Abstract: Discussed in detail geological characteristics, ore types, texture and structure of ores, major chemical composition, iron physical phases, mineral composition and content, major mineral distributing, disseminated grain size of magnetite and dissociation characteristics of Xiaoshalong iron deposit in Qinghai Province. Some contrast tests of multiple mineral processing flowsheet for iron ores were conducted. The research shows that magnetite is fine grained and most microgranular dense or sparse dip in the gangue minerals, and closely embedded with other minerals. The disseminated grain size of magnetite is fine relatively, so the single degrees of magnetite would relatively adequately approach 85％ when grinding fineness that is 0.028 mm accounted for 85%. Two-stage grinding and separation process is more concise, and superior energy consumption and economic indicators.

Key words: Xiaoshalong Iron Ore, Process Mineralogy, Magnetite, Washability