Silos and Hoppers

Kooltron were approached to manufacture and install a 300ton sand silo.

The specification for the 4.5 diameter silo that stands 18m tall was provided by an overseas consultant.


The silo was divided into seven main components; the cone, the roof and five cylindrical sections. These components were individually fabricated then welded together. The cone and the two lower cylindrical sections were fabricated from 10mm plate while the roof and the three upper cylindrical sections were fabricated from 6mm plate.

Once the individual components were fully welded together, steel support bands were welded into place on the external circumference of the silo. The silo was sand blasted and then epoxy coated by a specialist sub-contractor.

The steel support structure was fabricated and built in our workshop in a welded and bolted construction. After fabrication the structure was sand blasted and then epoxy coated by a specialist support sub-contractor. The steel support structure was then erected into place on a specially built and reinforced concrete plinth.

The silo section was lifted onto a flat bed truck and transported the approximate 1km distance to the erection site. Using the special lugs welded onto the silo, the 55ton crane lifted the silo into a vertical position and then lowered into place on the support structure.

The crane held the silo in place while our welders completed the final welds to secure the silo to the support structure, the final welds were sandblasted and then epoxy coated in situ.

The discharge ports located on the cone of the silo and openings in the roof of the silo were critical in that they had to marry up to equipment and components that were fabricated overseas. The exact position and the size of the ports and holes required that the dimensions indicated on the drawing were critically adhered to.

In addition to the silo, we fabricated a hopper that would contain +- 30tons of sand. The hopper measured approximately 2.4m in width, 4m in length and 3m in height. The hopper was fabricated from 6mm plate.

A special support structure for the hopper was manufactured in our workshop.

Once completed, the hopper and the structure were sandblasted and epoxy coated by a specialist sub-contractor. On completion of the painting or epoxy coating, the structure was erected onto the specially re-infornced concrete plinth on site and the hopper bolted into place on the structure.