the level of chemical purity after analysis.
The filter residue is dissolved with sulfuric acid and hydrogen peroxide, so that lithium iron
phosphate enters the solution in the form of Fe
2
(SO
4
)
3
and Li
2
SO
4
, and is separated from
carbon black and carbon coated on the surface of lithium iron phosphate. After filtration
and separation, the pH value of the filtrate is adjusted with NaOH and ammonia water. First,
iron is precipitated with Fe (OH)
3
, and the remaining solution is precipitated with saturated
Na
2
CO
3
solution at 90 ℃.
Since FePO
4
is slightly dissolved in nitric acid, the filter residue is dissolved with nitric acid
and hydrogen peroxide, which directly precipitates FePO
4
, separates impurities such as
carbon black from acid solution, leaches Fe (OH)
3
from filter residue respectively, and
precipitates Li
2
CO
3
with saturated Na
2
CO
3
solution at 90 ℃.
8.2 Recovery of anode materials
The recovery process of anode materials is relatively simple. After the separation of anode
plates, the purity of copper can be more than 99%, which can be used for further refining
electrolytic copper.
8.3 Recovery of diaphragm
The diaphragm material is mainly harmless, and has no recycling value.
8.4 List of recycling equipment
Automatic dismantling machine, pulverizes, wet gold pool, etc.
9 Transportation Requirements
The battery products should be transported after packaging and during the transportation
process, severe vibration, impact, or extrusion should be prevented to prevent sun and rain.
It can be transported using vehicles such as cars, trains, and ships.
Always check all applicable local, national, and international regulations before transporting
a Lithium Iron Phosphate battery.
Transporting an end-of-life, damaged, or recalled battery may, in certain cases, be specially
limited or prohibited.
The transport of the Li-Ion battery falls under hazard class UN3480, class 9. For transport
over water, air and land, the battery falls within packaging group PI965 Section I.
Use Class 9 Miscellaneous Dangerous Goods and UN Identification labels for transportation
of lithium-ion batteries which are assigned Class 9. Refer to relevant transportation
documents.
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