NOVELTY - Recovery of silica present in the separators located between the elements of lead-aid batteries involves removing lead compounds from plastic material; separating granular plastic from thin plastic (polyvinyl chloride (PVC) and fabrics from polyethylene with silica filler) by drawing them up in a flow of air by using shape effect; pyrolyzing the polyethylene with silica filler; and oxidizing pyrolysis residue to remove carbonaceous residue.    USE - For recovery of silica present in the separators located between the elements of lead-aid batteries (claimed).    ADVANTAGE - The process recovers the quality microporous silica and some types of valuable plastics present in the mixture of heavy plastics materials; and generates a sufficient quantity of energy to make the silica recovery process self-sustaining.    DETAILED DESCRIPTION - Recovery of silica present in the separators located between the elements of lead-aid batteries involves:    (1) washing heavy plastics to remove lead compounds and other foreign bodies;    (2) separating plastics from a washing solution;    (3) recovering lead and regenerating the washing solution;    (4) rinsing of the plastics;    (5) drying of the plastics;    (6) separation of granular plastics from thin plastics (polyethylene with silica filler, polyvinyl chloride (PVC), fabrics) by drawing them up in a flow of air by using shape effect;    (7) separating the PVC and fabrics from the polyethylene with silica filler fragmentation;    (8) pyrolyzing the polyethylene with silica filler;    (9) cracking of the pyrolysis gases and vapors to reduce their molecular weight and render them more suitable for handling and combustion to provide heat necessary for pyrolysis;    (10) oxidizing the pyrolysis residue to remove carbonaceous residues and recover the silica;    (11) pyrolysing the mixture of PVC and fabrics in presence of alkaline substances;    (12) oxidizing the residue from the pyrolysis of PVC and fabrics with production of inert ashes.