SPINEL REFRACTORY MATERIAL Russian patent published in 2005 - IPC

FIELD: metallurgy; production of spinel refractory material for lining smelting furnaces.

SUBSTANCE: the invention is pertaining to the field of metallurgy, in particular, for production of spinel refractory material used for lining smelting furnaces, for example, for smelting of aluminum alloys. The mass for production a spinel refractory material consists of (in mass %): an under-earth - 3-5, a sintering additive in the form of a mix of boric acid and sodium tripolyphosphate taken in the ratio from 1:9 up to 9:1 - 4.5-6.5, a temporary binder - 2-3 and a melted aluminum-magnesia spinel - the rest. It is preferable to use aluminum-magnesia spinel containing fractions of <0063 mm within the limits of 30-40 mass %. The sintering additive and the fine grain composition of aluminum-magnesia spinel ensure a good sintering of the refractory mass and production of a dense refractory material with a low accessible porosity and a high mechanical strength. The refractory material is inertial to a melt of metal and is not impregnated with it, that ensures parallax purity of the smelted metal and eliminates metal loss with lining.

EFFECT: the invention ensures production of a dense refractory material with a low accessible porosity, a high mechanical strength, a good mass sintering, a parallax purity of the smelted metal excluding the metal loss with lining.

2 cl, 2 tbl