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| Number | Title | Issue Date |
| 7448565 | Low profile primary classifier A primary classifier (300) particularly suited for use in a bowl mill (10) of the type that is employed for purposes of effecting the pulverization of materials such as coal is provided by the present invention. The primary classifier (300) incl... | 11/11/2008 |
| 7341212 | Enhanced ore comminution process and apparatus A method and apparatus for comminuting particulate material by inter-particle comminution in a bed of particles are disclosed. The apparatus includes a vertical roller mill with a horizontal grinding table rotating about a verticle mill axis. At least one grinding r... | 03/11/2008 |
| 7267293 | High efficiency bowl mill A high efficiency bowl mill (100) is provided by the present invention. Included in the high efficiency bowl mill (100) is a plow (185) that is downstream of a grinding roll (180) on a grinding surface (145). The plow (185) ... | 09/11/2007 |
| 7252253 | Bowl mill for a coal pulverizer with an air mill for primary entry of air A bowl mill for a coal pulverizer with an air mill for primary entry of air, comprising a substantially closed separator body (2) having a central axis; and a bowl-like grinding table (3) mounted on a shaft (4) rotatable about said central axis,... | 08/07/2007 |
| 7226010 | Method and apparatus for solid fuel pulverizing operation and maintenance optimization A system for use with a roll bowl type mill for the pulverizing of solid fuels such as coal. The system includes hardware in the form of sensors and other components and software to among other things monitor the operating condition of the mill's moving parts and pr... | 06/05/2007 |
| 7118057 | Horizontal roller mill A horizontal roller mill to increase production yield. An example horizontal roller mill includes a cylinder and rollers. Each end of the cylinder includes an end cover, the end cover of one end includes an inlet and an end cover of the other end includes an outlet ... | 10/10/2006 |
| 7116839 | Optical measurement of vane ring throat area A method and device for optically measuring throat area in a vane ring for a gas turbine engine, the method according to one aspect of the invention following the steps of: placing the vane ring on a fixture with the periphery of each throat within an optical measur... | 10/03/2006 |
| 7100853 | Deflector for coal pulverizer/classifier A deflector disposed immediately above and outboard of a rotating vane wheel in a pulverizer/classifier is protected from wear and abrasion by side-by-side abutting high-hardness wear plates having an alloy content of approximately 15 percent chromium and three perc... | 09/05/2006 |
| 7051962 | Manure separator A novel separator housed within a shell for the separations of solid and liquid components from a slurry. The separator has two stages, a first static screen and rotating brush assembly section and a second stage, with a screen and a roller press and brush assembly.... | 05/30/2006 |
| 7028934 | Vertical roller mill with improved hydro-pneumatic loading system An accumulator assembly comprising at least two accumulators that are hydraulically interconnected to the same source of hydraulic fluid. Each accumulator containing an energy absorbing medium which is compressible when a movable barrier which separates the hydrauli... | 04/18/2006 |
| 7014733 | Belt for shoe press and shoe calender and method for forming same A method of producing an endless belt includes the steps of: securing axial fibers relative to a mandrel, the axial fibers being spaced apart from one another at desired intervals and extending substantially parallel to a longitudinal axis of the mandrel; applying a... | 03/21/2006 |
| 6966508 | On-line control of coal flow A system for balancing and controlling the distribution of pulverized coal into multiple equal diameter outlet pipes of coal pulverizers for improving boiler performance. The device includes a plurality of flow control elements, one flow control element for each out... | 11/22/2005 |
| 6923391 | Pulverizer The disclosed device is directed toward a pulverizer including a pulverizing chamber formed between a table, a cover, and side walls. The side walls are coupled between the table and the cover. At least three rotary plates are disposed in the table. Each of the rota... | 08/02/2005 |
| 6918195 | Drum device with permeable drum jacket and wire gauze mounted thereon under pretension It is known from the art to mount a wire gauze (10) onto a drum (1) with a permeable drum jacket (8) under pretension, for example, for allowing air to flow through a web of material placed on said drum, said wire gauze optionally being disposed... | 07/19/2005 |
| 6902126 | Hybrid turbine classifier A hybrid turbine classifier for a coal pulverizer includes a cone disposed within the separator body of the pulverizer. The cone extends downwardly from a base to a frustum which forms an opening for depositing coal particles on the grinding table of the pulverizer.... | 06/07/2005 |
| 6896213 | Device for supplying a material A device for supplying material to a container, particularly for supplying raw material to a vertical mill with air flow conveying in a milling plant. A conveyor is provided for the material, whereof an end region is located in a feed device. The feed device and the... | 05/24/2005 |
| 6820829 | Method and apparatus for separating material An apparatus for sorting particles composed of a mixture of particles with differing physical and chemical characteristics. The apparatus includes a comminutor or a pulverizer for reducing the size of the particles. The apparatus includes a mechanism for separating ... | 11/23/2004 |
| 6783091 | Two-fluted housing liner A pulverizer housing liner for the housing unit of an EL pulverizer is made up of an arcuate liner body having an inner curved surface forming a segment of the circular housing unit and two circumferentially spaced flutes fixed to the inner surface. ... | 08/31/2004 |
| 6685117 | Method for milling raw materials In a mill drying plant with a roller grinding mill and preferably in a cement production plant operated in compound with a clinker burning process and having a kiln fan and a fan downstream of a filter, a mill fan is connected upstream of the roller grind... | 02/03/2004 |
| 6644576 | Blade sweep for pulverizers A blade sweep for a pulverizer having a grinding bowl to which the sweep is attached and a floor with a discharged outlet over which the sweep is moved. One blade sweep disclosed is mounted to the bowl skirt and another blade sweep disclosed is mounted to... | 11/11/2003 |
| 6409108 | Damage-resistant deflector vane A deflectable vane member for a coal mill pulverizer throat. The vane is yieldingly mounted in the throat with a spring support member whose force is designed to hold the vane rigidly in place during normal operations, and to yield when the vane is struck... | 06/25/2002 |
| 6276620 | Milling plant and method for milling raw materials In a mill drying plant with a roller grinding mill and preferably in a cement production plant operated in compound with a clinker burning process and having a kiln fan and a fan downstream of a filter, a mill fan is connected up-stream of the roller grin... | 08/21/2001 |
| 6079648 | Arrangement for securing a vane wheel assembly to a grinding table of a pulverizing bowl mill An arrangement for supporting a vane wheel assembly of a pulverizer bowl mill that is operative to effect therewith a reliable and accurate securement of a vane wheel assembly to the rotating grinding table of the pulverizer bowl mill.... | 06/27/2000 |
| 6079646 | Blade ring for air-swept roller mills To reduce the manufacturing costs of air-swept roller mills and comparable mills, according to the invention a segmented polygonal blade ring is provided, which is manufactured from a plurality of polygon segments, which have planar surfaces and are prefe... | 06/27/2000 |
| 5971302 | Method and apparatus for drying and grinding moist material Apparatus and method for drying and grinding moist raw cement or other material wherein the moist material is introduced to a grinding zone at which it is ground to produce relatively fine and relatively coarse particles which are separated and delivered ... | 10/26/1999 |
| 5957300 | Classifier vane for coal mills An improved vane of the type adapted for use in the classifier cage of a bowl mill type coal pulverizer. The improved vane is designed such that its lower end extends below the classifier cage inlet when the vane is mounted in the inlet. In a preferred fo... | 09/28/1999 |
| 5944270 | Self-contained air seal assembly for coal pulverizer A bowl mill having a separator body, a grinding table and a plurality of grinding rolls for exerting grinding forces on material to be ground is provided with a plenum and a vane assembly for controlling the pressure conditions in the separator body. The ... | 08/31/1999 |
| 5908167 | Integrated high pressure drop rotating throat for a coal pulverizer A rotatable throat for a coal pulverizer is improved by creating a high pressure drop in the air ports which surround the throat. The lower portions of the air port nozzles are made of vanes and relatively thin sides, and shaped to provide air entrance ar... | 06/01/1999 |
| 5904307 | Pulverizer apparatus with horizontal axis pivot scraper A scraper assembly for use with an associated coal pulverizer or as part of a coal pulverizer having a vertical axis with a central hub that rotates during normal operation of the pulverizer. The scraper assembly includes a bracket dimensioned and configu... | 05/18/1999 |
| 5873156 | Coal pulverizer and method of improving flow therein An improved coal pulverizer classifying system including a classifier cone extension to protect coal flow into the pulverizer from the annular fine-lifting airflow from the pulverizer throat. The classifier cone extension replaces traditional intermittent... | 02/23/1999 |
| 5819947 | Classifier cage for rotating mill pulverizers An improved classifier cage for bowl mill type coal pulverizers which have been converted from stationary throats to rotating throats with reversed flow direction. The direction of the classifier vanes is reversed such that the rotational flow direction o... | 10/13/1998 |
| 5667149 | Solids pulverizer mill and process utilizing interactive air port nozzles A solids pulverizing mill for producing fine particles such as coal dust, which includes a housing having a centrally located coal feed chute and enclosing an annular-shaped air port ring containing multiple nozzles located around a rotatable grinding tab... | 09/16/1997 |
| 5622321 | Mill classifier The invention relates to a mill classifier or sifter, particularly a roller mill classifier, which is suitable as a high-performance classifier for a roller pan mill or a roller mill, e.g. for an air-swept mill. In order to achieve in the case of a partic... | 04/22/1997 |
| 5549251 | Pulverizer throat assembly A kit of segments is provided for replacing the throat of a coal pulverizer. The segments are so constructed that they may be assembled as either a rotatable throat or a stationary throat, and easily converted in place from one mode to the other. In the r... | 08/27/1996 |
| 5480099 | Mill sweep for pulverizers A brush-type mill sweep which is particularly suited for pyrite removal from the floor of a vertical spindle coal pulverizer. The mill sweep is secured at one end to the spindle or the shaft skirt, and the mill sweep includes a plurality of downwardly-ext... | 01/02/1996 |
| 5386619 | Coal pulverizer and method of improving flow therein An improved coal pulverizer classifying system in which the feedpipe and classifier cone are provided with extensions to protect coal flow into the pulverizer from the annular fine-lifting airflow from the pulverizer throat. The feedpipe and cone extensio... | 02/07/1995 |
| 5381968 | Apparatus and method for the crushing of material for grinding of differing grain size Fresh raw material is delivered to a crushing zone for crushing. Beforehand, fine particles are separated from the raw material by means of an airstream and directed into the housing of the crusher where they are entrained by an independent gas stream tha... | 01/17/1995 |
| 5350124 | Roll mill The invention relates to a roll mill having at least one pair of grinding rollers bearing against a substantially horizontal surface of a grinding table which is rotatable about a vertical axis. The rollers are mounted at one end of a roller support the o... | 09/27/1994 |
| 5340041 | Welded rotating annular passage segment for coal pulverizers with replaceable vanes and adjustable passage port area A removable rotating annular passage segment having a removable vane design is achieved by welding individual carbon steel parts into place. A welded passage segment having rails secured by a plurality of ribs is mounted to the grinding table of a pulveri... | 08/23/1994 |
| 5330110 | Apparatus for grinding material to a fineness grade A material reducing mill having a construction which operates to create a circulation of material in the mill to effect a thorough reduction of material added to the material undergoing reduction. The mill is further constructed with a rotary device which... | 07/19/1994 |
