- in the half-wet process the wet-prepared raw slurry is dewatered in filter presses and then pressed in paste molds to pellets, which are burnt in rotary kilns. - the half dry process differs from the half-wet process in that the raw mixture is produced by dry grinding and mixing of the starting materials and the homogenized raw powder is granulated to pellets with water on granulating tables.- in the dry process the starting materials are also dry ground and mixed to “raw powder”. During grinding the product is dried with the hot flue gases of the firing kiln to a residual moisture content below 1 %, in which state it is fed into the firing kiln.
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