Comprehensive recycling system for used lithium batteries and related technical equipment

The main purpose of the existing recycling technology for used lithium batteries is to recover the valuable metal elements in the batteries under the premise of taking into account the environmental and economic benefits. As a new type of energy storage with rapid development, lithium-ion batteries have eased the dependence on fossil fuels in the energy field, as well as the increasingly severe environmental pressure. However, a large number of used lithium-ion batteries have the dual attributes of hazardous waste and high value-added utilizable resources.

Therefore, it is extremely challenging and of special practical significance to realize the recycling and reuse of used lithium-ion batteries with increasingly diverse compositions through the innovation and combination of different technological means.

Brief introduction of the process

Reduction furnace cooling after reduction of black powder through the chain conveyor equipment into the ball mill / ball mill inlet bin, in the ball mill and ceramic ball contact, large particles of black powder is crushed agglomeration,Lithium battery recycling the final product size > 100 mesh, part of the black powder does not meet the requirements of the particle size after screening to return to the entrance of the ball mill, in the process of selecting the materials and equipment can not be considered when the contact of carbon steel, copper, zinc, the selection of 304 stainless steel and above.

Four systems of black powder reduction production line

1. Conveyor information system: the reduced black powder cooled by the reduction furnace is conveyed to the storage bin through a screw conveyor development and bucket elevator for spare parts. The storage silo is designed with different specifications according to the requirement of storage working time of the materials to ensure the stable supply of the materials to the enterprise. At the same time through all parts of the material turnover are used to elevator, reducing the company's footprint.

2. Grinding system: the material in the storage bin enters into the quantitative feeder through the rod material valve, and finally transported to the ball mill for grinding and processing, and at the same time, the material will be mixed with the corresponding solution, when the wet ball mill is running, the abrasive body will be in the centrifugal force and the surface of the liner plate and the inner wall of the cylinder body to produce a certain amount of friction, adhering to the liner surface of the inner wall of the cylinder body, along with the rotation of the cylinder body, was brought to a certain height, and then under the action of gravity free When falling, the grinding body is like a projectile,battery production line hitting the bottom of the material and crushing it. The cyclic movement of the mill body up and down is repeated. When the wet ball mill is running, the grinding body also produces sliding and rolling phenomenon, so that the grinding body, the liner and the material between the grinding action, so that the material fine grinding.

3.Dedusting system:When the material enters the silo, it will produce a lot of dust,labeling machine so it should be dedusted. When the dust collector works, the dusty gas enters the filtering room from the dust hopper (or the lower opening flange), and the coarse particles fall into the dust hopper (or the ash bank) directly. The dusty gas is filtered by the filter bag and the dust remains on the outer surface of the bag. The clean gas enters the clean room through the bag opening and is discharged into the atmosphere by the fan. Ensure the clean working environment.

4. Electrical control system: The electrical control system adopts the current advanced centralized control, DCS control or PLC control to ensure the continuity, efficiency and safety of the related equipment control.

Waste lithium batteries Brief introduction Electrical control system

25