“…These characteristics can be attributed to the fine particle size of Al-rich sludge, which combined with the presence of soluble salts, leads to poor dispersion, and a trend for suspension structuration when at rest, gives rise to density and humidity gradients in the green cakes and consequently, to differential shrinkages. The possibility for the fine particles to clog the cake or even the porosity of the mold cannot be discarded, which will further deteriorate the slip casting performance [15,16]. With the other suspensions, it was possible to increase the solids loading up to 68 wt.% (C2) or 70 wt.% (C3) by increasing the amounts of deflocculant to 1 wt.% (C2), or to 5-6 wt.% (C3).…”