Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Halogenous component
Patent
1986-01-21
1987-06-30
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Halogenous component
423244, 423245, 423460, C01B 700, B01J 800, C09C 156
Patent
active
046769609
ABSTRACT:
The solid, liquid and gaseous waste products which arise during the manufature of carbon electrodes are concentrated.
First, the solid electrode waste is mixed with the carbon-rich dusts from crushing operations, and with lime or lime and gypsum (from a wet scrubbing operation). By means of grinding and screening the mixture is converted to a suitable range of fine particulate sizes, then fed continuously as adsorbent material through a dry scrubbing unit through which is passed the gaseous waste that also contains fractions of fluid waste. The thus charged adsorbent is combusted together with oily waste in a low temperature fluidized bed boiler. The resultant ash and slag which contain the pollutants as non-hazardous calcium sulfate or calcium fluoride are transported to a dumping site. The adsorbent for dry scrubbing units for purifying waste gases from units manufacturing carbon electrodes comprises fine-grained, ground electrode residue, carbon-rich dusts from crushing operations and lime or lime and gypsum.
REFERENCES:
patent: 3544263 (1970-12-01), Ninomiya et al.
patent: 4372927 (1983-02-01), McCullough
patent: 4427642 (1984-01-01), Arashi et al.
Engelsman Robert
Fischer Werner K.
Keller Felix
Kooijman Ary A.
Heller Gregory A.
Swiss Aluminium Ltd.
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