Associated minerals In addition to gold, ultrafine vertical mills also contain a variety of heavy minerals, which associated with gold, magnetite, ilmenite, rutile, garnet, zircon, hematite, chromite, olivine, epidote, pyrite, monazite, limonite, platinum, antimony, cinnabar, wolframite, scheelite, cassiterite, corundum, diamond, mercury paste, galena, etc.In the ultrafine vertical mill deposit, heavy minerals usually does not exceed 1-3 kg/m3, and the rest are gravel, pebbles, sand and clay. Clay is not good for the fine-grained gold recovery process and should be removed before the gold selection process.Gold is mostly in the form of granules, flakes and branches in the ultrafine vertical mill deposits, its size generally in the range of 0.2-2mm.Characteristics of ultrafine vertical mill1 Low gold content, generally 0.2-0.3g/m3, and the content of heavy mineral (S>4) is usually 1-3kg/cm3.