Method for recycling lithium batteries
AssigneeDuesenfeld GmbH
InventorsChristian HANISCH, Tobias ELWERT, Lisa BRÜCKNER
Life of this patent
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Abstract
A method for recycling lithium batteries containing the steps: (a) digesting comminuted material (10), which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid (12) at a digestion temperature (TA) of at least 100° C., in particular at least 140° C., so that waste gas (14) and a digestion material (16) are produced, (b) discharging the waste gas (14) and (c) wet chemical extraction of at least one metallic component of the digestion material (16).
Claims20
A method for recycling lithium batteries containing the steps:
- (a) digesting comminuted material, which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid, wherein digesting is performed such that waste gas and a digestion material are produced,
- (b) discharging the waste gas, and
- (c) performing wet chemical extraction of at least one metallic component of the digestion material,
- (d) wherein the comminuted material contains fluoride components and
- (e) wherein the digestion is conducted until a concentration of water-soluble fluoride in the digestion material is lower than 100 mg/kg.
A method for recycling lithium batteries containing the steps:
- (a) digesting comminuted material, which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid, so that waste gas and a digestion material are produced,
- (b) dosing concentrated sulphuric acid to the comminuted material with a dosage mass flow so that the mixture is created,
- (c) detecting the mixture temperature of the mixture. and
- (d) regulating the dosage mass flow so that the mixture temperature remains within the predetermined mixture temperature range.
A recycling installation for processing lithium batteries with
- (a) a comminution unit for comminuting the lithium batteries such that shredded material is obtained,
- (b) a deactivation unit for deactivating the batteries such that shredded material is obtained,
- (c) a reactor, especially a heated forced action mixer or rotary kiln, for digesting comminuted material, which contains components of electrodes of the lithium batteries, with concentrated sulphuric acid at a digestion temperature of at least 100° C.,
- (d) a sulphuric acid supply device for adding sulphuric acid to the comminuted material, and
- (e) a discharge device which is arranged to discharge waste gas out of the reactor.
Dependencies are inferred from the claim text.