Crossword Clue:

a mineral residue

Answer	Crossword Clue
CALX	Mineral residue
CALX	Crumbly mineral residue
CALX	Post-combustion mineral residue

ASH	Residue in a fireplace
DOTTLE	Residue in a pipe
ASH	Residue of a sort
SILT	Residue of a flood.
ASH	Residue at a smoker
ASH	Residue for a tray
GUNK	Residue in a bathtub drain
ASH	Residue in a smoker's tray

SLAGS	Forms a residue when smelting ore