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Process for treating aluminium slags

A technology for aluminum slag and reprocessing, which is applied in the field of processing aluminum slag generated when aluminum is obtained, and can solve problems such as difficulty in recycling aluminum components.

Inactive Publication Date: 2014-03-05
奥蒙德输送机有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

Especially when pouring out the liquefied raw melt (Rohschmelze), the aluminum salt slag is also liable to react directly with the ambient atmosphere, thereby making it difficult to recover aluminum components from the aluminum salt slag on the one hand and causing harmful gases release into the working environment of the furnace

Method used

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  • Process for treating aluminium slags
  • Process for treating aluminium slags

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Embodiment Construction

[0022] If the melting of the aluminum scrap in the furnace 10 produces a melt 40 of pure aluminum and an aluminum dross 41 suspended above the melt in the form of a so-called aluminum salt slag due to the addition of a corresponding salt mixture, the aluminum Before or during the pouring of the melt 40 from the furnace 10, the aluminum slag 41 is retained by means of the skimmer 11 and brought directly into the container 12, which can be suitably protected against the entry of oxygen in the air by means of a cover 13. way to seal.

[0023] for in figure 1 In the illustrated embodiment, the container 12 closed by means of the cap 13 is received by a forklift 14 and transported into an enclosure 15 which is likewise sealed against the ingress of ambient atmosphere. It is understood that a corresponding lock can be provided for the entry of the forklift truck 14 into the casing 15 . In the interior of the casing 15 there is a delivery station 17 coupled to the cooling conveyor ...

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Abstract

Process for treating aluminium slags (41) in the form of dross or aluminium salt slags obtained in the winning of aluminium, in which the aluminium slag (41) obtained in the melting process is brought with exclusion of the surrounding atmosphere onto a cooling conveyor (16) which is arranged in a housing (32) provided with extraction facilities (20, 30) and whose first section (18) adjoining the supply of the aluminium slag (41) is flushed with an inert gas and whose second section (29) serves for further cooling of the aluminium slag (41) with introduction of air, where the lengths of the first section (18) and the second section (29) of the cooling conveyor (16) are designed so that in the first section (18) the aluminium slag (41) is cooled to a temperature at which the aluminium slag (41); can no longer be chemically changed by exposure to atmospheric oxygen and in the second section (29) the slag is cooled to a temperature at which the cooled aluminium slag (41) can be processed further to recover the aluminium in the aluminium slag after leaving the cooling conveyor (16).

Description

technical field [0001] The invention relates to a method for processing aluminum dross (Aluminum schlacke) which is produced during the production of (Gewinnung) aluminum. Background technique [0002] During the primary production of aluminum, this aluminum dross is produced as so-called scum, in which the slag suspended on the surface of the melt is skimmed off the aluminum surface of the bath. The dross contains, in addition to metallic aluminum and aluminum oxide, various combustion products and residues from the refractory lining of the furnace. Depending on the proportion of aluminum contained in the dross, the dross is referred to as skimming (aluminum content >45%) or dross (aluminum content <45%). If the dross is conveyed to other processing systems in order to recover the aluminum components contained in the dross, the dross, after it has been stripped from the pond surface, is subjected to ongoing oxidation processes due to the acting ambient atmosphere, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B21/00
CPCC22B21/0069C22B7/04Y02P10/20C22B1/005C22B21/0007
Inventor M·莫里茨C·尼茨韦茨
Owner 奥蒙德输送机有限责任公司
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