New Developments at the Kombinat Magnezit Aimed at Extending the Service Life of Thermal Power Units

摘要

Currently, the refractory industry in Russia is undergoing a reorganization. Heat resistance of refractory bricks and components used for the lining of industrial units has reached a sufficient level at an optimum cost-to-performance ratio. Further increase in durability of the lining will incur additional costs because of the necessity to use pure and, consequently, more expensive precursor materials whose thermal stability may not necessarily be a match to their cost. Undoubtedly, there is a margin for improving the quality of refractories by imposing more stringent requirements on the fabrication technology conditions; still, the actual reserve for increasing durability of the lining for thermal power units lies in the field of metallurgy and materials science. Regression analysis data (available from the Ispat-Karmet Joint-Stock Co.. Temitau, Kazakhstan) showed that the durability of the lining of a 250-ton converter was controlled by factors such as the quality of refractory materials and operating conditions. Of the total of factors involved, metallurgical factors account for 77 percent. and refractory factors, for 23 percent.