FIELD: metallurgy.
SUBSTANCE: invention relates to non-ferrous metallurgy on zinc plants operating by scheme of continuous leaching of burning products. Processing method of zinc ash includes primary hydraulic classification of zinc ash in the form of pulp of burning products on silty and sandy fractions. After primary classification it is implemented neutral leaching of silty fraction and it is implemented secondary classification of sandy fraction with receiving of silty and sandy fractions. Silty fraction of secondary classification is directed to stage of sour leaching. Sandy fraction of secondary classification is directed to grinding and treatment by waste electrolyte.
EFFECT: upgrading of neutral solution, directed to precipitated cleaning against admixtures and with this reduction of zinc dust at this stage.
1 dwg, 1 tbl
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