摘要 |
Method of recycling tyres or other discarded rubber products, so as of conveyor belts, where the tyres supplied are sorted and checked, then the tyres are separated into beads (5) with the wire beads, sidewalls (4) and tread (3) by water jet in the first stage, the separated sidewalls (4) and tread (3) are separately conveyed to the second stage of cutting by water jet to pieces of uniform size, the cut pieces are frozen, then crushed to a mixture of structure with fully separated individual fractions, the mixture is left to settle down and is then sorted to individual fractions, i.e. textile lint, metal, rubber granulate, and eventually, the finest textile fluff is removed from the final granulate. Equipment for recycling comprises a device for controlling of liquid nitrogen level height in the freezing chamber, which freezing chamber is formed by a controlling chamber interconnected with the freezing chamber on the principle of interconnected vessels, where the controlling chamber is provided with liquid nitrogen level height sensors, which sensors are connected to an electromagnetic valve of a liquid nitrogen storage tank for opening/closing input of nitrogen into the controlling chamber. Crushing knife for crushing of material in a chamber comprising a longitudinal slat, which slat is provided with a through hole on one end, which hole is used to mount the slat in a rotor and in a cross-section along a plane perpendicular to the axis of the through hole the leading edge (2) of the knife (1) has a convex or concave form, which convex or concave form of the leading edge (2) is formed by a part of logarithmic spiral or Archimedes' spiral or by a part of a circle evolvent. |