A method for recovering valuable metal from waste lithium battery

Abstract

The invention belongs to the technical field of lithium battery recovery, in particular to a method for recovering valuable metal from a waste lithium battery. The method comprises the following steps: transporting the lithium battery to a discharge battery filled with electrolyte through a hanging chain for discharge treatment; As the suspension chain moves to the waste liquid chamber, the lithium battery is perforated through the suspension equipment in the waste liquid chamber; conveying the lithium battery to the shower room for cleaning through a suspension chain; A suspension chain carries lithium batteries above that sorting equipment and releases the lithium batteries one by one so that the lithium battery enters the sorting equipment for crushing; The positive and negative electrode materials are transported to a baking furnace by a conveyor belt for baking; Transporting the calcined solid to a magnetic screening machine through a conveyor belt to screen out magnetic and non-magnetic substances; magnetic and non-magnetic materials are transported to an automatic particle sieving machine through a conveyor belt for sieving according to particle size grades. The invention realizes the classified recovery of valuable metals such as cobalt, copper and nickel good iron in lithium battery, and has the advantages of simple process and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of lithium battery recovery, in particular to a method for recovering valuable metals from waste lithium batteries. Background technique [0002] Lithium batteries mainly contain lithium cobalt oxide, lithium hexafluorophosphate, organic carbonate, carbon materials, copper, aluminum, nickel, manganese and other substances. Generally, the interior of the battery is composed of the main parts such as the positive electrode, the electrolyte, and the negative electrode, and is covered with a metal aluminum shell, and some of the outermost layers of the surface are also covered with a plastic shell. Lithium batteries mainly contain 5-23% cobalt, 0-10% nickel, 2-7% lithium, 5-11% copper, 3-10% aluminum, 3-15% organic matter, 1-7% plastic, etc. The production of lithium batteries consumes a large amount of non-ferrous metals, of which cobalt accounts for about 50% of the total domestic cobalt consumption. my coun...

AI Technical Summary

Problems solved by technology

The grade of cobalt ore in my country is low, and they are all recovered as by-products of copper and nickel mines. Due to the low grade and complicated production process in the production process, the metal recovery rate is low and the production cost is high.

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