REFRACTORY MATERIALS AND THEIR USE Russian patent published in 2019 - IPC C04B35/20 C04B35/43 C04B35/66 

FIELD: technological processes.

SUBSTANCE: invention relates to refractory materials for lining from firing side of industrial furnaces for melting of non-ferrous metals. Dry mineral charge contains components (wt%): coarse-grained olivine raw material of fraction 1 mm and more with forsterite content of more than 70 wt% as main component 15–74, powder of magnesia (MgO-flour) of fraction less than 1 mm 25–55 and at least one heat-resistant carbon reagent of fraction less than 1 mm 1–30, acting in process of melting (in situ) as reducing agent on melts of oxide of nonferrous metal and/or melt of oxide iron-non-ferrous metal and converts them into molten metal of non-ferrous metal. High-quality olivine and magnesia raw materials with Fe₂O₃ impurities content are used in charge composition not more than 10 wt%. Fine-powdered powdered silicic acid is added to charge, followed by water blanking or synthetic polymer binder.

EFFECT: production of refractory products from charge for refractory masonry or monolithic lining, long-term resistant to fayalite slags, sulphide melts (matte), sulphates and melts of non-ferrous metals.

18 cl, 5 dwg