Uranium Tetrafluoride

Uranium Tetrafluoride is a temporary material that appears during the uranium treatment process, right after Uranium Solution solidification. This Tetrafluoride may contain either boron or cadmium or hafnium, so another step in the uranium treatment process appears - Uranium Tetrafluoride purification. To start with, you need to dissolve Uranium Tetrafluoride in Nitric Acid (thus, Uranyl Nitrate will appear - UO2(NO3)2) and then smelt it in Environmental Furnace (Environment - HCl), so you will get uranium trioxide (UO3). After it's reduction using Hydrogen (in the cooling cell) you will get uranium dioxide.

The next following process is Uranium Enrichment

Set fluorine as environment and heat furnace up to 430-600°C and then add uranium dioxide (UO2). As a result, you will obtain Uranium Tetrafluoride again, but without boron, cadmium or hafnium. Finally, you can obtain almost pure metallic uranium by adding Calcium or Magnesium. In the picture, you can see in real life Uranyl Nitrate smelting. 2UO2(NO3)2 = 2UO3 + 4NO2↑ + O2↑