Enlarged laboratory experiments of ferrous metallurgy dust sintering with calcium chloride

In this work, large-scale laboratory experiments were carried out on high-temperature sintering of clinker with CaCl2. New data were obtained on the extraction of zinc, lead and related impurities into the targeted products of high-temperature sintering under process scaling conditions. The optimal parameters for high-temperature sintering have been established: t =900 °C, τ = 60 minutes, CaCl2 consumption is 1.3 times higher than its consumption from the stoichiometric required amount (SRA). High quality zinc sublimates were obtained. The maximum extraction of zinc into sublimates was achieved - 98.2%. New data have been obtained on changes in the quantitative ratios of clinker ingredients under sintering conditions. It has been established that zinc in the form of chloride is concentrated in sublimations. The obtained results form the basis of the final stage of the chlorination technology for processing lead-containing zinc dust from ferrous metallurgy and were used in the developing of a general technology for the selective extraction of zinc and lead into marketable products.