  We study the vapour-liquid critical parameters of an ionic fluid confined in
a disordered porous medium by using the theory which combines the collective
variables approach with an extension of the scaled particle theory. The ionic
fluid is described as a two-component charge- and size-asymmetric primitive
model, and a porous medium is modelled as a disordered matrix formed by
hard-spheres obstacles. In the particular case of the fixed valencies $2$:$1$,
the coexistence curves and the corresponding critical parameters are calculated
for different matrix porosities as well as for different diameters of matrix
and fluid particles. The obtained results show that the general trends of the
reduced critical temperature and the reduced critical density with the
microscopic characteristics are similar to the trends obtained in the
monovalent case. At the same time, it is noticed that an ion charge asymmetry
significantly weakens the effect of the matrix presence.
