Lime improves flotation process of AF foam pump for gold ore
In the flotation process of quartz vein ore containing gold, adding a small amount of lime can improve the mixed flotation for three reasons. First, without lime, the pulp is weakly acidic, which reacts with sulfide to form acid salt. At the same time, a large number of quartz gangue can also make the pulp star weakly acidic. Adding a proper amount of lime to neutralize the weak acid pulp to make it weak alkaline, which is beneficial to the collection of xanthate. For ores with high sulfur content and high oxidation degree, more lime is needed to improve flotation process. Second, No. 2 oil has weak foaming property in weak acidic medium, and its foaming ability is good in weak alkaline pulp. Its effective composition is standing alcohol, which belongs to alcohol foaming agent. Therefore, some experienced technicians and operators feel that adding small amount of lime can produce a more thick foam layer, and if too much lime is used, the flotation froth will be too sticky. Third, a small amount of AF foam pump can also coagulate the sludge, which is conducive to the formation of a more stable foam layer.