Abstract:
This study explores the “coarse−fine classifying, coarse particle for ceramic raw material preparation, and fine particle for filling” technology employing classification and magnetic separation process with the utilization of gold tailings as the primary raw material. The results indicated that the Φ150 mm cyclone effectively classifies the gold mine tailings with a feed concentration of 28.28%, achieving a bottom stream of +325 mesh at 92.83% and an overflow of −325 mesh at 96.09%. Subsequent to the process of initial weak magnetic separation and two stages of strong magnetic separation, a feldspar−quartz output with a whiteness of 59.09%, an iron oxide content of 0.15%, and a productivity of 58.98% can be obtained in the bottom stream material, which effectively achieves the quality improvement, iron removal, and whitening, meeting the light industry standards for ceramic−grade porcelain stone. For overflow material, with an ash−to−sand ratio of 1∶10 and a slurry concentration exceeding 65%, it can meet the requirements for cemented filling and achieve 28−day compressive strength of 1MPa. These outcomes provide valuable insights for enhancing the resource utilization of gold tailings.