The Impact of Slurry Temperature on Fluorite Flotation Indices The Petroliev method, commonly used in the flotation of domestic fluorite, is inconvenient to operate, consumes a large amount of energy, and is costly, making it unsuitable for production in small local mines. To address this issue, this experiment employed a normal temperature flotation method for separating fluorite minerals. The test results show that compared to the Petroliev method, the concentrate obtained from normal temperature flotation of fluorite minerals has higher quality and recovery rates, and the slurry does not require concentration, dehydration, or heating, resulting in a simpler process and energy savings.
The flotation temperature was between 15~30℃ for the obtained fluorspar concentrate, which contained 98.35-98.60% CaF2 with a recovery rate of 89.04%. As the temperature increased, the recovery rate also improved slightly. The contents of CaCO3 and MgO in the concentrate were 0.44~0.49% and 0.67~0.69%, respectively, with minimal fluctuations.

A comprehensive closed-circuit test was conducted based on the above conditions. We have compared the processes of returning medium ore sequentially and processing medium ore individually in the closed-circuit flow. The results show that processing medium ore individually is superior to sequential return, as it can prevent the formation of a恶性 cycle in medium ore, ensuring that the coarse separation process is not affected by the return of low-concentration concentrate tailings, thus benefiting the stability of both coarse and fine separation operations. The flotation of fluorite ore with paraffin soap at room temperature can yield a first-class product that meets the national standards, with a high recovery rate and stable quality. Compared to the traditional Petrov method, the process is simpler, energy-saving, and has lower processing costs, making it particularly suitable for local small-scale mining operations. The mechanism by which the lime method effectively separates calcium-containing fluorite minerals from gangue requires further study.