CN110042225A - A kind of roasting of lepidolite ore sodium sulphate and leaching method - Google Patents
A kind of roasting of lepidolite ore sodium sulphate and leaching method Download PDFInfo
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- CN110042225A CN110042225A CN201910341936.3A CN201910341936A CN110042225A CN 110042225 A CN110042225 A CN 110042225A CN 201910341936 A CN201910341936 A CN 201910341936A CN 110042225 A CN110042225 A CN 110042225A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/06—Sulfating roasting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
- C22B26/12—Obtaining lithium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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Abstract
The invention belongs to ores to mention lithium technology field, and in particular to a kind of roasting of lepidolite ore sodium sulphate and leaching method.The following steps are included: (1) raw material are processed, sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to setting degree；(2) lepidolite concentrate powder and step (1) levigate sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are uniformly mixed by mixing in the ratio of setting；(3) calcine, said mixture material calcine at 850~1000 DEG C obtain roast clinker be known as calcining；(4) levigate；(5) levigate calcining is transferred in batch extractor, leaches lithium, the rubidium in calcining；(6) leached mud is mixed with the water of set amount, in set temperature, agitator treating washes out lithium, the rubidium, caesium in leached mud.Technical solution of the present invention does not use potassium sulfate, only uses single sodium sulphate, and sodium sulphate is the byproduct of lithium carbonate precipitation process, is not necessarily to outsourcing, reduces reagent cost, sulfating roasting technique is made to be provided with economy.
Description
Technical field
The invention belongs to ores to mention lithium technology field, and in particular to a kind of roasting of lepidolite ore sodium sulphate and leaching method.
Background technique
Due to the development of electric car, demand of the lithium battery in world market is constantly soaring and causes the demand to lithium
It is quickly soaring, how to develop and use various lithium resources and prepare lithium carbonate, meet the needs of market is to lithium carbonate, is pendulum in our faces
Preceding urgent task.
Lithium mainly exists in the form of solid mineral resource and two kinds of liquid Mineral resource in nature, solid mineral resource
It is divided into spodumene mineral and lepidolite mineral again.Chinese spodumene mineral resources compare shortage, and lepidolite is but very abundant, Jiangxi Province
Yichun Prefecture's lepidolite reserves are huge, and the reserves (in terms of lithia) of lithium are 257.8 ten thousand tons.In lepidolite also containing potassium, rubidium,
A variety of valuable elements such as caesium, fluorine, therefore lithium carbonate, and synthetical recovery valuable element are extracted by raw material of lepidolite, have wide
Market prospects and good economic benefit.
Lepidolite extracted lithium method mainly has acid system, alkaline process, salt method three categories.
Acid system generally needs preparatory high temperature defluorinate roasting to destroy micaceous structure mainly using sulfuric acid as leaching agent, or adds sulfuric acid roasting
It burns, then leaches again.In the presence of calcining defluorinate energy consumption is high, environmental pollution is big, sulfuric acid dosage is larger, leachate spent acid is high, neutralizes slag
The disadvantages of yield is big.
Alkaline process has traditional limestone sintering process, roasting defluorinate lime autoclaving method, the direct autoclaving method of milk of lime etc..Lime stone
Sintering process lepidolite ore per ton needs to admix 3.5 tons of lime stones, roasts at 950~1050 DEG C, and throughput is big, and energy consumption is high, leaching
Liquid lithium concentration is low out, and the leaching rate of lithium is not high；Lime autoclaving method liquid-solid ratio is big, and filtering is difficult with washing, and leachate lithium concentration is low,
The leaching rate of lithium is not high.
Salt method mixed with sulfate, chloride etc. and lepidolite after at high temperature calcination reaction mention lithium.The roasting of chlorate method
Generate chlorine, environmental pollution is big, equipment seriously corroded, and in lithium carbonate product chlorine root be easy it is exceeded.Traditional sulfate process
Potassium sulfate is generally used, the sulfating roasting method of improvement is also mainly based on potassium sulfate, and potassium sulfate is expensive, reagent cost
It is high.
In existing technical solution, Guo Chunping has delivered the article that lepidolite sulfate proposes lithium research, lepidolite and sulfuric acid
The mass ratio of salt is 1:0.45,900 DEG C of maturing temperature, under calcining time 1h, and lithium leaching rate can be to 95% or so, sulfuric acid used
Salt is potassium sulfate and calcium sulfate, and the dosage of potassium sulfate is preferably equivalent at least the amount of calcium sulfate.
Wang Jianling has delivered the article that sulfate process produces the research of lithium carbonate from lepidolite, lepidolite: potassium sulfate: sulfuric acid
Sodium: calcium oxide=100:15:35:3.5 roasts at 900 DEG C~980 DEG C, is leached after roasting clinker is levigate with acid water, lithium leaching
Extracting rate reaches 94%.
Luo Linshan has delivered the article that lepidolite salt-mixture mentions lithium and analyses the recycling and reusing of salt, using sodium sulphate, sulfuric acid
Four kinds of calcium, calcium chloride, sodium chloride salt-mixtures, the ratio of lepidolite and these four salt are as follows: 10:2:2:1:2,900 DEG C of maturing temperature,
Under calcining time 1h, lithium leaching rate can be to 93.35%.
Patent CN1827527A discloses the method for a kind of lepidolite and sodium sulphate and calcium salt Roasting And Leaching lithium, specially lithium
Mica and CaSO4、CaF2、Na2SO4Mixing is roasted at 900~1100 DEG C, uses diluted acid leaching after calcining is levigate, this patent is best
Under the conditions of the leaching rate of lithium be 90.1%, in slag also containing 0.3% lithium, the leaching of rubidium caesium is in confused situation.
Patent CN85101989A discloses the method for a kind of lepidolite and potassium sulfate Roasting And Leaching lithium, specially 1 part of lithium cloud
Female and 0.5 part of K2SO4Mixing roasts at 950 DEG C, is gone out after calcining is levigate with water logging, lithium leaching rate 85.3~89.4%.
Traditional sulfating roasting method generally uses single potassium sulfate, or few some sodium sulphate are mixed based on potassium sulfate
Or other sulfate, potassium sulfate is expensive, and reagent cost is high, and due to the high lithium potassium sulfate easy to produce of potassium concn in leachate
Double salt precipitation limits the raising of lithium concentration, thus traditional lepidolite sulfating roasting proposes lithium process industry application value not
It is high.Sulfating roasting proposes the dosage that lithium technique seeks to reduce to the greatest extent the dosage increase sodium sulphate of potassium sulfate at present, is guaranteeing lithium
Under the premise of leaching rate, the reagent cost of potassium sulfate is reduced as far as possible, but after the dosage of increase sodium sulphate, sintering occurs for calcining even
Melting leads to not carry out industrial operation, and the leaching rate of rubidium caesium is very low.
Traditional technical solution needs to develop a kind of lepidolite ore sodium sulphate roasting and leaching due to facing above-mentioned deficiency
Method out, to solve the above problems.
Summary of the invention
The technical problem to be solved in the present invention is to provide it is a kind of it is economical, industry roasting operability, answered with industry
With the lepidolite ore sodium sulphate roasting of value and leaching method.
In order to realize the purpose, the technical solution adopted by the present invention is that:
A kind of roasting of lepidolite concentrate powder sodium sulphate and leaching method, comprising the following steps:
(1) raw material are processed
Sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to setting degree；
(2) mixing
By lepidolite concentrate powder and step (1) levigate sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer by setting
Ratio is uniformly mixed；
(3) it calcines
Said mixture material is calcined at 850~1000 DEG C obtain roasting clinker be known as calcining；
(4) levigate
By calcining pulverizing and jevigating to setting granularity；
(5) it leaches
Levigate calcining is transferred in batch extractor, lithium, the rubidium in calcining are leached；
Leaching agent is sulfuric acid solution, and leaching agent dosage is 1~2 times of lepidolite concentrate powder quality, and temperature is 30~90 DEG C；
(6) slurrying is washed
Leached mud is mixed with the water of set amount, in set temperature, agitator treating, in the leached mud for washing out step (5)
Lithium, rubidium, caesium.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method will in step (1)
Sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to 90% less than 100 mesh.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method, in step (2), sulphur
Sour sodium dosage is the 40~60% of lepidolite concentrate powder quality；
CaO dosage is the 10~30% of lepidolite concentrate powder quality；
CaCO3Dosage is the 5~20% of lepidolite concentrate powder quality；
Rubidium caesium displacer (strontium sulfate) dosage is the 2~10% of lepidolite concentrate powder quality.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method, in step (2), rubidium
Caesium displacer is sulfate.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method, in step (2), rubidium
Caesium displacer is strontium sulfate.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method in step (3), are forged
Burning temperature is 875~975 DEG C, and calcination time is 60~120min.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method will in step (4)
Calcining of the calcining pulverizing and jevigating to 90% or more is less than 100 mesh.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method, in step (5), leaching
Agent is the sulfuric acid solution of 20~100g/L out, and leaching agent dosage is 1.0~1.2 times of lepidolite concentrate powder quality；Temperature is 60
~80 DEG C；Mixing time is 60~90min.
Further, a kind of lepidolite concentrate powder sodium sulphate roasting as described above and leaching method in step (6), are washed
Water consumption is 1~2 times of lepidolite concentrate powder quality, and temperature is 50 DEG C, mixing time 30min.
The beneficial effect of technical solution of the present invention is:
1, potassium sulfate is not used, single sodium sulphate is only used, sodium sulphate is the byproduct of lithium carbonate precipitation process, without outer
Purchase, reduces reagent cost, sulfating roasting technique is made to be provided with economy.
2, CaO and CaCO is added when roasting3, improve the sintering character of calcining, so that the calcining after increasing sodium sulphate dosage
Adhesion will not be melted, smooth can be discharged in commercial plant, CaCO3Addition so that calcining is loose porous, improve calcining conversion
Rate.
3, the leaching rate of traditional sulfating roasting technique rubidium caesium is very low, and the reagent that code name is X is added in the present invention, improves
The leaching rate of rubidium caesium.
4, leachate lithium concentration is high, due to not using potassium sulfate, will not due in leachate potassium concn height be also easy to produce sulfuric acid
Lithium potassium double salt precipitation and limit the concentration of lithium, lithium concentration energy consumption is greatly decreased up to 16g/L or more in leachate lithium concentration.
Detailed description of the invention
Fig. 1 is lepidolite ore sodium sulphate of the present invention roasting and leaching method flow diagram.
Specific embodiment
Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments.
Technical solution of the present invention does not use potassium sulfate that is expensive and restricting leachate lithium concentration, only uses sodium sulphate,
And sodium sulphate is the byproduct of lithium carbonate precipitation process, is not necessarily to outsourcing.By the way that CaO and CaCO is added3Improve the agglutinating property of calcining
Can, utilize CaCO3CO can be released in high-temperature calcination2The characteristic of gas can make calcining become loose porous.Due to CaCO3With
White lime is compared, the content of effective component CaO low 44%, therefore CaO and CaCO3Respectively plus half.Since sodium sulphate is only added not
Potassium sulfate is added, avoids limitation of the presence to lithium concentration of potassium sulfate in leachate, the leaching of available higher li concentration
Liquid.
Technical solution of the present invention lepidolite sulfate process proposes the principle of lithium: under the high temperature conditions, ion exchange reaction occurs,
Metal ion i.e. in additive occupies former lithium ion locations of structures, and lithium ion is detached from the aluminosilicate of slightly solubility
Soluble sulphate is formed, process flow chart is shown in figure one, and sulfating roasting reaction equation is as follows:
KLi2Al(Si4O11)(F,OH)2(lepidolite)+K2SO4→KAlSiO4(kaliophilite)+KAlSi2O6(leucite)+
Li2SO4+H2O+HF↑
According to operating procedure disclosed by the invention and related parameter, those skilled in the art can be according to the operation of this method
Principle achieves the object of the present invention, and is not limited to using equipment used in specific embodiment itself and its usage mode.
Below with reference to 4 embodiments, the present invention is described in detail.Embodiment has selected same lepidolite ore to carry out,
Certain lepidolite ore composition is shown in Table 1.
1 lepidolite ore composition of table
| Ingredient | Li2O | SiO2 | Al2O3 | K2O | Fe2O3 | MnO | F | Rb2O | Na2O | Cs2O |
| Content % | 3.05 | 50.1 | 3.5 | 7.6 | 2.2 | 0.40 | 4.2 | 1.03 | 1.68 | 0.065 |
As shown in Figure 1, a kind of lepidolite concentrate powder sodium sulphate roasting of the present invention and leaching method, comprising the following steps:
(1) raw material are processed
Sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to 90% less than 100 mesh.
(2) mixing
By lepidolite concentrate powder and step (1) levigate sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer by setting
Ratio is uniformly mixed；
Sodium sulphate dosage is the 40~60% of lepidolite concentrate powder quality；
CaO dosage is the 10~30% of lepidolite concentrate powder quality；
CaCO3Dosage is the 5~20% of lepidolite concentrate powder quality；
Rubidium caesium displacer is strontium sulfate, and dosage is the 2~10% of lepidolite concentrate powder quality.
(3) it calcines
Said mixture material is calcined at 850~1000 DEG C obtain roasting clinker be known as calcining；
Preferably, calcination temperature is 875~975 DEG C, and calcination time is 60~120min.
(4) levigate
By the calcining of calcining pulverizing and jevigating to 90% or more less than 100 mesh；
(5) it leaches
Levigate calcining is transferred in batch extractor, lithium, the rubidium in calcining are leached；
Leaching agent is the sulfuric acid solution of 20~100g/L, and leaching agent dosage is the 1.0~1.2 of lepidolite concentrate powder quality
Times；Temperature is 60~80 DEG C；Mixing time is 60~90min.
(6) slurrying is washed
Leached mud is mixed with the water of set amount, in set temperature, agitator treating, in the leached mud for washing out step (5)
Lithium, rubidium, caesium.
Wash water dosage is 1~2 times of lepidolite concentrate powder quality, and temperature is 50 DEG C, mixing time 30min.
The specific embodiment of above-mentioned technical proposal is as follows.
Embodiment one
It is operated as follows:
1. taking 100g lepidolite concentrate, following reagent: 10g K is weighed2SO4、30g Na2SO4、5g CaO、5gCaCO3、3g
Rubidium caesium displacer, additive is mixed and finely ground to 50% less than 200 mesh；
2. lepidolite concentrate is uniformly mixed with levigate reagent；
3. the material of mixing is placed in crucible in 975 DEG C of roasting 60min；
4. calcining pulverizing and jevigating is less than -100 mesh to 90%；
It is leached 5. levigate calcining is transferred in batch extractor, leaching agent is the sulfuric acid solution of 20g/L
100ml, temperature 60 C stir 90min, filtering；
6. slurrying is washed, the slurrying of 150ml water, agitator treating, temperature 50 C, when agitator treating is added in leached mud
Between 30min, filtering, gained washing water carries out leaching after returning to complex acid.
Leachate analysis lithium concentration, leached mud drying weighing, analyzes lithium, rubidium content, calculates the slag meter leaching rate of lithium, rubidium.
Other three embodiment operating procedures are identical with embodiment one, only change reagent addition with when certain
Four embodiment roastings and the operating condition and result that leach are listed in table 2, table 3. by a little operating parameters
2 embodiment roasting condition of table
3 embodiment leaching condition of table and result
In 4 embodiments, the leaching rate of lithium is 88.7%~92.5%, and the leaching rate highest of lithium is roasted at 950 DEG C,
Reach 92.5%；Rubidium caesium displacer has crucial effect to the leaching of rubidium, and when rubidium caesium displacer is not added, the leaching rate of rubidium is preferably only
Have 4.6%, after having added 10% rubidium caesium displacer, the leaching rate of rubidium reaches 62.7%.It, can since the market of rubidium is very small
To adjust the dosage of rubidium caesium displacer according to the market situation of rubidium, and do not have to make any change to technique, rubidium caesium can be adjusted at any time
Yield.
The above is presently preferred embodiments of the present invention, is not made any form of restriction to invention, of the invention
Technical spirit is to convert lepidolite ore phase using sulfating roasting, and additive improvement calcining sintering character is added, and improves rubidium
Leaching rate keeps lepidolite sulfating roasting technique economical and commercial operability.All technical spirits pair under this invention
Above embodiments make any simple modification, equivalent change and modification, belong to the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of lepidolite concentrate powder sodium sulphate roasting and leaching method, which comprises the following steps:
(1) raw material are processed
Sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to setting degree；
(2) mixing
By lepidolite concentrate powder and step (1) levigate sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer in the ratio of setting
It is uniformly mixed；
(3) it calcines
Said mixture material is calcined at 850~1000 DEG C obtain roasting clinker be known as calcining；
(4) levigate
By calcining pulverizing and jevigating to setting granularity；
(5) it leaches
Levigate calcining is transferred in batch extractor, lithium, the rubidium in calcining are leached；
Leaching agent is sulfuric acid solution, and leaching agent dosage is 1~2 times of lepidolite concentrate powder quality, and temperature is 30~90 DEG C；
(6) slurrying is washed
Leached mud is mixed with the water of set amount, in set temperature, agitator treating, wash out lithium in the leached mud of step (5),
Rubidium, caesium.
2. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(1) in, sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to 90% less than 100 mesh.
3. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(2) in, sodium sulphate dosage is the 40~60% of lepidolite concentrate powder quality；
CaO dosage is the 10~30% of lepidolite concentrate powder quality；
CaCO3Dosage is the 5~20% of lepidolite concentrate powder quality；
Rubidium caesium displacer dosage is the 2~10% of lepidolite concentrate powder quality.
4. a kind of lepidolite concentrate powder sodium sulphate roasting as claimed in claim 3 and leaching method, it is characterised in that: step
(2) in, rubidium caesium displacer is sulfate.
5. a kind of lepidolite concentrate powder sodium sulphate roasting as claimed in claim 4 and leaching method, it is characterised in that: step
(2) in, rubidium caesium displacer is strontium sulfate.
6. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(3) in, calcination temperature is 875~975 DEG C, and calcination time is 60~120min.
7. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(4) in, by the calcining of calcining pulverizing and jevigating to 90% or more less than 100 mesh.
8. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(5) in, leaching agent is the sulfuric acid solution of 20~100g/L, and leaching agent dosage is 1.0~1.2 times of lepidolite concentrate powder quality；
Temperature is 60~80 DEG C；Mixing time is 60~90min.
9. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(6) in, wash water dosage is 1~2 times of lepidolite concentrate powder quality, and temperature is 50 DEG C, mixing time 30min.
10. a kind of lepidolite concentrate powder sodium sulphate roasting as described in claim 1 and leaching method, it is characterised in that: step
(1) in, sodium sulphate, calcium oxide, calcium carbonate and rubidium caesium displacer are milled down to 90% less than 100 mesh；
In step (2), sodium sulphate dosage is the 40~60% of lepidolite concentrate powder quality；
CaO dosage is the 10~30% of lepidolite concentrate powder quality；
CaCO3Dosage is the 5~20% of lepidolite concentrate powder quality；
Rubidium caesium displacer dosage is the 2~10% of lepidolite concentrate powder quality；
Rubidium caesium displacer is strontium sulfate；
In step (3), calcination temperature is 875~975 DEG C, and calcination time is 60~120min；
In step (4), by the calcining of calcining pulverizing and jevigating to 90% or more less than 100 mesh；
In step (5), leaching agent is the sulfuric acid solution of 20~100g/L, and leaching agent dosage is the 1.0 of lepidolite concentrate powder quality
~1.2 times；Temperature is 60~80 DEG C；Mixing time is 60~90min；
In step (6), wash water dosage is 1~2 times of lepidolite concentrate powder quality, and temperature is 50 DEG C, mixing time 30min.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113104867A (en) * | 2021-04-07 | 2021-07-13 | 江西南氏锂电新材料有限公司 | Method for preparing lithium carbonate by acidifying and roasting lepidolite through composite sulfate |
| CN113387381A (en) * | 2021-05-10 | 2021-09-14 | 江西铜业技术研究院有限公司 | Process for producing industrial precipitated barium sulfate by taking barite concentrate as raw material |
| CN114436300A (en) * | 2022-01-14 | 2022-05-06 | 广东省科学院资源利用与稀土开发研究所 | Method for acidifying and leaching lithium by spodumene |
| CN114507779A (en) * | 2022-02-18 | 2022-05-17 | 华东理工大学 | Method for producing lithium sulfate solution by spodumene sulfate roasting method |
| GB2608460A (en) * | 2021-07-02 | 2023-01-04 | British Lithium Ltd | Process for the recovery and reuse of sulphate reagents from brines derived from lithium micas |
| CN115572820A (en) * | 2022-09-27 | 2023-01-06 | 宜春银锂新能源有限责任公司 | Method for pretreating lepidolite before roasting |
| CN116240400A (en) * | 2023-02-27 | 2023-06-09 | 宜春江理锂电新能源产业研究院 | Method for efficiently extracting lithium from lepidolite lithium extraction waste residue at low temperature |
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| GB2608460A (en) * | 2021-07-02 | 2023-01-04 | British Lithium Ltd | Process for the recovery and reuse of sulphate reagents from brines derived from lithium micas |
| CN114436300A (en) * | 2022-01-14 | 2022-05-06 | 广东省科学院资源利用与稀土开发研究所 | Method for acidifying and leaching lithium by spodumene |
| CN114507779A (en) * | 2022-02-18 | 2022-05-17 | 华东理工大学 | Method for producing lithium sulfate solution by spodumene sulfate roasting method |
| CN114507779B (en) * | 2022-02-18 | 2024-04-09 | 华东理工大学 | Method for producing lithium sulfate solution by spodumene sulfate roasting method |
| CN115572820A (en) * | 2022-09-27 | 2023-01-06 | 宜春银锂新能源有限责任公司 | Method for pretreating lepidolite before roasting |
| CN116240400A (en) * | 2023-02-27 | 2023-06-09 | 宜春江理锂电新能源产业研究院 | Method for efficiently extracting lithium from lepidolite lithium extraction waste residue at low temperature |
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