Best way to remove Mortar from ceramic tile - Tile Advice

[Kimber]

I have ceramic tile that has lifted due to tenting. I want to remove the mortar from the underside so I can reuse the tile.

I have a 10 x 8 feet section to remove clean and recement down. I heard you can soak the tile in water to soften the mortar, but this is not the case.
Chipping away at it is too hard, a Dremel tool gets overheated.

The grout is easy to remove with a hand tool and/or Dremel tool.
Any suggestions? What is the easiest way to remove the mortar?
Thanks for the help

 

[Dave]

A grinder with a diamond cup wheel.

Diamond Concrete Grinding Disc 100 x 22mm

For smaller grinding jobs, this diamond concrete disc from Toolpak is a great choice. The professional-quality grinding disc has a single row of segments, so it’s suitable for lighter duty tasks like grinding or smoothing concrete.The diamond disc will work quickly to remove concrete and masonry...

www.toolstation.com