Abstract: A wear part made in a foundry is provided having a structure reinforced with at least one type of metallic carbide, and/or of metallic nitride, and/or of boride, and/or of metallic oxides, and/or of intermetallic compounds, hereafter called components. The raw materials acting as reagents for the components are put into a mold before casting in the form of inserts or preformed shapes of compacted powders or in the form of barbitones. The reaction of the powders is triggered in situ by the molten metal casting, forming a porous conglomerate in situ. The metal infiltrates the porous conglomerate, thereby making a reinforced structure so as to result in inclusion of the components in the structure of the metal used for the casting, thus creating a reinforcing structure on the wear part.

Abstract: The present invention relates to grinding balls made of fritted ceramic comprising a compound of alumina silicate (?Al2O3.?SiO2) and in particular mullite (3Al2O3.2SiO2), zirconia (ZrO2) and alumina (Al2O3).

Abstract: The invention relates to a composite milling roller, produced by casting, comprising peripheral inserts of a high wear-resistance and high hardness material, sealed in a ductile material on said casting. The roller comprises first zones subject to high wear and second zones subject to low wear, characterised in that said first zone of said roller comprises inserts on the peripheral face thereof with adjoining parts and, in said second zone, a non-adjoining part. The gap between the non-adjoining parts is filled with said ductile material of the cast matrix permitting an adequate mechanical anchoring of the inserts.

Abstract: The present invention relates to grinding balls made of fritted ceramic comprising a compound of alumina silicate (?Al2O3.?SiO2) and in particular mullite (3Al2O3.2SiO2), zirconia (ZrO2) and alumina (Al2O3).

Abstract: The invention concerns a method which consists in establishing, by modeling, an algorithm which defines a relationship between the filling ratio of a ball mill and the angular positions of the bottom and the top of the mill content as well as of its absorbed power, in measuring, in the mill whereof the filling rate is to be determined, the angular positions of the bottom and the top of the content as well as of its absorbed power and in determining, on the basis of the measurements and algorithm, the filling rate of the mill.

Abstract: The invention relates to a composite milling roller, produced by casting, comprising peripheral inserts of a high wear-resistance and high hardness material, sealed in a ductile material on said casting. The roller comprises first zones subject to high wear and second zones subject to low wear, characterised in that said first zone of said roller comprises inserts on the peripheral face thereof with adjoining parts and, in said second zone, a non-adjoining part. The gap between the non-adjoining parts is filled with said ductile material of the cast matrix permitting an adequate mechanical anchoring of the inserts.

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.

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 rotary breaker comprising support grates lined with modular wear parts fitted onto the holes of said support grates so as to reconstruct a wear grate over said support grate.

Abstract: The present invention relates to a wear part made in a foundry, with a structure reinforced with at least one type of metallic carbide, and/or of metallic nitride, and/or of boride, and/or of metallic oxides, and/or of intermetallic compounds, hereafter called components, characterised in that the raw materials acting as reagents for said components have been put into a mould (1) before the casting, in the form of inserts or preformed shapes of compacted powders (3) or in the form of barbitones (4), in that the reaction of said powders has been triggered in situ by the molten metal casting, forming a porous conglomerate in situ, and in that said metal has infiltrated the porous conglomerate, thereby making a reinforced structure, so as to result in an inclusion of said components in the structure of the metal used for the casting, thus creating a reinforcing structure on the wear part (2).

Abstract: The test mill is a reduced-scale model of an industrial mill used in the mining industry and comprising a rotary shell (10) capable of rotating about its longitudinal and horizontal axis. This shell is capable of containing a certain amount of grinding media and of receiving a certain amount of material to be ground so as to be able to operate under conditions comparable with those of an industrial mill. The shell is divided, in the longitudinal direction, by a perforated transverse partition (24), into a grinding chamber (20) and a measurement chamber (22), the perforations in the partition being sized to hold the grinding charge back and allow the ground matter to pass through, whereas the shell (10) comprises a series of injectors (28) allowing fluid products to be injected into the grinding chamber (20). It is possible to make in-situ and continuous analyses of the pulp in the measurement chamber.

Abstract: Throw shoe with one or more pockets, which is intended for centrifugal-type crushers with a vertical shaft provided on its working face of a composite reinforcing structure (6) made of wear-resistant ceramic which has been infiltrated by an iron-based alloy and which is created in situ when the throw shoe is being cast.

Abstract: The mill comprises a cylindrical shell ring (10) revolving about its longitudinal axis and containing a grinding charge comprising grinding bodies made of metal alloy. At least one grinding body (30) identical to those that make up the grinding charge is fixed to an elastomer or rubber pedestal (28), itself fixed to the interior surface of the shell ring. This grinding body (30) is exposed to the conditions inside the mill and is associated with a reference electrode (36) from which it is electrically insulated. This reference electrode (36) is protected from the impact knocks of the charge in the mill but is in electrical contact with the pulp in the mill, the said grinding body (30) and the said electrode (36) being electrically connected to measurement apparatus (18) fixed inside the shell ring of the mill.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces include inserts which have a very high wear resistance, characterized in that the inserts consist of a ceramic pad, this ceramic pad consisting of a homogeneous solid solution of 20 to 80% of Al2O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.

Abstract: The test mill is a reduced-scale model of an industrial mill used in the mining industry and comprising a rotary shell (10) capable of rotating about its longitudinal and horizontal axis. This shell is capable of containing a certain amount of grinding media and of receiving a certain amount of material to be ground so as to be able to operate under conditions comparable with those of an industrial mill. The shell is divided, in the longitudinal direction, by a perforated transverse partition (24), into a grinding chamber (20) and a measurement chamber (22), the perforations in the partition being sized to hold the grinding charge back and allow the ground matter to pass through, whereas the shell (10) comprises a series of injectors (28) allowing fluid products to be injected into the grinding chamber (20). It is possible to make in-situ and continuous analyses of the pulp in the measurement chamber.

Abstract: The mill comprises a cylindrical shell ring (10) revolving about its longitudinal axis and containing a grinding charge comprising grinding bodies made of metal alloy. At least one grinding body (30) identical to those that make up the grinding charge is fixed to an elastomer or rubber pedestal (28), itself fixed to the interior surface of the shell ring. This grinding body (30) is exposed to the conditions inside the mill and is associated with a reference electrode (36) from which it is electrically insulated. This reference electrode (36) is protected from the impact knocks of the charge in the mill but is in electrical contact with the pulp in the mill, the said grinding body (30) and the said electrode (36) being electrically connected to measurement apparatus (18) fixed inside the shell ring of the mill.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces include inserts which have a very high wear resistance, characterized in that the inserts consist of a ceramic pad, this ceramic pad consisting of a homogeneous solid solution of 20 to 80% of A12O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.

Abstract: A plate globally shaped like an upturned caisson with a bearing surface (10) for supporting and driving forward a bulk material layer to be cooled with a cooling gas passing through the platex. The plate front part (10b), viewed in the material forward motion direction, is formed with overlapping flanges (14) sloping upwards and defining transverse cavities (20) in the bearing surface and the overlapping parts of two adjacent flanges (14) defining narrow channels (22) for the cooling gas to pass through.

Abstract: The invention relates to a process for producing cast wearing parts of high-carbon alloy steels having the composition expressed in weight % of: carbon 0.6 to 2% manganese 0.5 to 6% chromium   1 to 6% silicon 0.4 to 1.5% the balance being iron with the usual impurity contents, showing as structure selected from the group consisting of: a non-equilibrium structure of fine pearlite, containing between 1 and 1.5% by weight of carbon with a hardness lying between 47 and 54 RC; a high carbon austenitic structure with a hardness lying between 15 and 30 RC; a high carbon martensitic structure with a hardness lying between 60 and 65 RC, comprising the steps of subjecting steel of the indicated composition, after casting and complete solidification, to a cooling from a temperature of at least 900° C. at a cooling rate lying between 7.5 and 1.0° C./sec down to 500° C. and a cooling rate lying between 2° C.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces includes inserts which have a very high wear resistance, characterized in that the inserts consist of a ceramic pad, this ceramic pad consisting of a homogeneous solid solution of 20 to 80% of Al2O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.