Abstract: The present invention relates to rubber pellets made of an amount of vulcanized rubber and an amount of binder, with the vulcanized rubber preferably being discarded rubber. Additionally, the rubber pellets will preferably contain an amount of filler materials which are plastic or rubber or combinations thereof so that the preferred rubber pellet contains an amount of rubber equal to between about 50% and about 95% by weight of the rubber pellet, an amount of filler material equal to between about 0 and about 45% by weight of the rubber pellet, and an amount of binder equal to between about 5% and about 10% by weight of the rubber pellet. The rubber pellets are used in the formation of asphalt and are desirable because they provide necessary constituents to the asphalt and allow for elimination of equipment and separate ingredient addition steps from the asphalt formation process. The present invention is also desirable because it provides for a way to desirably dispose of waste rubber materials.

Abstract: The present invention employs a main shaft cantilevered from a frame. A die holder is disposed around the outside of the shaft, and in the preferred embodiment rotates by the use of adjustable tapered roller bearings around the shaft. Fixed to the die holder is a die, and the die and die holder define a pelletizing chamber. The shaft supports a roller frame with a plurality of rollers within the pelletizing chamber. The resulting construction is a pelletizer shaft support structure that uses only a single set of bearings. In the preferred embodiment, the main shaft is comprised of an inner shaft and an outer shaft. The inner shaft is located coaxially within the outer shaft and supported within the outer shaft by static bushings. The roller frame and rollers are mounted to the inner shaft. The inner shaft and the outer shaft are both fixed to the frame structure.

Abstract: A method for the production of spherical granulated materials from powdered solids and the granulated materials produced by it are disclosed. The method is characterized in that the powdered solids are moistened, possibly together with the usual binders, flow agents and plasticizers for the compression of solids, by the addition of a corresponding quantity of liquid and mixing smoothly in a mixer; they are then compressed with a ring collar mill into cylindrical agglomerate and then rounded in a rounding unit with wrinkle washer. The granulated solids thus produced have a very narrow particle size distribution and are distinguished by good flowability and good dispersability, depending on process controls.

Abstract: An apparatus for forming pellets in which a medium to be pelletized is delivered to a distribution box, the distribution box intermittently expelling discrete portions of the medium outwardly to form droplets. A conveyor moves the droplets away from the distribution box, the droplets solidifying into pellets as they travel along the conveyor.

Abstract: Die for granulation presses, particularly for the manufacture of feed granulates, consisting of a cylindrical, cross-sectionally circular center element (1) having a plurality of granulating bores and connecting flanges (2,3) formed on the two ends of the center element, whereby the center element (1) and the connecting flanges (2,3) consist of separate elements. The center element (1) is made of wear-resistant steel and the flanges (2,3) are made of a highly durable steel. The connecting flanges (2,3) are heat shrunk onto the ends of the center element (1).

Abstract: A granulating apparatus comprising a device which adds a binder of an epoxy resin or the like into a powder to-be-treated, a screw feeder which conveys the powder to-be-treated containing the binder, and rolls which compression-molds it. By rotating the screw feeder and the rolls, the powder to-be-treated is caused to induce internal friction and to generate heat, thereby to temporarily dissolve the binder, whereupon the powder to-be-treated is pelletized. In order to temporarily dissolve the binder, the granulating apparatus is equipped with a device for measuring the temperature of the powder to-be-treated, and a controller for controlling the stirring speed of the screw feeder and the molding speed of the rolls on the basis of the measured value so as to establish a desired temperature.

Abstract: Apparatus for extracting precious metals from their ores in which the ore is particulated and mixed with a binding agent to form a paste. The paste material is discharged into a rotary drum at an extruding station where it is pelletized by forcing it through a perforated sidewall of the drum. The pellets are discharged onto a conveyor belt and are transported to a spray station where they are wetted with a lixiviant solution. The lixiviant coated pellets are then dried by exposure to a heated air stream at a drying station as they are transported to an open air curing stockpile. The cured pellets are heaped in a pile and are then washed with a water spray to yield a pregnant solution of a precious metal salt.

Abstract: A method and apparatus are provided for controlling the amount of dry particulate matter and liquid added to a rotary pelletizer. A transducer placed within the pelletizer senses a characteristic of the mixed material in the pelletizer. This characteristic may be, for example, the level of the batch or the size of the pellets. The transducer signal is then conditioned to provide a signal level corresponding to a desired characteristic level and which varies about that level corresponding for example to the variations of pellet size about a desired size. That signal is added to a second signal representing the actual liquid flow into the pelletizer or added to a second signal representing actual dry particulate flow into the pelletizer and modulates that respective flow to maintain the input of either the dry or the liquid material into the pelletizer as necessary. Additionally, a set point signal can be provided as a constant signal representing desired dry particulate in flow or liquid in flow.

Abstract: A process for preparing a polytetrafluoroethylene granular powder which comprises subjecting a finely divided polytetrafluoroethylene to agitation in an aqueous medium consisting of water and organic liquid having a specific surface tension and being incompatible with water in an apparatus to form agglomerates, passing said agglomerates through a crushing mechanism and continuously recycling said crushed agglomerates for further agitation and crushing, said crushing mechanism being capable of lowering an average particle size of the agglomerates composed of primary particles having a particle size of 1 to 200.mu. by partially crushing agglomerated particles having an improper large particle size or abnormally large aggregates. The obtained polytetrafluoroethylene granular powder has a narrow size distribution and an improved flowability, in which at least 90% by weight of a whole granular powder has a particle size of at most 1000.mu.

Abstract: A method of forming spherically shaped pellets of relatively small diameter is disclosed which comprises the steps of depositing a finely divided congealable material on a surface of a disk shaped body, transporting the body over a closed course which extends in a plane forming an acute angle with the horizontal while rotating the body during the transport in the plane of the course thereby imparting a tumbling motion to the material and resulting in the fabrication of pellets, and collecting pellets of a predetermined range of sizes. A pelletizing apparatus is described which is adapted for forming pellets of relatively small diameter having enhanced surface characteristics and for automatically classifying the pellets by size.