Zenith mine machinery Company in China has more than 30 years professional experience at ultrafine vertical mill, design complete set process flowchart, provide full set coltan ore processing machines, and send engineer to mine site for equipment installation and commissioning guidance.Below are the flowchart description that Zenith Engineer recommend for the ultrafine vertical mill process flowchart Feeding-washing-sieving-primary separation - final concentration- upgrading Feeding:there has various kinds feeding way, depends on plant and material conditions.If there has big stone, can make grizzly bar on feeding machine or hopper to remove big waste stones.Washing:firstly need to wash clean the clay and mud in raw material, most popular used are ultrafine vertical mill, coltan washing trommel screen or log washer. Coltan washing trommel scrubber is for washing material that with much sticky clay, trommel screen is for wash raw material that without much sticky clay.