Abstract: Provided is a rotary kiln having a cylindrical shell having an inner cylindrical surface and a longitudinal axis and a kiln lining disposed on the inner cylindrical surface of the shell.

Abstract: A lined drum includes a drum having a wall with an inner surface. The lined drum also includes a plurality of liner segments, each liner segment having inner and outer opposing surfaces, opposing side edges, and opposing end edges, the outer surface of the liner segment facing the inner drum surface and the side edges of adjacent liner segments being spaced from each other to define a space therebetween, and at least one retainer having opposing side edges overlapping the side edges of the adjacent liner segments, the at least one retainer attached to the wall of the drum in the space between the side edges of the adjacent liner segments. The lined drum may also include a plurality of bar segments, each bar segment attached to the wall of the drum and at least one retainer.

Abstract: A lifter bar for lifting an engaged portion of a load comprising a number of ore pieces above a disengaged portion of the load in a grinding mill having a shell rotatable about an axis thereof. The lifter bar includes a leading face having one or more leading surfaces, and a trailing face. The lifter bar is mountable on the shell located at a predetermined distance from a trailing face of a preceding lifter bar. When the lifter bar and the preceding lifter bar are mounted on the shell, the leading face and the trailing face of the preceding lifter bar at least partially define a pocket therebetween in which a part of the engaged portion of the load is at least partially retainable, until the leading surface is located in a predetermined release position, at which the part has substantially exited the pocket under the influence of gravity.

Abstract: The invention has as subject matter a rotary tube, especially for a rotary tube kiln for the production of carbon, with several mixing elements arranged in the inner space of the rotary tube for a thorough mixing of a charged material. The rotary tube comprises a transitional area from a smaller inside cross section to a larger inside cross section of the rotary tube. The mixing elements are formed in the transitional area and/or are arranged in such a manner that the charged material is transported during operation by the mixing elements toward the smaller inside cross section. The result is an excellent thorough axial mixing and blending of the charged material, which results in an increased homogeneity of the activated carbon produced.

Abstract: Efficient process control of a rotary breaker is dependent upon the rate at which aggregate material is delivered to the rotary breaker. An improved pre-screening apparatus provides enhanced control of the amount of undersized material allowed to bypass the rotary breaker, thus allows some control of feed rate other than the upstream mining conditions. Further, a variable speed drive mechanism allows for enhanced control of the breaking process occurring within the rotary breaker. These improvements allow for the increase in maximum feed rate to an existing rotary breaker or allows for the installation of smaller and more economical original equipment. In addition, an improved discharge mechanism is provided to increase the discharge rates of a breaker without varying size or speed of rotation. These improvements allow for advanced automated process control.

Abstract: The present invention relates to a rotary tube (1), in particular for a rotary tubular kiln for the production of activated carbon, said rotary tube (1) having a plurality of mixing elements (3), in particular metal turning plates, said mixing elements (3) being arranged in the interior (2) of the rotary tube (1) for circulating and/or mixing the charge material (4). The rotary tube (1) has apertures (5) for receiving securing sections (6) of the mixing elements (3), the securing sections (6) being welded to the outer side of the rotary tube (1). This prevents the welding location being exposed to the aggressive conditions in the interior (2) of the rotary tube (1) in the operating state during production of activated carbon, and it is readily possible for the welding location to be inspected from the outside, and for maintenance and repair to be carried out as necessary.

Abstract: A trefoil for a rotary kiln is provided that has at least three spoke-like refractory legs. Each one of the legs extends radially outwardly from a center of the trefoil; spans approximately from the kiln shell to the center of the kiln; is pre-formed outside of the kiln for installation as a single-leg unit; and has a mating surface that preferably is uniform and even, thereby lacking interlocking features. The mating surfaces of the legs abut one another at the kiln center to provide mutual support. An alignment member, such as a pair of longitudinal angles, are welded to the kiln shell to position the legs. A corresponding method of installing the trefoil is disclosed that includes positioning and shimming the first two legs at the 4 o'clock position and 8 o'clock position, and installing the third leg at the 12 o'clock position.

Abstract: A tumbler for tumbling concrete products comprises a rotatable cylindrical drum having an input end that is slightly elevated relative to an output end. Tire retread strips are placed side-by-side on the radially inner surface of the drum and extend along its length. Clamps having lateral arms extending on either side are engaged with lateral tread grooves on the strips. The clamps are bolted to the drum between adjacent strips thereby securing the strips to the radially inner surface of the drum.

Abstract: A method for grinding of material in a ring roller mill having at least one grinding ring, at least one roller fitted in the grinding ring and at least one unit fitted between the roller and the grinding ring. The method includes the steps of operating the mill at a subcritical speed and at a grinding pressure above 40 MPa, placing the unit in the path where compacted material is released from the ring at a certain distance from a point P, which is the point on the ring where the material is released, in such a way that the unit is hit by agglomerates formed during operation at an angle between 60.degree. and 120.degree., said angle being between the surface of the unit and the direction of incidence of the material, after the latter is released from the grinding ring, and that the loosened material is distributed over the draw-in-zone in front of the roller and over the roller.

Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber, which is defined by an interior wall of a grinding receptacle and an outer wall of a rotor, and an interior grinding chamber, which is defined by an inner wall of the rotor and an outer jacket of an interior stator. The grinding chambers are connected with each other by a deflection chamber. The exterior grinding chamber is equipped with agitator elements, whereas the interior grinding chamber is smooth-walled, free from agitator elements. The cross-sectional surface of the exterior grinding chamber considerably exceeds the cross-sectional surface of the interior grinding chamber.

Abstract: According to the invention there is provided a mill drum comprising a hollow drum structure in use mounted to rotate about a substantially horizontal axis extending longitudinally through the bore of the drum structure. The drum structure including lifter means mounted thereto to extend into the bore of the drum structure. The lifter means in use when the drum structure rotates and material to be ground has been introduced into the drum structure, selectively catch and scoop up larger parts or fragments of the mill contents from the bottom of the drum structure while allowing smaller particles to remain at the said bottom. The lifter members thereafter drop the scooped up parts or fragments at or towards the upper end of the rotating drum structure causing the parts or fragments to fall onto the rest of the contents at the bottom of the drum structure and thus causing a milling action.

Abstract: The invention relates to a tube mill partition as the discharge or transfer wall. With a view to an improved air passage and a simple material flow regulation, in the case of this partition a substantially tubular central part is used, in that a rotary and/or wholly or segmentally axially displaceable adjusting ring regulates the material flow.

Abstract: A dispersing and grinding apparatus comprises a vessel having an inlet at one end for supplying material which is to be ground and dispersed, and an outlet at the other end to discharge the ground and dispersed material. A rotor is rotatably disposed within the vessel and coacts with the inner wall of the vessel to define therebetween a narrow annular flow path through which the material flows from the inlet to the outlet of the vessel. An array of guide members are formed on the inner wall of the vessel or on the outer peripheral surface of the rotor for guiding the flow of the material-grinding medium mixture so that the predominant flow of the mixture in the narrow annular flow path occurs in the circumferential direction. The guide members have forward and rearward guide surfaces for imparting forward and rearward motions to the mixture as it flows circumferentially about the annular flow path.

Abstract: A multipurpose mixer useful for performing horizontal and vertical mixing operations with a single apparatus. Mixing element assemblies are replaceable by removal of a first end of a drum. The mixing operations are performed by rotation of an axially disposed drive shaft located within the drum which accepts the removable mixing element assemblies when the first end is removed. The drum is rotatable through a plurality of angular positions around an axis of rotation orthogonal to the driver shaft. The drum is lockable in any one of a plurality of angular orientations including horizontal and vertical orientations of the drive shaft.

Abstract: A dual sand reclaimer comprising a drum formed of an inner and outer cylinder, substantially along its length, the drum being formed into three segments, an entrance segment wherein the castings are initially deposited for removal of its green mold sand, the inner cylinder thereat being perforated to provide for separation of the sand from its castings, a middle segment wherein the castings and internally arranged mold sand are subjected to abrasive members that remove any core sand, and a third or discharge segment from which the castings exit, and having an inner cylinder thereat perforated to provide for the passage of the core sand and abrasive members therethrough, with the sand being screened for removal thereat, while the abrasive members are returned by vanes arranged intermediate the inner and outer cylinders of the middle segment of the drum for a return to the leading end of the segment for reusage.

Abstract: A lifting element (5) for pipe coolers for material produced at least partially in lumps, e.g. clinker, has a mounting portion (8) fixed to the shell (1) of the pipe cooler, and a carrier portion (9) which extends essentially at right angles thereto and comprises at least one aperture (15; 24,25) passing through it. It may be of fork-like construction, with each aperture (24, 25) located between two tines (21, 22, 23).

Abstract: The invention relates to a method of and apparatus for dry grinding a granular material in a grinding tube mill (1) having a final grinding compartment (2) and one or more preceding grinding compartments (3) containing grinding bodies. The material, after having passed through the preceding compartment or compartments (3), is discharged through openings (6) in the mill (1) and is divided into a fine and a coarse fraction in a separator (9). The coarse fraction is returned to the preceding compartment or compartments (3), and the fine fraction is fed to the final compartment (2). The ground material is discharged by flowing over a dam ring (12) from the final compartment (2). Any grinding bodies carried with the overflow are separated by a sieving diaphragm (13) from the material and returned to the final compartment (2). The invention also relates to the granular material ground according to the method of the invention.

Abstract: A mill liner for a dry autogenous mill includes low profile end liner elements at the ends of the mill incorporating radial ribs with proper height to provide significantly improved mill performance without sacrificing the grinding efficiency. Shell liner elements are also provided with lifter bars as an integral part thereof to simplify maintenance work as well as reduce scrap losses. For the larger size mills, the shell liners are preferably made of a three piece design, a middle section and two identical end sections, thus permitting the middle section which bears most of the wear to be replaced without having to replace the two end sections.

Abstract: A rotating kiln or cooler for use in the manufacture of cementitious materials comprises a tubular body (1) mounted for rotation about the longitudinal axis thereof, a material being fed into the body at one end and removed at the other end. Air or combustion gases flow through the body (1) in the opposite direction to the material.In order to improve the heat transfer between the material and the air or gases, at least one ring (12) of lifting members (34) is provided on the interior periphery of the body (1). The members (34) lift the material and allow it to drop back to the bottom of the kiln, thus increasing the surface area of the material in contact with the air or gases.

Abstract: This invention relates to a lifting wall for incorporation in a tube mill having two support plates divided into segments, intermediately disposed radially adjustable lifting vanes and a central transfer cone.

Abstract: A lifting wall adapted to be incorporated in a rotary tube mill comprises an annular support frame defined by a pair of spaced apart discs between which is secured a plurality of circumferentially spaced, radial lifting blades. The radially outer end of each blade is fixed to the discs, but the radially inner end of each blade is slidable relative to the discs so that the blade can expand and contract according to temperature variations.