No abstract

Rapid destruction after I00 h testing in CO was noted after saturating the specimens with iron oxides. Specimens with batch additions of up to 5% iron oxides has no visible signs of damage during the entire period of 500 h'testing, since during preliminary firing the iron oxides had been bonded into inactive compounds or had entered the glass phase.On the basis of the test results it can be supposed that the destruction of the refractories under the action of CO at 500~ is a result of the occurrence of two mutually connected processes: the reduction of iron oxides situated in the pores and cracks, with volume changes; and decomposition of CO in the same cavities with the formation and acc~,mlation of sooty carbon and their combined splitting action. LITERATURE CITED I, 2. 3. 4. 5. 6. , 8. 9.