A laboratory mill is shown and described with at least one oscillatably mounted grinding bowl holder for at least one grinding bowl and with at least one line for transporting a liquid or gaseous medium, the line having at least one compensating element for compensating relative movements between the grinding bowl holder and/or the grinding bowl and a stationary part of the laboratory mill. In accordance with the invention, a rigid compensating element is provided for compensating relative movements, wherein the compensating element is elastically deformed at least in regions during an oscillating movement of the grinding bowl holder and wherein the compensation of relative movements is effected free of parts of the compensating element connected to one another so as to be movable, in particular rotatable and/or pivotable, relative to one another and only by elastic deformation of the compensating element.

Methods and apparatuses for producing spherical metallic powders through continuous ball milling are described. The apparatus comprises a comminution component including an inlet to receive a metallic material at a first region within the comminution component and an outlet to dispense the metallic powder from a second region within the comminution component. The apparatus further comprises a plurality of grinding components to grind the metallic material, the plurality of grinding components being arranged within the comminution component. The apparatus comprises a drive component, connected with the comminution component, to induce movement of the metallic material and the plurality of grinding components within the comminution component such that the metallic material is fragmented through contact with the plurality of grinding components at the first region and an external surface of the fragmented metallic material is altered at the second region to produce the metallic powder.

A method for preparing nanometer MAX phase ceramic powder or slurry having a laminated structure by means of ball milling and regulating the oxygen content of the powder. Micron-sized MAX phase ceramic coarse powder is adopted as a raw material, during ball milling, a gas or a liquid-state gas having a special effect is introduced into a ball milling tank, and by means of multi-dimensional functions and regulation such as ball milling parameters and gas reaction, the nanometer laminated MAX phase ceramic powder or the slurry containing the component is obtained. The surface components and the activated state of the powder are regulated while the particle size adjustment control of the powder is realized.

The invention relates to a device, in particular for a biological sample grinding apparatus, comprising a first enclosure (18) comprising an internal chamber (32) intended to receive a material (57) capable of producing cold by sublimation under normal temperature and pressure conditions and comprising an opening (30) making it possible for a fluidic communication with an internal chamber of a second enclosure (20) through an opening (36) of it, the device further comprising an air circuit making the outside air communicate with the internal chamber (32) of the first enclosure (18), blasting means (76) making it possible for an air circulation in the air circuit from the outside up into the internal chamber (32) of the first enclosure (18).

Methods for reducing moisture content of alkaline earth metal carbonate may include introducing alkaline earth metal carbonate having a moisture content ranging from about 0.1% by mass to about 10% by mass into a primary crusher and operating the primary crusher to obtain alkaline earth metal carbonate particles having a top cut particle size d.sub.90 of 90 microns or less. The method may also include introducing the particles into a primary grinder and operating the primary grinder to obtain reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 60 microns or less. The method may further include introducing the reduced-size particles into a classifier mill and operating the classifier mill to obtain further-reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 12 microns or less, and a moisture content of about 0.15% by mass or less.

A temperature-controlled component and a method for producing a temperature-controlled component, the temperature-controlled component includes a base body including at least one hollow space, through which a temperature control medium can flow. It is provided that in a first region, a first wall thickness is formed between an inner jacket surface of the hollow space and a jacket surface of the base body, and that in a second region, a second wall thickness is formed between an inner jacket surface of the hollow space and a jacket surface of the base body. The second region is a wear region of the component, and the second wall thickness is larger than the first wall thickness in this wear region.

An ink mixture is manufactured by mixing carbon, graphite, and solvents in a mixing system which may include a Cowles disperser. The conductive portions (e.g. carbon, graphite) are evenly and universally dispersed, because an even dispersal means the conductivity of the resulting conductive strip (electrode) will be even, consistent, and reliable. The various embodiments of the ink mixture comprise a blend of different conductive pigments, including but not limited to carbon black and graphite. These embodiments must be grinded until below 6.5 Microns in particle size.

A dimensionally stable ring element (1, 2) for a heat exchanger casing (3) includes: a cylindrical sleeve (10, 20) having a cylinder axis (102, 202), a first end (104, 204) and a second end (106, 206) remote from the first end, and having an inner wall (108, 208), a dividing wall (11, 21) which projects inwards from the inner wall (108, 208) of the sleeve (10, 20) and extends helically around the cylinder axis (102, 202) along the inner wall (108, 208) from the first end (104, 204) of the sleeve (10, 20) to the second end (106, 206) of the sleeve (10, 20). At its first end (104, 204) the sleeve (10, 20) includes a projection (109, 116, 209, 216) extending parallel to the cylinder axis (102, 202), which projection is arranged in a predetermined circumferential position on the sleeve (10, 20).

A three-dimensional grinder includes: a stationary grinding chamber having a generally cylindrical wall along a longitudinal axis XX and delimiting an inner space, the chamber receiving and mixing a starting compound, and generally at least two, in a liquid medium, forming an initial mixture, the stationary grinding chamber being partially filled with a grinding body, which stationary grinding chamber includes, at a first end, an inlet introducing the starting compound and the liquid medium and, at a second end, an outlet discharging an end product formed in the stationary grinding chamber; a stirrer in the stationary grinding chamber, including a rod extending along the longitudinal axis XX, the stirrer being capable of pivoting to move the grinding body/initial mixture mass, the stationary grinding chamber including, in the inner space, a heating device to heat an area of the stationary grinding chamber. The heating device is an introduction heating device.

Methods for preparing and compositions including untreated and surface-treated alkaline earth metal carbonate particulates are described. For example, a method for processing alkaline earth metal carbonate may include introducing alkaline earth metal carbonate into a stirred media mill, and dry grinding the alkaline earth metal carbonate in the stirred media mill to produce an untreated alkaline earth metal carbonate particulate having certain characteristics. In some examples, the method may include introducing carboxylic acid and/or carboxylic acid salt into the stirred media mill, and dry grinding the alkaline earth metal carbonate and the carboxylic acid and/or carboxylic acid salt in an integrated dry grinding and surface-treating process in the stirred media mill to produce a surface-treated alkaline earth metal carbonate particulate. In some examples, heating may be added during the dry grinding process.