Repairing material for lining of tapping hole of converter as well as preparation method and use method of repairing material

• Main Authors: LIU JUNBAO, XING MINGMING, WANG CHANGBAO, TOYOTOSHI, LIU ZHONGJIAN
• Format: Patent
• Language: Chinese; English
• Published: 23.02.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; REFRACTORIES; SLAG; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF NATURAL STONE

The invention belongs to the field of refractory materials for converter tapping holes in the iron and steel industry, and particularly relates to a converter tapping hole lining repairing material and a preparation and use method thereof.The repairing material is prepared from waste magnesia carbon bricks, magnesia-calcium sand, alumina-magnesia spinel, ordinary pyroxene, montmorillonite, semi-coke and waste aluminum-zirconium carbon bricks as main materials, ZnO as an additive and alumina sol as a binding agent through a one-step method. And the material is used for repairing the lining of the tapping hole. The repairing material is high in high-temperature resistance, slag resistance, molten steel erosion resistance and scouring resistance, high in bonding strength with a matrix and good in thermal shock stability. According to the invention, on-line hot repair can be carried out on the lining of the tapping hole, the service life after one-time repair reaches more than 150 furnaces, the overall service li