Treatment method of chlorine-containing zinc ash

The invention relates to a treatment method of chlorine-containing zinc ash, and belongs to the technical field of zinc smelting slag treatment.The technical scheme includes that the treatment method comprises the steps that 1, the chlorine-containing zinc ash is pulpified with water, diluted acid l...

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Bibliographic Details
Main Authors ZHANG MEI, JIN JIAQIANG, LUO HENG, LI ZONGXING, DONG TIEGUANG
Format Patent
LanguageChinese
English
Published 10.10.2023
Subjects
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
INORGANIC CHEMISTRY
METALLURGY
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Summary:The invention relates to a treatment method of chlorine-containing zinc ash, and belongs to the technical field of zinc smelting slag treatment.The technical scheme includes that the treatment method comprises the steps that 1, the chlorine-containing zinc ash is pulpified with water, diluted acid liquor containing Cu < 2 + > is added, arsenic hydride gas is inhibited from being separated out with Cu < 2 + >, the process and the pH value of end-point ore pulp are controlled, and zinc is leached; (2) after zinc leaching is finished, a neutralizer and an oxidizing agent are added for impurity removal; and (3) concentrating and crystallizing the impurity-removed filtrate in the step (2), controlling the specific gravity of a final crystallization solution, cooling the concentrated solution to room temperature, filtering and air-drying to produce a zinc sulfate heptahydrate product, and returning the crystallization mother liquor to the next group for concentrating and crystallizing. The method is short in proces
Bibliography:Application Number: CN202310917017