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| Number | Title | Issue Date |
| 7255556 | Method and apparatus for conveying powder and heat An apparatus and method for the horizontal conveying of a dry powder is provided, notably useful for conveying heat from a heat-producing operation to a heat-consuming operation. In this application, heat is conveyed by a hot powder flowing through a vertically vibr... | 08/14/2007 |
| 6390810 | Method and apparatus for reducing a feed material in a rotary hearth furnace A rotary hearth furnace for reducing a feed material is disclosed. The rotary hearth furnace includes a rotating hearth disposed in an enclosure and mounted for rotary movement. The enclosure includes an annular inner wall, an annular outer wall and a roo... | 05/21/2002 |
| 6296479 | Direct reduction method and rotary hearth furnace Raw materials, including a metal oxide and a carbonaceous material, are supplied into a rotary hearth furnace. Then, the raw materials are heated and reduced by burners, which are arranged to cause a strong stirring action for an atmosphere around the raw... | 10/02/2001 |
| 5762010 | Method and device for processing waste having a calorific value A thermal method for continuously processing waste having a calorific value and any degree of moisture, wherein waste is put in a flow of hot, heat-resistant, heat-exchanging material which is warmer than 100° C. The heat exchanging material cools due to... | 06/09/1998 |
| 4902345 | Treatment of refractory carbonaceous and sulfidic ores or concentrates for precious metal recovery The recovery of precious metals from refractory carbonaceous and sulfidic ores or concentrates is improved by subjecting an oxidized slurry of this type of ore to thiourea leaching in the presence of carbon instead of subjecting the slurry to cyanidation ... | 02/20/1990 |
| 4853024 | Scrap recovery apparatus The invention provides an improved apparatus for use in processing wet scrap textile glass fiber into a dry flowable powder. The apparatus includes a unique inlet and outlet structure to prevent clogging during operation. The apparatus also includes a uni... | 08/01/1989 |
| 4779163 | Method and apparatus for controlling electrostatic charges in fluidized beds A fluidized bed method and apparatus involving a grounded electrically conductive bed for controlling or eliminating electrostatic charges therein and high surface area charge dissipators.... | 10/18/1988 |
| 4663145 | Device for an method of working up pickling and etching liquids A device for and method of working up etching and pickling liquids consisting of a vertical furnace having one or more vertical reaction spaces through which balls move at a maximum packing density. The furnace has a temperature gradient from the bottom (high)... | 05/05/1987 |
| 4576573 | Heating a fixed-bed charge in a tube reactor, and an arrangement for carrying out the method A fixed-bed charge in a tube reactor is heated, and at the same time heat is conducted away from, or into, the fixed bed, by a method in which the fixed bed is heated by means of a fluidized material which conducts away and supplies heat and flows through... | 03/18/1986 |
| 4537571 | Process of and apparatus for reheating and conveying a granular heat carrier In reheating and conveying a granular heat carrier, such as sand, using a carrier gas, where the heat carrier may be utilized for desorption by heating a charged lumpy adsorbent, the heat carrier is circulated through a vertically arranged cycle loop. Ini... | 08/27/1985 |
| 4523906 | Device for drying gypsum Cold, wet gypsum is admixed to a moving bed of hot solid particles of a heat-retaining material. The mixture is fed to a moving bed type drier where it is agitated while the released vapors are withdrawn. After discharge from the drier, dry gypsum is sepa... | 06/18/1985 |
| 4474553 | Process and apparatus for drying or heating a particulate material A process and apparatus for drying or heating a particulate material by means of heat transfer media which is brought into direct contact with the particulate material within a continuously rotating cylindrical drum. The particulate material flows in one ... | 10/02/1984 |
| 4457788 | Particulate medium for fluidized bed operations This invention relates to non-abrasive, lubricative, particulate solids, e.g. graphites, lime, calcium oxides, zinc oxides and compounds of higher saturated fatty acids, particularly, stearate salts, and their methods of use as fluidized bed media for pre... | 07/03/1984 |
| 4454053 | Additive for the water circulating in civil and industrial heating plants This invention is relevant to a method for saving fuel in heating plants which utilize thermal energy obtained through combustion of fuel in a boiler and in which the heat transfer medium is circulating water, said method consisting of mixing the circulat... | 06/12/1984 |
| 4258779 | Method and apparatus for conveying very fine solid material The present invention provides a method and apparatus for conveying very fine material, for example, a material where 100 percent of the material is less than fifty microns in diameter, and 50 percent of the material is less than five microns in diameter.... | 03/31/1981 |
| 4251208 | Process and installations for transferring heat and their applications for the treatment of raw cement The present invention is directed to a process for transferring heat between two gases having different temperatures through the intermediary of a solid heat-carrier, which process may be possibly applied to the treatment of a raw cement. In said process ... | 02/17/1981 |
| 4203721 | Method of heating plastic pipe An inplace gasket belling machine wherein a plastic pipe is received in a tilt clamp fixture and tilted thereon for receiving a heating bell on one end portion of the pipe. Heated fluid is directed over the inserted pipe end portion. The heating bell may ... | 05/20/1980 |
| 4201695 | Arrangement for regenerating particulate adsorbents A reaction vessel for regenerating particulate adsorbents has a bottom outlet and top inlets for admission of the adsorbent to be regenerated by being heated to a regeneration temperature, and for a particulate regenerating material at a temperature above... | 05/06/1980 |
| 4193758 | Granular bed heating method Methods and apparatus for roasting a product with a heated granular bed are disclosed. A granular bedding, heat transfer material such as salt or the like contained within a rotatable heating chamber is directly exposed to a heat source which directs heat... | 03/18/1980 |
| 4188185 | Method and apparatus for the treatment of particulate materials A process and apparatus for treating materials, such as solid, particulate material, wherein the particulate material is introduced into a heat transfer medium, the density of such medium being different from that of the particulate material and the tempe... | 02/12/1980 |
| 4153411 | Rotary sludge drying system with sand recycle A process and system to dry wet sewage sludge with hot sand and to burn the dried sludge. The sand is heated in a sand heater by burning dried sludge, and the hot sand is transferred to a sludge dryer. Wet sludge is mixed with the hot sand in the sludge d... | 05/08/1979 |
| 4076504 | Waste gas purification apparatus A waste gas purification apparatus having an elongated vertical hollow furnace shaft adapted to receive pebbles therein with a waste gas inlet at the lower end with a pebble discharge means at said lower end. At the top of the shaft is a narrow exhaust ga... | 02/28/1978 |
