关键词: 赤铁矿, 正浮选, 组合捕收剂, 捕收性能

Abstract: Donganshan iron ore is a typical poor hematite which is relatively difficult to be processed in China, breakthrough has not obtained under room temperature flotation for several decades. In the research process of handle donganshan hematite by using new type and efficient combined collectors TL5 in laboratory, research of grinding product fineness, dosage of combined collectors TL5,dosage of sodium carbonate, pulp temperature during flotation and flotation mechanism and so on were finished. Compare with sodium oleate, the new type collector, flotation temperature reduce from above 30℃ to around 26℃,grade and recovery rate of one roughing refined iron mine are raise from 39.97% and 90% to 40.47%和92.50% separately, is an important break on flotation reagent research of lean hematite ore in Donganshan. Plant selection  energy consumption could be lowered, greenhouse gas emission could be reduced by using this new type combined collectors, coincidence with the request of low carbon economic model.

Key words: Hematite, Direct flotation, Combined collectors, Collecting performance