манганы хүдэр олборлох журам ironoredressingplant. equipment of size the sand by filter. The homogeneous sand filter has a 0 9–1 m deep bed and typically of 0 85–1 7 mm of sand effective size 0 9 mm placed on a 50 mm layer of 4–8 mm or 75 mm of 6 7–13 2 mm gravel Homogeneous sand of effective size up to 1 3 mm ...