How to display Icon in excel file from internal table?

Hi guys,

I have a requirement to convert internal table to excel format and send that file via attachment over mail,
To achieve above requirement I need to convert internal table into an binary format.
but in internal table some fields containing the icon values so at the time of concatenate those values to string it is taking icon name not a icon logo.
So is there any way in which I can concatenate that icon symbol with string so that I can able to display it as symbol in excel?