Sinfimasa designs and manufactures tailor-made elevators, such as this case: a robust and wear-resistant elavator for temperatures up to 500ºC.
Elevator for foundry sand
Sinfimasa designs and manufactures tailor-made elevators. Each elevator is individually adapted to the specific project. We want to share publicly how we solve the problems posed by the market.
Our customer is an important foundry that needed to recover the sand used in its manufacturing process in order to reuse it for the filling of its moulds.
Wear and temperature resistant
The difficulties in this project are that this type of sand is very abrasive and that the working temperature at the inlet of the elevator is 200ºC with peaks of up to 500ºC. Therefore, we designed a chain bucket elevator. We used a round steel chain, as the high abrasiveness of the sand would cause unacceptable wear on the bushings.
The chain alloy contains a high percentage of manganese, which makes it wear resistant. The buckets are also reinforced with anti-wear steel.
The coating used for both primer and finish is anti-caloric, a coating based on silicone resins with aluminum pigments for high temperature resistance. The construction is industrially robust in terms of body, head and foot thicknesses. The elevator is self-tensioned by means of a system of counterweights, to assimilate the expansions produced by temperature changes, and has a stop that prevents the lower pulley from touching the bottom of its travel.
As drive a 4.4 SEW direct-acting geared motor was chosen to provide a capacity of 20 metric tonnes per hour. As bearings, both at the head and at the foot, SKF-SNH 22000 roller bearings were installed.