Аңдатпа
The paper studies the effect of temperature and NH4Cl consumption on lead extraction from dust of various compositions with determination of optimal sintering parameters. New data on metal distribution between sintering products of dust No. 1 and No. 2 from processing ferrous scrap metal in electric arc furnaces and from smelting iron ore raw materials in an electric steelmaking furnace, respectively, are obtained. Comprehensive analytical studies of intermediate and final products are performed using XRF spectroscopy, XRD analysis and electron microscopy. This ensures quality control of the obtained products during the implementation of the technological process of dust sintering together with ammonium chloride. Based on the experiments, a high distribution of Pb from dust No. 1 and No. 2 into sublimates was achieved – 98% and 97.6%, respectively, with its residual content in clinker – 2.0% and 2.4%. At the same time, low zinc extraction from dust No. 1 and No. 2 into sublimates is shown – 0.04% and 0.06%, respectively. The technology proposed in the work ensures environmental safety of the dust processing and the production of valuable technogenic raw materials – lead sublimates and zinc-containing clinker, which can be used as additional raw materials for the production of commercial lead and zinc. The research was conducted within the framework of grant funding from the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan for 2023-2025 in the priority area “Rational use of water resources, flora and fauna, ecology” of the project AR19679572 “Development of a new technology for the utilization of zinc dust from steelmaking industries to obtain marketable products”.