The material to be transported was very heterogeneous, consisting of 60% rubber and plastics, 15% glass, soil and minerals, 10% textiles and wood, 10% paints and oxides, and 5% metals.
This mixture makes it difficult to transport on a conveyor belt because a spillage of material means an environmental problem, so the solution is to design a system of closed screw conveyors that prevent the loss of product. In addition, it also avoids manpower in the route and possible accidents with rollers and drums of a conveyor belt.
The material flow specifications are a capacity of 7 tonnes / hour, with a grain size of 0 to 20 mm, a density of 0.6 tonnes per m3, and a moisture content of 10 to 15%.
To ensure efficient extraction from the hopper that stores the material to be processed and to prevent product accumulation, Sinfimasa designed a double auger in a trough to allow inspection along the entire route and facilitate maintenance. The auger was manufactured in HB400 anti-wear steel and a SEW geared motor was installed with sufficient power but a short rpm ratio to reduce wear and extend the conveyor’s useful life.
For the elevation of the material, a bucket elevator was designed and manufactured with an anti-abrasive belt and stainless-steel buckets with a filling level of 40% above the water level, just like the auger: low filling level and transport at low rpm to avoid product return and wear. Geared motor power ratings were also standardised to save on spare parts costs.
SINFINES Y MAQUINARIA S.A., SINFIMASA, It is a leading Spanish company in the manufacture of machinery for transportation and lifting of all kinds of bulk solid materials by conveyors “endless” (screw conveyors), chain conveyors “redlers” and bucket elevators. Oriented to our customers, we propose concrete and specific solutions according ...