In the separation of barite and fluorite, they are generally first mixed and floated together, followed by separation. During mixed flotation, oleic acid is used as the collector, and sodium silicate is used as the depressant. The separation of the mixed concentrate can be achieved by the following two methods:
1.Inhibit barite with starch or tannin and iron salt, and float fluorite with oleic acid.
2.Float barite with hydrocarbon-based sulfate ester and leave fluorite in the tank.
When oleic acid is used as the collector, fluorite has good floatability. The pH value of the pulp has a significant impact on the flotation of fluorite. When oleic acid is used as the collector, the pH value of the pulp is preferably between 8 and 11 for better floatability. Additionally, increasing the temperature of the pulp can improve the flotation indicators. When using oleic acid as the collector for fluorite, there are also higher requirements for the quality of water, which needs to be pre-softened.
In addition to oleic acid, hydrocarbon-based sulfate esters, alkyl sulfonated amber amines, oleic acid amine sulfonate sodium, and other sulfates and amines can also be used as collectors for fluorite. Modifiers such as sodium silicate, sodium pyrophosphate, lignin sulfonate, and starch can be used.
