Abstract: A gold ore in Yunnan carbon-based content is high, gold mineral is mainly natural gold, aggregation degree of partial gold and sulfide minerals are high, most of particle size are fine, after enrichment then cyanide leaching technology is suitable to extracting gold.Test research indicated, suitable purifying technology was grinding product which -200 mesh account for 85% table concentrator gravity separation, tailings concentrator one time roughing twice regrade twice scavenging, middling order return process flotation, heavy minerals with gold grade 295.45 g/t,recovery rate 32.65% and flotation gold concentrate with gold grade 42.07 g/t,recovery rate 53.46% could obtained, general recovery rate of gold reached to 86.11%.

Key words: Gold ore, Carbon-based, Gravity separation-flotation technology