| 摘要 |
1,064,039. Wet pelletization of carbon black. CABOT CORPORATION. June 2, 1964 [June 3, 1963], No. 22661/64. Heading B5A. In a wet pelletization of carbon black process, finely divided carbon black is fed to a weigh belt 23 via a cyclone collector 2, micropulverizer 4, agitator tank 12 and screw feed 16, the black is continuously weighed by passage over a platform 28 and the weighing is converted by means of a beam arm 39 to an electronic or pneumatic signal which operates a proportional controller 36 which in turn adjusts the rate of flow of liquid to the pelletizer 50 so that variations in the ratio of black to liquid entering the pelletizer are maintained within a prescribed limit, preferably Œ 1%, of a predetermined value for the ratio. Preferably also the controller 36 adjusts the rate of working of a motor 18, which drives the screw feed 16, and the carbon black is pre-moistened, e.g. 0À5 to 3% by weight of moisture, by injecting water through atomizing nozzles 6. The black is fed directly to the pelletizer 50 from the belt 23 through a widemouthed hopper 42 and the latter together with belt-housing 35 are provided with anti-vibration mounts 41 and 19 respectively. |
