In order to better develop and utilize Meishan iron ore resources，process mineralogy re⁃
search was carried out.The results show that: ①The total distribution rate of iron in magnetite，hematite-li⁃
monite and pseudo-hematite with recovery value in semi-self-fluxing mixed iron ore is 73.97%.Magnetite is
mostly granular，irregular granular，porous irregular shape，particle size disparity，generally in 0.03～0.6
mm. Coarse particles are often wrapped with unequal amounts of fine gangue particles. Magnetite is general⁃
ly oxidized and altered to form pseudo-hematite and hematite. Therefore，magnetite and hematite are closely
related.Part of the pseudo-hematite is produced by close intersection with magnetite，and part of it forms in⁃
dependent ore particles with a particle size of 0.02～0.3 mm. The hematite is mostly irregular granular and
porous，and the particle size is generally 0.015～0.4 mm. Only a small part of hematite appears as a sepa⁃
rate mineral，which is more closely related to the dissemination of gangue minerals than magnetite.②Differ⁃
ent kinds of gangue minerals often constitute gangue aggregates，some of which are embedded in the gaps of
different kinds of iron minerals. Calcite and dolomite have coarse crystal size and are closely embedded with
siderite.Quartz grains are relatively small，some of which are aggregated into aggregates，and the distribu⁃
tion is relatively dispersed，which are embedded in the gap between gangue minerals and iron minerals. The
distribution of silicate minerals such as feldspar and mica is more dispersed，and they are mostly mixed with
fine quartz and are rock debrisembedded in different minerals.③In the sample broken to −2 mm，the magne⁃
tite (hematite) and siderite monomers are less，and the magnetite (hematite) monomer enrichment inter⁃
growth accounts for 68.55%.This creates conditions for pre-enrichment under coarser granularity，which is
conducive to reducing the amount of subsequent grinding and beneficiation，improving the feed grade of sub⁃
sequent grinding and beneficiation，reducing the amount of fine-grained tailings，and achieving good ener⁃
gy saving and emission reduction，cost reduction and efficiency increaseeffect.
