METHOD FOR FLOTATION OF CALCITE IN THE PROCESS OF ENRICHMENT OF FELDSPAR CONTAINING NEPHELINE SYENITES Russian patent published in 2022 - IPC B03D1/02 

FIELD: mineral processing.

SUBSTANCE: proposed invention relates to the field of mineral processing, in particular to flotation methods of enrichment, and can be used in the purification of ores from calcite by flotation (in particular, in the enrichment of feldspar raw materials). Method for flotation of calcite in the process of beneficiation of feldspar containing nepheline syenites includes crushing of feldspar raw materials, its grinding, desliming and subsequent flotation in an alkaline medium with the addition of a depressant. Flotation is carried out with the addition of a collecting reagent, which is an alkaline salt of anacardic acid or an ammonium salt of anacardic acid in an amount of 50-500 g/t of feldspar raw materials. The alkaline salt of anacardic acid or the ammonium salt of anacardic acid is administered as a preferably 1% aqueous solution. Liquid glass is used as a depressant. As the alkaline salt of anacardic acid, the potassium salt of anacardic acid is taken. As the alkaline salt of anacardic acid, the sodium salt of anacardic acid is taken. An alkaline environment is created by adding soda ash until a pH of 9.1-9.3 is reached.

EFFECT: increasing the efficiency of the calcite flotation process.

6 cl, 1 tbl, 10 ex