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| Number | Title | Issue Date |
| 7229527 | Method for the controlled thickening of low consistency fiber suspensions The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ... | 06/12/2007 |
| 6418637 | Method of sealing a rotary drum connection A sealing arrangement is provided between a rotary drum kiln and the stationary end thereof arranged in a material flow relation to each other, having enhanced effectiveness and requiring less maintenance. Pressurized gas, such as air, is fed to the conne... | 07/16/2002 |
| 6375797 | Bleaching chemical pulp in a PkDQ-Po Sequence In a method and apparatus for treating pulp, a peroxide treatment of chemical pulp, i.e., both sulphite pulp and kraft pulp, is used to quickly reduce the Kappa number of the pulp. The method involves treating a chemical pulp with at least hydrogen peroxi... | 04/23/2002 |
| 6354514 | Method and apparatus for treating material having poor thermal conductivity A method and an apparatus for heating or cooling material having poor thermal conductivity, especially medium-consistency fiber suspensions. The material is directed, substantially as a plug flow, at a velocity below 5 m/s (e.g. 0.1-1 m/s) through an appa... | 03/12/2002 |
| 6350348 | Batch cooking with black liquor pretreatment A method of cooking pulp in an alkaline batch process (using one or more batch digesters) improves pulp bleachability. The wood material is supplied to the digester; the cellulosic material is pre-treated in the digester with a first liquor, the first liq... | 02/26/2002 |
| 6340805 | Method of manufacturing a wire screen product The present invention relates to a method of manufacturing a wire screen product which is especially suitable for screening fiber suspensions of the wood processing industry. It is a characteristic feature of the method according to the invention of manuf... | 01/22/2002 |
