A METHOD AND APPARATUS FOR APPLYING A TREATING LIQUID TO A POROUS BODY

摘要

A method of applying a treating liquid to a porous body (11), in particular a pre-baked carbon component of an aluminium production cell, such as an anode block, a cathode block or a sidewall. In this method, first the body (11) to be treated is inserted, with its part to be treated up, in the treating chamber (12). At least one sealing member (13) is then applied to the inserted body (11) in such a manner as to isolate the chamber into two parts: an upper part (14) of the treating chamber around the part of the body to be treated, isolated from a lower part (15) of the treating chamber around a bottom part of the body which is not to be treated. Next, the upper part (14) of the treating chamber is filled with a treating liquid (10) to cover the part of the body to be treated, and a vacuum is applied to intake an amount of the treating liquid into pores in the part of the body to be treated so that the part of the body to be treated is impregnated with the treating liquid. After completion of the impregnation, the sealing member or members (13) is/are released to free the body, and the treated body (11) is removed from the treating chamber.