Thus, less powerful but more selective flotation collector such as potassium amyl xanthate (PAX) was used for sphalerite flotation.
potassium ethyl xanthate (PEX), potassium isopropyl xanthate (PIPX), potassium butyl xanthate (PBX) and potassium amyl xanthate (PAX) were tested for the flotation of galena and sphalerite in the preliminary trials.
Table 4 represent the optimum reagent consumption for lead flotation as 70 g/t potassium ethyl xanthate, 300 g/t sodium silicate, 150 g/t sodium cyanide, 30 g/t of polyglycol and Table 6 for zinc flotation as 80 g/t potassium amyl xanthate, 400 g/t copper sulphate, 300 g/t sodium silicate, 40g/t of polyglycol at rougher flotation stage.
Z-14, sodium isobutyl xanthate, is an energetic collector useful in scavenger circuits, while Z-6, potassium amyl xanthate
, is the most powerful and least selective collector.
Figure 4 shows, for an Arizona chalcopyrite ore, a fairly typical set of comparable Cu recovery, rougher grade, and pyrite content data produced by MRI S-701, MRI C-211, MRI F-100, and potassium amyl xanthate
A stronger reagent, potassium amyl xanthate
, enters the process flow at the base of the rougher column.
The reagent suite is standard potassium amyl xanthate (200 g/t) collector and methyl isobutyl carbonyl (MIBC) frother (80 g/t).
3~ and is treated with a standard reagent suite of potassium amyl xanthate and MIBC.
Thus ethyl xanthate is weaker than amyl xanthate
, yet more selective.
Acid pressure oxidation tests were conducted on a bulk flotation concentrate containing 86% of the gold [concentrate produced with Cyanimide A-208 (sodium diethyl and sodium di-secondary butyl dithio-phosphate), potassium amyl xanthate
, copper sulfate and frother] at 20% solids, 220 [degrees] C, and with 50 lb/in.