A waste lithium battery crushing system and its process

Abstract

The invention proposes a waste lithium battery crushing system and a process thereof. The crushing system includes a battery crusher, a low-temperature baking oven, a first hammer mill, a first linear screen, a magnetic separation mechanism, a second hammer mill, Cyclone dust collector, trommel screen, second linear screen, gravity sorting system, a first negative pressure adsorption system, a first hammer mill, a first linear screen, a first negative pressure adsorption system, a first hammer mill, a first linear screen, The magnetic separation mechanism, the second hammer mill, the trommel screen and the gravity separation system are provided with a second negative pressure adsorption system, the first negative pressure adsorption system is connected with an exhaust gas treatment system, the second negative pressure adsorption system and the cyclone collector A dust collection treatment system is connected above the dust collector. The invention integrates the crushing of waste lithium batteries, the recovery and disposal of electrolyte, the baking of crushed materials, the grinding of crushed materials, the screening of magnetic shells, the recovery of positive and negative electrode powders, the recovery of diaphragm paper, the recovery of copper and aluminum foil, and the dust collection treatment. , to achieve the purpose of resource recycling.

Description

technical field [0001] The invention relates to the technical field of waste battery crushing and processing devices, in particular to a waste lithium battery crushing system and a process thereof. Background technique [0002] Waste batteries are used and discarded batteries. Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, separators, binders, conductive agents, etc. Among them, the positive electrode materials mainly include lithium cobalt oxide, lithium manganate, lithium nickelate, lithium iron phosphate and ternary materials. Lithium cobalt oxide, as a typical representative of cathode materials, is widely used in daily life because of its high capacity and strong cycle stability, and cobalt and lithium in lithium cobalt oxide have high recycling value as rare metal elements. Batteries contain a lot of precious metals and rare elements, which are not only harmful to the soil and water environment, but also have r...

AI Technical Summary

Problems solved by technology

However, because the broken battery material will be mixed with electrolyte inside, the broken battery material will adhere to the inner wall of the device, causing the battery broken material inside the device to be unable to be discharged. Over time, the adhered battery broken material will cause damage to the discharge port. A certain blockage, resulting in unsmooth discharge

[0006] 2) The current waste battery crushing device does not crush waste batteries well, and the crushed materials still contain a large amount of block solids, which affects the overall recovery of waste batteries

[0007] 3) After the waste lithium battery is physically crushed, the crushed material contains electrolyte. Before recycling the valuable materials in the crushed material, the electrolyte in the crushed material needs to be removed, but there is no special one in the market currently. A device for removing the electrolyte in the crushed materials of waste lithium batteries

[0008] 4) When waste lithium batteries are recycled, a large amount of exhaust gas and dust will be generated, which not only increases the pollution of the environment, but also is not conducive to the health of the surrounding people

After the current gravity separator has been in operation for a long time, some broken materials of waste lithium batteries will stick to the screen of the separator, and the cleaning of the screen of the separator needs to be done manually after the equipment is shut down, which is very inconvenient and undoubtedly increases the labor force and is time-consuming. strenuous

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