Abstract: A device for the aerobic treatment, conditioning and/or drying of moist, substantially solid or paste-like, at least partly organic material, has a vessel containing paired, Venetian-blind-like walls, with adjustable blades, forming at least one reaction chamber, at least one air inlet chamber and at least one air discharge chamber, and containing supports which are in spatially staggered array inside the reaction chamber in such a way that they provide the best possible pressure relief for the filling. The invention also relates to a process using said device.

Abstract: In a method and device for drying and conditioning poultry manure or similar pasty materials in the form of particles, selective micro-organisms are, in a microbiological phase, fixed onto stable moulded carrier element, added to the past material to be treated, optimum climatic conditions being generated with air conditioned for the activity of the micro-organisms. Released heat as well as water vapor are evacuated. In the case of a temperature drop, the microbiological phase is substituted by an air stream drying which is terminated when the desired dessication degree is obtained. The device comprises a closed cylindrical tank (1) wherein there is arranged a suspended mounting which may vibrate vertically and which is comprised of two cylindrical coaxial air-tight mantels (14,15) between which are distributed the carrier elements for the selective microorganisms.

Abstract: Apparatus for lining the shell of a tumbling mill and anchoring liner plates by wedge-shaped elements include a lining system including a plurality of spaced liner rings constituted by interfitted liner plates and securing rings each having a wedge-shaped cross-section and being situated between a pair of adjacent liner rings so that each liner ring is retained in position by a pair of securing rings and wherein the securing rings are fixed to the shell of the tumbling mill, such as by bolts or the like.

Abstract: A tumbling mill such as a tube or ball mill, wherein an outer shell is provided with an interior liner made up of a series of rings surrounding and distributed along the axis of the shell and each defining and surrounding an interior hollow milling space which has the cross section of a star with rounded points, in a plane normal to the shell axis, with this space having sharp corners extending inwardly toward the shell axis and alternating with the rounded points.

Abstract: An improved process of forming sintered magnesia bodies from a magnesium hydroxide aqueous slurry wherein the slurry is dried to a moisture content where the solids can be compacted to self-supporting bodies, preferably about 5 to 8% moisture, by heating at a temperature below the dissociation temperature of the magnesium hydroxide, compacting the dried magnesium hydroxide into briquettes, heating the briquettes at a temperature above the dissociation temperature of magnesium hydroxide to form magnesia, re-compacting to form new briquettes of greater density, and heating to sintering temperature to sinter the briquettes.