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.

A stirring mill, including a horizontally arranged milling vessel and a stirring shaft which is arranged therein so that it can be rotationally driven are provided. The stirring shaft has a first stirring shaft section adjacent to an inlet for material to be ground, which has a smaller diameter D24, and a second stirring shaft section adjacent to an outlet for material to be ground, which has a larger diameter D25 and in which a separating device is formed. Bypass channels leading into the separating device are formed in the first stirring shaft section.

A vertical ball mill for grinding a solid input material to form a slurry, and includes a grinding tank which defines a mixing chamber, rotatable main auger assembly having mixing blade in a lower portion of the mixing chamber and a materials flow guide. The flow conduit is provided within the grinding tank interior, and includes one or more conduit segments configured to direct input material downwardly in the grinding tank towards the lower mixing chamber and auger mixing blade. An impeller is provided within the flow conduit, with a blade configuration selected to effect the downward flow of input material through the conduit segments and outwardly therefrom adjacent to the mixing blade as the auger assembly is rotated.

A drive device for a vertical stirred mill, including a main housing, a motor, and an element able to be rotated by the motor around a vertical axis, the rotary element being fastened to a rotary milling tool of the vertical stirred mill, the rotary element including a substantially horizontal rotary plate, and the main housing including an axial stop able to guide the rotary element axially, the rotary plate being arranged bearing on the axial stop, the axial stop thus being able to react to the axial forces exerted on the milling tool during operation of the vertical stirred mill.

An agitator ball mill comprises agitating discs (18) on an agitating shaft, wherein two adjacent agitating discs (18) are bounding a grinding cell, respectively. The agitating discs (18) comprise grinding material passage openings (28) which are only arranged in the immediate proximity of a grinding chamber inner boundary (19), which connect adjacent grinding cells, and which have a radially outer boundary that has a distance R28 starting from the grinding chamber inner boundary (19) in the radial direction of the agitating disc (18). For the ratio of the distance R28 of the radially outer boundaries of the grinding material passage openings (28) to a radial extension R18 of the agitating discs (18), the following condition applies: 0.05.Math.R18R280.25.Math.R18. Otherwise the agitating discs (18) are closed.

A screw flight system including a helical screw flight, and at least one wear lining element is disclosed. The screw flight system further includes a guiding system including at least one guide pin configured to be arranged on one of the helical screw flight and the at least one wear lining element, and at least one guide hole arranged on the other of the helical screw flight and the at least one wear lining element, wherein the at least one guide hole being configured to receive the at least one guide pin. A vertical grinding mill including the screw flight system, a replacement kit of wear lining elements, and a method for mounting thereof are also disclosed.

The current invention concerns a method for producing an aqueous dispersion suitable for being used as a flame retardant additive to wood composite panels. At least one pH-regulator, at least one inorganic thickener, and optionally at least one smoke suppressing agent is added to a premix while maintaining the actuation of wet-milling systems until the dispersion is obtained.

The media-circulation type pulverizer comprising: an agitating member disposed in a lower region of a pulverization chamber; an annular partition wall disposed to extend upwardly in the pulverization chamber; and a media guide member provided on a lower surface of the end plate of the agitating member, wherein the annular partition wall has a height set to be to of a height of the pulverization chamber, and the media guide member has a lower end which enters a space of the inner region of the pulverization chamber located inside the annular partition wall, and wherein a vertically-extending flow straightening blade is provided between said lower portion of the media guide member and an upper portion of the annular partition wall, and the media separation member is provided on the lower end of the lower portion of the media guide member.

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 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.