Riverside Refractories offers a number of standard and exclusive tap hole clays for use in blast furnaces of all sizes. Our options include:

• RSR 908 is a large furnace, high production clay designed for high pressure furnaces. Its high silicon nitride and silicon carbide content give it excellent resistance to slag and erosion. RSR 908 contains synthetic additions to enhance its casting capabilities, and provide health and environmental advantages not usually associated with petroleum bonded clays.
• RSR 961 is an alumina based taphole clay with silicon carbide and silicon nitride predominant. Other anti-oxidants are used to fortify the slag resistance of RSR 961. The combination of silicon carbide and silicon nitride should be representative of clays for blast furnaces producing over 10,000 tons per day.
• RSR 1133 is an anhydrous tap hole closure materials for use in small- to medium-sized furnaces, this product contains no coal tar products.
• RSR 1170R-AM is an anhydrous blast furnace tap hole closure materials designed for high production furnaces up to 6,000 tons per day. With a resin bond, RSR 1170-AM is ideal for both soaking bar and drill practice.
• RSR 1175-7 is a high alumina tap hole clay with silicon carbide and silicon nitride additions. Other antioxidants are used to fortify the slag resistance of RSR 1175-7.
• RSR 1650 is another anhydrous tap hole closure material for use on medium size blast furnaces with carbon and silicon carbide additions that greatly enhance its performance. It is recommended for furnaces that produce 3,500 to 4,500 tons per day.
• RSR 1657 is an anhydrous taphole closure material for use on medium size blast furnaces. This mix contains additives to enhance product performance. The maximum grain size is 5.6 mm, and is a blend of flint clays and bauxite.