COMPOSITE STARTING MIXTURE FOR FILLING THE STEEL-TEEMING LADLE DISCHARGE CHANNEL Russian patent published in 2019 - IPC B22D41/46 

FIELD: metallurgy.

SUBSTANCE: starting mixture contains 30 wt% of chromium-containing part containing fractioned wastes of chromium-containing refractory or their mixture and lubricating and enveloping material, and 70 wt% of silica-containing part, in which silicon dioxide is mainly contained in a chemical compound of aluminosilicate system SiO₂-Al₂O₃ and in chemical composition of magnesium silicate system SiO₂-MgO. Ingredients of the first part of the mixture are taken in the following ratio, wt%: fractioned wastes of chromium-containing refractory materials (25–35), lubricating and enveloping material (2–5), chromite concentrate (balance up to 100 %). Ingredients of the second part of the mixture are taken in the following ratio, wt%: chemical compound of aluminosilicate system SiO₂-Al₂O₃ (30–40), a chemical compound of magnesium silicate system SiO₂-MgO (balance up to 100 %). Coating and lubricating material are represented by talc with grain size limit of 0.063 mm.

EFFECT: providing mobility of slag phase, reducing amount of slag, reducing concentrations of aggressive to lining components in slag.

4 cl, 1 dwg, 1 tbl, 3 ex