REFRACTORY FILTER, POWDER COMPOSITION FOR PRODUCING REFRACTORY FILTER, USE OF REFRACTORY COMPOSITION FOR FORMING REFRACTORY FILTER AND METHOD OF PRODUCING REFRACTORY FILTER Russian patent published in 2025 - IPC B01D39/20 C04B35/10 

FIELD: metallurgy.

SUBSTANCE: group of inventions relates to means of filtration of molten steels. Refractory filter contains refractory material, where said refractory material contains: 60–89 wt.% of aluminium oxide, 8–30 wt.% of zirconium dioxide, and 3–20 wt.% of magnesium oxide and/or cerium oxide, wherein the material contains less than 12.5 wt.% of reactive aluminium oxide, calcined aluminium oxide or mixture thereof. Rest of the aluminium oxide is plate-like aluminium oxide.

EFFECT: reduced fragility and density of the filter.

28 cl, 1 dwg, 1 tbl, 4 ex