The substitution energies of iron and arsenic atoms are negative, indicating that copper substitution by iron and antimony substitution by arsenic can proceed spontaneously under ambient temperature and pressure. This is consistent with the fact that tetrahedrite in the nature generally contains arsenic and iron.
2014111Arsenic problems in copper flotation. As metal reserves around the world, and existing mines, get deeper, ore mineralogy is becoming increasingly more complex. In addition, penalty elements such as arsenic, antimony and bismuth are occurring in increasing concentrations.
antimony 30.68%, lead 1.52% and arsenic 0.85% was obtained without an depressant in a Denver flotation cell. The addition of a depressant resulted in a concentrate with antimony
198781In this series of experiments, some preferential removal of arsenic was noticed at low Fe additions the recovery of arsenic by flotation was indeed found to be of the order of 90%, while that of germanium increased from around 60 to 83% when the amount of added ferric hydroxide was increased from 60 to 160 ppm (expressed as Fe3+) and that of sodium oleate from 15 to 40 ppm.
antimony floatation process. the changes in concentrations of antimony, lead and arsenic during this research. Index Termsantimonite, arsenic, froth flotation, lead. I. INTRODUCTION The froth flotation process is used for ore concentration by utilizing the physiochemical differences among mineral particles.
416Starting with an containing antimony (5.89%), lead (0.34%) and arsenic (0.25%) a concentrate containing antimony 30.68%, lead 1.52% and arsenic 0.85% was obtained without an depressant in a Devnver flotation cell. The addition of a depressant resulted in a concentrate with antimony 24.89%, lead 0.90% and arsenic 5.89%.
422The reagent does not affect the flotation of antimony sulfides stibnite and species such as the sulfides of bismuth, tin, arsenic and lead and complexes of the aforementioned. The quantity of zinccyanide reagent used in practicing the invention will depend, of course, on the concentration of minerals which are to be depressed.
Preoxidation of flotation pulp using oxidizing agents or aeration conditioning represents a simple approach in arsenic removal and was found effective in many cases. Selective flotation of arsenic minerals through E h control has made significant advances in
630My speculation is that the arsenic is present as arsenopyrite and oxide because after tests the recovery of antimony and arsenic were 75% and 36% respectively. And the composition of concentrate for Sb and As is 52% and 2.63% As indicating that the arsenic and antimony are upgraded (ore composition 10% Sb and 0.78% As).
Starting with an containing antimony (5.89%), lead (0.34%) and arsenic (0.25%) a concentrate containingantimony 30.68%, lead 1.52% and arsenic 0.85% was obtained