关键词: 萤石, 浮选, 磨矿细度, 抑制剂

Abstract: A systematic study on process mineralogy and beneficiation technology was conducted on a low-grade，high-calcium-type fluorite ore from Kazakhstan.The fluorite content in the ore was 18.04%， while the main gangue mineral，calcite，accounted for as high as 45.28%.The two minerals exhibited simi⁃ lar floatability and complex intergrowth relationships，making their separation particularly challenging.Un⁃ der the condition of a grinding fineness of 70%passing 0.074 mm，using ZH-T01 as a regulator，ZH-Y02 as a depressant，and oleic acid as a collector，a closed-circuit flotation process consisting of one rough ⁃ ing，seven cleaning，and two scavenging stages was employed.The obtained fluorite concentrate had a CaF₂ grade of 97.08%with a recovery of 87.24%，while the CaCO ₃content was reduced to 0.89%，meeting the quality requirements for acid-grade fluorite powder.The research results provide a feasible technical path ⁃ way for the efficient utilization of such resources.

Key words: fluorite, flotation, grinding fineness, depressant