Abstract

A method for recycling zinc (Zn), wherein the method comprises the following steps: providing a feed composition; adding the feed composition to a rotary oven; heating the added feed composition for producing a first liquid molten metal phase and a first supernatant dross; adding aluminum (Al) to the first liquid molten metal phase, wherein a second supernatant dross and a second liquid molten metal phase are formed; adding at least one flux to the second liquid molten metal phase, followed by at least one segregation step in which the second liquid molten metal phase is removed from the rotary oven; casting the second liquid molten metal phase, or adding the removed second liquid molten metal phase to a casting furnace; casting the second liquid molten metal phase from the casting furnace; wherein the method further comprises the steps of: removing the second supernatant dross from the rotary oven; subjecting the removed second supernatant dross to at least one crushing step and at least one sorting step for separating at least one zinc fraction and at least one zinc oxide fraction from the second supernatant dross; and using the at least one zinc fraction for contributing to provide the feed composition.

IPC Classes  ?

• C22B 19/30 - Obtaining zinc or zinc oxide from metallic residues or scraps
• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
• C22B 7/04 - Working-up slag

Abstract

A method for recycling zinc (Zn), wherein the method comprises the following steps: providing a feed composition; adding the feed composition to a rotary oven; heating the added feed composition for producing a first liquid molten metal phase and a first supernatant dross; adding aluminum (Al) to the first liquid molten metal phase, wherein a second supernatant dross and a second liquid molten metal phase are formed; adding at least one flux to the second liquid molten metal phase, followed by at least one segregation step in which the second liquid molten metal phase is removed from the rotary oven; casting the second liquid molten metal phase, or adding the removed second liquid molten metal phase to a casting furnace; casting the second liquid molten metal phase from the casting furnace; wherein the method further comprises the steps of: removing the second supernatant dross from the rotary oven; subjecting the removed second supernatant dross to at least one crushing step and at least one sorting step for separating at least one zinc fraction and at least one zinc oxide fraction from the second supernatant dross; and using the at least one zinc fraction for contributing to provide the feed composition.

IPC Classes  ?

• C22B 19/30 - Obtaining zinc or zinc oxide from metallic residues or scraps

Abstract

A method for recycling zinc (Zn), wherein the method comprises the following steps: providing a feed composition; adding the feed composition to a rotary oven; heating the added feed composition for producing a first liquid molten metal phase and a first supernatant dross; adding aluminum (Al) to the first liquid molten metal phase, wherein a second supernatant dross and a second liquid molten metal phase are formed; adding at least one flux to the second liquid molten metal phase, followed by at least one segregation step in which the second liquid molten metal phase is removed from the rotary oven; casting the second liquid molten metal phase, or adding the removed second liquid molten metal phase to a casting furnace; casting the second liquid molten metal phase from the casting furnace; wherein the method further comprises the steps of: removing the second supernatant dross from the rotary oven; subjecting the removed second supernatant dross to at least one crushing step and at least one sorting step for separating at least one zinc fraction and at least one zinc oxide fraction from the second supernatant dross; and using the at least one zinc fraction for contributing to provide the feed composition.

IPC Classes  ?

• C22B 19/30 - Obtaining zinc or zinc oxide from metallic residues or scraps