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Upgrade of radial tires, bearing system of agglomeration drum


Deadline 16/09/2020

Closing Time

Antofagasta Minerals has requested Expande to scout for suppliers in the local and international ecosystem that can provide solutions for the challenge “Upgrade of radial tires, bearing system of agglomeration drum”.


Currently, the agglomeration equipment has a transmission system consisting of 8 driving radial tires powered by a geared motor and 8 guided radial tires. The set of tires through direct drive makes the drum rotate and the glomer is generated. The system is working at its maximum installed capacity, with the set of radial tires being the most vulnerable to any increase in load or disturbance. These demands at maximum capacity cause tire failures such as: loss of pressure, air leakage from seal and the rotation of the tire with respect to the rim, losing the visibility of the air intake valves. The challenge is to find technological alternatives to increase the permissible load capacity of radial tires.


A search for technologies that allow an increase in the permissible load capacity of radial tires without modifying their current dimensions and considering alternatives with or without pressurization of the tire.


• Dec-2004: A structural analysis of the agglomeration cylinder is carried out through the development of finite elements since it presented cracks and fissures in the ferrule surface. This report shows maximum stress loads on radial tires.

• Dec-2019: An improvement is made to the inner lining of the agglomeration drum. Drum useful life is increased from 3 to 8 months. The modification implies an increase in the total weight of the agglomeration drum from 22.7 tonnes to 30 tonnes.

• Mar-2020: Radial tires that have a higher bearing capacity are sought. It is not possible to obtain positive results because its dimensions must be increased in order to increase the stress loads.


• Reduction of unexpected shutdowns due to pressure loss or collapse of a radial tire.

• Plant yield increase. • Reduce the frequency of tire changes, optimizing their useful life.

• Reduction of FTE (Full-Time Equivalent) due to the increase in the frequency of changes.