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| Number | Title | Issue Date |
| 7121713 | Swinging agitator for a gypsum calcining apparatus and the like An agitation mechanism for a gypsum processing apparatus which includes a housing having a bottom wall, and at least one side wall. The housing can be constructed and arranged to receive and process gypsum-based products. An agitator frame having a similarly shaped ... | 10/17/2006 |
| 6138377 | Apparatus and process for cooling and de-steaming calcined stucco The present invention is an apparatus and process for cooling and de-steaming hot calcined stucco used in the production of gypsum boards or bagged plaster. The apparatus is a fluid bed stucco cooler and comprises a cooler housing having a plenum with two... | 10/31/2000 |
| 5954497 | Method for multi-stage calcining of gypsum to produce an anhydrite product A method and system for calcining gypsum to recover gypsum in a form consisting essentially of calcium sulfate anhydrite is disclosed. The method includes the steps of feeding the ground gypsum material into a first kettle and heating the ground gypsum in... | 09/21/1999 |
| 5743728 | Method and system for multi-stage calcining of gypsum to produce an anhydrite product A method and system for calcining gypsum to recover gypsum in a form consisting essentially of calcium sulfate anhydrite is disclosed. The method includes the steps of feeding the ground gypsum material into a first kettle and heating the ground gypsum in... | 04/28/1998 |
| 5312246 | Heating and conveying apparatus An apparatus for heating and conveying a granular material is disclosed, and which comprises an elongate trough, and a framework mounting a plurality of transverse blades mounted above the trough. The framework is moved along a closed path of travel so th... | 05/17/1994 |
| 4522587 | Rotating melter A horizontally disposed helical coil is positioned around and in communication with a hollow horizontal shaft extending lengthwise of a tank having oppositely disposed inlet and outlet ports. Hot oil is directed into the hollow shaft and circulated throug... | 06/11/1985 |
| 4480924 | Stirrer-mixer for retorts in particular, wherein the insuffation is carried out through the stirrer itself To stir up and mix the substances held inside a retort, a blade is used, of a shape corresponding to that of the retort itself. Inside the blade there is a conduit, connected to outer devices for the admission of gas, and provided with a series of apertur... | 11/06/1984 |
| 4400155 | Equipment for heating pulverulent products Equipment for heating pulverulent products, including a relatively flat, vertically standing vessel for receiving the product, and a rotatable agitator whose axis of rotation is coincident with the longitudinal axis of the vessel. There are heating facili... | 08/23/1983 |
| 4268275 | Apparatus for converting organic material into fuel The apparatus includes a pyrolytic reactor in which an initial charge of charcoal is located. An inlet is provided for introduction of the organic material and an exit is provided for the resulting gases and ash products. The reactor is arranged to permit... | 05/19/1981 |
| 4238238 | Calcining kettle having means for returning stack exhaust gas to calcining mixture A calcining apparatus comprising a kettle, a heating chamber for heating the outside of the kettle, a stack for exhausting gas from the heating chamber, a duct connected at one end to the stack and having the other end extending for a limited distance int... | 12/09/1980 |
| 4230451 | Apparatus for the thermal treatment of organic materials A method of and an apparatus for the thermal treatment of organic materials, especially organic wastes, makes use of a horizontally elongated tank in which the waste is agitated in contact with a thermally conductive wall externally heated by the circulat... | 10/28/1980 |
| 4227873 | Kiln with overlying beds A novel kiln with overlying beds arranged about a central hollow shaft carrying rabble arms attached thereto and with alternate apertures formed in the floors between adjacent stories adjacent the hollow shaft and adjacent the periphery of the floor and w... | 10/14/1980 |
| 4215981 | Heating or combustion apparatus and method Furnace apparatus and method used to heat or incinerate materials which are being stirred or rabbled under atmospheres of corrosive gases, and which employs a new material of construction for fabricating rabble teeth to impart improved resistance to mecha... | 08/05/1980 |
| 4191529 | Furnace for heating solids The furnace is circular in plan and comprises an annular charge space charged through chutes in its top wall. Effluent gas offtakes are provided in the furnace outer wall and the level of the charge bed is maintained above the chute bottoms but below thos... | 03/04/1980 |
| 4188186 | Automatic calcining kettle A vessel is mounted above a furnace, and is used for retaining gypsum as it is calcined to prepare it for making wallboard or plaster. A feed of crushed gypsum supplies the vessel-kettle regulated by the temperature required to calcine gypsum. Calcined gy... | 02/12/1980 |
| 4161390 | Calcining kettle having multi-pass heating system A calcining apparatus comprising a kettle, a heating jacket surrounding the kettle defining a heating chamber, vertical baffles dividing said heating chamber into a plurality of chambers, and a plurality of horizontally disposed heating flues communicatin... | 07/17/1979 |
| 4115317 | Method and apparatus for regenerating and manufacturing activated carbon This invention relates to a system for regenerating and manufacturing activated carbon wherein the exhaust gases and vapors from the upper portion of a multiple hearth furnace are passed to a gas cooling apparatus such as a quencher or scrubber, the clean... | 09/19/1978 |
| 4113836 | Continuous gypsum calcination process and kettle therefor Continuous calcination of gypsum is provided by uniformly feeding uncalcined gypsum into the calcining batch in a kettle to a location below the surface but above the uppermost agitator, and allowing calcined gypsum to be discharged from the kettle throug... | 09/12/1978 |
| 3999938 | Reversible rabble tooth for furnaces An insertable and reversible rabble tooth for the rabble arms of furnaces including specially shaped wedges to clamp the rabble teeth to the rabble arm in either in hearth condition or in out hearth condition by reversing the positions of the wedges and r... | 12/28/1976 |
| 3961903 | Apparatus for reclaiming limestone mud Apparatus and process for reclaiming limestone mud wherein a supply of the mud in a wet condition is passed to a spray type dryer and dried to a bone dry free-flowing powder by the use of hot drying air from a calciner furnace. The dry powder together wit... | 06/08/1976 |
| 3932115 | Vented hopper with improved feed system An apparatus and method for feeding polymeric material to processing and mixing equipment is disclosed which includes a hopper located radially from the axis of rotation of the processing equipment in the direction of rotation and with walls that are incl... | 01/13/1976 |
