PERICLASE-SPINEL REFRACTORY Russian patent published in 2017 - IPC C04B35/43 

FIELD: heating system.

SUBSTANCE: invention relates to periclase-spinel refractories used in the lining of high-temperature thermal aggregates, for example in rotary kilns for cement clinker burning, in lime kilns for lime roasting, and other. Periclase-spinel refractory, including magnesia-pedalferic spinel, periclase and silicates, contains: periclase - not less than 60% by weight, silicates - not more than 3.5% by weight and magnesia-pedalferic spinel containing oxides of MgO, FeO (in terms of Fe₂O₃), Al₂O₃, Fe₂O₃ and TiO₂, the amount of which in the refractory is determined by the ratio , which is in range of 2-19, with the spinel having the ratio not exceeding 40, in the basis of the refractory it is represented by oxides of MgO, FeO, Al₂O₃, Fe₂O₃, and in the matrix part of the refractory by oxides of MgO, Fe₂O₃, Al₂O₃ and TiO₂. Magnesia-pedalferic spinel in the base of the refractory may further contain: ZrO₂, TiO₂ and have a ratio of in the range of 0.5-6.0.

EFFECT: production of refractory with reduced gas permeability and high resistance to corrosive and thermal stresses.

3 cl, 1 dwg, 7 ex, 1 tbl