For vacuuming dry material I think there will be 3 elements involved: 1. The size of the particles you are wanting to move, 2. The velocity of the air. 3. The volume of air being moved in relation to time.
Once you have the material at the end of the 'lift', you'll need a 'cyclone chamber to centrifugally separate the dry material and allow it to drop to the bottom of the cyclone cone so it doesn't damage the fan.
No idea how to calculate all of this, but the ones I have seen working have massive fan systems. I think the only height limitation is $$$ and practicality. Systems like this used to be are/used to be used in opal mining.
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