As a former research chemist... um... NO.
Hexane is far more difficult to evap off than butane, and the evap process should NEVER be done on a stove under ANY circumstances, the two most obvious reasons being the danger of exploding fumes and the fact that I can GUARANTEE you do not have an extractor hood over yoru stove. Hexane is evaporated in a lab setting in a device called a rapid-vap, which is sealed and under a slight vacuum with an inert gas such as nitrogen being blown across it, GENTLY heated with a heating block meant for heating dangerous solvents, and gently agitated.
Stick with the butane, and stop stealing shit from your school...