C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
202/6
C10B 45/02 (2006.01) B01F 7/18 (2006.01) C10L 5/02 (2006.01)
Patent
CA 1231668
ABSTRACT A method for preparing a material mixture for hot briquetting by pyrolytic decomposition of bituminous coal in a mixture with from 2 to 5 times by volume fine grained, thermally widely stable substance which do not bake below 650 °C and do not, or substantially do not soften at temperatures between 450 and 530 °C, comprising rotationally mixing an kneading the material in two perpendicular directions, first in an upper kneading zone then in a lower distributing zone. The substan- tially stable material when mixed with the bituminous coal predry and/or preheat the bituminous coal to its softening point due to a higher temperature for the stable substance before it is mixed with the bituminous coal. The mixture in the upper kneading zone is first rotationally kneaded and mixed in a direction which is parallel to a plane containing the axes of rolls in a double roll press to be used for the briquetting operation. In the lower distributing zone which follows the kneading zone, mixing and kneading is continued in a direction which is substantailly perpendicular to the mixing direction in the upper kneading zone. The mixture is permitted to fall by gravity in the reactor at a speed less than 3 cm per second. The material is distributed from the distributing zone uniformly over the axial width of the rolls and the double roll press.
462573
Beckmann Franz
Birscheidt Henri
Dungs Horst
Firma Carl Still G.m.b.h. & Co. Kg
Macrae & Co.
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