METHOD FOR PROCESSING AND UTILIZING BYPASS DUSTS OBTAINED DURING THE PRODUCTION OF CEMENT

摘要

The invention relates to a method for processing and utilizing bypass dusts obtained during the production of cement. According to said method, a) the bypass dust is brought in contact with an aqueous phase and the two phases are mixed with each other to obtain a homogeneous slurry, water-soluble components of the bypass dust being dissolved in the aqueous phase, b) a solid-liquid separation is carried out to remove the solids contained in the slurry, brine remaining, c) heavy metals present in the brine are removed and calcium is precipitated as poorly soluble calcium salts Ca-CO3 to obtain a processed brine, and d) the processed brine is subjected to fractional crystallization.