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AssigneeDegussa AG
InventorsClaas-Jurgen Klasen, Martin Foerster, Andreas Hofler, Klaus-Peter Bauer, Herbert Riemenschneider, Oliver Franta, Rainer Gilg
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A method for the production of spherical granulated materials from powdered solids and the granulated materials produced by it are disclosed. The method is characterized in that the powdered solids are moistened, possibly together with the usual binders, flow agents and plasticizers for the compression of solids, by the addition of a corresponding quantity of liquid and mixing smoothly in a mixer; they are then compressed with a ring collar mill into cylindrical agglomerate and then rounded in a rounding unit with wrinkle washer. The granulated solids thus produced have a very narrow particle size distribution and are distinguished by good flowability and good dispersability, depending on process controls.
A method for the production of spherical granulated material from powdered solids, said method comprising adding a moistening agent and optionally an additive to powdered solids in a mixer, uniformly moistening said solids, mixing and pressing said solids into cylindrical strands with a ring collar mill that has a variable slip between ring matrix and press roller, and shaping to form said spherical granulated material, wherein said ring collar mill has press channels with a length-to-diameter ratio of 1:1 to 10:1 and a roller gap between ring matrix and press roller of 0.05 to 2 mm, wherein said powdered solids are selected from the group consisting of rubber carbon blacks, pigment carbon blacks, and conductivity carbon blacks.
A method for the production of spherical granulated material from powdered solids, said method comprising adding a moistening agent and optionally an additive, to powdered solids in a mixer, uniformly moistening said solids, mixing and pressing said solids into cylindrical strands with a ring collar mill that has a variable slip between ring matrix and press roller, and shaping to form said spherical granulated material, wherein said ring collar mill has press channels with a length-to-diameter ratio of 1:1 to 10:1 and a roller gap between ring matrix and press roller of 0.05 to 2 mm, wherein said powdered solids are selected from the group consisting of rubber carbon blacks, pigment carbon blacks, and conductivity carbon blacks;
A spherical granulated material comprising powdered solids selected from the group consisting of rubber carbon blacks, pigment carbon blacks, and conductivity carbon blacks, produced by a method comprising adding a moistening agent and optionally an additive, to powdered solids in a mixer, uniformly moistening said solids, mixing and pressing said solids into cylindrical strands with a ring collar mill that has a variable slip between ring matrix and press roller, and shaping to form said spherical granulated material, wherein said ring collar mill has press channels with a length-to-diameter ratio of 1:1 to 10:1 and a roller gap between ring matrix and press roller of 0.05 to 2 mm, wherein said powdered solids are selected from the group consisting of rubber carbon blacks, pigment carbon blacks, and conductivity carbon blacks;
A spherical granulated material comprising powdered solids selected from the group consisting of rubber carbon blacks, pigment carbon blacks, and conductivity carbon blacks, produced by a method comprising adding a moistening agent and optionally an additive to powdered solids in a mixer, uniformly moistening said solids, mixing and pressing said solids into cylindrical strands with a ring collar mill that has a variable slip between ring matrix and press roller, and shaping to form said spherical granulated material, wherein said ring collar mill has press channels with a length-to-diameter ratio of 1:1 to 10:1 and a roller gap between ring matrix and press roller of 0.05 to 2 mm, wherein said powdered solids are selected from the group consisting of rubber carbon black, pigment carbon blacks, and conductivity carbon blacks.
Dependencies are inferred from the claim text.