Method for separating iron and precious metals from iron residue

Abstract

The invention discloses a method for separating iron and precious metals from an iron residue. The method comprises the following steps of smelting the iron residue of an iron separator, copper-containing carbon dust obtained by cracking a waste circuit board and a waste auto-exhaust catalyst to obtain a compound of black copper and iron and separating the compound of the black copper and the iron. According to the method for separating the iron and the precious metal from the iron residue, resourceful treatment can be carried out on multiple wastes in the technical field of automobile disassembling and recycling, so that, on the one hand, the iron and other precious metals in an iron separator residue can be removed, the purity of the recycled iron is ensured and losses of the previous metals are avoided; and on the other hand, the auto-exhaust catalyst can be subjected to resourceful treatment and the copper in the copper-containing carbon dust obtained by cracking the circuit board is comprehensively extracted, the recovery benefits are improved, the cost is reduced and the economic benefits are improved.

Description

technical field [0001] The invention relates to the technical field of automobile metal recovery, in particular to a method for separating iron and precious metals in iron slag. Background technique [0002] In the dismantling process of scrapped cars, there are many kinds of metals that need to be separated and recycled. Among them, the recycling of scrap iron is the most convenient. Generally, iron removers are used to magnetically separate the scrap iron from the metal scraps in transportation. But at the same time, It is also easy to entrain other precious metals. On the one hand, it causes the impurity of iron in the iron slag, which makes it difficult to recycle iron. On the other hand, it also causes the loss of precious metals. [0003] In the practice of the prior art, the iron slag in the iron remover is generally collected and directly made into an alloy, which limits the secondary utilization of iron and reduces economic benefits. Contents of the invention [...

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Problems solved by technology

[0002] In the dismantling process of scrapped cars, there are many kinds of metals that need to be separated and recycled. Among them, the recycling of scrap iron is the most convenient. Generally, iron removers are used to magnetically separate the scrap iron from the metal scraps in transportation. But at the same time, It is also easy to entrain other precious metals. On the one hand, it causes the impurity of iron in the iron slag, which makes it difficult to recycle iron. On the other hand, it also causes the loss of precious metals.

[0003] In the practice of the existing technology, the iron slag in the iron remover is generally collected and directly made into an alloy, which causes the limitation of the secondary utilization of iron and reduces the economic benefit

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