is an Ore?. Mineralized rock that can be mined/processed
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LIBERATION, SEPARATION, EXTRACTION STAGE 1 - Blasting STAGE 2 - Primary Crushing STAGE 3 - Secondary Crushing STAGE 4 - Grinding STAGE 5 - Separation by size STAGE 6 - Separation by values STAGE 7 - Extraction of values
What is an Ore? • Mineralized rock that can be mined/processed • At a time (temporal) • At a place (spatial) • At a profit (economic) • Waste rock can become an ore • Tailings can become an ore
Drilling and Blasting • Create a top size suitable for transportation • Begin the process of Liberation • Factors • Drill hole diameter • Drill hole spacing and pattern • Explosive type • Delay system
Influence of Blasting Practices S. Morrell and W. Valery, 2001. “Influence of Feed Size on AG/SAG Mill Performance”. SAG 2001, Vancouver, Canada, pp203-214 Morrell, S., 2003. “The Influence of Feed Size on Autogenous and Semiautogenous Grinding and the Role of Blasting in its Manipulation”, Proc. 22nd International Mineral Processing Congress, Eds.: L.Lorenzen and D.J. Bradshaw, p.526-533.
Influence of Blasting Practices S. Morrell and W. Valery, 2001. “Influence of Feed Size on AG/SAG Mill Performance”. SAG 2001, Vancouver, Canada, pp203-214 Morrell, S., 2003. “The Influence of Feed Size on Autogenous and Semiautogenous Grinding and the Role of Blasting in its Manipulation”, Proc. 22nd International Mineral Processing Congress, Eds.: L.Lorenzen and D.J. Bradshaw, p.526-533.
Order of Processing Blasting Primary Crushing Secondary Crushing Grinding Regrinding
Grinding Mills Rod Mill – opened up for maintenance Ball Mill – overflow type
Grinding Mills Bingham Canyon Grinding Mills
Grinding and Cyanide Leaching Musslewhite Mine, Ontario