Industrial mineral filler unit is used for addition of dust or mineral to the mix material in the mixing zone of the drying and mixing unit. Mineral filler unit is provided with a rotary valve driven by a. C. /d. C. Motor. Mineral filler unit conveys filler material through the drum through a pipe by suitable twin lobe compressor. Industrial mineral filler unit has inlet of mineral adjacent to the bitumen line in the drying drum.
