CN114212763B - Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal - Google Patents

Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal Download PDF

Info

Publication number
CN114212763B
CN114212763B CN202111551079.3A CN202111551079A CN114212763B CN 114212763 B CN114212763 B CN 114212763B CN 202111551079 A CN202111551079 A CN 202111551079A CN 114212763 B CN114212763 B CN 114212763B
Authority
CN
China
Prior art keywords
precipitation
solution
iron
chromium
waste liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111551079.3A
Other languages
Chinese (zh)
Other versions
CN114212763A (en
Inventor
杨勇
陈发明
韦勇明
严超
闭伟宁
李建军
黄冠汉
黄麒优
罗昌璃
廖英欢
陈远光
李世媛
黄炳龙
谢彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanfang Manganese Industry Group Co ltd
Daxin Manganese Mine Branch Of Nanfang Manganese Industry Group Co ltd
Original Assignee
Nanfang Manganese Industry Group Co ltd
Daxin Manganese Mine Branch Of Nanfang Manganese Industry Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanfang Manganese Industry Group Co ltd, Daxin Manganese Mine Branch Of Nanfang Manganese Industry Group Co ltd filed Critical Nanfang Manganese Industry Group Co ltd
Priority to CN202111551079.3A priority Critical patent/CN114212763B/en
Publication of CN114212763A publication Critical patent/CN114212763A/en
Application granted granted Critical
Publication of CN114212763B publication Critical patent/CN114212763B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/37—Phosphates of heavy metals
    • C01B25/375—Phosphates of heavy metals of iron
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals
    • C23F3/06—Heavy metals with acidic solutions
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a recycling method of cathode plate polishing waste liquid for electrolytic manganese metal, which comprises the following steps: s1, reducing agent is used for reducing Cr in polishing waste liquid or diluted polishing waste liquid 6+ 、Fe 3+ Reduction to Cr 3+ 、Fe 2+ Obtaining chromium precipitation precursor solution; s2, taking a chromium precipitation front solution, adjusting the pH value to 3.5-3.8, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed; s3, taking a chromium-precipitation solution, adding an oxidant until ferrous iron is completely oxidized into ferric iron, adjusting pH to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the iron-precipitation solution. The invention can effectively separate iron and chromium, and realize comprehensive recovery treatment of the manganese metal polishing waste liquid.

Description

Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal
Technical Field
The invention relates to the technical field of cathode plate treatment in an electrolytic manganese metal plant, in particular to a resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal.
Background
The electrolytic manganese metal cathode plate is made of 316L stainless steel plates, and the 316L stainless steel plates comprise the following main chemical components: less than or equal to 0.03 percent of C, less than or equal to 1.00 percent of Si, less than or equal to 2.00 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.03 percent of S, 12.0 to 15.0 percent of Ni, 16.0 to 18.0 percent of Cr and 2.0 to 3.0 percent of Mo. At present, the cathode plate polishing treatment process of an electrolytic manganese metal factory mainly comprises the steps of immersing the cathode plate in a mixture of phosphoric acid and concentrated sulfuric acid, synchronously introducing direct current to remove residues on the cathode plate, and rapidly reducing the polishing treatment effect after a certain polishing period, wherein the polishing solution is required to be replaced again, and the replaced polishing solution is polishing waste liquid containing a large amount of Fe, cr, ni, mn metal impurities.
At present, the treatment of the polishing waste liquid is simply and harmlessly carried out on Cr and Ni harmful impurities in the polishing waste liquid, and effective recycling of valuable metals in the polishing waste liquid is not realized, so that the research on the recycling treatment process of the polishing waste liquid is carried out, a method for effectively separating three substances of iron, chromium and nickel is sought, and finally, the comprehensive recycling treatment of the manganese metal polishing waste liquid is very necessary.
Disclosure of Invention
The invention provides a resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal, which can effectively separate iron and chromium and realize comprehensive recovery treatment of manganese metal polishing waste liquid.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a recycling method of cathode plate polishing waste liquid for electrolytic manganese metal comprises the following steps:
s1, reducing agent is used for reducing Cr in polishing waste liquid or diluted polishing waste liquid 6+ 、Fe 3+ Reduction to Cr 3+ 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.5-3.8, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed;
s3, taking a chromium-precipitation solution, adding an oxidant until ferrous iron is completely oxidized into ferric iron, adjusting pH to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the iron-precipitation solution.
And S4, taking the iron-precipitating solution, adjusting the pH value to 7-10 until no sediment is generated, separating sediment and clear solution, and recycling the clear solution as polishing waste liquid diluent.
Further, the iron-containing precipitate is washed by acid liquor with the pH value of 1-3 and the solid-liquid ratio of 1-5:1, and the iron phosphate product is obtained after washing.
Preferably, in the step S1, the reducing agent is iron.
Preferably, in the step S3, the oxidizing agent is a liquid oxidizing agent.
Preferably, in the step S3, the oxidizing agent is hydrogen peroxide.
Preferably, in the step S2, the pH is adjusted to 3.8.
Preferably, in the step S1, the amount of the reducing agent is 1.0 to 2.5 times the theoretical amount.
Preferably, in the step S3, the pH is adjusted to < 3. More preferably, in the step S3, the pH is adjusted to 2.75.
The acid used for adjusting the acidity can be sulfuric acid, phosphoric acid or hydrochloric acid, and the sulfuric acid is more economical and environment-friendly.
The method for recycling the cathode plate polishing waste liquid for the electrolytic manganese metal comprises the steps of firstly utilizing a reducing agent to treat Cr in the polishing waste liquid 6+ 、Fe 3+ Reduction to Cr 3+ 、Fe 2+ Reuse of CrPO 4 、Fe 3 (PO 4 ) 2 Precipitation of fractions from solution due to differences in pH in the precipitation rangeSeparating out Cr 3+ Then the pH value is adjusted back to 2 by acid, and Fe in the solution is adjusted to be 2+ Oxidation to Fe with Hydrogen peroxide 3+ Then, with PO in solution 4 3- Formation of FePO 4 And (3) precipitating to finally realize Cr and Fe separation and recovery.
After Cr and Fe are recovered, the pH value can be regulated to 7.5-8.5 by alkali, iron, chromium and nickel are completely precipitated and separated, and finally the treated liquid is recycled as polishing waste liquid diluent.
According to the method disclosed by the invention, the color of the iron phosphate product obtained by adjusting the pH value is white, the color is bright, and after the iron phosphate product is washed for 1 time or a plurality of times, the iron content is more than 26%, so that the quality requirement of the industrial grade iron phosphate product is met.
Detailed Description
The present invention is further illustrated below with reference to specific examples, but the scope of the present invention is not limited to the following examples.
Diluting 2L of polishing waste liquid by 10 times, wherein the amounts of substances in the diluted polishing waste liquid are as follows:
TABLE 1 amounts of substances in the dilutions
Figure BDA0003417218210000021
The subsequent examples used the diluted polishing waste liquid described above.
Example 1
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
TABLE 2 amount of each substance in the chromium precipitation precursor solution
Figure BDA0003417218210000022
S2, taking a chromium precipitation front solution, regulating the pH value to 3.8 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 3 amounts of substances in the solution after chromium precipitation
Figure BDA0003417218210000031
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.75 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 4 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000032
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 5 amounts of substances in the clear solution
Figure BDA0003417218210000033
Example 2
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.7 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 6 amount of each substance in the solution after chromium precipitation
Figure BDA0003417218210000034
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.75 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 7 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000035
S4, taking the solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 7.5, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as polishing waste liquid diluent.
TABLE 8 amounts of substances in the clear solution
Figure BDA0003417218210000041
Example 3
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.8 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
s3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.5 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 9 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000042
S4, taking the solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.5, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as polishing waste liquid diluent.
TABLE 10 amounts of substances in the clear solution
Figure BDA0003417218210000043
Example 4
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.6 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 11 amounts of substances in the solution after chromium precipitation
Figure BDA0003417218210000044
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.50 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 12 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000051
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 13 amounts of substances in the clear solution
Figure BDA0003417218210000052
Example 5
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.5 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 14 amounts of substances in the solution after chromium precipitation
Figure BDA0003417218210000053
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.25 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 15 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000054
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 16 amounts of substances in the clear solution
Figure BDA0003417218210000055
Example 6
Taking the iron-containing precipitate generated in the embodiment 1, and washing the iron-containing precipitate by adopting acid liquor, wherein the main component of the iron-containing precipitate is ferric phosphate, the pH value of the acid liquor is 2.5, the acid liquor is sulfuric acid, and the solid-liquid volume ratio is 2: and 1, washing out impurities in the ferric phosphate.
TABLE 17 content of substances in iron phosphate product
Figure BDA0003417218210000061
As can be seen from Table 17, the iron content of the unwashed iron phosphate product was also less than 26%, and the iron content was greater than 26% for 1 wash or more washes, to meet quality requirements.
Comparative example 1
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.9 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 18 amounts of substances in the solution after chromium precipitation
Figure BDA0003417218210000062
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.75 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 19 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000063
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 5 amounts of substances in the clear solution
Figure BDA0003417218210000064
Figure BDA0003417218210000071
Comparative example 2
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction ofCr formation 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 4.0 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
TABLE 20 amount of each substance in the solution after chromium precipitation
Figure BDA0003417218210000072
S3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.75 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 21 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000073
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 22 amounts of substances in the clear solution
Figure BDA0003417218210000074
As can be seen from comparative examples 1 and 2, the Fe concentration starts to decrease significantly after pH >3.8, so that the iron content in the chromium-containing precipitate increases and the recovered iron phosphate product decreases, so that the solution is suitably chosen for ph=3.8 when it is reacted. If the pH is increased again, the reduction in iron will be much greater than the reduction in chromium, while if the pH is decreased, the chromium content will increase.
Comparative example 3
S1, taking 2L of diluted polishing waste liquid, adding 8.5g of iron powder, reacting for 3 hours at normal temperature, and waiting for Cr 6+ 、Fe 3+ Reduction to Cr 3 + 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, regulating the pH value to 3.8 by sulfuric acid, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed, wherein the amounts of substances in the chromium precipitation rear solution are as follows:
s3, taking a chromium-precipitation solution, adding hydrogen peroxide until ferrous iron is completely oxidized into ferric iron, regulating the pH value to 2.75 by sulfuric acid to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate and the solution after iron precipitation.
TABLE 23 amounts of substances in the solution after iron precipitation
Figure BDA0003417218210000081
When the pH value is more than or equal to 3, the iron precipitating solution is turbid, and the color and purity of the generated ferric phosphate are affected.
S4, taking a solution after iron precipitation, adding quicklime to enable the pH value of the solution to be 8.0, reacting for 8 hours at normal temperature, completely precipitating, separating precipitate and clear liquid, and recycling the clear liquid as a polishing waste liquid diluent.
TABLE 24 amounts of substances in the clear solution
Figure BDA0003417218210000082

Claims (7)

1. The method for recycling the cathode plate polishing waste liquid for the electrolytic manganese metal is characterized by comprising the following steps of:
s1, reducing agent is used for reducing Cr in polishing waste liquid or diluted polishing waste liquid 6+ 、Fe 3+ Reduction to Cr 3+ 、Fe 2+ Obtaining chromium precipitation precursor solution;
s2, taking a chromium precipitation front solution, adjusting the pH value to 3.5-3.8, and separating a chromium-containing precipitate and a chromium precipitation rear solution after the precipitation is completed;
s3, taking a chromium-precipitation solution, adding an oxidant until ferrous iron is completely oxidized into ferric iron, adjusting pH to generate ferric phosphate precipitate, and separating the ferric phosphate precipitate from the iron-precipitation solution;
s4, taking a solution after iron precipitation, adjusting the pH value to 7-10 until no sediment is generated any more, separating sediment and clear liquid, wherein the clear liquid is used as a polishing waste liquid diluent for recycling;
in the step S1, the reducing agent is iron;
in the step S3, the pH is adjusted to < 3.
2. The method according to claim 1, characterized in that:
washing the iron-containing precipitate with acid liquor with the pH value of 1-3 and the solid-liquid ratio of 1-5:1, and obtaining the iron phosphate product after washing.
3. The method according to claim 1, characterized in that:
in the step S3, the oxidizing agent is a liquid oxidizing agent.
4. A method according to claim 1 or 3, characterized in that:
in the step S3, the oxidizing agent is hydrogen peroxide.
5. The method according to claim 1, characterized in that:
in the step S2, the pH is adjusted to 3.8.
6. The method according to claim 1, characterized in that:
in the step S1, the consumption of the reducing agent is 1.0-2.5 times of the theoretical consumption.
7. The method according to claim 1, characterized in that:
in the step S3, the pH is adjusted to 2.75.
CN202111551079.3A 2021-12-17 2021-12-17 Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal Active CN114212763B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111551079.3A CN114212763B (en) 2021-12-17 2021-12-17 Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111551079.3A CN114212763B (en) 2021-12-17 2021-12-17 Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal

Publications (2)

Publication Number Publication Date
CN114212763A CN114212763A (en) 2022-03-22
CN114212763B true CN114212763B (en) 2023-06-16

Family

ID=80703530

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111551079.3A Active CN114212763B (en) 2021-12-17 2021-12-17 Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal

Country Status (1)

Country Link
CN (1) CN114212763B (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103014340B (en) * 2013-01-10 2014-06-25 北京矿冶研究总院 Selective separation method for chromium and iron in sulfuric acid system solution
CN107522324B (en) * 2017-10-23 2020-10-13 贵州松桃金瑞锰业有限责任公司 Process for recovering manganese in electrolytic manganese production wastewater and comprehensively treating wastewater and waste gas
CN108706844A (en) * 2018-05-29 2018-10-26 重庆太锦环保科技有限公司 Iron, chromium, the separation and recovery method of aluminium and its application in more metal hazardous wastes
CN110482512A (en) * 2019-07-12 2019-11-22 乳源东阳光磁性材料有限公司 A kind of preparation method of battery-grade iron phosphate
CN111153519B (en) * 2019-12-27 2022-03-29 江苏永葆环保科技有限公司 Method for separating ferrochromium from chromium-containing pickling waste liquid
CN111455168B (en) * 2020-04-22 2021-09-28 宝武集团环境资源科技有限公司 Treatment method of chromium-containing wastewater
CN113247877A (en) * 2021-05-27 2021-08-13 广西锰华新能源科技发展有限公司 Method for preparing battery-grade iron phosphate and manganese phosphate from manganese ore leaching residues

Also Published As

Publication number Publication date
CN114212763A (en) 2022-03-22

Similar Documents

Publication Publication Date Title
CN101838736B (en) Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system
CN111153519B (en) Method for separating ferrochromium from chromium-containing pickling waste liquid
CN101818250A (en) Method for processing cobalt-copper-iron alloy
RU2769875C2 (en) Method for producing raw materials for leaching
CN111304444B (en) Treatment method for separating and recovering copper, iron, zinc, nickel and chromium from chromium-containing sludge
CN113955733B (en) Method for preparing ferric phosphate by utilizing waste hydrochloric acid containing iron
CN107162276A (en) A kind of method for removing chromium of ferric trichloride etching waste liquor
CN110541070B (en) Method for comprehensively extracting valuable metals from white alloy
CN114212763B (en) Resource utilization method of cathode plate polishing waste liquid for electrolytic manganese metal
CN110747343B (en) Method for preparing cobalt oxide from zinc smelting cobalt slag
CN110540252A (en) method for preparing battery-grade cobalt sulfate and high-purity germanium dioxide from white alloy
CN112301220A (en) Method for reducing iron content in rare earth sulfate water leaching solution
CN112093818A (en) Method for preparing high-purity zinc sulfate from zinc-containing waste
CN110541073B (en) Recovery method for comprehensively recovering valuable metals from white alloy
CN115057425B (en) Method for preparing iron phosphate from waste lithium iron phosphate battery
CN112777580A (en) Industrial method for treating material containing lithium iron phosphate
CN108996752B (en) Method for recovering low-concentration nickel from nickel extraction waste water
CN113087204A (en) Resourceful treatment method for treating waste acid containing iron and zinc
CN113026056A (en) Method for producing electrolytic cobalt by adopting secondary electrolysis of cobalt intermediate product
CN114735765B (en) Production process of battery grade nickel sulfate
CN113174493B (en) Method for recovering copper and cobalt by combined treatment of selenium steaming slag and alkaline cobalt slag
JP3597907B2 (en) Regeneration method of ferric chloride solution
CN115893507B (en) Method for preparing high-purity ferrous sulfate from copperas slag containing high magnesium, manganese and titanium impurities
CN118854076A (en) Leaching method of laterite nickel ore
CN115261865A (en) Treatment method of ferric trichloride etching waste liquid

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant