A method for comprehensive recovery of valuable metals from lithium-ion battery electrode waste

A lithium-ion battery and valuable metal technology, applied in the direction of improving process efficiency, can solve the problems of low recovery rate of valuable metals, uneven quality of lithium salts, long treatment process, etc., to improve sedimentation and filtration performance , low treatment cost, no three wastes discharge effect

Active Publication Date: 2020-06-02
CHANGSHA RES INST OF MINING & METALLURGY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of extraction technology, each enterprise mainly adopts wet treatment process, that is, the nickel-cobalt-manganese-lithium waste is firstly treated with acid to transfer the valuable metals into the solution, and then the nickel-cobalt-manganese-lithium is separated and recovered from the solution at a later stage; currently, for The separation of nickel-cobalt-manganese-lithium in a complex solution system mainly includes methods such as preferential precipitation for lithium separation and preferential extraction for nickel-cobalt-manganese separation. Whether lithium is separated first or nickel-cobalt-manganese is separated first, there are long processing procedures and low recovery rates of valuable metals. No breakthroughs have been made in problems such as low quality, uneven quality of lithium salts, large amounts of high-sodium wastewater, and unenvironmental processes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for comprehensive recovery of valuable metals from lithium-ion battery electrode waste
  • A method for comprehensive recovery of valuable metals from lithium-ion battery electrode waste
  • A method for comprehensive recovery of valuable metals from lithium-ion battery electrode waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The waste ternary battery positive electrode waste provided by a battery factory in Hunan (positive active waste obtained after safe discharge, physical dismantling, separation of aluminum foil, separation of conductive agent and binder) was obtained by sulfuric acid leaching-impurity removal treatment containing nickel and cobalt The purification solution of manganese and lithium (nickel, cobalt and manganese are divalent), its composition is as shown in table 1.

[0034] The method for comprehensively recovering valuable metals from the above-mentioned purification solution containing nickel, cobalt, manganese and lithium comprises the following steps:

[0035] (1) In the purifying solution containing nickel-cobalt-manganese-lithium, add sodium sulfite as reducing agent, and the amount of reducing agent added is 0.75 times of manganese content in the purifying solution containing nickel-cobalt-manganese-lithium, with 40%NaOH solution as precipitating agent, to containi...

Embodiment 2

[0043] The waste ternary battery positive electrode waste provided by a battery factory in Changsha (positive active waste obtained after safe discharge, physical dismantling, separation of aluminum foil, separation of conductive agent and binder), after hydrochloric acid leaching-impurity removal treatment to obtain nickel-cobalt The purification solution of manganese lithium (nickel cobalt manganese is divalent), its composition is as shown in table 2 below;

[0044] The method for comprehensively recovering valuable metals from the above-mentioned purification solution containing nickel, cobalt, manganese and lithium comprises the following steps:

[0045] (1) for the purification solution containing nickel, cobalt, manganese and lithium, add 80% hydrazine hydrate as a reducing agent, and the amount of reducing agent added is 1.0 times of the manganese content in the purification solution containing nickel, cobalt, manganese and lithium, and 20% LiOH solution is used as a pr...

Embodiment 3

[0054] Waste lithium cobalt oxide and lithium manganate battery positive electrode waste provided by a battery factory in Jiangxi (positive electrode active waste obtained after safe discharge, physical disassembly, separation of aluminum foil, separation of conductive agent and binder), sulfuric acid leaching-removal of impurities Process the purification solution containing nickel-cobalt-manganese-lithium (nickel-cobalt-manganese is divalent), and its composition is as shown in Table 3 below;

[0055] The method for comprehensively recovering valuable metals from the above-mentioned purification solution containing nickel, cobalt, manganese and lithium comprises the following steps:

[0056] (1) Add 100mL of dilute LiOH solution into the reaction kettle, turn on heating and stirring;

[0057] (2) After the underflow in the reactor was warmed up to 80°C, the purified solution containing nickel-cobalt-manganese-lithium and the concentrated mother liquor produced in step (4) in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for comprehensively recycling valuable metals from lithium ion battery electrode waste. The method comprises the following steps: (1) performing acid leaching-purification treatment on the lithium ion battery electrode waste to obtain a purified solution containing nickel, cobalt, manganese and lithium; (2) mixing the purified solution containing nickel, cobalt, manganese and lithium, a precipitating agent and a reducing agent, selectively precipitating and separating nickel, cobalt and manganese to obtain nickel-cobalt-manganese precipitate residue and a lithium-enriched solution; (3) treating the lithium-enriched solution obtained in the step (2) by adopting a bipolar membrane electrodialysis method to obtain a lithium hydroxide solution and a dilute acidsolution; (4) evaporating and concentrating the lithium hydroxide solution obtained in the step (3) to obtain concentrated mother liquor and a battery grade lithium hydroxide monohydrate product. Themethod has the advantages of simple process flow, low treatment cost and no three waste discharge, and the recycling rates of the nickel, cobalt, manganese and lithium in the mixed solution containing nickel, cobalt, manganese and lithium are all greater than 99 percent.

Description

technical field [0001] The invention belongs to the field of recovery of valuable metals, in particular to a method for recovery of valuable metals from lithium batteries. Background technique [0002] The vigorous development of the new energy automobile industry has drawn attention to energy metals. In order to solve the bottleneck problem of resource protection in the lithium battery industry, major lithium battery companies are actively expanding the source of raw materials for nickel, cobalt, manganese and lithium. Cobalt and lithium have become key resource issues that need to be resolved urgently in the industry due to factors such as the shortage of domestic primary resources and foreign restrictions on mining and export. [0003] End-of-life lithium-ion batteries are rich in metals such as nickel, cobalt, manganese, and lithium, and have become an important source of energy-short metals. In the past three years, extraction and separation technologies such as fire ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00C22B26/12
CPCC22B7/007C22B23/043C22B23/0461C22B26/12C22B47/00Y02P10/20
Inventor吴江华李贺宁顺明万洪强邢学永田建利缪亚兵黄彦强
OwnerCHANGSHA RES INST OF MINING & METALLURGY