Dear benjaminsaeedi,

Although a pressure pneumatic conveying system is a technological option, the energy consumption would be very high, and Alumina powder is not the easiest material to convey pneumatically, certainly over long distances.

A quick preliminary design calculation can give an indication of the size of the installation and the problems to overcome.

A belt conveyor is probably the best option. In that case, the belt slope cannot be higher than approx. 5 to 8 degrees.

In the Alumina industry many long conveyors are used.

By truck is also an option.

That solution requires a number of trucks.

Pneumatic bulk tankers with dedicated compressors special for alumina designed.

Ordinary bulk cars require a closed cover and a dump pit with subsequent transport to the selected storage facility.

The required transport rate is the key parameter in this project.

If the transport rate is low (f.i. 50 tons/day, a bulk truck (pneumatic or not pneumatic) is probably the optimum solution. The project becomes a logistic project)

Above a transport rate of approx. 500 tons/hr. or higher, a belt conveyor is definitely the optimum solution.

Between the 50 tons/day and the 500 tons/hr. an extensive project study, including preliminary design, must be made.

The main parameter is the annual throughput of Alumina and the resulting required conveying capacity. (Which you did not mention)

Such a project requires a general preliminary design effort to verify the selection criteria.

And you did not mention how the complete conveying system looks like. Is it from a ship unloader to a silo or from a silo to another silo?

Your question is too simple for a clear and substantiated answer.

Simple questions go seldom together with simple answers. ■