The collectors performance was evaluated at three concentrations:
1 104 mol/L, 5 105 mol/L, and 1 105 mol/L. The collectors
conditioning time was one minute. The performance of corn
starch was checked at a concentration range between 10 mg/L and
400 mg/L. The depressant conditioning time was 2 min. The froth
collection time was determined after kinetic experiments, and
established at 5 min for the tests using EDA and DTAB, and 2 min
for the tests using AQ142. These experiments were done at pH values
close to 4, 6, 8 and 10.