Traditional method used for tire processing provides for stage grinding of tires and sorting of the ground mass. In the newly-developed method, tire grinding process goes in 3 stages, with the sorting out of the ground mass after the 2^nd and 3^rd grinding stages. Metal cord is separated after each grinding stage, while textile cord is separated at the sorting out stages. Unsorted particles of the ground mass are returned for regrinding.

Traditional installation for tire processing comprises units for rough and fine grinding made as a roll crusher with tooth discs and receiving (intake) hoppers; a system used to take and send large-sized fractions which is made as a horizontal container and an inclined container; an inclined external conveyor to discharge small-sized fractions, with the conveyor lower end located under the fine-grinding roll crusher; a metal separator; and a control panel. The newly-designed installation for tire processing is equipped with a primary sorting unit which is installed downflow the fine roll crusher, a powdering unit located downflow the primary sorting unit, and a secondary sorting unit installed downflow the powdering unit. Each sorting unit is provided with a device to return unsorted particles of the ground mass for regrinding. The powdering device is designed as a roll crusher with tooth discs and receiving (intake) hoppers. The primary sorting unit includes a sorting device above which an intake part of the conveyor used for small-sized fraction transportation is positioned. The conveyor unloading part is located above the intake hopper of the powdering roll crusher. The primary sorting unit also includes an intake part of the conveyor used for textile cord transportation whose unloading part is located above the textile cord hopper. The secondary sorting unit comprises a sorting device, a conveyor for powder transportation whose intake part is located under the powdering roll crusher and whose unloading part is located above the sorting device, a conveyor for textile cord removal whose intake part is located under the sorting device and whose unloading part is located above the textile cord hopper, and additional metal separator installed in the section where the powder from the sorting device enters the hopper.

Four modifications of the new installation are available.

1. In the first modification of the installation, a device for returning ground particles on regrinding installed in the secondary sorting unit is designed as an inclined chute fixed at the unloading part of the sorting device. The chute lower part is located above the inclined conveyor of the large-sized fraction receiving-sending system.

2. In the second modification of the installation, a device for returning ground particles on regrinding installed in the secondary sorting unit is designed as a conveyor whose intake part is located under the sorting device and whose unloading part is located over the intake hopper of the fine-grinding roll crusher.

3. In the third modification of the installation, the inclined conveyor of the large-sized fraction receiving-sending system is installed in front of the horizontal conveyor in a way that its lower end is located under rough-grinding roll crusher and its upper end is located above the intake part of the horizontal conveyor whose unloading part is located over the intake hopper the fine roll crusher.

4. In the fourth modification of the installation, a metal separator is designed as a horizontal conveyor with a magnet plate and is placed above the horizontal conveyor of the large-sized fraction receiving-sending system and the inclined conveyor for removal small-sized fractions. The metal separator longitudinal axis is perpendicular to the axes of these conveyors. A metal cord hopper may be placed under the unloading part of the conveyor equipped with a magnet plate.

Smerdov V.V., etc.

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