Gold and sulfur flotation separation method for sulfur-containing gold ore

The invention provides a gold-sulfur flotation separation method for sulfur-containing gold ore. The method comprises a gold-sulfur bulk flotation process, a gold-sulfur bulk concentrate regrinding process and a gold-sulfur flotation separation process, and under the synergistic effect of a specially-prepared reagent, gold and pyrite in the gold-sulfur bulk concentrate refined to the target particle size are effectively separated, so that the recovery rate of gold is remarkably increased. In the gold and sulfur flotation separation process, an efficient inhibitor CD-6 with high selectivity on pyrite and an efficient gold collecting agent B7 with high selectivity on gold are adopted, the floatability of the gold is improved while the activity of the pyrite in an ore pulp system is reduced, the recovery rate of the gold is remarkably increased, and favorable conditions are created for recovery of the gold. The problem that pyrite resources in the sulfur-containing gold ore are difficult to recover is effectivel