SHS Ferrosilicon Nitride NITRO-FESIL®TL as a New TAP-Hole Clay Refractory Component for Blast Furnaces1

The scientific and technical manufacturing firm Étalon developed and perfected industrial technology for manufacturing SHS ferrosilicon nitride NITRO-FESIL® TL, which is a composite consisting of silicon nitride, iron silicide, and free iron. On an industrial scale together with OAO MMK and ZAO Metallurgremont test tap-hole clays are provided containing ferrosilicon nitride NITRO-FESIL® TL. Taphole clays with the new component demonstrate higher corrosion and erosion resistance, and oxidation resistance, and also better sintering capacity. As a result of this reliable sealing of iron tap-holes, a smooth, more prolonged iron and slag flow regime with stable discharge parameters is provided. The clay is recommended for introduction.