CN102136583A - Regeneration method of zinc powder as negative electrode material of waste alkaline zinc-manganese dioxide battery - Google Patents
Regeneration method of zinc powder as negative electrode material of waste alkaline zinc-manganese dioxide battery Download PDFInfo
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Abstract
The invention discloses a method for regenerating a waste alkaline zinc-manganese dioxide battery cathode material zinc powder. The method comprises the following steps: (1) separating and extracting a negative electrode material; (2) Soaking the negative electrode material in dilute hydrochloric acid or strong base solution at room temperature to obtain a mixture; (3) Filtering the mixture, and recovering insoluble substances to obtain filtrate; (4) Adding polyalcohol surfactant into the filtrate, adjusting the filtrate into electrolyte, electrolyzing at 20-50 ℃, and separating out zinc powder at a cathode; (5) Scraping zinc powder precipitated on the cathode every 10-30 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting zinc ions in the electrolyte to the initial concentration; and cleaning and drying the scraped zinc powder to obtain recovered zinc powder. The invention has simple process, convenient operation and low production cost; the AA battery assembled by the regenerated zinc powder has the performance reaching the national standard, and can also solve the problems of environmental pollution and excessive development of mineral resources of the waste alkali-manganese battery.
Description
Technical Field
The invention belongs to the field of environmental protection and resource regeneration application, and particularly relates to a regeneration method of a waste alkaline zinc-manganese dioxide battery cathode material zinc powder.
Background
Due to the rapid development of the electronic industry and the increasing awareness of environmental protection, higher requirements are put on the performance of batteries. Compared with the common battery, the alkaline zinc-manganese battery has the following advantages: (1) the capacity is large and is about 3 to 8 times of that of a common battery; (2) the curve is stable under the conditions of high power and large current discharge; (3) the resource utilization rate is high, and the cost performance of the battery is improved; (4) the low pollution, the realization of the advantages of complete mercury-free and the like, so the alkaline zinc-manganese battery becomes the mainstream of the global primary battery production and consumption. Particularly, in the last decade, the difference between the average quality level of alkaline zinc-manganese batteries in China and the foreign countries is smaller and smaller, and some alkaline zinc-manganese batteries reach the advanced foreign level. According to the prediction of the industry, in 2010, the yield of the alkaline zinc-manganese battery in China reaches 180 hundred million, and accounts for 1/3 of the yield of the alkaline zinc-manganese battery in the world. Therefore, china is a large country for producing and consuming alkaline zinc-manganese batteries.
With the deepening of people's social understanding of sustainable development and resource-saving and environment-friendly, the mass production and consumption of alkaline zinc-manganese batteries pose serious challenges to the ' green world '. A large amount of waste batteries are discarded at will, which causes serious harm to the environment. Meanwhile, a large amount of waste batteries are discarded at will, so that serious waste of non-renewable natural resources such as zinc, manganese and the like is caused. Therefore, the recovery and regeneration of the electrode material zinc in the waste batteries are of no self-evident importance in reducing the battery cost and realizing the recycling of mineral resources, and have important significance for the sustainable development of economy and 'green batteries'.
At present, the recycling of the zinc of the cathode material of the waste zinc-manganese battery is mainly carried out by the following methods: (1) Taking out the electrode material, dissolving in acidic solution under proper condition, and extracting by increasing the leaching rate of zincHigh recovery of zinc; for example, patent CN87102008 "method for extracting manganese dioxide and zinc from waste zinc-manganese dry cell"; (2) Crushing waste batteries, dissolving to prepare electrolyte, and preparing a metal compound through electrolysis, filtration and recrystallization; for example, patent CN03111163.7 "method for producing metal compounds by using waste zinc-manganese dry batteries"; the disadvantages of the above method are complex operation, large energy consumption and high equipment cost; (3) Zn, mn, cu and the like in the waste batteries are necessary trace elements for crops, and the waste batteries can be used for directly preparing ZnSO 4 And MnSO 4 The micro-element fertilizer is, for example, the document "development of organic micro-element fertilizer by using waste alkaline manganese battery and fertilizer efficiency test". It can be seen that the existing methods can not directly regenerate the zinc of the cathode material.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method for regenerating a negative electrode material zinc powder of a waste alkaline zinc-manganese dioxide battery.
The purpose of the invention is realized by the following technical scheme: a regeneration method of a waste alkaline zinc-manganese dioxide battery cathode material zinc powder comprises the following operation steps:
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out a negative electrode material (mainly comprising zinc and zinc oxide);
(2) Leaching: soaking the negative electrode material taken out in the step (1) in dilute hydrochloric acid or strong alkali solution for 1-2 h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) Electrolyzing to prepare zinc powder: adjusting the filtrate obtained in the step (3) into electrolyte, adding polyalcohol surfactant, and electrolyzing at 20-50 ℃ with the cathode current density of 10-30A/dm 2 Zinc powder is precipitated at the cathode;
(5) Scraping zinc powder precipitated on a cathode every 10-30 minutes, adding the filtrate obtained in the step (3) into the electrolyte, and adjusting zinc ions in the electrolyte to an initial concentration; and cleaning and drying the scraped zinc powder to obtain recovered zinc powder.
Soaking the negative electrode material in the step (2) in dilute hydrochloric acid to obtain a mixture, wherein the mixture comprises the following components in percentage by weight:
40 percent of negative electrode material
HCl 10％
50% of water.
Soaking the negative electrode material in the step (2) in a strong alkali solution to obtain a mixture, wherein the mixture comprises the following components in percentage by weight:
the negative electrode material is 10%
Strong alkali 20%
70% of water;
the strong base is sodium hydroxide or potassium hydroxide.
And (5) when the filtrate obtained in the step (4) is acidic, adjusting the concentration of zinc ions to 0.4-0.7M, and adjusting the pH value to 5-6.
The pH is adjusted by ammonia water.
When the filtrate obtained in the step (4) is alkaline, the concentration of zinc ions is adjusted to be 0.1-0.4M, and the molar ratio of strong base to zinc ions is 3: 1-15: 1.
The addition amount of the polyalcohol surfactants in the step (4) is 0.2-1% of the mass of the electrolyte.
The cathode current density in the step (4) is 10-30A/dm 2 。
And (5) adopting a stainless steel plate or a zinc plate as a cathode and graphite, a platinum plate, a titanium plate, a stainless steel plate or a nickel-plated iron plate as an anode for electrolysis in the step (4).
Compared with the prior art, the invention has the following advantages and effects: the invention has the advantages of simple process, convenient operation, low production cost and the like; the performance of the AA battery assembled by the regenerated zinc powder reaches the national standard. In the whole production process, the process is simple, the economic benefit is good, the problems of environmental pollution and excessive development of mineral resources of the waste alkaline manganese batteries can be solved, and the sustainable development of the society is facilitated.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
(1) Separating and extracting the negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in dilute hydrochloric acid for 1h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of a negative electrode material, 10% of HCl and 50% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.4m, ph =6; introducing the adjusted leachate into an electrolytic tank, adding 0.2 percent of polyalcohol surfactant, taking the anode as graphite and the cathode plate as a stainless steel plate, and electrolyzing at 20-50 ℃ with the cathode current density of 15A/dm 2 Zinc powder is precipitated at the cathode;
(5) Scraping the zinc powder separated out from the cathode every 25 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting the zinc ions in the electrolyte to the initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.58V; and (5) placing between 10 omega: 12.6h;3.9 Ω interval: 4.52h;1.8 Ω pulse: 330 times; 43 omega interval: and (4) 63.1h.
Example 2
(1) Separating and extracting the negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in dilute hydrochloric acid for 1h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of a negative electrode material, 10% of HCl and 50% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]Was 0.5m, ph =5; introducing the adjusted leachate into an electrolytic tank, adding 0.5 percent of polyalcohol surfactant, taking an anode as a platinum plate and a cathode plate as a zinc plate, and electrolyzing at 20-50 ℃ with the cathode current density of 15A/dm 2 Zinc powder is separated out at the cathode;
(5) Scraping zinc powder separated out from the cathode every 15 minutes, adding the filtrate obtained in the step (3) into the electrolyte, and adjusting zinc ions in the electrolyte to an initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.58V; and (3) 10 omega spacing: 12.8h;3.9 Ω interval: 4.61h;1.8 Ω pulse: 350 times; 43 omega interval: and (4) 63.7h.
Example 3
Example 2
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the negative electrode material taken out in the step (1) in dilute hydrochloric acid for 2 hours at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of a negative electrode material, 10% of HCl and 50% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]Is 0.7m,ph =5; introducing the adjusted leachate into an electrolytic bath, adding 1% of polyalcohol surfactant, taking an anode as a titanium plate and a cathode plate as a stainless steel plate, and electrolyzing at 20-50 ℃ with the cathode current density of 20A/dm 2 Zinc powder is separated out at the cathode;
(5) Scraping zinc powder separated out from the cathode every 10 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting zinc ions in the electrolyte to an initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.58V; and (3) 10 omega spacing: 12.6h;3.9 Ω interval: 4.87h;1.8 Ω pulse: 375 times; 43 omega interval: and (4) 63.9h.
Example 4
(1) Separating and extracting the negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the cathode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in dilute hydrochloric acid for 2 hours at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of a negative electrode material, 10% of HCl and 50% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) Electrolyzing to prepare zinc powder:adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.6m, ph =6; introducing the adjusted leachate into an electrolytic bath, adding 0.8% of polyalcohol surfactant, electrolyzing at 20-50 ℃ with an anode of graphite and a cathode of zinc plate as zinc plates, wherein the cathode current density is 20A/dm 2 Zinc powder is separated out at the cathode;
(5) Scraping zinc powder separated out from the cathode every 10 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting zinc ions in the electrolyte to an initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.59V; and (5) placing between 10 omega: 12.3h;3.9 Ω interval: 4.97h;1.8 Ω pulse: 404 times; and 43 omega are spaced: and (5) the time is 61.5h.
Example 5
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the negative electrode material taken out in the step (1) in a sodium hydroxide solution for 2 hours at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of negative electrode material, 20% of sodium hydroxide and 70% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.1M, and the molar ratio of sodium hydroxide to zinc ions is 15: 1; introducing the adjusted leachate into an electrolytic bath, and adding polyalcohol surfactant0.2 percent of agent, taking the anode as nickel-plating iron and the cathode plate as a stainless steel plate, electrolyzing at the temperature of 20-50 ℃, and taking the cathode current density as 10A/dm 2 Zinc powder is precipitated at the cathode;
(5) Scraping the zinc powder separated out from the cathode every 20 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting the zinc ions in the electrolyte to the initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.56V; and (3) 10 omega spacing: 12.3h;3.9 Ω interval: 4.59h;1.8 Ω pulse: 381 times; 43 omega interval: and (4) 63.2h.
Example 6
(1) Separating and extracting the negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in a potassium hydroxide solution for 2 hours at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of negative electrode material, 20% of potassium hydroxide and 70% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.2M, and the molar ratio of potassium hydroxide to zinc ions is 10: 1; introducing the adjusted leachate into an electrolytic bath, adding 0.4% of polyalcohol surfactant, and electrolyzing at 20-50 deg.C with cathode current density of 30A/dm by using anode as stainless steel plate and cathode as stainless steel plate 2 Zinc powder is separated out at the cathode;
(5) Scraping the zinc powder separated out from the cathode every 30 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting the zinc ions in the electrolyte to the initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.59V; and (3) 10 omega spacing: 12.6h;3.9 Ω spacing: 4.88h;1.8 Ω pulse: 375 times; and 43 omega are spaced: and (4) 62.9h.
Example 7
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in a potassium hydroxide solution for 1h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of negative electrode material, 20% of potassium hydroxide and 70% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) Electrolyzing to prepare zinc powder: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.3M, and the molar ratio of potassium hydroxide to zinc ions is 6: 1; introducing the adjusted leachate into an electrolytic tank, adding 0.8% of polyalcohol surfactant, electrolyzing at 20-50 ℃ by taking an anode as graphite and a cathode plate as a stainless steel plate and taking the cathode current density as 20A-dm 2 Zinc powder is separated out at the cathode;
(5) Scraping the zinc powder separated out from the cathode every 20 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting the zinc ions in the electrolyte to the initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.58V; and (5) placing between 10 omega: 13.1h;3.9 Ω interval: 4.91h;1.8 Ω pulse: 381 times; and 43 omega are spaced: and (4) 61.7h.
Example 8
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the cathode material;
(2) Leaching: soaking the cathode material taken out in the step (1) in a potassium hydroxide solution for 1h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture; the mixture consists of the following components in percentage by weight: 40% of negative electrode material, 20% of potassium hydroxide and 70% of water;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) And (3) electrolytic zinc powder preparation: adjusting the filtrate obtained in the step (3) into electrolyte to ensure that [ Zn ] 2+ ]0.4M, and the molar ratio of potassium hydroxide to zinc ions is 3: 1; introducing the adjusted leachate into an electrolytic bath, adding 1% of polyalcohol surfactant, taking an anode as a titanium plate and a cathode plate as a stainless steel plate, and electrolyzing at 20-50 ℃ with the cathode current density of 20A/dm 2 Zinc powder is separated out at the cathode;
(5) Scraping the zinc powder separated out from the cathode every 10 minutes, adding the filtrate obtained in the step (3) into the electrolyte and adjusting the zinc ions in the electrolyte to the initial concentration; and cleaning and vacuum drying the scraped zinc powder to obtain the recovered zinc powder.
The recovered zinc powder obtained in the embodiment is combined with other negative electrode materials (the negative electrode materials comprise, by weight, 58.97% of zinc powder, 0.5% of sodium polyacrylate, 0.5% of sodium carboxymethylcellulose, 0.03% of indium hydroxide and 40% of potassium hydroxide) to assemble an AA battery, and the performance of the AA battery reaches the national standard: open circuit voltage: 1.58V; and (3) 10 omega spacing: 12.7h;3.9 Ω interval: 4.85h;1.8 Ω pulse: 397 times; and 43 omega are spaced: and (4) 62.1h.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (9)
1. A regeneration method of a waste alkaline zinc-manganese dioxide battery negative electrode material zinc powder is characterized by comprising the following operation steps:
(1) Separating and extracting a negative electrode material: splitting the shell of the waste alkaline zinc-manganese dioxide battery by a mechanical method, and taking out the negative electrode material;
(2) Leaching: soaking the negative electrode material taken out in the step (1) in dilute hydrochloric acid or strong alkali solution for 1-2 h at room temperature, and continuously stirring and accelerating dissolution during the soaking period to obtain a mixture;
(3) Isolation of zinc salt or zincate: filtering the mixture obtained in the step (2), and recovering insoluble substances to obtain filtrate;
(4) Electrolyzing to prepare zinc powder: adjusting the filtrate obtained in the step (3) into electrolyte, adding polyalcohol surfactant, and electrolyzing at 20-50 ℃ with the cathode current density of 10-30A/dm 2 Zinc powder is precipitated at the cathode;
(5) Scraping zinc powder precipitated on the cathode every 10-30 minutes, adding the filtrate obtained in the step (3) into the electrolyte, and adjusting zinc ions in the electrolyte to an initial concentration; and cleaning and drying the scraped zinc powder to obtain the recovered zinc powder.
2. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, is characterized in that: soaking the negative electrode material in the step (2) in dilute hydrochloric acid to obtain a mixture, wherein the mixture comprises the following components in percentage by weight:
40 percent of negative electrode material
HCl 10％
And 50% of water.
3. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, is characterized in that: soaking the negative electrode material in the step (2) in a strong alkali solution to obtain a mixture, wherein the mixture comprises the following components in percentage by weight:
the negative electrode material is 10%
Strong alkali 20%
70% of water;
the strong base is sodium hydroxide or potassium hydroxide.
4. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, which is characterized in that: and (4) when the filtrate obtained in the step (4) is acidic, adjusting the concentration of zinc ions to 0.4-0.7M, and adjusting the pH value to 5-6.
5. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 4, is characterized in that: the pH is adjusted by ammonia water.
6. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, is characterized in that: when the filtrate obtained in the step (4) is alkaline, the concentration of zinc ions is adjusted to be 0.1-0.4M, and the molar ratio of strong base to zinc ions is 3: 1-15: 1.
7. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, is characterized in that: the addition amount of the polyalcohol surfactants in the step (4) is 0.2-1% of the mass of the electrolyte.
8. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, which is characterized in that: the cathode current density in the step (4) is 10-30A/dm 2 。
9. The method for regenerating the negative electrode material zinc powder of the waste alkaline zinc-manganese dioxide battery as claimed in claim 1, is characterized in that: and (4) adopting a stainless steel plate or a zinc plate as a cathode and graphite, a platinum plate, a titanium plate, a stainless steel plate or a nickel-plated iron plate as an anode for electrolysis.
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Cited By (3)
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| CN104505525A (en) * | 2014-12-17 | 2015-04-08 | 华东师范大学 | Method for preparing nano zinc powder by using waste zinc-manganese battery |
| CN108808033A (en) * | 2018-06-01 | 2018-11-13 | 南京信息工程大学 | Method for preparing electrode material of supercapacitor by using waste zinc-manganese battery |
| RU2763076C1 (en) * | 2021-09-01 | 2021-12-27 | Общество с ограниченной ответственностью «Технологии Вторичных Металлов» | Method for processing waste salt and alkaline batteries |
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| CN104505525A (en) * | 2014-12-17 | 2015-04-08 | 华东师范大学 | Method for preparing nano zinc powder by using waste zinc-manganese battery |
| CN108808033A (en) * | 2018-06-01 | 2018-11-13 | 南京信息工程大学 | Method for preparing electrode material of supercapacitor by using waste zinc-manganese battery |
| RU2763076C1 (en) * | 2021-09-01 | 2021-12-27 | Общество с ограниченной ответственностью «Технологии Вторичных Металлов» | Method for processing waste salt and alkaline batteries |
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Application publication date: 20110727 |