Abstract: In order to efficiently recycle the copper resources in a high-speed iron-sulfur concen⁃ trate，the flotation process condition test was carried out based on the analysis of the ore properties of the sulfur concentrate with a sulfur grade of 18.53% and a copper content of 0.724%. The research results show that under the condition of grinding fineness of -0.043 mm accounting for 85%，with lime as inhibitor and C330 as collector，the copper concentrate with a copper grade of 16.90% and a copper recovery rate of 47.32% can be obtained after one roughing and six times of selective open-circuit flotation tests.

Key words: sulfur concentrate, flotation, copper concentrate, orthogonal