This article presents a new cell concept for calciothermic reduction of titanium
dioxide and an ongoing test program for its experimental verification. The
thermochemical background of this concept is focused and a new cell design is
described. This system consists in a single cell, where both the reduction
reaction and the electrolytic reaction for recovery of reducing agent coexist in
the same molten calcium chloride bath. Theoretical electric energy requirement
for this cell is about half of that for the magnesium electrolytic cell in the
Kroll process.