I don’t beleive in purgatory, but I am unclear on what the meaning of fire is some scripture. for example in 1 corinthians 3:10-15

Answer:
I don’t believe in purgatory either, but I do believe hell is a literal place as described in Mark 9:44-46 Where their worm dieth not, and the fire is not quenched. And if thy foot offend thee, cut it off: it is better for thee to enter halt into life, than having two feet to be cast into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched.

In the verse you list, the fire refers to the end of this earth as we know it, and the things which survive that are the spiritual things we do which are eternal. Otherwise, the works we do that will glorify Christ and lead others to eternal salvation…those things will remain forever.