Manufacture of briquettes from ball bearing steel pulverized metal waste without prior cleaning by cold pressing

The article presents a study on the production of briquettes from bearing steel machining waste for use in secondary steelmaking. Cold compaction of pulverized SHH15 steel chips was carried out using a laboratory RP-50 hydraulic press with a maximum capacity of 500 kN. Through a series of experiments, the optimal composition of the briquetting mixture was established as 85% steel waste, 10% bentonite clay, and 5% liquid glass. The pressing parameters were optimized to improve the mechanical integrity of the briquettes. Thermal drying at 80 °C for 90 minutes, combined with a pressing force of 60 kN, resulted in the formation of structurally uniform briquettes with high compressive strength. These results demonstrate the effectiveness of the proposed method for converting uncleaned steel waste into a reusable metallurgical feedstock. Ключевые слова : брикетирование, отходы подшипниковой стали, холодное прессование, бентонитовое связующее, жидкое стекло.