Abstract: For quartz-type fluorite ore with CaF₂ content of 47.48% and SiO₂ content of 39.70%, it is difficult to obtain a good selection index using a conventional fluorite flotation collector of sodium oleate in a low-temperature pulp environment. In order to improve the flotation effect of the fluorite ore at low temperature, flotation experiments were conducted using sodium petroleum sulfonate collector (PSK-13) with good low-temperature resistance. The results showed that the CaF₂ grade of 98.57% and the FC-98 fluorite concentrate recovery of 75.02% could be obtained by the process of "closed flotation circuit of one roughing, six cleaning and middling returned cyclically" with the regulator of sodium carbonate, the depressant of water glass and the collector of PSK-13 when the pulp temperature is 5 ℃, which provided a technical reference for the low-temperature flotation. The results of the adsorption amount experiment showed that the adsorption amount of PSK-13 fluorite on the surface changed little and is greater than the adsorption amount of sodium oleate from 5 ℃ to 30 ℃, showing the good performance of low-temperature collection.