No, that won't work. The clamping load quoted there is for something in contact with the magnet. While it would (just, barely, if everything works optimally) be able to support your mass while it was in contact, the attractive force drops off sharply as soon as the two parts are moved apart. So, it would be able to support it but not levitate it.
Magnetic force drops off with the square of distance but I wouldn't like to predict what happens to that force when you have magnetic bodies disrupting the field. You also need to provide a significant over capacity so that the system has the authority to 'catch' your levitating mass if it drops through the desired position - bearing in mind that as the mass drops the distance to the magnet increases so the effect of the magnetic is reduced.
One way to do this is to choose a magnet and then discover by trial and error how big an iron mass it can levitate at a given distance. With experience I expect you could soon work out how to size the magnet for a given mass and distance, but I don't have that experience.