<p>This study investigates the flotation foam performance of gold-bearing pyrite using different combinations of collectors and frothers. Four collectors (butyl xanthate, ammonium dibutyl dithiophosphate, Z200, and MA-1) and four frothers (2# oil, kerosene, pine oil, and HX-609) were evaluated through flotation tests, foam stability analysis, surface tension measurements, and viscosity tests. The results show that a pulp pH of approximately 7 is optimal for the flotation of gold-bearing pyrite. Among all reagent systems tested, the MA-1/HX-609 combination exhibited superior performance in both recovery and foam stability. Although HX-609 produced relatively lower foam height, it showed the longest foam half-life among all frothers tested. Surface tension and viscosity results indicate that MA-1/HX-609 provides the strongest surface tension reduction capacity and higher pulp viscosity, leading to improved foam stability. Given that MA-1 is a long-chain xanthate, it enhances the hydrophobicity of gold-bearing pyrite more effectively than short-chain xanthates. In summary, MA-1/HX-609 is identified as the most effective and suitable flotation reagent system for gold-bearing pyrite.</p>