Abstract: In cement clinker production lines having calcinator connected upstream of the rotary kiln and equipped with a second firing, in order that the most complete possible burnup or residual burnup, favorable from the standpoint of thermal economy, of uncombusted fuel constituents such as, for example, CO and/or uncombusted residual carbon be enabled in the calcinator, and indeed in the case of calcinators without, but in particular with, a device for the reduction of the NO.sub.

Abstract: This invention relates to a compact heat exchanger-ventilation unit, for vehicles driven by internal-combustion engines which is compact and permits use of a narrow, low hood. The cooling air fan 1 has a diffuser and the resistance of the heat exchangers on the cooling air side is adapted to the delivery level of the cooling air fan 1. A refrigeration system condenser 7, charge air cooler 6, transmission oil cooler 4, motor coolant heat exchanger 3 and hydraulic oil cooler 5 are thus compactly arranged.

Abstract: A differential pressure valve 6 is provided in an engine lubricating system which spills lubricating oil into a bypass line 5b bypassing a lubricating oil heat exchanger 7. Connected downstream of the differential pressure valve 6, is a pressure-maintaining valve 10, which holds the oil pressure approximately constant when the internal-combustion engine is running and protects the lubricating oil pump against too high a pressure upon starting of a cold internal-combustion engine.

Abstract: An apparatus for controlling the level of liquid in a centrifugal separator drum by regulating the flow of liquid out of the drum. The drum includes a plurality of circumferentially spaced openings in a radial end wall of the drum. The openings have movable weir plates in one form controlling the openings with the weir plates movable and positionable in a radial direction by axially movable linkage. In another form, a conduit passage leads from an end opening. By controlling the flow through the openings in the end wall, the liquid level is functionally controlled within the drum. The control mechanisms are situated externally of the drum for ease of repair and to provide control which can be continually monitored.

Abstract: A high pressure roller press formed between opposed cylindrical rollers mounted to perform interparticle crushing or product bed comminution in the nip and having pockets in the surface of a size to retain compressed fine grained material which is pressed in the nip with the compressed material in the pockets being retained for full revolutions of the rollers and coacting with hard portions between the pockets to form the product bed comminution against material passing through the nip and drawing material into the nip.

Abstract: A centrifugal solid bowl worm separator having an outer cylindrical drum and an inner rotatable worm with helical flights on the outer surface with the drum arranged to receive a material to be separated in light and heavy fractions or phases and the mechanism provides for a method of injecting and mixing a fluidizing substance into the heavy fraction material within the drum before it leaves the drum to mix with the heavy fraction within the drum. The fluidizing substance lowers the density of the heavy fraction to enable its discharge by the worm flights. The hydraulic pressure of the liquid helps push the heavy fraction out of the separator which prevents a reverse flow and intermixing of the heavy fraction with the liquid fraction.

Abstract: A rotary centrifuge for the separation of substances at different density having an outer cylindrical housing and a worm within the housing and the worm and housing driven at different rotational speeds, the housing having an opening for the discharge of the heavier fraction with the opening controlled by an external control element preferably stationarily supported and connected by a linkage to a movable valve member for controlling the opening, preferably a ring which moves axially to change the size of an annular discharge gap between the ring and a circular discharge opening in the end wall of the drum, but the opening can also be in the form of axial radial facing openings controlled by a movable valve member.

Abstract: Wear-resistant armoring on the outer surface of a roller for a high pressure roller press capable of interparticle crushing of granular material wherein the armoring is composed of axially extending welding beads horizontally welded along the roller either without spacing from one another or with slight spacing.

Abstract: A grinding system for grinding brittle material such as used in the manufacture of cement including a high pressure roller press operated with high pressing forces to form interparticle crushing with incipient cracks in the interior of the particles including recirculating a portion of the material delivered from the press to a sifter locating the sifter directly above the nip and delivering the sifted material downwardly into the nip retaining the structural height of the system low and delivering fresh stock laterally directly into the nip of the roller press to merge with the sifted material entering directly into the nip of the roller press.

Abstract: A method and apparatus for calcining fine grained material in the manufacture of cement clinker wherein material is preheated and partially calcined in a cyclone preheater, further partially calcined by a waste zone wherein waste material such as used tires are burned in an excess of oxygen, completely calcined in a kiln, the exhaust gases from the waste zone and kiln fed to a separate auxiliary burning zone which is supplied only with fuel and utilizes the excess oxygen from the waste zone reducing the presence of CO and the CO surges, and the heat from the burning zone is fed to the preheaters to further precalcine the material.

Abstract: A centrifugal apparatus including an annular shell of flexible material with annular end rings and means for driving the shell in rotation through the end rings, an external discharge roller in engagement with the outer surface of the shell and directing material toward a discharge nozzle within the shell with the nozzle leading outwardly for delivery of the material from the shell. In one form, the ends of the shell are connected to the rigid ends by rings of flexible material. An arrangement is provided for applying axial tension to the flexible material of the shell.

Abstract: A separator for separating fractions of granular material particularly for use in an interparticle crushing product bed comminution press including an outer conically shaped chamber with means for receiving air and the product to be comminuted at the lower end of the chamber, an inner conical chamber, a second coarse grits outlet leading from the inner conical chamber, a first coarse grits outlet leading from the outer conical chamber, a rotor at the upper end of the inner conical chamber having turbo elements thereon, baffles surrounding the turbo elements, and a fine products discharge from the upper end of the inner chamber with the coarse grits discharge from the outer chamber led back to the inlet of a high pressure interparticle crushing roller mill and the fine grits material discharged from the inner chamber led to a tubular mill.

Abstract: A two roller machine, and more particularly a roll type crusher, which comprises two oppositely driven rollers rotatably seated in a housing and having gearings connected to the drive journals of the rollers, the gearings being flexibly connected to one another by torque supports for absorbing the reaction moments and said torque supports being formed as two-armed lever plates and being rigidly joined to the gearing. A considerable simplification of the torque support is inventively achieved in that levers are rotationally arranged at the outer, opposite ends of the lever plates formed as torque supports, said levers being connected to one another by a toggle link.

Abstract: A rotary drum for tumbling a granular product therein for heat transfer or drying with arcuate baffles mounted on the inner surface of the drum with the concave surface of the baffles facing outwardly and the baffles having rims at the ends to restrict discharge of material from the baffles and the baffles being offset circumferentially in a trailing downstream direction with openings through the baffles and an angled downstream edge of certain baffles with other baffles having a portion of the downstream edge removed and the baffles formed in two sections hinged to each other with the ends secured to the inner surface of the drum.

Abstract: An apparatus for smelting meltable substances, particularly ore concentrates. A transfer element joins the cyclone discharge to the furnace and is arranged between the melting cyclone and the furnace. In this way, the fitting, particularly the re-fitting of an open-hearth furnace with a melting cyclone can be significantly simplified; or, on the other hand, the melting cyclone can be very easily dismantled for the purpose of repair or can be replaced by another melting cyclone in a relatively short time, namely without a significant interruption of furnace operations.

Abstract: Waste materials, potentially following their comminution and potentially following their dying or, respectively, preheating, are burned in a cyclone kiln (buring cyclone or, melting cyclone) at extremely high temperatures above 1500.degree. C. with formation of a molten slag low in noxious substances and a hot exhaust gas in which latter the valuable substances and/or noxious substances contained in the waste materials volatilize, whereby dusts enriched with valuable substances on the one hand and, on the other hand, dusts enriched with noxious substances are respectively separately separated out of the exhaust gas by partial condensation.

Abstract: In a double roll machine such as roller presses for extremely high drive power requirements without having to employ heavy and bulky drive motors with intermediate gears operating under the principles of product bed pressing, both long ends of both rollers of a double roll machine are constructed as drive journals and all four drive journals each are driven by a separate drive motor, particularly by a slip-on gearing, i.e., that the two rollers of the double roll machine be driven with a total of four drive motors with resistant and shock torque shared equally at both ends of the rollers.

Abstract: A method and apparatus for separating mixtures of different densities into a lighter phase and a heavier phase including a rotary drum providing a cylindrical settling sump at the outer wall, a displacement member rotatably located within the drum forming a settling sump between the displacement member and the drum wall, a discharge element for lighter phase material spaced radially inwardly from the settling sump, a discharge conductor for heavier phase material leading from the settling sump at the deepest location at the outer circumference of the drum, and a compressed air conduit connected to the discharge for heavier phase material aiding in the removal thereof, and vanes on the displacement member aiding in movement of the material through the drum.

Abstract: An improved cone crusher with an eccentrically driven crushing cone, crushing jacket outside of the cone defining a crushing nip therebetween, the cone is driven in an oscillating manner tilting about its vertical axis and is connected to a driven through a universal joint having a one way clutch connected between the joint and a drive shaft with a support for the cone and a cap having a reduced portion which can shear in torsion, and means for holding the cone on a support with controllable force.

Abstract: A method and apparatus for the manufacture of cement from raw cement meal wherein the meal passes through a series of preheating cyclones, through a calcining zone, through a rotary sintering furnace and to a cooler with the flow of meal from a penultimate cyclone heat exchanger divided into subflows with one chamber receiving air from the cooler and also receiving burning fuels that are extremely difficult to burn and both calcining chambers delivering meal to the last heat exchanger for delivery to the furnace.