The ROSELECT is an innovative revolving screen (or trommel=drum), which effects a separation based on the dimensions of the incoming material (granulometric) in two or more fractions.
It works as follows:
• the material that has to be screened is introduced into the upper end of the drum;
• the revolving movement of the drum, coupled to its inclination forward, allows to make the materials advance towards the other end of the drum;
• the revolving movement shakes the material, making it hit repeatedly the grids of the drum;
•Larger materials (larger than the holes of the grids) go forward, while the smaller ones fall through the grids;
•in the frame of the drum more than one layer of grids may be fixed, in order to obtain more fractions of materials with different dimensions.
Depending on the application:
•the shape (cylindrical or octagonal)
•the length of the drum
The highlights of the ROSELECT are:
•a high revolving speed (up to 20 revolutions/minute for the model with diameter 3000);
•absence of significant vibrations: this is possible thanks to a careful manufacturing;
•a strong permeability (an average of 75% vacuum);
•easily interchangeable bolted grids on the frame of the drum;
•the possibility of installing the “shovel” in order to accentuate the movement of the material on the grids.