Froth Floatation Process

1. Copper from deep in the ground. SL M2.

3. chalcopyrite azurite malachite

4. CuFeS 2 = chalcopyrite. % Cu in pure chalcopyrite?

5. CuFeS 2 Mr = 64+56+32+32 = 184 % by mass = mass of element in 1 mole of compound x 100 Mr of compound % by mass = 64 x 100 = 35% 184

6. Open Pit mining. Bingham Canyon Low grade copper Quantities huge Shavings tested Dynamite used Waste to tips

8. Pit crusher

9. Pit crusher 0.6% Cu 2.5cm pieces

10. Froth Floatation

11. Froth Floatation

14. Cu 2 S + O 2  2Cu + SO 2 0 -2 -2 +4 +1 0 O S Cu Oxidised or reduced? reduced oxidised reduced What mass of copper could be obtained by reducing 1kg of copper (I) sulphide?

15. Cu 2 S + O 2  2Cu + SO 2 What mass of copper could be obtained by reducing 1kg of copper (I) sulphide? 160 128 Moles in 1kg 1 mol 2 mol Mass in question Mass in Underline 0.800kg

16. Smelting Sulphur dioxide made. 30% 99.4% Acid rain Lakes Trees H 2 SO 4

17. Electrolytic Refining 99.4% 99.98% The copper anodes are already 99.4% copper! The copper cathodes will be 99.98% copper!

19. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu 2+ Cu Cu Cu 2+ Cu Cu 2+