Froth Floatation

2,878 views

Published on

Froth Floatation Process

Published in: Technology, Business
1 Comment
2 Likes
Statistics
Notes
  • Can you improve the Cu content of low grade copper to hight grade when you subject them to floatation process
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
2,878
On SlideShare
0
From Embeds
0
Number of Embeds
19
Actions
Shares
0
Downloads
82
Comments
1
Likes
2
Embeds 0
No embeds

No notes for slide
  • What are the most obvious uses for copper – we use it every day. Electrical wiring, plumbing and coins. 15% is recycled copper, the rest is made from reduction of minerals in copper ores.
  • Froth Floatation

    1. 1. Copper from deep in the ground. SL M2.
    2. 2. Five stages: <ul><li>Open Pit mining </li></ul><ul><li>Pit crusher 0.6% Cu </li></ul><ul><li>Froth floatation 30% Cu </li></ul><ul><li>Smelting 90.4% Cu </li></ul><ul><li>Electrolytic refining 99.98% Cu </li></ul>
    3. 3. chalcopyrite azurite malachite
    4. 4. CuFeS 2 = chalcopyrite. % Cu in pure chalcopyrite?
    5. 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. 6. Open Pit mining. Bingham Canyon Low grade copper Quantities huge Shavings tested Dynamite used Waste to tips
    7. 7. Open Pit mining. <ul><li>Noisy </li></ul><ul><li>Dusty </li></ul><ul><li>Leaves Open Pits </li></ul><ul><li>Waste tips. </li></ul>
    8. 8. Pit crusher
    9. 9. Pit crusher 0.6% Cu 2.5cm pieces
    10. 10. Froth Floatation
    11. 11. Froth Floatation
    12. 12. Froth Floatation Collector (oil) molecules attach themselves to the chalcopyrite grains. The grains are now water-repellent. Air bubbles attract the grains. Froth produced and is pumped away to smelter. <ul><li>Detergent </li></ul><ul><li>Oil </li></ul><ul><li>Water </li></ul><ul><li>Tailings </li></ul>0.6% 30% concentrating
    13. 13. Smelting <ul><li>First stage involves </li></ul><ul><ul><li>Silica </li></ul></ul><ul><ul><li>Oxygen </li></ul></ul><ul><ul><li>Concentrate </li></ul></ul><ul><li>Cu 2 S made </li></ul><ul><li>Most important stage involves Cu 2 S / air / furnace </li></ul><ul><li>Cu 2 S(l) + O 2 (g)  2Cu(l) + SO 2 (g) </li></ul>
    14. 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. 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. 16. Smelting Sulphur dioxide made. 30% 99.4% Acid rain Lakes Trees H 2 SO 4
    17. 17. Electrolytic Refining 99.4% 99.98% The copper anodes are already 99.4% copper! The copper cathodes will be 99.98% copper!
    18. 19. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu 2+ Cu Cu Cu 2+ Cu Cu 2+
    19. 20. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu Cu Cu 2+ Cu Cu 2+ <ul><li>Describe what is happening at the anode. </li></ul><ul><li>Write an equation. </li></ul><ul><li>Is this oxidation or reduction? </li></ul>
    20. 21. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu 2+ Cu Cu Cu 2+ Cu Cu 2+ <ul><li>Describe what is happening at the cathode. </li></ul><ul><li>Write an equation. </li></ul><ul><li>Is this oxidation or reduction? </li></ul>
    21. 22. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu Cu Cu 2+ Cu Cu 2+ <ul><li>Write an equation. </li></ul><ul><li>Cu(s)  Cu 2+(aq) + 2e - </li></ul><ul><li>Is this oxidation or reduction? </li></ul><ul><li>Oxidation </li></ul>
    22. 23. e - e - Cu e - e - Anode + - Cathode Cu 2+ Cu 2+ Cu Cu Cu 2+ Cu Cu 2+ <ul><li>Write an equation. </li></ul><ul><li>Cu 2+ (aq) + 2e -  Cu(s) </li></ul><ul><li>Is this oxidation or reduction? </li></ul><ul><li>Reduction </li></ul>
    23. 24. Five stages: <ul><li>Open Pit mining </li></ul><ul><li>Pit crusher </li></ul><ul><li>Froth floatation </li></ul><ul><li>Smelting </li></ul><ul><li>Electrolytic refining </li></ul>

    ×