A shredding assembly is disclosed which includes a fixed blade array and a rotatable blade array configured to rotate relative to the fixed blade array about a rotational axis. The rotatable blade array has a plurality of rotatable blades. A rotatable blade includes a main body extending in an outwardly radial direction with respect to the rotational axis, a first cutting face configured for cutting in a first rotational direction of the rotatable blade array, and a second cutting face configured for cutting in a second rotational direction of the rotatable blade array. The plurality of rotatable blades are interspersed with the fixed blade array such that, during rotation of the rotatable blade array, at least a portion of the radial extent of the main body passes through a gap between adjacent fixed blades of the fixed blade array.

A material processing machine for material reducing operations. The material processing machine comprises an infeed system, a reducing system, and a discharge system. The reducing system comprises a rotor having processing tools to reduce the material within a reducing chamber. A colorizer system directs colorant from a colorant source towards the material reducing system within an outlet zone. The colorant colorizes the material being reduced within an inlet zone. The reduced material may be discharged through one or more screens within the outlet zone such that negligible colorant is applied directly to the reduced material. The material reducing operations may comprise a two-stage reducing operation in which the colorizer system is inoperable for the first stage and operable for the second stage. The screens may be selectively interchangeable between stages to incrementally reduce the material to provide substantially uniform colorizing and material size.

A regenerated cutting blade to be mounted and used in a shearing type grinder. The cutting blade includes a fixed part and a blade tip projecting outward from this fixed part, in which the blade tip has a leading edge pointed toward the rotating direction. Side edges 110 on the lateral side outer periphery including the blade tip, the leading end edge and the side edges are regenerated and formed by build-up welding. The lateral sides are provided with slip preventive build-up welding parts 111, 112, 113 extending from the side edges 110 toward the central side of its rotation or the central direction, and the build-up welding parts are formed by three regenerating processes.

This disclosure includes systems and methods that may be used in forest residue processing. Some systems use or include: a filter configured to filter elements based on element size, a separator configured to separate elements based on element areal density, a separator configured to separate elements based on element density, and/or a sorter configured to sort elements based on element wood fiber content.

A shredding device for use in the field of recycling and waste processing has a shredding roller having a basic roller body rotatable about an axis and a feed means for feeding material to the shredding roller, wherein shredding tools are provided on the basic roller body, which are spaced apart from one another and are arranged in rows extending in the longitudinal direction of the basic roller body and extending obliquely with respect to the longitudinal direction. A larger quantity of material is produced at the first end than at the second end of the basic roller body, wherein directly adjacent shredding tools of a row are arranged such that the shredding tool facing the second end is set back in the direction of rotation relative to the shredding tool facing the first end and/or wherein different distances are provided between directly adjacent shredding tools of a row.

A machine for shredding/cutting (200) biomass including a frame (201) in which a tool holder rotor (100) is rotatably mounted on and which a number of tools (103) are arranged. The tools (103) are arranged in conduits (105) which are formed by side walls (104) and are arranged in a conduit (105) in which at least one inclined deflection element (102) is arranged in front of the tool, and wherein additional further deflection elements (202) are arranged opposite the conduits (105) on the frame (201).

A system for shearing bulk material includes a shearing cartridge with an input port and an output port. A first plurality of rotatable blades are disposed about a first shaft. A second plurality of rotatable blades is opposingly offset from the first plurality of rotatable blades.

A compound blade assembly for recycling machines that process random sized waste metals into uniform reusable material. A rotating processing blade and a fixed registerable bed blade each have interchangeable blade teeth sets of multiple blade edge surfaces for interengaging target waste material at multiple shear points by registerable intermeshing in a linear progressive repetitive process.

A cutter assembly is presented for mounting to one or more hammers of a rotor assembly of a grinding machine. The cutter assembly includes a base, a tip mount, at least one cutting edge and a wedge releasably secured to the tip mount, and a fastener securing the base and the tip mount to the hammer. The base includes a truncated pyramid key and the tip mount includes a corresponding truncated pyramid keyway. A wedge edge angle is defined between a wedge top face and side face. A cutting edge angle is defined between a cutting edge knife face and top face. The cutting edge angle can be larger than the wedge edge angle. The cutting edge angle can be in the range of about 30 to about 40 and a wedge edge angle can be in the range of about 40 to about 45.

Described are methods for processing mixed solid waste. The method includes providing a mixed solid waste stream including dry organic material comingled with wet organic and/or inorganic material. The mixed waste is shredded and then separated using size separation and density separation. The shredder has a cut size and rotation speed that produces less than 20% by mass of particles smaller than 2 inches from the mixed solid waste. The shredded mix solid waste is then separated by density and a portion of the stream is recovered as a recyclable or converted to a high value product.