Abstract: A rotary drum comprising a bearing ring loosely arranged on the drum shell and spacer plates arranged between the ring and the shell, a pair of elements for axially holding a spacer plate in position being provided at one end of each spacer plate, one retaining element being arranged on the drum shell and the other retaining element being arranged on the spacer plate. This construction enables the spacer plates to be readily replaced and the radial clearance to be changed without any need to loosen a retaining element fixed on the drum shell.

Abstract: A device for treating solid and/or liquid materials comprises a drum driven for rotation about a horizontal axis by means of an endless chain.An expensive toothed rim surrounding the drum is avoided, as it is possible that the chain engages a toothless portion of the drum periphery.

Abstract: A rotatable drum apparatus for use with a drying kiln or a dry grinding mill has a large gear wheel secured to the periphery of the drum, the drum being heated. In order to minimize the generation of undue stresses between gear wheel and drum due to thermal gradients, the apparatus includes a stationary heat shield extending about the gear in thermal stabilizing relation therewith. The arrangement includes air pressurization within the shield and seal means between stationary and rotary components, to limit the loss of heated air from the enclosure, and to preclude the ingress of air and foreign particles into the enclosure.

Abstract: A method for preheating a rotatable fluidizable bed (106) comprises rotating the bed chamber (112) slowly to cause the particles (114) to slowly tumble and mix. During tumbling, one or more burners (150, 160) extending into the chamber (112), heat the particles (114) until the desired operating or ignition temperature is reached. Temperature sensors (170) in thermal communication with the bed particles (114) sense the temperature and provide either an indication thereof or an initiating signal which, in the case of a rotating fluidized bed combustor (10), terminates preheating, accelerates the bed chamber (112) rotation to normal combustor (10) operating speed and/or introduces fluidizing air and/or fuel flow through the bed chamber (112).

Abstract: A rotary drum for the heat treatment of bulk goods, with the drum being mounted by means of thrust rings. Wedges are arranged on the outer periphery of the shell of the rotary drum, the wedges being disposed opposite to one another at a spacing corresponding approximately to the width of the thrust ring. Those inclined surfaces of the wedges which inclined surfaces face toward each other cooperate with insert pieces, the insert pieces being fastened on the thrust ring and being provided with counterwedge surfaces. The inclined surfaces of the wedges and the counterwedge surfaces are arranged on the outer periphery of the shell of the rotary drum successively flip symmetrically.

Abstract: In rotary tubes (1), an insert (4) which expands under the influence of heat can be moved in the radical direction in a cold outer casing (3) by means of an end plate (19) but is fixed in the axial direction, whereas other plates (20, 21) of the insert (4) have cogs (27) which are guided in sliding grooves (16) parallel to the axis due to the thermal expansion, each plate (20, 21) being provided with at least three cogs (24) and three sliding grooves (16) over its periphery.

Abstract: A drive mechanism for a rotary drum having a toothed ring which is disposed on the outer periphery thereof with a clearance in relation to the drum and which meshes with a drive pinion, the toothed ring is secured to a cylindrical support arranged concentrically to and with a clearance from the drum, and mutually spaced circumferential portions of the cylindrical support are respectively secured to the drum and to the toothed ring, the support being elastically flexible whereby the toothed ring is able to move radially of the drum with flexure of the support. The toothed ring is held in mesh with the drive pinion by guide and support elements which are disposed at the same radial distance from the drive pinion axis but which are angularly spaced about the axis and bear on an inner peripheral surface of the toothed ring.

Abstract: A process for the production of heated aggregate mix, such as bituminous mix, and a reactor for carrying out the process. In one aspect, the process entails the control of gas flow through a tumbler drum, preferably by controlling exhaust from the drum, in dependence upon the continuous monitoring of a parameter, such as gas pressure within the drum. In a second aspect the aggregate contents of the drum are heated by using a burner to preheat the gas flow, a technique which permits admission of the drum feed as a homogenous stabilized mix.

Abstract: A freely oscillating moving element (12-14-16), according to a radial axis with respect to the furnace wall (1) and having an inner appendix (12) deviated from the axis and with an outer counter-weight (16), can oscillate between two angular positions defined by pawls, towards the first of such positions said moving element is cyclically moved during the moving element lowering trajectory with the rotation of the furnace while towards the second angular position said moving element is cyclically moved during the moving element raising trajectory with the furnace rotation; said moving element can reach said second position only when the inner appendix (12) emerges from the material contained in the furnace.

Abstract: A cable suspension system for a rotary drum is disclosed which includes cable tension adjustment features providing dynamic load equalization, traction control and variable load distribution. The system includes an endless cable and at least one set of axially aligned support sheaves suspending the drum at its dynamic center of gravity. The system further includes devices for connecting wire rope in endless loops which incorporate load bearing, adjustment, and flexure features minimizing wear of the wire rope.

Abstract: Individual suspension of satellite cooling tubes with the aid of wire cables in the region of the discharge end of a revolving tubular kiln in two support locations spaced apart on the axial direction. Each suspension unit comprises a number of suspension elements selectable according to the operative requirements. These elements preferably include three pretensioned wire cables anchored to suitable retaining elements secured to the kiln casing. In a preferred embodiment, the wire cables are arranged so that two of them exert upon the associated cooling tube a tractive force, the resultant of which is oriented towards the kiln axis, whereas the third wire cable, which is anchored by at least one resilient element, applies to the cooling tube a force directed in opposition to the resultant and of equal value.

Abstract: An improved laundry dryer having a novel hot air compartment structure that heats recirculated exhaust air and fresh make-up air. The novel hot air compartment structure, in preferred form, includes an attic chamber defined by the dryer's housing. The attic chamber is divided into upper and lower subchambers, a heater housing being positioned within the lower subchamber. The heat source in the heater housing serves to directly heat fresh make-up air and recirculated exhaust air simultaneously within the heater housing, and also serves to heat up the upper and lower subchambers of the attic chamber. The recirculated exhaust air is introduced into the upper subchamber, thereby pre-heating same prior to introduction into the heater housing, and is subsequently introduced into the heater housing in a vertically downward flow path fashion.

Abstract: A mounting device for kiln hardware comprises two standards connected to the kiln wall and projecting inwardly through the refractory. One standard is connectable to the hardware through a removable pin. The hardware and the other standard are provided with cooperating means which prevent rotation of the hardware about the pin when the pin is installed. The members are designed so that removal of the pin allows removal and replacement of the hardware.

Abstract: An arrangement is disclosed for supporting a rotary drum such as a rotary kiln resting upon a foundation. The support arrangement includes a weigh beam positioned in a horizontal plane and pivotally supported on the foundation. At least two carrying beams are poitioned in a generally horizontal plane adjacent said weigh beam and each of the carrying beams are pivotally mounted at one end thereof to the foundation and flexibly supported at another end thereof by the weigh beam. A roller for rotatably supporting the rotary drum is supported on the carrying beams by bearings. The support arrangement thereby effects a substantial mechanical equalization of the forces exerted on the roller during the rotation of the drum to warping and twisting of the drum.

Abstract: A process and apparatus for measuring relative movement between loose raceways and a revolving drum consisting of generating pulses for one or more revolutions of the raceways by a contactless pulse generator in the area between the motor and a gear input shaft and via contactless pulse generators on the raceways for one or more revolutions of the raceways, the difference of the pulses being determined with a predetermined constant value for the revolving drum and the difference being recalculated for the relative movement.

Abstract: A service stand integral with the rotary kiln carrying mechanism to facilitate field maintenance of the kiln roller supports and eliminate the danger inherent in field constructed blocking.

Abstract: A rotary drum for treating materials comprises a drum shell having a generally tubular configuration wall and one or more unitary material treating members forming a portion of the wall. In a preferred embodiment, the drum shell comprises a plurality of ring-shaped sections mechanically joined together in axial alignment wherein at least one of the sections has a unitary material treating member forming a portion of the section wall. In typical applications the treating members are cast steel members and the remaining portions of the drum shell are predominantly plate steel.The advantages of this drum include easier fabrication with a reduction in the extent of welding, avoidance of welding in inaccessible locations, elimination of abrupt changes in thickness and, in operation, a reduction of unwanted shearing stresses.

Abstract: A rotary retort furnace wherein the retort is supported for rotation at only one end outside of the heated furnace shell such that the retort is cantilevered into the shell. The rotary retort has a charging door mechanism that cooperates with a skip hoist loading mechanism to provide charges of the parts to be heat treated that are of a uniform size and are introduced into the retort so as to minimize the loss of any controlled atmosphere. The skip hoist loading mechanism has a vibrating feed hopper that dispenses a weight controlled charge into a skip hoist bucket which, after receiving the predetermined charge of parts, is held in a ready position until such time as a cam mechanism controlling the opening and closing of a door on the charge end of the retort causes the door to open and the skip bucket to be moved to a position wherein the parts are dumped into the retort for heat treating.

Abstract: An apparatus for use in drying various kinds of finely divided materials utilizing microwave heating means for heating a rotating drum through which the material to be dried is drawn by suction. The apparatus includes means for separating the dried material from the air in which it is entrained during its travel through the drum.

Abstract: A first cylindrical drum member having an inlet portion for receiving materials to be treated, such as preheated coal and char includes a longitudinal axis and an outlet portion through which the treated materials are discharged into the inlet end portion of a second cylindrical drum member. The second drum member is independently supported for rotation relative to the first drum member and has a longitudinal axis coplanarly aligned with the longitudinal axis of the first drum member such that the drum members are concentrically positioned in tandem relative. A sealing assembly is connected to the first and second drum members for longitudinal movement with the drum members during expansion and contraction of the drum members as they are subjected to different temperatures.

Abstract: The ends of refractory-lined rotary kilns are often subjected to such intense heat flux that the steel shell of the kiln at either or both ends is subjected to substantial thermal expansion in both the longitudinal and circumferential directions, resulting in premature cracking and failure of the refractory. The present apparatus is a rotary kiln wherein either or both ends of the steel shell thereof are provided with a plurality of substantially longitudinal slots which accommodate circumferential expansion and the refractory is affixed to the steel shell at such end(s) with sliding anchors to accommodate longitudinal expansion.

Abstract: The present drying drum includes a roller supported drum jacket which is connected at one end thereof to a drive shaft by means of radially extending arms whereby the drive shaft extends coaxially with the rotational axis of the drum jacket. The drive means proper are guided relative to said drive shaft by guide means forming part of the drive shaft itself or either by a bearing surface forming part of a spur gear connected to the drive shaft. The drive means are further connected through a guide rod with an abutment means for taking up the drive reaction.

Abstract: Crop drying apparatus comprises a horizontal rotatable drum divided internally into a plurality of outer chambers for containing crop to be dried, and a central, axially-extending, multi-sided duct which receives an axial air flow. The inner surface of each chamber has a perforate area to permit flow of air from the duct into the chamber to dry the crop therein and the outer surface of each chamber has a perforate area to permit discharge of moisture-laden air from the chamber to the surrounding atmosphere, the inner perforate area of each chamber leading the associated outer perforate area in the normal direction of rotation of the drum. Control flaps are provided to control the air flow through the inner perforations during rotation of the drum.

Abstract: A method and apparatus for connecting a rotary drum drive, particularly a rotary drum drive of a rotary furnace or kiln, after disconnection for a short time, and before standstill of the oscillating drum, features detecting the movement of the oscillating drum and connecting the drive motor at a turning point of the oscillation or upon agreement with the direction of movement and the driving direction.

Abstract: The specification describes an installation for producing cement in which a mixture of limestone and clay minerals is ground to raw flour and the raw flour is calcined in a rotary kiln with the supply of heat and is kilned to form clinker. Downstream from the rotary kiln an air flow mill is arranged, to which the clinker from the rotary kiln is passed. It has a fresh air supply duct for cooling the clinker during the grinding operation and the outlet for material to be ground is connected with the cement flour bunker with the use for this purpose of a filter and a blower.

Abstract: A stand is provided to carry a pressure roller in horizontal engagement with a longitudinal surface of a raceway about a large rotating kiln or other drum, the roller being displaceable in a longitudinal direction to force the raceway to oscillate across its radial support rollers, thereby to increase the life of the raceway under wear from concentrated mechanical support stresses. An hydraulic cylinder selectively displaces the roller by acting on a frame on or in which the pressure roller is carried.