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| Number | Title | Issue Date |
| 5711802 | Heat treatment of lime sludge A method and plant for heat treatment of lime sludge (CaCO3) formed by the causticizing process during the manufacture of paper pulp. The lime sludge is dried and pulverized in a first process stage and preheated in a second process stage by me... | 01/27/1998 |
| 5658142 | Material drying system A material drying system includes a pulse combustor having a combustion chamber and an elongate tailpipe forming a resonant system with the combustion chamber. The tailpipe has an inlet for material to be dried and an outlet through which the material is ... | 08/19/1997 |
| 5264013 | Method and apparatus for purification of exit gases from kiln installations In this method and this apparatus exit gases to be purified from kiln installations are first of all dedusted in a first filter stage and then in at least one further filter stage they are purified of the NHx compounds and/or volatile pollutant... | 11/23/1993 |
| 4728287 | Apparatus for uniformly drawing and cooling pyroprocessed particulate material Apparatus for cooling a bed of pyroprocessed particulate material such as lime received from a source as a kiln, the cooler including a shaft with one or more underlying hoppers through which the material flows as cooling air is forced upwardly therethrou... | 03/01/1988 |
| 4728288 | Apparatus for uniformly cooling pyroprocessed particulate material Apparatus for cooling a bed of pyroprocessed particulate material such as lime received from a source such as a kiln, the cooler including a shaft with one or more underlying hoppers through which the material flows as cooling air is forced upwardly there... | 03/01/1988 |
| 4323384 | Preheater for compacted vitrifiable material A preheater in the form of a vertical column for treating a vitrifiable composition introduced into the column at the top and which moves through the column by the force of gravity. The vitrifiable composition, which ultimately moves from the column to fe... | 04/06/1982 |
