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How to separate arsine from an enargite pyrite ore (2 replies)

DORA DORA
3 weeks ago
DORA DORA 3 weeks ago

How to separate arsine from an enargite- pyrite ore to form arsenopyrite by flotation?

Jhuaman
3 weeks ago
Jhuaman 3 weeks ago
1 like by David

Dear Ruth

The separate As by flotation with reagent, that has enargite and arsenopyrite is difficult. Maybe the addition the NaCN and variation of pH can help, but  affect the recovery of Cu or Au.

If the process has an addition leaching-alkali could separate the As, but this not solve the problem. The tail has be insoluble in acid and easy environmental treatment.   

 Best regards

Joel

inOr
3 weeks ago
inOr 3 weeks ago
1 like by David

I certainly hope you're not trying to do what you say - make arsine from enargite.  Did you mean arsenic or arsenide?  I don't know the chemistry of the reaction you are proposing, and it must be fairly complex if one is replace the 3 coppers with enough pyrite to replace them with iron, and maintain the 1:1 ratio of arsenic in reactants and products. Perhaps native sulfur is one of the products?  If you have a reference in mind, please send it to us.  By the way, do NOT under any circumstances try to make arsine (AsH3).  It's a VERY toxic gas and cannot be allowed to escape into the environment in any form.  Don't try to incorporate it into any industrial process without elaborate safety and recovery methods to protect the lives of your plant personnel and your neighbors.  

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