Abstract:

Although the spinal addition to MgO-based refractors increases the heat shock resistance, the mechanical characteristics of MgO-spinal (M-S) refractors are quite low. M-S has seen significant improvements in mechanical properties in various proportions, in addition to SnO2. By determining the optimal chemical composition of the materials containing M-S-SnO, the relationships between the parameters that allow improvement in their mechanical properties and microbuilding changes have been detailed. The main parameters in the improvement of the mechanical characteristics of the M-S-SnO2 refractors are: a) when the microflakes formed in the structure come over the SnO2containing flakes (Mg2SnO4) more effectively than the spinel flakes, flakes, deviations or stops when they reach the pores by connecting one to another in the form of a network, b) in the type of breakdown: the spinel add-on tends to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break between flakes and the spinel add-on to break. Furthermore, the Rst parameters, which indicate the heat stress/shock parameters indicating the start and progress resistance of the break, and the R and R' parameters, which determine the improvement in the maximum temperature difference necessary for the progress of long breakings under severe heat voltage conditions, are calculated to identify the heat shock behavior of the materials. The heat stress/shock data of M-S-SnO2 refractors are significantly higher than M-S materials. This is also integrated with low strength loss that may occur in MS-SnO2 refractors at high temperatures in industrial use, high heat shock damage resistance and longer service life.

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