Process and apparatus for grinding heterogeneous matrices

Abstract

Process for grinding heterogeneous matrices comprising fragile materials and plastic materials, comprising the steps of: (i) introducing in a mill or similar device a heterogeneous matrix comprising plastic materials and fragile materials of variable dimension; (ii) applying, by suitable moving actuator means, kinetic energy to said heterogeneous matrix, by projecting the materials of the matrix at high speed against suitable fixed stop means provided on said mill; (ill) proceeding to grinding under the effect of impacts occurring between the material projected by the actuator means and the material accumulated on said stop means; (iv) discharging the portion of processed material reduced under a prefixed maximum diameter, characterized in that said stop means are configured so that they can hold removably the material projected against the same in an outer region with respect to the volume interested by the movement of said actuator means.

Description

technical field [0001] The present invention relates to a process for the preparation of ground material with a maximum desired particle size starting from a heterogeneous matrix made of plastic and brittle materials, and a device optimized for carrying out such a process. [0002] In particular, as an example and without limiting the object of the invention, it should be said that the process and the device (object of the invention) can be optimized to extract from heterogeneous matrices made of plastic and brittle materials A ground material with a maximum particle size of less than 3 mm and a weighted average of the obtained particles of less than 1 mm is initially obtained with a higher hourly productivity and reduced specific energy consumption. Background technique [0003] The problem of grinding heterogeneous materials in order to reduce their average size is well known in the prior art. In particular, due to various technical problems associated with grinding, it i...

AI Technical Summary

Problems solved by technology

The specific consumption per ton of material processed is lower than the THOR scenario, but not significantly, especially for substrates with significant plastic material content

Therefore, this solution cannot be successfully applied to municipal waste

Moreover, the described device experiences rapid and significant wear of the grinding elements, so the overall cost of device management is unacceptable in an industrial concept

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