The invention concerns a stone processing plant (10) with a machine structure (13),which has one sieve unit (20), the sieve unit (20) having at least two sieve decks (21, 22) arranged in height (H) of the stone processing plant (10), with the sieve decks (21, 22) having a derivative range (A1, A2) respectively, where a transport device (15) is connected to the screening unit (22), the transport device (15) has a loading area (15.1) and a unloading area (15.2), with a means of transport between the unloading area (15.1) and the unloading area (15.2), in particular an endless conveyor belt (15.3),the transport device (15) is fixed to the machinery structure (31) by means of a mechanical adjustment device (13), with the mechanical adjustment device (31) of the control area (15.1) of the transport device (15) between two control positions; where the field of application (15.1) is optionally assigned to one of the discharge areas (A1, A2) of the two sieve decks (21, 22) or to both discharge areas (A1, A2),and where the range of application (15.1) of the transport device (15) is adjustable by means of the mechanical adjustment device (31) between the two positions in the elevation and in the direction of transport (D) of the transport device (15). Such a stone processing plant offers a simple and space-saving design that allows for a conversion to the different operating positions with low effort.
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