Abstract:
A crushing mill with an internal ring inside an external ring is disclosed. In some embodiments, the inner ring has protrusions that fit within pockets in the outer ring such that as the rings rotate rock or other materials may be crushed between the protrusions and pockets of the inner and outer rings, respectively. In some embodiments, the inner and outer rings each have surface protrusions such that rock or other materials may be crushed between the inner and outer rings as they rotate. In some embodiments, the inner ring has a circumferential ridge that fits within a circumferential groove of the outer ring such that rock or other materials may be crushed between the rings. In some embodiments the rings operate at differential speeds with respect to each other to induce shear forces on the material to be crushed.
Abstract:
The invention relates to a roller mill, particularly an air swept roller mill of the LOESCHE type.The roller mill is preferably provided for the comminution of cement clinker or granulated blast furnace slag and comprises on a grinding track of a rotating grinding pan stationary, rotating grinding rollers and between the grinding rollers stationary, rotatable preparation rollers which compress and remove air from the grinding bed. In order to increase the efficiency of the grinding process and at the same time to reduce the energy requirement the position of the preparation rollers is changed in such a way that the grinding material fed spirally to the grinding rollers is completely rolled over and compressed by the previously arranged preparation rollers. The preparation rollers are, seen in a top view of the grinding pan, positioned radially in the direction of the grinding pan centre and roll with their running surfaces on a smaller running ring than the associated grinding rollers.
Abstract:
A pulverizer monitoring system is applicable to at least one pulverizer having a rotatable bowl assembly, and at least one journal assembly having a grinding roll positioned proximal the rotatable bowl assembly, wherein the grinding roll is deflected by the feedstock raw material forced under the roll during rotation of the rotatable bowl assembly. A position sensor is mounted to the journal assembly to detect an amount of deflection of the grinding roll and generates a position signal, wherein a data module is associated with each pulverizer so as to receive the position signal. A calculation engine is linked to each data module for the purpose of analyzing the position signal and other operational signals associated with the pulverizer and generating at least one characteristic pulverizer condition report. A web-based server is linked to the calculation engine to provide network access to the characteristic report(s), either real-time or historical trends. A user interface is provided with either the calculation engine and the web-based server to allow the custom setting of alarms and/or formats for the output associated with the characteristic report(s).
Abstract:
The invention relates to a tubular mill for grinding natural and synthetic raw materials, in particular for the cement industry, comprising a horizontally-disposed rotary cylindrical drum, characterized by comprising one or more fixed grinding rollers disposed radially within the drum and supported by a fixed shaft which extends along the axis of rotation, each of said rollers being idle and able to rotate by friction within an annular guide rigid with the inner wall of the drum.
Abstract:
There is provided an apparatus and method for comminuting a material. The apparatus may comprise a chamber and an inner surface with a plurality of protrusions, and a hammer positioned within said chamber comprising an outer surface having a plurality of second protrusions configured to engage with the first protrusions. The outer and inner surfaces may be separated by a gap distance which defines a comminution zone. The anvil may be rotated to cause a material to be comminuted as the material passes through the comminution zone.
Abstract:
Disclosed herein is an apparatus for dispersing a nanocomposite material. That apparatus includes an inner chamber in which a metal powder, a nanocomposite material and inner pellets are charged. The inner chamber also includes a plurality of apertures each having a smaller diameter than that of each inner pellet. Furthermore, the apparatus includes an outer chamber that surrounds the inner chamber and includes outer pellets in a space between a wall of the inner chamber and a wall of the outer chamber.