Abstract: In a screening device for sorting granular material with at least one rotatable rod basket and a downstream fine material separator a cyclone-type eddy separator is attached with the smaller diameter of its housing cone in order to draw off the screening gas flow charged with fine material and flowing out due to twisting energy in such a way that the rod basket screening device and the separator form a compact unit. A submerged pipe is located in the center of the cyclone-type eddy separator for drawing off the screening gas flow freed of fine material. At least one opening is provided for discharging the fine material at the periphery of the eddy separator housing.

Abstract: A closed-circuit grinding plant for grinding coarse material into a fine material, in particular for generating cement raw meal and/or cement from cement clinker, the plant having at least two roller presses disposed about a central riser shaft which pneumatically transports the fine material or pulverizing the coarse material, at least two sifters for separating the fine material generated during the pulverization from still existing coarse material, and at least two fine material settling devices for settling the fine material from the sifting air of the sifters.

Abstract: A recirculating grinding mill, including at least two rolling presses for comminuting the material to be ground, at least two first classifiers for classifying a coarse-grain fraction, at least one second classifier for classifying a fine-grain fraction and a medium-grain fraction from the fractions classified in the at least two first classifiers. The feedstock is fed into the recirculating grinding mill passing the at least two rolling presses and the at least two first classifiers and then the at least one second classifier and the medium-grain fraction and the coarse fraction of the at least two first classifiers being fed once again to the rolling presses, and the at least two first classifiers being arranged underneath the at least two rolling presses. The rolling presses are placed between at least two risers for transporting the circulating material being ground.

Abstract: A feed device for a high-pressure roller press for the high-pressure comminution of material to be ground, the feed device feeding the material to be ground in a controlled manner into the roller nip between two rollers of the high-pressure roller press. The feed device has at least two rotary valves, the position of which is variable independently of each other. In a refinement of the invention, the feed device also has a shaft which is variable in height above the roller nip. By means of the rotary valves which are variable independently of each other and by means of the height-variable shaft, the feeding behavior of the feed device can be varied during the starting of the high-pressure roller press and during the operation of the high-pressure roller press in order thereby to prevent the high-pressure roller press from vibrating and to ensure optimum operation of the high-pressure roller press.

Abstract: The invention relates to a roller press comprising at least two rotatably mounted, counter-rotating rollers, separated by a roller nip, wherein at least one roller is driven by a gear. According to the invention, a coupling is situated between the gear and the driven roller or rollers. The advantage of the invention is that it provides a connection between the drive and the milling roller which permits simple, rapid disassembly and assembly of the connection between the shaft and the drive.

Abstract: A method for the production of an annular casing for the press rollers of roller presses for the pressure comminution of particulate material, the outer surface of which casing always has a high degree of hardness and consequently a high wear-resisting capability, but the radially inner region of which casing has a lower degree of hardness to avoid casing ruptures. The annular casing is cast of nodular cast iron with at least the alloying elements Ni and Mo. The cast body is given a bainitic structure with residual austenite by a subsequent heat treatment followed by controlled cooling. The outer surface is constantly re-hardened during use via pressure loading such that martensite is constantly formed in boundary layers of the outer surface.

Abstract: Raw meal sludge is dried in a vapor flow dryer by circulating exhaust vapor through a steam circuit which, prior to introduction thereof into the lower part of the dryer, is heated by indirect heat transmission from gaseous flows from a pre-heating system from a gas cyclone of a clinker production line. A partial vapor flow corresponding to water evaporated during raw meal sludge drying is removed from the steam circuit and extracted in the form of a condensate after increasing the vapor temperature by a vapor compressor and the passage of vapor arranged in the dryer over a heating surface of a vapor condenser. The sludge is sprayed into the lower part of the dryer where water is evaporated by the heat of the circulating exhaust vapor and heat from the condenser heating surface. Dried raw meal is separated from the exhaust vapor in a cyclone separator.

Abstract: A tandem roller press has two roll pairs which are arranged next to one another in an axially parallel manner in order to provide a roller press system, in particular for the material bed comminution of granular material, which can considerably exceed previous limits with regard to throughput performance but also with regard to the specific energy requirement. Preferably, common feeding of the granular material and common discharge of the material which has been subjected to the material bed comminution are arranged. A tandem separator device may be arranged below the two roll pairs in order to form two parallel compact milling circuits with a high throughput performance overall.

Abstract: In order to provide, for a grate cooler for cooling hot bulk material, such as, for example, cement clinker, an, in particular, automatically operating cooling air regulator which has a simple construction and can be used without difficulty both for unmoved and, in particular, for moved cooling grate regions or moved cooling grate systems, for example, cylindrical hose sleeve comprised of elastic material be tension-mounted as an actuating member coaxially in the regulator housing which is arranged below the cooling grate, participates in the movements of the latter and has a casing comprised of solid material, the pressure difference inside and outside the hose sleeve and the deformation resistance of the sleeve being set such that the hose sleeve is deformable, in particular, automatically from its maximum flow cross section into its minimum flow cross section and at the same time regulates the volume flow of the cooling air flow from below into the cooling grate.

Abstract: A roll press for the compression or compacting of granular products. Two detachable rolls separated by a roll gap are driven in opposite directions and mounted on shafts to rotate in a machine frame. The shafts of the mobile rolls are received in bearing housings arranged in a mobile manner in the machine frame. Two respective bearing housings of different rolls, arranged on one side of the rolls, are interconnected by at least one pressure cylinder having at least two working chambers. A method for centering mobile rolls in such a roll press. The at least two working chambers have a force effect acting in opposite directions, and are interconnected in such a way that a pressure medium can circulate between the chambers. In this way, the hydraulic system is positioned in a fixed manner on the machine frame, the rolls nonetheless being mounted in the machine frame in a floating manner.

Abstract: A two-roll machine has two rolls rotatably mounted in bearing housings, driven in opposite directions and separated from each other by a roll gap. One roll is a loose roll with bearing housings horizontally supported on machine frame side parts by hydraulic cylinders applying a roll pressing force. The other roll is a fixed roll with bearing housings horizontally supported on frame end pieces. The bearing housings are mounted on sliding tracks of two lower-flange and two upper-flange machine brackets. The two-roll machine includes a lower frame adjacent to the fixed roll, the lower frame lengthening the two lower-flange machine brackets. A transverse frame is connected to the two upper-flange machine brackets, the transverse frame having a clear opening width which permits the rolls to be moved through the transverse frame onto the lower frame. The frame end pieces are releasably connected to the lower-flange and upper-flange machine brackets.

Abstract: An annular casing for the press rollers of roller presses for the pressure comminution of particulate material, the outer surface of which casing always has a high degree of hardness and consequently a high wear-resisting capability, but the radially inner region of which casing has a lower degree of hardness to avoid casing ruptures, it is proposed according to the invention that the material of the casing consists of nodular cast iron with at least the alloying elements Ni and Mo and with a bainitic structure with residual austenite, and in that, to achieve a self-hardening surface, the boundary layer of the annular casing—contains martensite, which is constantly renewed by external pressure loading of the casing surface when the press roller is in operation.

Abstract: A seal for a grate cooler, in particular for a grate cooler that operates according to the Walking-Floor principle, the seal sealing two individual grate elements that move relative to one another against the penetration of cooled material between the individual grate elements, the seal having at least one individual sealing element.

Abstract: A method of controlling the operation of a bulk good grate cooler for cooling hot cement clinker, for example, in a process-controlled manner is provided in order to ensure that the volume flows of cooling air in all areas of the cooling grate and/or the residence time in the respective area of the bed of the goods to be cooled can be matched to the cooling requirements occurring in each area. A control intervention is carried out during the operation of the grate cooler with respect to the respective local cooling air volume flow and/or with respect to the respective local speed of conveyance of cooling grid according to the respective bulk good bed height measured per area and/or the bulk good bed temperature and/or the cooling air through-flow resistance such that if a modification occurs in one or several of the measured parameters, i.e., bed height, bed temperature and through-flow resistance, the respective local cooling air volume flow and/or the conveyance speed of the grate system is altered.

Abstract: In the design of a twin-roller machine, such as a roll press for comminuting a bed of granular material, with two rotatably mounted, counter rotationally driven rollers which are separated from each other by a roller nip, and which use hydraulic cylinders to provide a roller pressing force the hydraulic cylinders are arranged in such a manner that they act in each case both on the bearing housings of one roller and on the respectively opposite bearing housings of the other roller with a self-contained system of milling pressing forces being formed without a closed machine frame loaded by the roller pressing forces.

Abstract: A process and device for the reliable monitoring of the current condition of the protective jacket formed of fireproof material, in particular of a rotary tubular kiln burner lance, during operation of the kiln system. A compressed air ring main and/or an annular metal wire loop forming part of an electrical circuit extending around the circumference of the protective jacket are embedded in the fireproof compound of the protective jacket in the area of the burner tip, in which in the event of burning through of the ring main or metal wire loop, a connected pressure sensor or current sensor generates a monitoring signal.

Abstract: In order, for operating the lance burner of a rotary tubular furnace for the production of cement clinker from calcined raw cement meal, to provide an automated regulation method which is optimized in terms of the configuration of the burner flame for all types and quantities of fuels used, according to the invention a regulation method is proposed in which the characteristics of the burner flame are used as measurement variables, and the measurement variables are delivered to a controller which can vary at least three different manipulated variables of the burner, such as the spatial outflow angle and the swirl momentum of the swirled primary-airstream and/or the angle of divergence of the primary-air/jet-air jets emerging from individual nozzles and/or the velocity of emergence and/or swirl component of a stream of fragmentary alternative fuels or secondary fuels which is blown through the burner.

Abstract: In order to provide an automatically operating cooling air regulating device for a grate cooler for cooling hot bulk material such as cement clinker, for example, which can be constructed easily and can be used without problems both for non-moving and also in particular for moving cooling grate regions or moving cooling grate systems, a regulating device with a regulator housing which is arranged below the cooling grate, performs its movements with it and is flowed through by the cooling air supplied is proposed according to the invention, an inner body which can be moved translatorily by the cooling air flow being guided displaceably in the regulator housing and the free flow cross section of the regulator housing remaining for the cooling air being reduced automatically with increasing height inside the regulator housing of the inner body against which the cooling air flows, and vice versa.

Abstract: A two-roll machine, in particular a roll press, for interparticle comminution of granular material with two rotatably mounted, counter-rotating driven rolls separated from one another by a roll gap. Drive journals of the roll's shaft-mounted gearboxes are shaft-mounted as step-down planetary gear units. A machine table with a table platen is arranged under each of the shaft-mounted gearboxes that can move back and forth parallel to the roll shaft in at least one direction, and three vertically and horizontally adjustable supporting rests arranged in a triangle are arranged on the table platen on which the respective shaft-mounted gearbox can be supported offset-free and aligned with the roll shaft drive journal during its installation and removal.

Abstract: A roller press which is used, in particular, for material bed comminution and into the material feed hopper of which both coarse-grained material, such as, for example, fresh material, and fine-grained material, such as, for example, recirculated grits from a downstream sifter and/or, for example, fly ash, are introduced, wherein the stability of the material bed or grinding bed and therefore a high grinding efficiency are ensured despite the considerably different grain size and grain distribution in the two material flows to be drawn into the roller nip. A pressure screw which conveys the fine material under pressure is inserted into the material feed hopper through at least one fine-grain inlet opening in the hopper, a nozzle-like outlet, in particular a flat nozzle, of the pressure screw extending into a central region of a material draw-in of the press roller nip.