COMPOSITION OF PERICLASE-SPINEL REFRACTORIES WITH ELASTIC STRUCTURE Russian patent published in 2025 - IPC C04B35/43 C04B35/626 

FIELD: chemistry.

SUBSTANCE: invention relates to refractory industry and can be used for production of periclase-spinel articles intended for lining of rotary kilns for burning cement clinker and other high-temperature units. Composition for making periclase-spinel refractories with an elastic structure, which includes periclase with mass fraction of MgO in range of 94–99% and granular aluminium-magnesium spinel with fraction of less than 5 mm with weight fraction Al₂O₃ in range of 55–70 wt.%, additionally contains conglomerates in the form of granular aluminium-magnesium spinel MgO⋅Al₂O₃ surrounded by crystallized periclase MgO with the following ratio of components of the mixture, wt.%: periclase is the base, aluminium-magnesium spinel: 5–15, conglomerates, content of which is determined by ratio of fraction of granular aluminium-magnesium spinel to their fraction, which is in range of 0.16–0.38. Weight fraction of Al₂O₃ in the conglomerates is determined by the ratio to the weight fraction of Al₂O₃ in the aluminium-magnesium spinel and is in range of 0.3–1.75. Additionally, the composition can contain a high-temperature additive in the form of baddeleyite or rutile concentrate in amount of 1–3% over 100%.

EFFECT: creation of dense high-temperature refractory with elastic structure, providing stable resistance of lining to high temperature gradient and resistance to action of aggressive components of working medium.

2 cl, 2 dwg, 1 tbl