A vertical ball mill includes: a rotor, which is axially and radially supported at an upper end; a stator, which radially extends around the rotor, stands in a self-supporting manner and has a lateral surface that is oriented tangentially to the rotor; and a base plate supporting the weight of the stator. The stator includes least two stator segments, which may be separated from one another, stand unsupported in the separated state and may be moved relative to one another; wherein each of the stator segments has, on at least one side edge of a wall which forms the lateral surface, a sealing surface for sealing to the other stator segment, and has, on the bottom edge, a standing surface for sealing to the base plate; wherein the stator segment standing surface weighs on a load-bearing surface of the base plate.

A liner element for lining a vertical grinding mill agitator including one or more primary mounting portions configured to releasably mount the liner to a shaft of the agitator; and one or more secondary mounting portions configured to releasably mount one or more wear members to the liner. A liner segment including the liner element and at least one wear member is also disclosed.

The invention relates to a rotor for an agitating mill having a generally cylindrical rotor body, the outer wall of which defines an inner surface of a milling chamber, through which a feed material to be treated flows during operation of the agitating mill. A ceramic ring is arranged at the rotor end of the rotor body, the rotor end being arranged opposite the product inlet of the agitating mill. The invention also relates to an agitating mill comprising the rotor according to the invention, to the use of the rotor according to the invention in an agitating mill for producing dispersions, and to a method for producing the rotor.

Disclosed embodiments include a feedstock preparation system that includes a solid feedstock mill including a housing having a chamber. The solid feedstock mill also includes a solids breakup assembly at least partially disposed inside the chamber. The solid feedstock mill further includes a feedstock inlet through the housing into the chamber and a plurality of feedstock outlets through the housing from the chamber.

Disclosed embodiments include a feedstock preparation system that includes a solid feedstock mill including a housing having a chamber. The solid feedstock mill also includes a solids breakup assembly at least partially disposed inside the chamber. The solid feedstock mill further includes a feedstock inlet through the housing into the chamber and a plurality of feedstock outlets through the housing from the chamber.

A stirred ball mill including a grinding container, in which an agitator shaft having grinding elements is arranged, whereby a grinding chamber is formed between the grinding container and the agitator shaft, into which chamber the grinding elements extend and into which at least one inlet duct for grinding material opens and in which a dynamic separation device for grinding bodies is provided, the separation device having recesses for feeding back the grinding bodies, and in which the agitator shaft has at least one recess, which widens the separation device and extends in the axial direction into the grinding chamber for improved distribution of the grinding bodies in the grinding chamber.

A stirred bead grinding mill includes a substantially cylindrical grinding shell and a central stirring shaft within the grinding shell. The central stirring shaft is provided with axially spaced stirring elements, preferably grinding discs, along the central stirring shaft. A replaceable grinding element is provided that includes an axial support structure arranged to form the outer periphery of the grinding element adapted to fit within the grinding shell, and at least one counter disc arranged to project radially inward from the axial support structure to an extent separating two grinding zones in an axial direction while allowing the central stirring shaft within the grinding shell, wherein at least part of the counter disc and/or the support structure is provided with castellations.

A stirred bead grinding mill includes a substantially cylindrical grinding shell and a central stirring shaft within the grinding shell. The central stirring shaft is provided with axially spaced stirring elements, preferably grinding discs, along the central stirring shaft. A replaceable grinding element is provided that includes an axial support structure arranged to form the outer periphery of the grinding element adapted to fit within the grinding shell, and at least one counter disc arranged to project radially inward from the axial support structure to an extent separating two grinding zones in an axial direction while allowing the central stirring shaft within the grinding shell, wherein at least part of the counter disc and/or the support structure is provided with castellations.

A method for producing fatty acid alkyl esters and glycerol implementing a set of transesterification reactions between at least one vegetable or animal oil and at least one aliphatic monoalcohol includes: introducing, into a three-dimensional microball mill at least one vegetable and/or animal oil, at least one aliphatic monoalcohol and at least one heterogenous and/or homogenous catalyst in order to form an initial mixture; grinding the initial mixture at a temperature50 C., in a three-dimensional microball mill, for a residence time5 minutes; recovering, at the outlet of the three-dimensional mill, a final mixture including at least fatty acid alkyl esters, glycerol, the catalyst and the aliphatic monoalcohol that has not reacted; and separating this final mixture of a first phase including the fatty acid alkyl esters and of a second phase including the glycerol, the aliphatic monoalcohol that has not reacted and the catalyst.

Disclosed is a method for manufacturing calcium zincate crystals including: placing calcium hydroxide.sub.2 and zinc oxide, one of the precursors thereof, or one of the water mixtures thereof in a starting suspension, the mass ratio of water to calcium hydroxide and zinc oxide, or one of the precursors or mixtures thereof, being greater than or equal to 1; milling the starting suspension to an ambient temperature less than or equal to 50 C. in a wet-phase three-dimensional micro-ball mill for a residence time less than or equal to 15 minutes and in particular from 5 to 25 seconds; recovering a calcium zincate crystal suspension coming out of the mill; and optionally, concentrating or drying the calcium zincate crystal suspension so as to obtain a calcium zincate crystal powder. Also disclosed are uses associated with the calcium zincate crystals obtained according to the method described above.