METHOD FOR SUPPRESSING BACK OXIDATION OF CARBON-CONTAINING REFRACTORY PRODUCT, LINING STRUCTURE, AND CARBON-CONTAINING REFRACTORY PRODUCT

摘要

Provided is a method for suppressing rear face oxidation and a lining structure, with which high airtightness and a great effect of suppressing rear face oxidation are obtained. The method for suppressing rear face oxidation of a carbon-containing refractory according to the present invention includes forming a adherent layer on a rear face of a carbon-containing refractory by applying an alkali metal silicate aqueous solution to the rear face and solidifying the alkali metal silicate aqueous solution. The alkali metal silicate aqueous solution contains an alkali metal oxide R 2 O (R is an alkali metal element) and SiO 2 and has a molar ratio of SiO 2 to the alkali metal oxide of 2.3 or more. The rear face is located opposite a working face. The carbon-containing refractory is used at a high temperature of 400°C or more and contains 1 mass% or more of carbon or a carbon compound. The solid adherent layer of the alkali metal silicate is formed on the rear face of the carbon-containing refractory.