A kind of method that waste lithium cell prepares battery-level lithium carbonate
Technical field
The present invention relates to a kind of methods that waste lithium cell prepares battery-level lithium carbonate, belong at lithium battery material waste
Manage technical field.
Background technology
With the increasingly extensive application of lithium battery, the processing of discarded lithium battery is also increasingly subject to the concern of people, wherein containing
There are many valuable metals, recycling not only to have huge social benefit, also there is huge economic benefit.And with lithium from
The demand of the fast development of sub- battery, battery-level lithium carbonate also increasingly increases, and lithium is recycled from lithium battery waste material and is prepared
Battery-level lithium carbonate, that is, improve the utility value of inner battery waste, and reduces the pollution that raw ore mining belt is come.
Invention content
In view of this, the present invention provides a kind of method that waste lithium cell prepares battery-level lithium carbonate, flow is short, technique
Simply, and the separation and recycling of full constituent can be realized, the rate of recovery is high, and finally obtained product purity is high, added value of product
Greatly.
The present invention solves above-mentioned technical problem by following technological means:
A kind of method that waste lithium cell prepares battery-level lithium carbonate, is following steps:
1) it pre-processes, recycling old and useless battery material back or waste battery is obtained by dismantling after-broken-sieving
Battery particle;
2) by battery particle reducing leaching, according to solid-to-liquid ratio 1:3-10 addition bottom waters, addition acid for adjusting pH to 0.5-2.0,
50-90 DEG C of reaction temperature, reaction time 2-6 hour, while reducing agent is added, the mole that reducing agent is added is that trivalent metal rubs
0.5-4 times of that amount, reaction, which finishes, to be filtered, and the first filtrate and the first filter residue are obtained;
3) iron aluminium is removed, alkali, which is added, in the first filtrate adjusts back pH to 4-5.5, and iron therein, aluminium, chromium ion is made to precipitate so that
In solution then the second filtrate and the second filter residue is obtained by filtration less than 10mg/L in the content of iron, aluminium, chromium;
4) it cleans, zinc powder is added in the second filtrate, and being 50-70 DEG C in temperature reacts 2-3 hours, and filtering obtains third filtrate
With third filter residue, third filtrate obtains the raffinate containing nickel cobalt magnesium lithium after the extraction of P204 extractants is except iron, zinc, copper, manganese,
After extracting nickel cobalt magnesium with P507 extractants, obtained raffinate is the solution containing lithium, sodium;
5) deep impurity-removing will contain lithium raffinate and sodium hydroxide is added at 60-80 DEG C, and adjust pH to the 9-11 of solution,
It is reacted 2-3 hours under the conditions of this, filters, obtain the 4th filtrate and the 4th filter residue;
6) battery-level lithium carbonate is prepared, complexing agent is added in the 4th filtrate, ammonium hydrogen carbonate is then added, at 30-60 DEG C
Lower stirring is added, while it is 0.5-1 micron battery-level lithium carbonates as crystal seed that granularity, which is added, and addition is every liter of solution 5-10g,
It then heats to temperature to react 1-2 hours for 90-95 DEG C, filtration washing, drying sieving is packaged to be battery-level lithium carbonate.
100-200 mesh sieve is crossed in the step (1) when sieving.
The reducing agent being added in the step (2) is sulfur dioxide, hydrogen peroxide, sodium sulfite, iron powder or zinc powder.
In step (3) after readjustment pH to 4-5.5, it is 85-95 DEG C to be warming up to temperature, then passes to air and makes ferrous ion
It is fully oxidized to ferric iron, then proceedes to reaction 1-2 hours.
The granularity for the zinc powder being added in the step (4) is 100-150 mesh, and the molal quantity that zinc powder is added is in the second filtrate
1.1-1.2 times of nickel cobalt copper-manganese molal quantity, maintain be added zinc powder process pH be 3.5-4, P204 extractants extraction except iron, zinc,
Copper, manganese process extract for 8-10 stage countercurrents, and the volume flow ratio of P204 extractants and third filtrate is 1:3-5, having after extraction
Machine mutually passes through 5-6 stage countercurrents and washs, and cleaning solution return is extracted after being mixed with third filtrate, and cleaning solution uses 0.15-
The volume flow ratio of the sulfuric acid solution of 0.25mol/L, organic phase and cleaning solution after extraction is 1:0.1-0.15, P507 extractant
It when extracting the raffinate containing nickel cobalt magnesium lithium, is extracted using 8-10 stage countercurrents, P507 extractants and the raffinate containing nickel cobalt magnesium lithium
The volume flow ratio of liquid is 1:1-2, the organic phase after extraction are washed by 2-3 stage countercurrents, and cleaning solution returns and contains nickel cobalt magnesium
Extracted after the raffinate mixing of lithium, cleaning solution uses the sulfuric acid solution of 0.1-0.15mol/L, organic phase after extraction with wash
The volume flow ratio for washing liquid is 1:0.2-0.25.
It is filtered again after flocculant is added after completion of the reaction in the step (5), the amount that flocculant is added is per ton molten
30-40g flocculants, flocculant PAM is added in liquid.
Step (6) complexing agent is ammonium hydroxide, citric acid, tartaric acid, sulfosalicylic acid or EDTA, after complexing agent is added
A concentration of 0.1-0.2mol/L of complexing agent, the molal quantity of the ammonium hydrogen carbonate of addition are the 1.2- of lithium molal quantity in the 4th filtrate
1.3 again.
Pass through magnetic separation in the step (4), obtain cobalt nickel by powder and copper-manganese powder, cobalt nickel by powder leads to after peracid dissolves
Enter ozone, obtain hydroxy cobalt oxide and nickel solution, hydroxy cobalt oxide is that 850-900 DEG C of calcining obtains battery in 2-4 hours in temperature
Grade cobaltosic oxide, nickel solution obtain nickel sulfate hexahydrate crystal by condensing crystallizing, and the sulfuric acid of 0.1-0.2mol/L is added in copper-manganese powder
Solution, obtains manganese solution and copper powder, and manganese solution obtains manganese sulfate crystal by condensing crystallizing.
P204 extractants after the washing are stripped by 5-6 stage countercurrents, and obtained strip liquor is obtained by condensing crystallizing
Technical grade sulfuric acid zinc, it is 50-51 to be concentrated into Baume degrees, and it is 10-15 DEG C to be then cooled to temperature, and mother liquor returns mixed with the second filtrate
It closes, the P507 extractants after washing are stripped by 5-6 stage countercurrents, and obtained strip liquor obtains technical grade sulfuric acid by condensing crystallizing
Magnesium, it is 52-53 to be concentrated into Baume degrees, and it is 10-15 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate.
The 4th filter residue return to step (2) is dissolved.
In reduction of dissolved process, following reaction occurs by taking hydrogen peroxide as an example:
2LiMO2+6H++H2O2→2M2++4H2O+2Li++O2(metals such as M Ni, Co, Mn).
This patent realizes the recycling of full constituent, and flow is short, and the rate of recovery of lithium is high, has finally obtained LITHIUM BATTERY carbonic acid
Lithium, and the granule size of battery-level lithium carbonate is moderate, narrow particle size distribution, good fluidity is suitble to do anode material of lithium battery.
The beneficial effects of the invention are as follows:Flow is short, simple process and low cost, and can realize the separation of full constituent and return
It receives, the rate of recovery is high, and finally obtained product purity is high, and added value of product is big, realizes recycling for material.
Specific implementation mode
Below with reference to specific embodiment, the present invention is described in detail, prepared by a kind of waste lithium cell of the present embodiment
The method of battery-level lithium carbonate is following steps:
1) it pre-processes, recycling old and useless battery material back or waste battery is obtained by dismantling after-broken-sieving
Battery particle;
2) by battery particle reducing leaching, according to solid-to-liquid ratio 1:3-10 addition bottom waters, addition acid for adjusting pH to 0.5-2.0,
50-90 DEG C of reaction temperature, reaction time 2-6 hour, while reducing agent is added, the mole that reducing agent is added is that trivalent metal rubs
0.5-4 times of that amount, reaction, which finishes, to be filtered, and the first filtrate and the first filter residue are obtained;
3) iron aluminium is removed, alkali, which is added, in the first filtrate adjusts back pH to 4-5.5, and iron therein, aluminium, chromium ion is made to precipitate so that
In solution then the second filtrate and the second filter residue is obtained by filtration less than 10mg/L in the content of iron, aluminium, chromium;
4) it cleans, zinc powder is added in the second filtrate, and being 50-70 DEG C in temperature reacts 2-3 hours, and filtering obtains third filtrate
With third filter residue, third filtrate obtains the raffinate containing nickel cobalt magnesium lithium after the extraction of P204 extractants is except iron, zinc, copper, manganese,
After extracting nickel cobalt magnesium with P507 extractants, obtained raffinate is the solution containing lithium, sodium;
5) deep impurity-removing will contain lithium raffinate and sodium hydroxide is added at 60-80 DEG C, and adjust pH to the 9-11 of solution,
It is reacted 2-3 hours under the conditions of this, filters, obtain the 4th filtrate and the 4th filter residue;
6) battery-level lithium carbonate is prepared, complexing agent is added in the 4th filtrate, ammonium hydrogen carbonate is then added, at 30-60 DEG C
Lower stirring is added, while it is 0.5-1 micron battery-level lithium carbonates as crystal seed that granularity, which is added, and addition is every liter of solution 5-10g,
It then heats to temperature to react 1-2 hours for 90-95 DEG C, filtration washing, drying sieving is packaged to be battery-level lithium carbonate.
100-200 mesh sieve is crossed in the step (1) when sieving.
The reducing agent being added in the step (2) is sulfur dioxide, hydrogen peroxide, sodium sulfite, iron powder or zinc powder.
In step (3) after readjustment pH to 4-5.5, it is 85-95 DEG C to be warming up to temperature, then passes to air and makes ferrous ion
It is fully oxidized to ferric iron, then proceedes to reaction 1-2 hours.
The granularity for the zinc powder being added in the step (4) is 100-150 mesh, and the molal quantity that zinc powder is added is in the second filtrate
1.1-1.2 times of nickel cobalt copper-manganese molal quantity, maintain be added zinc powder process pH be 3.5-4, P204 extractants extraction except iron, zinc,
Copper, manganese process extract for 8-10 stage countercurrents, and the volume flow ratio of P204 extractants and third filtrate is 1:3-5, having after extraction
Machine mutually passes through 5-6 stage countercurrents and washs, and cleaning solution return is extracted after being mixed with third filtrate, and cleaning solution uses 0.15-
The volume flow ratio of the sulfuric acid solution of 0.25mol/L, organic phase and cleaning solution after extraction is 1:0.1-0.15, P507 extractant
It when extracting the raffinate containing nickel cobalt magnesium lithium, is extracted using 8-10 stage countercurrents, P507 extractants and the raffinate containing nickel cobalt magnesium lithium
The volume flow ratio of liquid is 1:1-2, the organic phase after extraction are washed by 2-3 stage countercurrents, and cleaning solution returns and contains nickel cobalt magnesium
Extracted after the raffinate mixing of lithium, cleaning solution uses the sulfuric acid solution of 0.1-0.15mol/L, organic phase after extraction with wash
The volume flow ratio for washing liquid is 1:0.2-0.25.
It is filtered again after flocculant is added after completion of the reaction in the step (5), the amount that flocculant is added is per ton molten
30-40g flocculants, flocculant PAM is added in liquid.
Step (6) complexing agent is ammonium hydroxide, citric acid, tartaric acid, sulfosalicylic acid or EDTA, after complexing agent is added
A concentration of 0.1-0.2mol/L of complexing agent, the molal quantity of the ammonium hydrogen carbonate of addition are the 1.2- of lithium molal quantity in the 4th filtrate
1.3 again.
Pass through magnetic separation in the step (4), obtain cobalt nickel by powder and copper-manganese powder, cobalt nickel by powder leads to after peracid dissolves
Enter ozone, obtain hydroxy cobalt oxide and nickel solution, hydroxy cobalt oxide is that 850-900 DEG C of calcining obtains battery in 2-4 hours in temperature
Grade cobaltosic oxide, nickel solution obtain nickel sulfate hexahydrate crystal by condensing crystallizing, and the sulfuric acid of 0.1-0.2mol/L is added in copper-manganese powder
Solution, obtains manganese solution and copper powder, and manganese solution obtains manganese sulfate crystal by condensing crystallizing.
P204 extractants after the washing are stripped by 5-6 stage countercurrents, and obtained strip liquor is obtained by condensing crystallizing
Technical grade sulfuric acid zinc, it is 50-51 to be concentrated into Baume degrees, and it is 10-15 DEG C to be then cooled to temperature, and mother liquor returns mixed with the second filtrate
It closes, the P507 extractants after washing are stripped by 5-6 stage countercurrents, and obtained strip liquor obtains technical grade sulfuric acid by condensing crystallizing
Magnesium, it is 52-53 to be concentrated into Baume degrees, and it is 10-15 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate.
The 4th filter residue return to step (2) is dissolved.
Embodiment 1
A kind of method that waste lithium cell prepares battery-level lithium carbonate, is following steps:
1) it pre-processes, recycling old and useless battery material back or waste battery is obtained by dismantling after-broken-sieving
Battery particle;
2) by battery particle reducing leaching, according to solid-to-liquid ratio 1:7 are added bottom water, acid for adjusting pH are added to 1.85, reaction is warm
80 DEG C of degree, 4 hours reaction time, while reducing agent is added, the mole that reducing agent is added is the 0.9 of trivalent metal mole
Times, reaction, which finishes, to be filtered, and the first filtrate and the first filter residue are obtained;
3) iron aluminium is removed, alkali, which is added, in the first filtrate adjusts back pH to 4.8, makes iron therein, aluminium, chromium ion precipitation so that molten
In liquid then the second filtrate and the second filter residue is obtained by filtration less than 10mg/L in the content of iron, aluminium, chromium;
4) it cleans, zinc powder is added in the second filtrate, and being 65 DEG C in temperature reacts 2.7 hours, and filtering obtains third filtrate and the
Three filter residues, third filtrate obtain the raffinate containing nickel cobalt magnesium lithium after the extraction of P204 extractants is except iron, zinc, copper, manganese, use
After P507 extractants extract nickel cobalt magnesium, obtained raffinate is the solution containing lithium, sodium;
5) deep impurity-removing will contain lithium raffinate and sodium hydroxide is added at 72 DEG C, the pH to 10.5 of solution be adjusted, at this
It is reacted 2.5 hours under part, filters, obtain the 4th filtrate and the 4th filter residue;
6) battery-level lithium carbonate is prepared, complexing agent is added in the 4th filtrate, ammonium hydrogen carbonate is then added, is stirred at 55 DEG C
Addition is mixed, while it is 0.8 micron of battery-level lithium carbonate as crystal seed that granularity, which is added, addition is every liter of solution 8g, is then heated up
It is 93 DEG C to temperature to react 1.5 hours, filtration washing, drying sieving is packaged to be battery-level lithium carbonate.
150 mesh sieve is crossed in the step (1) when sieving.
The reducing agent being added in the step (2) is sulfur dioxide.
In step (3) after readjustment pH to 4.8, it is 89 DEG C to be warming up to temperature, then passes to air and so that ferrous ion is whole
It is oxidized to ferric iron, then proceedes to reaction 1.8 hours.
The granularity for the zinc powder being added in the step (4) is 125 mesh, and the molal quantity that zinc powder is added is nickel cobalt in the second filtrate
1.18 times of copper-manganese molal quantity, the pH for maintaining that zinc powder process is added are the extraction of 3.8, P204 extractants except iron, zinc, copper, manganese process
It is extracted for 9 stage countercurrents, the volume flow ratio of P204 extractants and third filtrate is 1:4.2, the organic phase after extraction is inverse by 6 grades
Stream washing, cleaning solution return are extracted after being mixed with third filtrate, and cleaning solution uses the sulfuric acid solution of 0.21mol/L, extraction
The volume flow ratio of organic phase and cleaning solution afterwards is 1:When 0.13, P507 extractant extracts the raffinate containing nickel cobalt magnesium lithium,
It is extracted using 9 stage countercurrents, the volume flow ratio of P507 extractants and the raffinate containing nickel cobalt magnesium lithium is 1:1.8, after extraction
Organic phase is washed by 3 stage countercurrents, and cleaning solution return is extracted after being mixed with the raffinate containing nickel cobalt magnesium lithium, and cleaning solution is adopted
With the sulfuric acid solution of 0.13mol/L, the volume flow ratio of organic phase and cleaning solution after extraction is 1:0.22.
It is filtered again after flocculant is added after completion of the reaction in the step (5), the amount that flocculant is added is per ton molten
35g flocculants, flocculant PAM is added in liquid.
Step (6) complexing agent is ammonium hydroxide, and a concentration of 0.15mol/L of complexing agent after complexing agent is added, addition
The molal quantity of ammonium hydrogen carbonate is 1.25 times of lithium molal quantity in the 4th filtrate.
Pass through magnetic separation in the step (4), obtain cobalt nickel by powder and copper-manganese powder, cobalt nickel by powder leads to after peracid dissolves
Enter ozone, obtain hydroxy cobalt oxide and nickel solution, hydroxy cobalt oxide is that 880 DEG C of calcinings obtain four oxygen of LITHIUM BATTERY in 3 hours in temperature
Change three cobalts, nickel solution obtains nickel sulfate hexahydrate crystal by condensing crystallizing, and copper-manganese powder is added the sulfuric acid solution of 0.15mol/L, obtains
Manganese solution and copper powder, manganese solution obtain manganese sulfate crystal by condensing crystallizing.
P204 extractants after the washing are stripped by 5 stage countercurrents, and obtained strip liquor obtains work by condensing crystallizing
Industry level zinc sulfate, it is 50.5 to be concentrated into Baume degrees, and it is 13 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate, is washed
P507 extractants after washing are stripped by 5.8 stage countercurrents, and obtained strip liquor obtains technical grade sulfuric acid magnesium by condensing crystallizing, dense
It is 52.5 to be reduced to Baume degrees, and it is 13 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate.
The 4th filter residue return to step (2) is dissolved.
Finally obtained lithium carbonate meets the requirement of professional standard YS/T 582-2013, wherein:
Index |
D10 |
D50 |
D90 |
D100 |
Mobility |
Numerical value |
3.5 micron |
5.8 micron |
9.1 micron |
9.8 micron |
15s/50g |
The purity 99.2% of obtained nickel sulfate hexahydrate crystal, the purity 99.1% of manganese sulfate crystal, the purity 99.2% of copper powder,
Technical grade sulfuric acid zinc purity is 98.8%, the purity 99.1% of magnesium sulfate.
Obtained battery-grade cobaltosic oxide detection data is as follows:
Co |
Na |
Cd |
Ni |
Mn |
Ca |
72.1% |
25ppm |
2ppm |
12ppm |
6ppm |
7ppm |
D10 |
D50 |
D90 |
BET |
Sulfate radical |
Tap density |
2.7 micron |
5.6 micron |
8.7 micron |
8.4m2/g |
51ppm |
2.6g/mL |
The rate of recovery 99.5% of final lithium synthesis, nickel, cobalt, manganese and magnesium comprehensive recovery be respectively 99.1%, 99.1%,
98.7% and 98.3%.
Embodiment 2
A kind of method that waste lithium cell prepares battery-level lithium carbonate, is following steps:
1) it pre-processes, recycling old and useless battery material back or waste battery is obtained by dismantling after-broken-sieving
Battery particle;
2) by battery particle reducing leaching, according to solid-to-liquid ratio 1:6 are added bottom water, acid for adjusting pH are added to 1.32, reaction is warm
65 DEG C of degree, 4.2 hours reaction time, while reducing agent is added, the mole that reducing agent is added is the 1.8 of trivalent metal mole
Times, reaction, which finishes, to be filtered, and the first filtrate and the first filter residue are obtained;
3) iron aluminium is removed, alkali, which is added, in the first filtrate adjusts back pH to 5.2, makes iron therein, aluminium, chromium ion precipitation so that molten
In liquid then the second filtrate and the second filter residue is obtained by filtration less than 10mg/L in the content of iron, aluminium, chromium;
4) it cleans, zinc powder is added in the second filtrate, and being 62 DEG C in temperature reacts 2.5 hours, and filtering obtains third filtrate and the
Three filter residues, third filtrate obtain the raffinate containing nickel cobalt magnesium lithium after the extraction of P204 extractants is except iron, zinc, copper, manganese, use
After P507 extractants extract nickel cobalt magnesium, obtained raffinate is the solution containing lithium, sodium;
5) deep impurity-removing will contain lithium raffinate and sodium hydroxide is added at 75 DEG C, the pH to 10.2 of solution be adjusted, at this
It is reacted 2.3 hours under part, filters, obtain the 4th filtrate and the 4th filter residue;
6) battery-level lithium carbonate is prepared, complexing agent is added in the 4th filtrate, ammonium hydrogen carbonate is then added, is stirred at 45 DEG C
Addition is mixed, while it is 0.8 micron of battery-level lithium carbonate as crystal seed that granularity, which is added, addition is every liter of solution 8g, is then heated up
It is 93 DEG C to temperature to react 1.8 hours, filtration washing, drying sieving is packaged to be battery-level lithium carbonate.
150 mesh sieve is crossed in the step (1) when sieving.
The reducing agent being added in the step (2) is sodium sulfite.
In step (3) after readjustment pH to 5.2, it is 92 DEG C to be warming up to temperature, then passes to air and so that ferrous ion is whole
It is oxidized to ferric iron, then proceedes to reaction 1.3 hours.
The granularity for the zinc powder being added in the step (4) is 125 mesh, and the molal quantity that zinc powder is added is nickel cobalt in the second filtrate
1.16 times of copper-manganese molal quantity, the pH for maintaining that zinc powder process is added are the extraction of 3.8, P204 extractants except iron, zinc, copper, manganese process
It is extracted for 10 stage countercurrents, the volume flow ratio of P204 extractants and third filtrate is 1:5, the organic phase after extraction is inverse by 6 grades
Stream washing, cleaning solution return are extracted after being mixed with third filtrate, and cleaning solution uses the sulfuric acid solution of 0.19mol/L, extraction
The volume flow ratio of organic phase and cleaning solution afterwards is 1:When 0.13, P507 extractant extracts the raffinate containing nickel cobalt magnesium lithium,
It is extracted using 9 stage countercurrents, the volume flow ratio of P507 extractants and the raffinate containing nickel cobalt magnesium lithium is 1:1.8, after extraction
Organic phase is washed by 3 stage countercurrents, and cleaning solution return is extracted after being mixed with the raffinate containing nickel cobalt magnesium lithium, and cleaning solution is adopted
With the sulfuric acid solution of 0.13mol/L, the volume flow ratio of organic phase and cleaning solution after extraction is 1:0.22.
It is filtered again after flocculant is added after completion of the reaction in the step (5), the amount that flocculant is added is per ton molten
38g flocculants, flocculant PAM is added in liquid.
Step (6) complexing agent is EDTA, and a concentration of 0.12mol/L of complexing agent after complexing agent is added, addition
The molal quantity of ammonium hydrogen carbonate is 1.23 times of lithium molal quantity in the 4th filtrate.
Pass through magnetic separation in the step (4), obtain cobalt nickel by powder and copper-manganese powder, cobalt nickel by powder leads to after peracid dissolves
Enter ozone, obtain hydroxy cobalt oxide and nickel solution, hydroxy cobalt oxide is that 885 DEG C of calcinings obtain LITHIUM BATTERY four in 3.5 hours in temperature
Co 3 O, nickel solution obtain nickel sulfate hexahydrate crystal by condensing crystallizing, and copper-manganese powder is added the sulfuric acid solution of 0.15mol/L, obtains
To manganese solution and copper powder, manganese solution obtains manganese sulfate crystal by condensing crystallizing.
P204 extractants after the washing are stripped by 6 stage countercurrents, and obtained strip liquor obtains work by condensing crystallizing
Industry level zinc sulfate, it is 50.6 to be concentrated into Baume degrees, and it is 12 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate, is washed
P507 extractants after washing are stripped by 6 stage countercurrents, and obtained strip liquor obtains technical grade sulfuric acid magnesium by condensing crystallizing, are concentrated
It is 52.3 to Baume degrees, it is 13 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate.
The 4th filter residue return to step (2) is dissolved.
Finally obtained lithium carbonate meets the requirement of professional standard YS/T 582-2013, wherein:
Index |
D10 |
D50 |
D90 |
D100 |
Mobility |
Numerical value |
3.8 micron |
5.8 micron |
9.2 micron |
9.7 micron |
16s/50g |
The purity 99.1% of obtained nickel sulfate hexahydrate crystal, the purity 99.1% of manganese sulfate crystal, the purity 99.2% of copper powder,
Technical grade sulfuric acid zinc purity is 98.7%, the purity 99.1% of magnesium sulfate.
Obtained battery-grade cobaltosic oxide detection data is as follows:
Co |
Na |
Cd |
Ni |
Mn |
Ca |
72.1% |
22ppm |
1ppm |
13ppm |
8ppm |
9ppm |
D10 |
D50 |
D90 |
BET |
Sulfate radical |
Tap density |
2.7 micron |
5.7 micron |
8.8 micron |
8.2m2/g |
59ppm |
2.58g/mL |
The rate of recovery 99.6% of final lithium synthesis, nickel, cobalt, manganese and magnesium comprehensive recovery be respectively 99.2%, 99.1%,
98.3% and 98.8%.
Embodiment 3
A kind of method that waste lithium cell prepares battery-level lithium carbonate, is following steps:
1) it pre-processes, recycling old and useless battery material back or waste battery is obtained by dismantling after-broken-sieving
Battery particle;
2) by battery particle reducing leaching, according to solid-to-liquid ratio 1:5.5 are added bottom water, and acid for adjusting pH is added to 1.85, reacts
83 DEG C of temperature, 4.5 hours reaction time, while reducing agent is added, the mole that reducing agent is added is trivalent metal mole
1.8 times, reaction, which finishes, to be filtered, and the first filtrate and the first filter residue are obtained;
3) iron aluminium is removed, alkali, which is added, in the first filtrate adjusts back pH to 5.3, makes iron therein, aluminium, chromium ion precipitation so that molten
In liquid then the second filtrate and the second filter residue is obtained by filtration less than 10mg/L in the content of iron, aluminium, chromium;
4) it cleans, zinc powder is added in the second filtrate, and being 65 DEG C in temperature reacts 2.8 hours, and filtering obtains third filtrate and the
Three filter residues, third filtrate obtain the raffinate containing nickel cobalt magnesium lithium after the extraction of P204 extractants is except iron, zinc, copper, manganese, use
After P507 extractants extract nickel cobalt magnesium, obtained raffinate is the solution containing lithium, sodium;
5) deep impurity-removing will contain lithium raffinate and sodium hydroxide is added at 72 DEG C, the pH to 10.7 of solution be adjusted, at this
It is reacted 2.8 hours under part, filters, obtain the 4th filtrate and the 4th filter residue;
6) battery-level lithium carbonate is prepared, complexing agent is added in the 4th filtrate, ammonium hydrogen carbonate is then added, is stirred at 55 DEG C
Addition is mixed, while it is 0.8 micron of battery-level lithium carbonate as crystal seed that granularity, which is added, addition is every liter of solution 8.5g, is then risen
Temperature to temperature is 93 DEG C and reacts 1.8 hours that filtration washing, drying sieving is packaged to be battery-level lithium carbonate.
175 mesh sieve is crossed in the step (1) when sieving.
The reducing agent being added in the step (2) is zinc powder.
In step (3) after readjustment pH to 5.3, it is 94 DEG C to be warming up to temperature, then passes to air and so that ferrous ion is whole
It is oxidized to ferric iron, then proceedes to reaction 1.8 hours.
The granularity for the zinc powder being added in the step (4) is 125 mesh, and the molal quantity that zinc powder is added is nickel cobalt in the second filtrate
1.15 times of copper-manganese molal quantity, the pH for maintaining that zinc powder process is added are the extraction of 3.8, P204 extractants except iron, zinc, copper, manganese process
It is extracted for 8 stage countercurrents, the volume flow ratio of P204 extractants and third filtrate is 1:4.3, the organic phase after extraction is inverse by 6 grades
Stream washing, cleaning solution return are extracted after being mixed with third filtrate, and cleaning solution uses the sulfuric acid solution of 0.18mol/L, extraction
The volume flow ratio of organic phase and cleaning solution afterwards is 1:When 0.13, P507 extractant extracts the raffinate containing nickel cobalt magnesium lithium,
It is extracted using 10 stage countercurrents, the volume flow ratio of P507 extractants and the raffinate containing nickel cobalt magnesium lithium is 1:1.2, after extraction
Organic phase is washed by 3 stage countercurrents, and cleaning solution return is extracted after being mixed with the raffinate containing nickel cobalt magnesium lithium, and cleaning solution is adopted
With the sulfuric acid solution of 0.12mol/L, the volume flow ratio of organic phase and cleaning solution after extraction is 1:0.22.
It is filtered again after flocculant is added after completion of the reaction in the step (5), the amount that flocculant is added is per ton molten
33g flocculants, flocculant PAM is added in liquid.
Step (6) complexing agent is sulfosalicylic acid, and a concentration of 0.11mol/L of complexing agent after complexing agent is added,
The molal quantity of the ammonium hydrogen carbonate of addition is 1.27 times of lithium molal quantity in the 4th filtrate.
Pass through magnetic separation in the step (4), obtain cobalt nickel by powder and copper-manganese powder, cobalt nickel by powder leads to after peracid dissolves
Enter ozone, obtain hydroxy cobalt oxide and nickel solution, hydroxy cobalt oxide is that 885 DEG C of calcinings obtain LITHIUM BATTERY four in 3.2 hours in temperature
Co 3 O, nickel solution obtain nickel sulfate hexahydrate crystal by condensing crystallizing, and copper-manganese powder is added the sulfuric acid solution of 0.14mol/L, obtains
To manganese solution and copper powder, manganese solution obtains manganese sulfate crystal by condensing crystallizing.
P204 extractants after the washing are stripped by 6 stage countercurrents, and obtained strip liquor obtains work by condensing crystallizing
Industry level zinc sulfate, it is 50.3 to be concentrated into Baume degrees, and it is 13 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate, is washed
P507 extractants after washing are stripped by 6 stage countercurrents, and obtained strip liquor obtains technical grade sulfuric acid magnesium by condensing crystallizing, are concentrated
It is 52.5 to Baume degrees, it is 14 DEG C to be then cooled to temperature, and mother liquor return is mixed with the second filtrate.
The 4th filter residue return to step (2) is dissolved.
Finally obtained lithium carbonate meets the requirement of professional standard YS/T 582-2013, wherein:
Index |
D10 |
D50 |
D90 |
D100 |
Mobility |
Numerical value |
3.8 micron |
6.1 micron |
9.3 micron |
9.9 micron |
15s/50g |
The purity 99.1% of obtained nickel sulfate hexahydrate crystal, the purity 99.1% of manganese sulfate crystal, the purity 99.1% of copper powder,
Technical grade sulfuric acid zinc purity is 98.9%, the purity 99.1% of magnesium sulfate.
Obtained battery-grade cobaltosic oxide detection data is as follows:
Co |
Na |
Cd |
Ni |
Mn |
Ca |
72.2% |
22ppm |
1ppm |
11ppm |
7ppm |
8ppm |
D10 |
D50 |
D90 |
BET |
Sulfate radical |
Tap density |
2.8 micron |
5.7 micron |
8.6 micron |
8.2m2/g |
43ppm |
2.55g/mL |
The rate of recovery 99.6% of final lithium synthesis, nickel, cobalt, manganese and magnesium comprehensive recovery be respectively 99.2%, 99.1%,
98.8% and 98.3%.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.