The invention relates to a crusher for crushing solid material, the crusher comprising a frame; at least one crusher rotor arranged rotatably to the frame and having crusher blades secured to the circumference thereof; a yielding counterblade structure arranged for cooperation with the crusher blades of the rotor for concurrently crushing and cutting said material and for yielding when encountering non-crushable material and when overloaded; and a yielding and downwardly openable set of screens below the crusher rotor, whereby the counterblade structure is linked to the frame of the set of screens and made turnable towards it with respect for the pivoting shaft in a yield situation; and the set of screens is linked to the crusher frame on the opposite side of the crusher rotor with respect to the counterblade structure and its pivoting shaft and made downwardly collapsible about the pivoting shaft of the set of screens.

An impact material processing device has a central impact mechanism arranged to rotate about a rotation axis and at least one stator extending circumferentially about the impact mechanism. Each stator has one or more openings through which material impacted by the impact mechanism can pass. A housing extends about the stator and between an upper plate and a base plate. Each stator is located within the housing and can be moved between a first position and a bypass position. In the first position a lower edge of one or more stator is on the base plate and an upper edge extends to at least an inside surface of the upper plate. In the bypass position the stator is moved to where the lower edge of the stator is lifted from the base plate to form a gap through which material entering the device can flow radially beyond the stator.

An impact material processing device has a central impact mechanism arranged to rotate about a rotation axis and at least one stator extending circumferentially about the impact mechanism. Each stator has one or more openings through which material impacted by the impact mechanism can pass. A housing extends about the stator and between an upper plate and a base plate. Each stator is located within the housing and can be moved between a first position and a bypass position. In the first position a lower edge of one or more stator is on the base plate and an upper edge extends to at least an inside surface of the upper plate. In the bypass position the stator is moved to where the lower edge of the stator is lifted from the base plate to form a gap through which material entering the device can flow radially beyond the stator.

An impact processing system (10) having a central opening (12) enabling material flow into a primary impact zone (14) in which is located an impact mechanism (16) rotatable about a rotation axis (18). An impact structure (20) provided with a plurality of holes (22) surrounds the impact mechanism (16). The rotatable impact mechanism (16) impacts material entering the primary impact zone (14) from the central opening (12) and accelerate the impacted material in a radial outward direction toward the impact structure (20) to effect fragmentation of the impacted material so that when sufficiently fragmented the material is able to pass through the holes (22). An optional outer structure (30) is radially spaced from the impact structure (20) and may comprise one or more segments that cumulatively extend about the axis of rotation (18) for an angle from 30 and 270 inclusive. A rotatable set of impact members (50) may be located between the impact structure and the outer structure. One or more gaps (28) may be provided in the impact structure (20) to allow the passage of large and/or hard objects that cannot otherwise be fragmented. The outer structure (30) is positioned to span across the gaps (28) so that material passing there thought is directed onto the outer structure (30).

A multistage hammer mill 10 has a plurality of milling stages arranged concentrically so that substantially all material in a first innermost of the milling stages passes through all subsequent adjacent milling stages. A central feed opening 12 enables material flow into a primary impact zone 14 of a first milling stage, which has an impact mechanism 16 and a first screen arrangement 20a. The impact mechanism 16 rotates about a rotation axis 18. The first screen arrangement 20a is disposed circumferentially about and radially spaced from the impact mechanism 16 and has a plurality of apertures 22 through which impacted material of a first size range can pass. A second milling stage has a second arrangement 20b disposed circumferentially about and radially spaced from the first screen arrangement 20a and a circular array of impact elements 50a between the first and second screen arrangements.

The invention relates to a method for producing recycled scrap, said method comprising the following steps: a) preparing or providing an inhomogeneous, ferrous scrap composition; b) comminuting the inhomogeneous, ferrous scrap composition in a comminution unit in order to obtain a comminuted material; c) separating organic and/or inorganic impurities from the comminuted material in order to obtain a pre-cleaned material; d) analysing the pre-cleaned material with one or more first detection devices in order to detect at least a first item of material information and separating out constituents of the pre-cleaned material in order to obtain a purified material, wherein the separation is performed depending on the first item of material information; and e) analysing the purified material with one or more second detection devices in order to detect at least one second item of material information; f) matching the detected second item of material information with a predefined material criterion associated with the second item of material information, wherein the purified material is output as recycled scrap if the second item of material information fulfils the associated predefined material criterion.

Apparatus and method for recovering precious metals from contaminated cement, comprising, in order of process, a crusher, in which a cement-metal conglomerate is placed, a sieve, a dispenser, a first container, suitable for collecting the metal on the bottom through the action of a magnetic stirrer, an expander, a second container, a drainage tank, and a sieve. The present invention relates in particular to the recovery of precious metal from the batch of cement contaminated by precious metals, such as platinum, rhodium, gold, or silver. In the production of glass fibers for reinforcement, dies made of an alloy of precious metals, in particular platinum and rhodium, are used. These dies are supported by a special cement structure. During the months of production life of the die, part of the precious metal diffuses into the cement on account of the high temperatures. Given the value of the metals, it is economically advantageous to recover them from the supporting cement at each change of the die.

Apparatus and method for recovering precious metals from contaminated cement, comprising, in order of process, a crusher, in which a cement-metal conglomerate is placed, a sieve, a dispenser, a first container, suitable for collecting the metal on the bottom through the action of a magnetic stirrer, an expander, a second container, a drainage tank, and a sieve. The present invention relates in particular to the recovery of precious metal from the batch of cement contaminated by precious metals, such as platinum, rhodium, gold, or silver. In the production of glass fibers for reinforcement, dies made of an alloy of precious metals, in particular platinum and rhodium, are used. These dies are supported by a special cement structure. During the months of production life of the die, part of the precious metal diffuses into the cement on account of the high temperatures. Given the value of the metals, it is economically advantageous to recover them from the supporting cement at each change of the die.

Discretizers that exhibit improved solid additive laden fluid flow emanating from the discretizers and methods of using same, particularly for making fibrous structures are provided.

Discretizers that exhibit improved solid additive laden fluid flow emanating from the discretizers and methods of using same, particularly for making fibrous structures are provided.