System and method for the gravimetric sorting of a mixture of substances

A system for the gravimetric sorting of a mixture of substances during the processing and/or the recycling of residual building materials and/or demolition materials, comprising:

• a fractioning unit adapted to divide the mixture of substances into at least m, m≥2, fractions, wherein each fraction comprises particles of a predetermined size distribution;
• at least n·m gravimetric densimetric tables arranged in m cascades each with at least n, n≥2, gravimetric densimetric tables distributed to n stages such that each stage comprises per cascade at least one gravimetric densimetric table,
• wherein the fractioning unit is coupled to the m gravimetric densimetric tables of the first stage such that a different one of the at least m fractions can be supplied to each of the gravimetric densimetric tables of the first stage;
• wherein each gravimetric densimetric table comprises a work floor inclined at an angle to the vertical of the gravimetric densimetric table and adapted to be flown through with air and vibrate to separate particles supplied to the gravimetric densimetric table into an assigned first partial fraction of particles having a density which is smaller than a separating density assigned thereto which flow, with respect to the vertical, to a lower end of the work floor, and into an assigned second partial fraction of particles having a density which is larger than the separating density assigned thereto which flow, with respect to the vertical, to an upper end of the work floor;
• wherein, within each cascade, each gravimetric densimetric table of a considered stage is coupled to a gravimetric densimetric table of the preceding stage such that either the first partial fraction or the second partial fraction of the gravimetric densimetric table of the preceding stage can be supplied to the gravimetric densimetric table of the considered stage, and the assigned separating density of the gravimetric densimetric table of the considered stage is chosen to be smaller than the assigned separating density of the gravimetric densimetric table of the preceding stage when the first partial fraction is supplied, the assigned separating density of the gravimetric densimetric table of the considered stage is chosen to be larger than the assigned separating density of the gravimetric densimetric table of the preceding stage when the second partial fraction is supplied;
• wherein n+1 final products are separated within each cascade.