Subject: can salt be melted at a high temp. the way sand is melted to make glass.

I,m doing an experiment using plain house hold crystals such as alum, 
sugar, baking soda and salt.  The salt would not melt the way the sugar 
and alum melted. So I would like to know if it is possible to melt salt 
and why the salt wouldn't melt. I assume its because it is an ionic 
crystal and needs a higher temperature. I need to know if this is true.

Re: can salt be melted at a high temp. the way sand is melted to make glass.