Figure out the radius for the stone block. This radius depends on the size of the sugar kettle and stacking blocks. Mark radius.
Dig a 6" footing for the stone and fill half way with base rock. Make sure the rock is level. Add a 1" layer of sand for blocks to maneuver level onto.
Set first course of blocks along radius mark. Butt the ends of the stone up and make sure that each stone sits level. Use a rubber mallet to pound each block in place. Once the first course is set, begin setting next course. Stagger the blocks along the seams of the first course, like a brick wall. This creates a stronger fire wall. Adhere the blocks with cement epoxy and make sure they sit level. Continue to stack blocks to desired height.