With a magnet : only iron will be attracted.
You use a magnet because iron fillings are magnetic.
magnetic separation-the iron fillings are small and can be magnetize so, by using magnets you can able to separate sand from iron fillings
filtration
fractional distillation
To separate out the iron fillings, run a magnet over the mixture of iron fillings, sand and water. As iron is a magnetic material, it will stick to the magnet thus allowing you to take it out. Then, run the mixture over a filter funnel with filter paper. After the filtration, the filtrate would be water and the sand would be stuck on the filter paper.
iron fillings and sand
Use a magnet. The magnet will remove the iron filings form the sand.
Use a magnet to remove the iron, then pour what is left into water. The sugar should dissolve. pour the solution through a sieve to remove the sand and gravel. A fine sieve can be used to separate the gravel and sand.
you can easily remove iron with magnet. then if you do not care about the sulfur you can set it on fire, and what is left will be pure sand. If you do care about sulfur i don't think i can help you.
It is not a chemical change. The iron and sand can be separated out.
You can pull the iron out with a magnet. Heat the mixture, taking appropriate safety precautions, and the naphthalene will sublime off and can be collected on a cold surface. Add the remainder to water, the salt will dissolve and the sand won't. Filter to collect the sand, and crystallize the salt from the filtrate.
maybe it will melt