No a flame would instantly burn it.
If you don't have an electric burner you can heat up an old pan on the stove then place the bukhoor on it and allow it to burn.
The best and most natural way to burn it is to put the bukhoor on coal.
If you don't have access to coal then the pan method would work:
Or get an electric bukhoor burner:
Who doesn't love out of focus photos from google images...
One piece is enough for 2 full size rooms. Don't break it up.