CN103572317A - Method for refining electrolytic manganese dioxide product - Google Patents
Method for refining electrolytic manganese dioxide product Download PDFInfo
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Abstract
The invention belongs to the field of battery material processing, and specifically relates to a method for refining an electrolytic manganese dioxide product. The preparation method comprises the steps of a six-stage rinsing process, grinding, magnetic separation, screening and blending, and the like, namely, carrying out hot-water acid rinsing, weak-base rinsing, strong-base rinsing, hot-water base rinsing, dilute acid back-rinsing, and hot-water rinsing under the condition of high temperature so as to remove sulfuric acid and low-valence manganese remaining in electrolytic manganese dioxide; grinding into powder, and carrying out powdery magnetic separation on the powder so as to carry out impurity removal on residual Fe in a finished product; carrying out particle size distribution control on the finished product by using a swinging screen technology so as to reduce the interfusion of coarse particles and other non-metallic impurities in the powder; blending so as to obtain an electrolytic manganese dioxide finished product. According to the invention, the content of manganese dioxide in electrolytic manganese dioxide is improved, the PH value of the electrolytic manganese dioxide product is controlled, the quality of the product is stable, the iron content of the product subjected to magnetic separation is reduced by 5-10 ppm, and the content of Mo is reduced by 0.5 ppm, therefore, a high-quality electrolytic manganese dioxide product is produced.
Description
Technical field
The invention belongs to battery material manufacture field, specifically a kind of process for purification of electrolytic manganese dioxide product.
Background technology
In the production process of battery electrolysis special Manganse Dioxide, after certain electrolysing period, on anode, obtain the block work in-process of Manganse Dioxide, Manganse Dioxide precipitate is taken out together with anode from electrolyzer, then use hot-water soak, remove electrolytic solution and other foreign material of precipitate surface attachment, then Manganse Dioxide precipitate is peeled off out from electrode, obtain block Manganse Dioxide work in-process.In the Manganse Dioxide work in-process that strip down from anode, still contain certain impurity, need the later stage to carry out fragmentation, rinsing, abrasive dust processing to work in-process, aftertreatment has important impact for the performance of electrolytic manganese dioxide.In postprocessing working procedures, the step such as rinsing, abrasive dust is very crucial, also contains the impurity such as a certain amount of electrolytic solution and electrolytic solution evaporation suppressor in the Manganse Dioxide after fragmentation, and rinsing is that simple water cleans, the neutralization of NaOH alkali lye in traditional method, for removing Mn
2+and SO
4 2-the removal of impurity and part beavy metal impurity is not thorough, is difficult to obtain colory electrolytic manganese dioxide product.
At patent CN201110116976.1, Guangxi willow chemical industry discloses the production method that the present invention relates to a kind of electrolytic manganese dioxide, comprises the following steps: A prepares the mixed solution of thick manganous sulfate and ore pulp; B carries out neutralized ex iron to the solution of thick manganous sulfate and ore pulp; C carries out three deep purifying removal of impurities to thick manganese sulfate solution: comprise that primary purification is removed heavy metal, secondary-cleaned is removed trace element molybdenum, purified for three times and remove calcium sulfate and sal epsom; D electrolysis; E rinsing: rinsing is divided into: hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing; F abrasive dust; G blending, obtains electrolytic manganese dioxide product.This invention is usingd Low grade manganese ore and is prepared manganese sulfate solution as main raw material, manganese sulfate solution obtains highly purified electrolytic solution after deep purifying, the mercury-free alkaline battery of production high-performance respectively electrolysis special Manganse Dioxide and automobile power cell electrolysis special Manganse Dioxide under different electrolytic conditions, its post-processed for Manganse Dioxide comprises hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash, hot water rinsing, abrasive dust, the steps such as blending, the product performance that obtain are more superior, but Manganse Dioxide >=91.50% in its manganese dioxide product, Fe≤30 ppm, Cu≤3ppm, Pb≤5ppm, Ni≤3ppm, Co≤3ppm, Mo≤0.5ppm, As≤0.5ppm, Sb≤0.5ppm, K≤200ppm, and button cell is more and more higher for the purity requirement of Manganse Dioxide at present, especially for Fe, the content of Pb, manganese dioxide product particle all once.
Summary of the invention
The object of the invention is to overcome that existing battery electrolysis special manganese dioxide product process for refining exists that purification step is coarse, the problem such as product beavy metal impurity too high levels, product granularity homogeneity are poor, a kind of process for purification of electrolytic manganese dioxide product is provided.
The solution of the present invention is by such realization: a kind of process for purification of electrolytic manganese dioxide product, first the method takes out the related electrode of the Manganse Dioxide precipitate obtaining after electrolysing period, with hot-water soak, remove electrolytic solution and other foreign material of Manganse Dioxide precipitate surface attachment, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, this process for purification step also comprises:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 10mm-30mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 85-90 ℃, until the low 0.5g/L of sulfuric acid content is qualified in hot water; Weak base rinsing temperature is controlled at 50-54 ℃, and the time is 5-8 hour; Highly basic rinsing temperature is controlled at 50-60 ℃, when pH value reaches 7.0, stops highly basic rinsing; Hot water soda temperature is controlled as 90-95 ℃, and the time is 6-7 hour; Acid backwash temperature is controlled at 85-95 ℃, and the time is 1-2 hour; Last hot water rinsing temperature is controlled at 90-95 ℃, and the time is 4-10 hour, obtains the Manganse Dioxide after rinsing.
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 50-70 ℃ of condition, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 18-22 hour, obtains battery electrolysis special manganese dioxide product.
As further restriction of the present invention, in described rinsing, weak base is that volume content is 10%-17% ammoniacal liquor, and highly basic is that mass content is that 20 ~ 25% potassium hydroxide solutions or mass content are 20 ~ 25% lithium hydroxide solutions.
The know-why that the present invention realizes is: adopt powdery magnetic separation technology to carry out removal of impurities to final product, twice of the absorption powder on permanent magnet surface in the above products cleaning of 60 tons of every processing powdery magnetic separators, reduce fe and other detrimental impurity of sneaking in product, make the iron level in product reduce 5ppm-10ppm, Mo content reduces 0.5ppm, further reduces the foreign matter content of product.Adopt rocking sieve technology to carry out size-grade distribution control to final product, final product is after pulverizing mill speed governing, control air quantity are pulverized, then successively by 40 orders with 60 orders are rocking sieve sieves, coarse particles and other impurity fail by, sneaking into of coarse particles in minimizing powder and other nonmetallic impurity, guarantee the size-grade distribution homogenization of final product, guaranteed quality product.
The present invention possesses following good result:
(1) the present invention adopts six grades of rinsing processes, can remove preferably the sulfuric acid and the low price manganese that remain in electrolytic manganese dioxide, be adsorbed on calcium sulfate and the sal epsom on electrolytic manganese dioxide surface, more than improving the content to 93.5% of Manganse Dioxide in electrolytic manganese dioxide; And can control preferably electrolytic manganese dioxide product P H value, stabilized product quality, produces high-quality electrolytic manganese dioxide product.
(2) the present invention adopts powdery magnetic separation technology to carry out removal of impurities to final product, reduces fe and other detrimental impurity of sneaking in product, makes the iron level in product reduce 5ppm-10ppm, and Mo content reduces 0.5ppm, further reduces the foreign matter content of product.
(3) adopt rocking sieve technology to carry out size-grade distribution control to final product, sneaking into of the coarse particles in minimizing powder and other nonmetallic impurity, guarantees the size-grade distribution homogenization of final product, has guaranteed quality product.
Embodiment
Below in conjunction with embodiment, describe the process for purification of a kind of electrolytic manganese dioxide product of the present invention, these descriptions are not that content of the present invention is further limited.
Embodiment 1
First the related electrode of the Manganse Dioxide precipitate obtaining after electrolysing period is taken out, with hot-water soak, remove electrolytic solution and other foreign material of Manganse Dioxide precipitate surface attachment, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, then enter into following purification step:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 30mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 90 ℃, and directly in hot water, the low 0.5g/L of sulfuric acid content is qualified; Volume content is that 17% ammoniacal liquor weak base rinsing temperature is controlled at 54 ℃, and the time is 8 hours; Mass content is that 25% potassium hydroxide solution highly basic rinsing temperature is controlled at 60 ℃, when pH value reaches 7.0, stops highly basic rinsing; It is 95 ℃ that hot water soda temperature is controlled, and the time is 7 hours; Acid backwash temperature is controlled at 85 ℃, and the time is 2 hours; Last hot water rinsing temperature is controlled at 90 ℃, and the time is 10 hours, obtains the Manganse Dioxide after rinsing.
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 50 ℃ of conditions, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 18 hours, obtains battery electrolysis special manganese dioxide product.The product Manganse Dioxide content 93.50% that the present embodiment obtains, the content of the indexs such as impurity F e, Cu, Pb, Ni, Co, K, Na, Ca, Mg is low, Cu≤2ppm, Pb≤3ppm, Ni≤2ppm, Co≤2ppm, especially Fe, Mo reach respectively 30ppm, below 0.5ppm, finished particle degree-200 order 95%-99%,-325 order 70%-80%, and particle size distribution is concentrated, constant product quality high-quality.
Embodiment 2
First the related electrode of the Manganse Dioxide precipitate obtaining after electrolysing period is taken out, with hot-water soak, remove the electrolytic solution foreign material on Manganse Dioxide precipitate surface, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, then enter into following purification step:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 10mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 85 ℃, until the low 0.5g/L of sulfuric acid content is qualified in hot water; Volume content is that 10% ammoniacal liquor weak base rinsing temperature is controlled at 50 ℃, and the time is 5 hours; Mass content is that 20% lithium hydroxide solution highly basic rinsing temperature is controlled at 50 ℃, when pH value reaches 7.0, stops highly basic rinsing; It is 90 ℃ that hot water soda temperature is controlled, and the time is 6 hours; Acid backwash temperature is controlled at 85 ℃, and the time is 1 hour; Last hot water rinsing temperature is controlled at 95 ℃, and the time is 4 hours, obtains the Manganse Dioxide after rinsing.
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 70 ℃ of conditions, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 20 hours, obtains battery electrolysis special manganese dioxide product.
The product Manganse Dioxide content 93.00% that the present embodiment obtains, the content of the indexs such as impurity F e, Cu, Pb, Ni, Co, K, Na, Ca, Mg is low, Cu≤2ppm, Pb≤3ppm, Ni≤2ppm, Co≤2ppm, especially Fe, Mo reach respectively 30ppm, below 0.5ppm, finished particle degree-200 order 95%-99%,-325 order 70%-80%, and particle size distribution is concentrated, constant product quality high-quality.
Embodiment 3
First the related electrode of the Manganse Dioxide precipitate obtaining after electrolysing period is taken out, with hot-water soak, remove the electrolytic solution foreign material on Manganse Dioxide precipitate surface, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, then enter into following purification step:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 25mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 85 ℃, until the low 0.5g/L of sulfuric acid content is qualified in hot water; Volume content is that 15% ammoniacal liquor weak base rinsing temperature is controlled at 52 ℃, and the time is 6 hours; Mass content is that 20% potassium hydroxide solution highly basic rinsing temperature is controlled at 60 ℃, when pH value reaches 7.0, stops highly basic rinsing; It is 95 ℃ that hot water soda temperature is controlled, and the time is 7 hours; Acid backwash temperature is controlled at 95 ℃, and the time is 2 hours; Last hot water rinsing temperature is controlled at 90 ℃, and the time is 8 hours, obtains the Manganse Dioxide after rinsing.
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 60 ℃ of conditions, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 22 hours, obtains battery electrolysis special manganese dioxide product.
The product Manganse Dioxide content 93.50% that the present embodiment obtains, the content of the indexs such as impurity F e, Cu, Pb, Ni, Co, K, Na, Ca, Mg is low, Cu≤2ppm, Pb≤3ppm, Ni≤2ppm, Co≤2ppm, especially Fe, Mo reach respectively 30ppm, below 0.5ppm, finished particle degree-200 order 95%-99%,-325 order 70%-80%, and particle size distribution is concentrated, constant product quality high-quality.
Embodiment 4
First the related electrode of the Manganse Dioxide precipitate obtaining after electrolysing period is taken out, with hot-water soak, remove the electrolytic solution foreign material on Manganse Dioxide precipitate surface, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, then enter into following purification step:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 10mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 88 ℃, until the low 0.5g/L of sulfuric acid content is qualified in hot water; Volume content is that 13% ammoniacal liquor weak base rinsing temperature is controlled at 54 ℃, and the time is 6 hours; Mass content is that 22.5% lithium hydroxide solution highly basic rinsing temperature is controlled at 55 ℃, when pH value reaches 7.0, stops highly basic rinsing; It is 90 ℃ that hot water soda temperature is controlled, and the time is 6 hours; Acid backwash temperature is controlled at 90 ℃, and the time is 2 hours; Last hot water rinsing temperature is controlled at 95 ℃, and the time is 8 hours, obtains the Manganse Dioxide after rinsing.
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 55 ℃ of conditions, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 20 hours, obtains battery electrolysis special manganese dioxide product.
The product Manganse Dioxide content 92.50% that the present embodiment obtains, the content of the indexs such as impurity F e, Cu, Pb, Ni, Co, K, Na, Ca, Mg is low, Cu≤2ppm, Pb≤3ppm, Ni≤2ppm, Co≤2ppm, especially Fe, Mo reach respectively 30ppm, below 0.5ppm, finished particle degree-200 order 95%-99%,-325 order 70%-80%, and particle size distribution is concentrated, constant product quality high-quality.
The above embodiment of the present invention scheme is only can not limit the present invention to explanation of the present invention, in claim, pointed out the scope of product moiety of the present invention, component proportions, preparation method's parameter, and the scope of parameter of the present invention is not pointed out in above-mentioned explanation, therefore, in the implication suitable with claims of the present invention and any change in scope, be all considered to be in the scope that is included in claims.
The present invention is through multidigit electrolytic manganese dioxide process study personnel long term operation experience accumulation, and create by creative work, adopt six grades of rinsing processes, remove the sulfuric acid and the low price manganese that remain in electrolytic manganese dioxide, be adsorbed on calcium sulfate and the sal epsom on electrolytic manganese dioxide surface, improve the content to 93.5% of Manganse Dioxide in electrolytic manganese dioxide; And can control preferably electrolytic manganese dioxide product P H value, constant product quality; Adopt powdery magnetic separation technology to carry out removal of impurities to final product, reduce fe and other detrimental impurity of sneaking in product, make the iron level in product reduce 5ppm-10ppm, Mo content reduces 0.5ppm, further reduces the foreign matter content of product; Adopt rocking sieve technology to carry out size-grade distribution control to final product, sneaking into of the coarse particles in minimizing powder and other nonmetallic impurity, guarantees the size-grade distribution homogenization of final product, produces high-quality electrolytic manganese dioxide product.
Claims (2)
1. the process for purification of an electrolytic manganese dioxide product, first the method takes out the Manganse Dioxide precipitate obtaining through electrolysis together with electrode, with hot-water soak, remove electrolytic solution and other foreign material of Manganse Dioxide precipitate surface attachment, Manganse Dioxide precipitate is stripped down from electrode, obtain block Manganse Dioxide work in-process, it is characterized in that, this process for purification step also comprises:
A, rinsing neutralization: first Manganse Dioxide work in-process through being broken into the granularity of 10mm-30mm, then put into and in rinse tank, carry out rinsing, rinsing is divided into hot water wash acid, weak base rinsing, highly basic rinsing, hot water soda, diluted acid backwash and six steps of hot water rinsing, hot water wash acid temperature is controlled at 85-90 ℃, until the low 0.5g/L of sulfuric acid content is qualified in hot water; Weak base rinsing temperature is controlled at 50-54 ℃, and the time is 5-8 hour; Highly basic rinsing temperature is controlled at 50-60 ℃, when pH value reaches 7.0, stops highly basic rinsing; Hot water soda temperature is controlled as 90-95 ℃, and the time is 6-7 hour; Acid backwash temperature is controlled at 85-95 ℃, and the time is 1-2 hour; Last hot water rinsing temperature is controlled at 90-95 ℃, and the time is 4-10 hour, obtains the Manganse Dioxide after rinsing;
B, abrasive dust: the Manganse Dioxide after step a rinsing is dried and removed outer water under 50-70 ℃ of condition, according to required granularity, carry out abrasive dust, obtain powder Manganse Dioxide;
The powder Manganse Dioxide that c, magnetic separation: step b obtains is removed fe and other heavy metal through powdery magnetic separator, and 60 tons of products of every processing are cleared up the permanent magnet surface attachments of twice powdery magnetic separator, obtain the low impurity Manganse Dioxide powder after magnetic separation;
The low impurity Manganse Dioxide powder that d, screening: step c obtains is through 40 rocking sieve orders and the screening of 60 eye mesh screens, and coarse particles turns back in pulverizing mill, and other impurity discards, and obtains the Manganse Dioxide powder of particle homogeneous;
E, blending: the Manganse Dioxide powder that steps d is obtained, adopt Dense Phase Pneumatic Conveying mode to be transported to gravity mixing storehouse and carry out blending, the blending time is 18-22 hour, obtains battery electrolysis special manganese dioxide product.
2. the process for purification of a kind of electrolytic manganese dioxide product according to claim 1, it is characterized in that, in described rinsing, weak base is that volume content is 10%-17% ammoniacal liquor, and highly basic is that mass content is that 20 ~ 25% potassium hydroxide solutions or mass content are 20 ~ 25% lithium hydroxide solutions.
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Cited By (6)
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| CN104773761A (en) * | 2015-04-15 | 2015-07-15 | 广西埃赫曼康密劳化工有限公司 | Calcium removal method of electrolytic manganese dioxide |
| CN111632940A (en) * | 2020-06-02 | 2020-09-08 | 广西汇元锰业有限责任公司 | Post-treatment rinsing method for electrolytic manganese dioxide |
| CN112601716A (en) * | 2018-08-20 | 2021-04-02 | 株式会社田中化学研究所 | Method for producing purified lithium compound and method for producing lithium transition metal composite oxide |
| CN113289765A (en) * | 2021-04-20 | 2021-08-24 | 广西下田锰矿有限责任公司 | Impurity removal method and device for electrolytic manganese dioxide |
| CN114634207A (en) * | 2022-03-17 | 2022-06-17 | 广西下田锰矿有限责任公司 | Rinsing and drying process and crushing and drying device for electrolytic manganese dioxide powder |
| WO2022205535A1 (en) * | 2021-03-31 | 2022-10-06 | 广西桂柳化工有限责任公司 | Method for preparing electrolytic manganese dioxide for producing lithium manganate material |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773761A (en) * | 2015-04-15 | 2015-07-15 | 广西埃赫曼康密劳化工有限公司 | Calcium removal method of electrolytic manganese dioxide |
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| CN112601716A (en) * | 2018-08-20 | 2021-04-02 | 株式会社田中化学研究所 | Method for producing purified lithium compound and method for producing lithium transition metal composite oxide |
| CN111632940A (en) * | 2020-06-02 | 2020-09-08 | 广西汇元锰业有限责任公司 | Post-treatment rinsing method for electrolytic manganese dioxide |
| WO2022205535A1 (en) * | 2021-03-31 | 2022-10-06 | 广西桂柳化工有限责任公司 | Method for preparing electrolytic manganese dioxide for producing lithium manganate material |
| CN113289765A (en) * | 2021-04-20 | 2021-08-24 | 广西下田锰矿有限责任公司 | Impurity removal method and device for electrolytic manganese dioxide |
| CN113289765B (en) * | 2021-04-20 | 2023-09-22 | 广西下田锰矿有限责任公司 | Impurity removing method and device for electrolytic manganese dioxide |
| CN114634207A (en) * | 2022-03-17 | 2022-06-17 | 广西下田锰矿有限责任公司 | Rinsing and drying process and crushing and drying device for electrolytic manganese dioxide powder |
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Application publication date: 20140212 |