Abstract: In order to effectively utilize fluorite from a tungsten tailings in Jiangxi Province,based on the properties of the tailings,the beneficiation process of pre-enrichment fluorite by high-intensity magnetic separation tailing discarding and highefficiency enrichment by flotation was determined to carry out comprehensive recovery tests. After the preconcentration of tailing samples with " one roughing and one cleaning" high gradient high-intensity magnetic separation,fluorite and calcite were enriched to non-magnetic products and high-intensity magnetic medium ore. The cumulative recovery rates of CaF2 and CaCO3 reached 94. 82% and 94. 77%,respectively,while the grade of CaF2 and CaCO3 of high intensity magnetic products decreased to 3. 29% and 2. 96%,respectively. The non-magnetic product and high-intensity magnetic medium ore were combined into flotation feeding for carrying out the reagent system research. The condition test confirmed that GYSH was used as silicon mineral inhibitor,and the appropriate dosage was 3 000 g / t. GY51 was used as carbonate mineral inhibitor,and the appropriate dosage was 150 g / t. The suitable dosage of GYOZ as a fluorite collector is 150 g / t. Under the conditions of suitable reagent system, fluorite concentrate with CaF 2 grade of 96. 37%,CaF2 recovery rate of 84. 58% and CaCO3 content of 1. 57% was obtained in the closed-circuit test of the whole process. The developed process flow and reagent system can greatly reduce the flotation treatment amount of fluorite,realize the efficient recovery of fluorite,and provide a technical basis for the utilization of the same type of tungsten tailings.

Key words: fluorite, calcite, high-intensity magnetic separation pre-enrich, inhibitor, high-efficiently collector, flotation separation