Abstract: The CaF2 grade of a fluorite ore in Ruoqiang County，Xinjiang is 26.15%，with CaCO3 content as high as 47.58%，making it a typical ultra-high calcium carbonate-type fluorite ore. Based on the ore properties，systematic research on the beneficiation process was conducted. Under the condition that the grinding fineness of the raw ore is 66.56% passing 0.074 mm，using soda ash as the regulator， SSB and FT-1 as depressants，and CYP-02 as the collector，a process consisting of one roughing，eight cleanings，and two scavengings was adopted. Closed-circuit tests of the entire process yielded fluorite con⁃ centrate with yield of 22.89%，CaF2 grade of 97.46%，and recovery rate of 85.41%. This achieves the effi⁃ cient recovery and utilization of high-calcium carbonate-type fluorite resources and provides a feasible ap⁃ proach for the beneficiation of similar ores.

Key words: calcium carbonate fluorite ore, flotation, SSB, FT-1, GYP-02