Umm no it was flame of blue color that burned a Zombie to a crisp. Much hotter than Sanji's psuedo flames that didn't even leave second degree burns on Queen, Zoro's move was like amaterasu so hot, it only stops when you are burned to crisp..
Zoro never used it again because Zoro doesn't need it, it is beneath him. Why burn things that you can cut in half.
Sanji's blue flames ain't ever doing this
Or this
Why use inferior ability when he has superior abilities like you know
-Advanced Armament Haki
-Power of very very strongest Advanced Conqueror's Haki
Blue flames is pre time skip zoro level power