REFRACTORY MATERIALS FOR THE JSC MMK'S DEGASSERS AND THE GENERAL TRENDS IN THEIR SERVICE RELIABILITY INCREASING

Abstract

The operational data are analyzed in the article for the bottom lining of recirculating degassers within oxygen-converter plant of JSC MMK. The main reasons for refractories fracture are established, such as the brick's slag and metal infiltration, the chemical erosion when interacting with slag, the thermal spalling of the bricks working surface because of the lining's temperature varying in course of lining's performance. To improve the refractories performance characteristics it is necessary to solve the problems of thermal and corrosion stability increasing for the incorporated materials. The main measures have been undertaken for the degasser's operational recurrence increasing, as well as for the slag's tailored composition selection in order to create the lining's skull during its operation. Ill. 3. Ref. 2.