Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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NaHS Sodium Hydrosulphide vs Oxidised sulphides in Au Floats (1 reply)

W
Floatsumcon
7 years ago
Floatsumcon 7 years ago

Thanks in Advance. Currently facing float recovery issues with a long term stockpile having patches of medium / heavy oxidation of sulphides in gold ore. head grade 1.8 - 2.8g/t. Ore is  presenting black sediments ( gold in carbon)   @ 20 - 25% with sulphide stringers (BS type 3.) Currently determining carbon type.  Silicification also present. Float circuit operating @ 30% Sols with PAX dosing 28%strenght  @ 190g/t  plus 20g/t A208 fine gold collector. 30g/t CuSo4  has been increased to 40g/t.  MIBC dosing @ 28 - 30g/t pending residence time.  Recoveries inconsistent @  75 - 90%.

Has anyone had success with NaHS  as a sulphadiser  for similar issues ? Possible dosing rates ?

Thanks again.

  Regards Floatsumcon.

 

 

David
7 years ago
David 7 years ago
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It depends on your ore.  ORP drives it. In the laboratory, this have worked for me:

read this also https://www.911metallurgist.com/froth_flotation/controlled-potential-sulphidisation-cps-demand

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