To provide a slurry processing method whereby a coolant can be recovered with a high recovery percentage and an excellent efficiency from a slurry generated when an ingot comprising silicon is cut by a fixed abrasive grain system.

In a slurry processing method according to the present invention, solid-liquid separation of a slurry S, which is generated an ingot comprising silicon is cut by a fixed abrasive grain wire and a coolant, is carried out. A water-soluble cutting liquid is used as a coolant, and the solid-liquid separation of the slurry is carried by a filter press apparatus.