A pre-purification method and product before melting and casting of high-temperature electrolytic molten aluminum

Abstract

The invention provides a precleaning method before fusion casting of an aluminum electrolyte and a product thereof. The method comprises the following steps: after transporting an aluminum electrolyte to a precleaning station, sampling and determining temperature, composition and impurity content of the aluminum electrolyte in the refining ladle, and meanwhile, adding an alkali metal refining agent into the sampled aluminum electrolyte to perform preliminary treatment; and respectively treating the aluminum electrolyte after adding the alkali metal refining agent according to the sampling and determining results. The invention also provides an aluminum electrolyte prepared by the method. The sodium content in the aluminum electrolyte is lower than 15 ppm.

Description

technical field [0001] The invention relates to the technical field of aluminum processing, melting and casting production technology, in particular to a purification method using electrolytic aluminum liquid before melting and casting. Background technique [0002] The modern aluminum processing industry is characterized by highly automated equipment and large-scale production. Most of them use short-process processes to reduce process waste and increase yields. Advanced processing technologies are used to improve product performance and reduce production costs by various means. Large-scale aluminum companies such as Europe and the United States adopt large-scale intensive production, directly use electrolytic aluminum liquid to cast large-scale flat ingots, and produce and sell high value-added aluminum sheets, strips and foils. For example, the Hannibal Aluminum Strip Plant in the United States produces 680 tons of large slabs per day, all of which use aluminum liquid sen...

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Problems solved by technology

[0004] In the above-mentioned process method, the pretreatment of the main raw material electrolytic aluminum liquid into the furnace has not been paid enough attention. There are three reasons for the analysis: First, due to the long production cycle of the smelting furnace, the quality of the raw material into the furnace is not the first priority for the production workers. The first element; the second is that the history of technological development of aluminum processing and casting has resulted in uneven domestic professionals engaged in this industry, and is in the stage of technological replacement and innovation; the third is that electrolytic aluminum liquid has only been used as the main raw material for furnaces in recent years There are few studies on pre-purification methods

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