Abstract: Ammonium salt roasting process was used in the test of extracting manganese from the comprehensive tailing of Nanjing Lead-Zinc-Silver Mine. The test results indicate that a manganese carbonate concentrate grading 46.02% manganese at a recovery of 86.47% can be obtained under the conditions of ammonium salt-tailing ratio of 0.88, roasting time of 1.5 h and roasting temperature of 450 ℃.

Key words: Lead-zinc-silver ore, Tailing, Roasting, Ammonium salt