sludge processing system of a smoke washing system, body, apparatus for cleaning particles in an aqueous paste, method for producing metallic iron filler material for a steel converter or electric arc furnace, method for producing steel, method for producing raw material particles to produce pig iron, raw material for a pig iron production process and steel converter smoke residue processing system

摘要

Systems and methods for processing sludge from a fume scrubbing system that scrubs fumes from a steelmaking converter in a manner that separates/isolates a significant portion of the metallic iron particles in the sludge and prepares these particles for convenient handling. In an exemplary system, the system includes separating equipment that isolates metallic iron particles in the sludge and forming equipment that forms the isolated particles into briquettes that have relatively high mechanical resistance that allow the briquettes to maintain their integrity during handling and storage. The high-metallic-iron-content briquettes can be recycled in the steelmaking process, for example, as charging material for a basic oxygen converter or an electric arc furnace. Water used in the system can be recycled and reused within the system, thereby making the system environmentally friendly.Systems and methods for making pellet feedstock and sinter feedstock for making pig iron, and feedstocks made thereby. Nonmetallic particulates are isolated from steelmaking converter exhaust fume residue and are incorporated into the pellet and/or sinter feedstocks. In one embodiment, the nonmetallic particulates are disaggregated from metallic particles in the residue using an acoustic cavitation duct. In one example of making pellet feedstock, the nonmetallic particulates are mixed with iron ore, limestone, coal, and bentonite to form a mixture that is pelletized into green pellets, which are then cooked to form the pellet feedstock. In one example of making sinter feedstock, the nonmetallic particulates are first micro-pelletized and then mixed with iron ore, limestone, and coal to form a mixture that is then cooked and crushed to form the sinter feedstock.