REFRACTORY CONCRETE FOR CLADDING OF SILICIUM REFINING PLUNGE AND METHOD FOR CLADDING PRODUCTION USING THE SAME Russian patent published in 2005 - IPC

FIELD: non-iron metallurgy, in particular cladding of metal plunge.

SUBSTANCE: claimed refractory concrete contains (mass %): corundum mass 82-85; high-aluminous cement 4-5; electrical filter dust from silicium production 4-5; phosphoric acid 2-3; and water 3-4. Method for cladding manufacturing using the said concrete includes former installation into plunge; charging of refractory concrete into space between plunge internal wall and former, vibratory compaction, and two-step drying: at first at 20-25⁰C for 5-7 days and then by graduated heating and drying. Namely, at first cladding is heated up to 150⁰C with rate of 6-8⁰C/h and kept for 9-11 h; then cladding is heated up to 400⁰C with rate of 13-15⁰C/h and kept for 14-16 h; then cladding is heated up to 600⁰C with rate of 20-22⁰C/h and kept for 10-12 h. Cladding obtained by claimed method stands on silicium refining plunge up to 90 air thermal cycling.

EFFECT: cladding of improved strength.

2 cl, 4 tbl, 1 ex