How do you separate sodium chloride, ammonium chloride, and sand?

Ammonium chloride, sodium chloride, and sand can be separated from each other by using the following steps:
1) Sublimation for separation of ammonium chloride:
Ammonium chloride undergoes sublimation at a temperature of about 337.6 degrees Celsius and forms ammonia gas and hydrogen chloride gas. We can heat the mixture at this temperature and collect the gases that are produced to separate ammonium chloride from the mixture.
2) Water dissolution, filtration, and evaporation:
Sodium chloride is easily soluble in water, while sand does not dissolve in water. To separate out sodium chloride from sand, one can dissolve the mixture of sodium chloride and sand (left over after step 1 for ammonium chloride separation) in water. Heating and stirring will speed up the process of sodium chloride dissolution in water. The sand will settle down at the bottom of the container and can be filtered out from the liquid phase, using a filter paper, piece of cloth, etc. Finally, the sodium chloride can be obtained by evaporating the water from the liquid phase (water containing sodium chloride in it) by boiling it at 100 degrees Celsius. 
Hope this helps.