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US 4,069,315 AGranted
Recovery of zinc from iron-making or steel-refining furnace dust
AssigneeAcieries Reunies de Burbach-Eich-Dudelange S.A. ARBED
InventorsArmand Wagner, Robert Pixius, Francois Schon
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Abstract
The zinc-containing dust from an iron-making (blast) furnace or a steel-refining (e.g. converter) furnace is recovered and extracted with water saturated with carbon dioxide to solubilize the zinc. The zinc solubilized in the CO.sub.2 -saturated water is then precipitated by the elimination of carbon dioxide therefrom.
Claims9
A process for recovery of zinc from the dust of a metallurgical plant which comprises the steps of:
- a. forming compacts of said dust;
- b. saturating water with carbon dioxide;
- to form a treating solution;
- c. treating the compacts of said dust with said water saturated with carbon dioxide for a period and at a temperature sufficient at a pressure of the order of 15 to 40 kg/cm.sup.2 to solubilize zinc from the dust compacts in the water of the treating solution;
- and
- d. precipitating the zinc from said solution by eliminating carbon dioxide therefrom.
3 more elements
Dependencies are inferred from the claim text.