What preparation of the substrate needs to be done after removing a tile and prior to installing the new tile
I think your &quot;slurry mix&quot; is a floor leveler? Is that corect? Your pouring a slurry to level the floor. That would be the correct procedure to prepare a rough surface for tile
After it hardens tile installation can begin. You want to use a thin set adhesive to bond the tile to the surface. Thin set is mixed with water and /or an acrylic admixture (for resiliency) than troweled (notched). Tiles are pressed and set accordingly. Wipe away any squeezed-out thin set with a damp sponge.
When troweling grout into joints do so at a 45 degree angle to the
tile joint. work 3' x 3' areas (or whatever is comfortable). Wait for the grout to stiffen or when you wipe a moistened sponge across the grout joint it stays in place. Rinse frequently and wipe gently.
When you see a haze develop on the tile surface you need to wipe it with a dry rag or cheese cloth. Don't let it sit or it will be a real problem to remove.
That's the short answer on tile installation. It's more difficult than it looks and is best to have someone who's knowledgeable with installing it to be present.