Abstract: A composite wear part may include a ferrous alloy matrix and at least one ceramic reinforcement in the form of an insert having an openwork structure. The openwork structure includes a plurality of blind holes. The blind sides of the holes are positioned on the side of the composite wear part most exposed to wear.

Abstract: The disclosure relates to sintered ceramic grains comprising 3-55 wt. % alumina, 40-95 wt. % zirconia and 1-30 wt. % of one or more other inorganic components. The invention further relates to a method for preparing ceramic grains according to the invention, comprising: making a slurry comprising alumina, zirconia; making droplets of the slurry; introducing the droplets in a liquid gelling-reaction medium wherein the droplets are gellified; drying the gellified deformed droplets.

Abstract: A grinding roller for vertical axis crushers is disclosed herein that is produced by foundry casting of a metal matrix. The roller includes a plurality of reinforcing inserts on its periphery, wherein some portions of the peripheral surface of a same insert are located at a distance d1 or d2 from the work surface depending on wear stresses. Accordingly, the roller has at least one zone experiencing high wear stress Z1, with at least one portion of the insert positioned at a distance d1 near the work surface of said roller; and a zone with low wear stress Z2, with a portion of the insert positioned at a distance d2 that is set back relative to the work surface of the roller. In some examples, distance d1 is less than distance d2.

Abstract: System for monitoring pulp chemistry data of an operating mineral or water processing plant, comprising at least one sample point on a process stream of the operating plant for continuously sampling slurry from the process stream, a sample chamber for receiving the sampled slurry and a feed line between the sample point and the sample chamber to feed the sampled slurry to the sample chamber, wherein the sample chamber is located on the plant site and is arranged for measuring pulp chemistry data of the sampled slurry, further comprising a control system for processing the measured data and providing the measured data to an operator interface element in real-time.

Abstract: In a method for recovering a copper sulfide concentrate by froth flotation from an ore containing an iron sulfide, wet grinding of the ore with grinding media made of high chromium cast iron alloy having a chromium content of from 10 to 35% by weight is combined with an addition of hydrogen peroxide to the conditioned mineral pulp before or during flotation in order to improve concentrate grade and recovery of copper sulfides.

Abstract: A grid plate for the transporting and cooling of very hot materials leaving a furnace is provided. The plate includes cavities of rectangular shape, the largest dimension being perpendicular to the direction of advance of the materials. The cross section of these cavities being triangular with a fin-shaped bottom terminating in a turned-up end of reverse slope, the slope (?) of the cavities being between 10° and 45°, preferably between 20° and 30°, to the horizontal and the reverse slope (?) of the turned-up end making an angle equal to or up to 6° less than the angle of the slope of the cavities. The flow of material under gravity through the air injection slits is interrupted. Any contact of the material with the framework and with the mechanism of the equipment is avoided.

Abstract: A segmented grinding ring for centrifugal vertical roller mills is provided. The segmented grinding ring includes multiple cast segments which may be vaulted together using pin rods and shims to form a continuous ring. The segmented grinding ring enables the manufacture of the segments in a cast composite material.

Abstract: In a method for recovering a copper sulfide concentrate by froth flotation from an ore containing an iron sulfide, wet grinding of the ore with grinding media made of high chromium cast iron alloy having a chromium content of from 10 to 35% by weight is combined with an addition of hydrogen peroxide to the conditioned mineral pulp before or during flotation in order to improve concentrate grade and recovery of copper sulfides.

Abstract: A dynamic air separator for separating materials consisting of particles of different sizes into particle-size fractions. The separator includes a rotary housing and a chamber for recovering the fine particles, which is coaxially arranged in alignment with the rotary housing. The separator also includes a fan wheel positioned coaxially to the chamber for recovering the fine particles. The fan wheel is located at the end of the outlet duct for purified air from the chamber for recovering the fine particles, in order to suck in air during use and send the latter to the air-distribution chamber around the rotary housing.

Abstract: The present invention discloses a hierarchical composite material comprising a ferrous alloy reinforced with titanium carbides according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention relates to a dynamic air separator for separating materials consisting of particles of different sizes into particle-size fractions, said separator including a rotary housing (1) and a chamber (2) for recovering the fine particles, which is coaxially arranged in alignment with the rotary housing, characterized in that: said separator includes a fan wheel (3) positioned coaxially to the chamber for recovering the fine particles; and said fan wheel is located at the end of the outlet duct (4) for purified air from the chamber for recovering the fine particles, in order to suck in said air during use and send the latter to the air-distribution chamber (5) around the rotary housing.

Abstract: The present invention discloses a composite impactor for impact crushers, said impactor comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a composite tooth for working the ground or rocks, said tooth comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a composite milling cone for compression crushers, said milling cone comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas (2) essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a composite milling cone for compression crushers, said milling cone comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas (2) essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a composite tooth for working the ground or rocks, said tooth comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a composite impactor for percussion crushers, said impactor comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The present invention discloses a hieararchical composite material comprising a ferrous alloy reinforced with titanium carbides according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.

Abstract: The invention concerns a cast wear part with its structure reinforced by at least a type metal carbide, and/or metal nitride, and/or boride, and/or metal oxides, and/or intermetallic compounds, referred to below as constituents. The invention is characterized in that the raw materials used as reagents for said constituents have been introduced in a mould (1) before casting in the form of compacted powder inserts or preforms (3) or the form of slurries (4), and the reaction of said powders has been activated in situ by casting a metal, forming a porous conglomerate in situ, and said metal has infiltrated the porous conglomerate, thus forming a reinforced structure leading to inclusion of said constituents in the structure of the metal used for casting, thereby creating a reinforcing structure on the wear part (2).

Abstract: The present invention relates to a dynamic air classifier for the separation of granular and powdery materials into fractions of different grain sizes comprising a rotary cage, wherein: said classifier also comprises a recovery chamber for fine materials with a outlet bottom, said chamber being defined by a casing; said recovery chamber is coaxially arranged in the protrusion of the rotary cage so as to be able to use the vortex created by the rotary cage for cycloning said material; said recovery chamber comprises openings in the casing allowing the passage of the centrifuged material towards ducts for collecting the material located outside the chamber.