Process for treating gaseous emissions generated during...

Details Process for treating gaseous emissions generated during... Process for treating gaseous emissions generated during...

2005-01-25

2005-01-25

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Halogenous component

C423S245100, C423S245300, C423S210000, C095S131000, C588S253000, C588S253000

Reexamination Certificate

active

06846472

ABSTRACT:
A process for treating gaseous emissions generated during the production of carbon anodes in the aluminum industry. In this process, first gaseous emissions generated during green anode preparation are collected and preheated by direct contact with a stream of combustion gases. Second gaseous emissions generated during anode baking are also collected and mixed with the first gaseous emissions to form a gaseous emission mixture. Alumina powder is then injected into the so obtained mixture and the resulting mixture with the alumina injected therein is processed into a dry scrubber that is equipped with a bag filter and is operating at temperatures well above the saturation temperature of tars, so as to obtain a gaseous mixture partially purified and free of fluorides and particulates. The so obtained partially purified gaseous mixture is then processed into an oxidation furnace in order to destroy all the organic compounds contained therein.

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patent: 6183707 (2001-02-01), Gosselin et al.

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