Abstract:To effectively exploit and utilize the Au-Sb ore in Xinjiang, and formulate a reasonable Separation process, a combination of chemical analysis, optical microscopy, scanning electron microscope-energy dispersive spectrometer (SEM-EDS), and basic principles of process mineralogy analyzer (BPMA) and other methods were used to systematically carry out process mineralogy research on the Au-Sb ore. Including the mineral composition and relative content, the morphology ancparticle size distribution characteristics of the gold minerals, the occurrence characteristics of main metaminerals and gangue minerals, gravity flotation combined process test were carried out on the raw ore. The results show that the valuable metals recovered from the ore are mainly gold and antimony, the concentrations of Au and Sb are 8.16 g/t and 3.14%, respectively. The gold minerals are mainly silver-bearing gold, with only a small amount of native gold.The metal sulfide present is stibnite (4.37%), with minor amounts of pyrite and magnetopyrite (1.29%). The target minerals are silver-bearing gold, native gold and stibnite. At the grinding fineness of -0.074 mm accounting for 80%, gold minerals exist mainly in the form of monomer dissociated gold and fracture gold, accounting for 61.75%, followed by the metal sulfide, a small amount of distribution in other gangue minerals. The gold distribution size is wide, fine particles are only nanometer, coarse particles can reach more than 0.1mm; The particle size distribution of stibnite is uneven, with fine particles only 0.001mm, while coarse-grained massive stibnite aggregates have a particle size of 3mm. At this grinding fineness, the dissociation degree of stibnite is higher, and the monomer portion accounts for 83.72%. Gold minerals are mostly associated with stibnite, and some native gold is immersed in gangue or metal sulfide. Based on the results of process mineralogy studies, by implementing the heavy-float combined process of stage milling and stage selection, we can achieve the production of an ultra-high gold product containing 456.5g/t of Au after mixing. Additionally, this process allows for the production of a high gold and low antimony product with 54.74g/t of Au, as well as a low gold and high antimony product with 46.38% of Sb. The recovery rates for Au and Sb are 95.81% and 97.69%, respectively. The research provides technical reference for the optimization of metallurgical process and production practice of the same type of gold antimony ore.