Advanced Dry Recovery (ADR) is a new technology for separating materials. It performs purely mechanically and in the moist state, i.e. without prior drying or wet screening. This choice reduces process complexity and avoids problems with dust or sludge. ADR is applied to remove the fines and light contaminants with an adjustable cut-point of between 1 and 4 mm for mineral particles. It uses kinetic energy to break the bonds that are formed by moisture and fine particles and can classify materials almost independent of their moisture content. After breaking up the material into a jet, the fine particles are separated from the coarse particles. ADR separation has the effect that the aggregate is concentrated into a coarse aggregate product and a fine fraction which includes the cement paste and contaminants such as wood, plastics and foams.
Within HISER, field experiments are being performed by means of a novel mobile pilot plant containing different unit operations such as: attrition milling, screening (>16mm), and mobile ADR insulation beside integration of the sensors and quality control elements. Both the up-scaling of the ADR technology and the
Schematic of the ADR principle
process design for the integration of all unit operations in the plant (requiring basic design, detailed engineering and built engineering) were carried out to build the mobile pilot plant.