Answer:

speiss

Answer	Crossword Clue
SPEISS	Smelting residue.
SPEISS	Smelting mixture.
SPEISS	Smelting mixture

SPEISS	Smelting product
SPEISS	Smelting residue

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.