Energy-efficient technology for vacuum drying of dispersed raw materials :: SPE RESST

Energy-efficient technology for vacuum drying of dispersed raw materials


Using the relevant example of drying the dispersed rough chromium-oxide refractory materials we tested the methods of determining the moisture and microstructure of dispersed materials subjected to the vacuum drying (Fig.1).

Fig. 1 – Drying chamber

The conditions of thermal vacuum drying were optimized:

	drying from 7…9% to ~0.5% moisture;

	acceleration of drying by a factor of 17 as compared to the drying under atmosphere pressure (Fig2);

	Fig.2 - Comparison of the standard and optimized drying technology

	optimum discrete conditions of vacuum drying are more effective by a factor of 1.7 as compared to the continuous drying (Fig.2);

	after annealing the 100% yield of the high-quality product is provided.

Patented technological process ensures the decrease of the electricity consumption per unit of dried product yield.