How can you separate copper filings and sulfur by the evaporation method?

Copper sawdust and sulfur can be separated by the evaporation method as follows: first you need to fill this mixture with water, then you can see that the sulfur will float to the surface of the water, and copper sawdust will settle to the bottom. You can also heat this mixture in an aqueous solution, all the same, sulfur will be on the surface of the water, and sawdust at the bottom.