PROCESS AND PLANT FOR THE RECOVERY OF IRON, ZINC AND LEAD CONTAINED IN DUST AND SLUDGE FROM BLAST FURNACES, AS WELL AS CONVERTERS AND ELECTRIC STEEL FURNACES

摘要

This invention provides a process for the treatment of dust or sludge from a blast furnace, or from an electric furnace or converter of a steel works, to remove zinc therefrom, comprising continuously introducing the dust or sludge in a dried and crushed form into an iron bath, continuously introducing carbon- bearing material into the bath at the same time in an amount sufficient to maintain therein an amount of carbon which is greater than 1%, and adding to the bath slag-forming agent to form a slag of basic nature. A suitable installation for the purpose comprises a metallurgical container (10), a lance (23) provided with a refractory coating (26) and whose head (25) is disposed adjacent the bottom of the container and whose inlet is connected to a cell- type metering supply means (20) disposed outside of the container, and a discharge conduit (14) which extends within the container and which is connected to a dust collecting means (30). IMAGE