CN108754179A - A kind of method of oxidation pre-treatment secondary material containing zinc - Google Patents

A kind of method of oxidation pre-treatment secondary material containing zinc Download PDF

Info

Publication number
CN108754179A
CN108754179A CN201810604950.3A CN201810604950A CN108754179A CN 108754179 A CN108754179 A CN 108754179A CN 201810604950 A CN201810604950 A CN 201810604950A CN 108754179 A CN108754179 A CN 108754179A
Authority
CN
China
Prior art keywords
material containing
secondary material
containing zinc
zinc
persulfate
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.)
Granted
Application number
CN201810604950.3A
Other languages
Chinese (zh)
Other versions
CN108754179B (en
Inventor
杨永斌
李骞
徐斌
姜涛
苏欢欢
钟强
郭宇峰
范晓慧
李光辉
陈许玲
张元波
曾艳
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.)
Central South University
Original Assignee
Central South University
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 Central South University filed Critical Central South University
Priority to CN201810604950.3A priority Critical patent/CN108754179B/en
Publication of CN108754179A publication Critical patent/CN108754179A/en
Application granted granted Critical
Publication of CN108754179B publication Critical patent/CN108754179B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/30Obtaining zinc or zinc oxide from metallic residues or scraps
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/20Obtaining zinc otherwise than by distilling
    • C22B19/24Obtaining zinc otherwise than by distilling with leaching with alkaline solutions, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/20Obtaining zinc otherwise than by distilling
    • C22B19/26Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a kind of methods of oxidation pre-treatment secondary material containing zinc, include the following steps:Before carrying out ammonia leaching to the secondary material containing zinc, oxidation pre-treatment reaction is carried out at least two oxidants are added in secondary material containing zinc, to get pretreated secondary material containing zinc, at least two oxidant includes hydrogen peroxide and persulfate for filtering after the completion of reaction.This method impurity element removal effect is good, do not introduce other impurities ion, zinc loses less, enormously simplifies subsequent purification processing step, solves the problems, such as that the method removal effect of impurity element in existing wet method removing secondary material containing zinc is bad, is readily incorporated foreign ion, also needs to carry out complicated subsequent purification technique.

Description

A kind of method of oxidation pre-treatment secondary material containing zinc
Technical field
The present invention relates to technical field of wet metallurgy, and in particular to a kind of to contain zinc with the pretreatment of a variety of oxidant co-oxidations The method of secondary material.
Background technology
Zinc is current one of higher metal of cyclic utilization rate in the world, and secondary zinc resource has become zinc raw materials for production Important component is counted according to zinc trading company of the U.S. and is shown, the zinc in the whole world 30% is from regeneration zinc resource.Using secondary Zinc resource ammonia process, which prepares activated zinc oxide, becomes people's increasingly focus of attention, has economic value and social benefit.Secondary oxidation Zinc is a kind of common secondary zinc resource, contains the impurity elements such as manganese, iron, cadmium, lead in secondary zinc oxide powder, in leaching process In, some can enter solution to these impurity elements, influence the leaching of zinc, increase subsequent purification burden;In addition, content of iron and manganese It is the important Con trolling index of subsequent product activated zinc oxide, so needing to remove these impurity.
Currently, it is usually that oxygen is added while zincilate end ammonia soaks that wet method, which removes the impurity element in secondary zinc resource, Manganese, ferro element in leachate is oxidized to the manganese of high-valence state, iron Precipitation, reached by agent potassium permanganate or bleaching powder etc. The purpose of removal of impurities.But this method can be caused damages when manganese, iron are precipitated due to the absorption of zinc, and there is medications Amount is difficult to grasp, and solution ph is not easy to control, and removal effect is undesirable and introduces foreign ion to system when removing ferrimanganic The shortcomings that, it is likely to result in industrial so-called " returning manganese " phenomenon;In addition, this method oxidation is not thorough, subsequently also need to purify Technique.And removal of impurities is usually the two sections of displacements of zincification powder after ammonia leaching, then add ammonium persulfate removing impurities by oxidation, this method purification technique Long, purification burden weight, the addition of ammonium persulfate can also increase the ammonia in solution, increase follow-up recovery ammonia burden.
Chinese publication CN102633295A discloses a kind of Pretreatment Methods of soot containing zinc, and soot containing zinc exists Calcium hypochlorite or sodium hypochlorite are added before ammonia leaching or hydrogen peroxide carries out oxidation pre-treatment, effectively reduces in zinc ammonia leaching solution Manganese, iron content, but the pH of its preprocessing process be 9-11, for the zinc-containing dust containing zinc oxide, zinc oxide can dissolve Into in solution, the loss of zinc is caused, in addition bleaching powder is met high temperature and acutely decomposed, and can set off an explosion, and has corrosivity.
There is research that ammonium persulfate is added in the solution that zincilate end ammonia soaks, the divalent Fe and Mn in solution is distinguished It is oxidized to ferric ion and tetravalence manganese ion, generates hydroxide hydrate colloid, but colloid is difficult to thoroughly precipitate, removing Effect is undesirable, subsequently also needs to that activated zinc oxide and activated carbon is added.
Invention content
The main purpose of the present invention is to provide a kind of dual oxidants co-oxidation pre-process the secondary material containing zinc method, Method removal effect to solve impurity element in existing wet method removing secondary material containing zinc is bad, be readily incorporated impurity from Son also needs the problems such as subsequent purification technique of progress complexity.
To achieve the goals above, the present invention provides a kind of methods of oxidation pre-treatment secondary material containing zinc, including with Lower step:To before containing the progress ammonia leaching of zinc secondary material, being joined at least two oxidants are added in secondary material containing zinc Oxidation pre-treatment reaction is closed, filtering is to get pretreated secondary material containing zinc, at least two oxidant after the completion of reaction Including hydrogen peroxide and persulfate.
Further, the molar ratio of hydrogen peroxide and persulfate is 3:1-3:9, more preferably 3:6-3:9, most preferably 3:7。
Further, the total concentration of hydrogen peroxide and persulfate in reaction solution and divalent in secondary material containing zinc Manganese, divalent ferro element total concentration ratio be 5-12, more preferably 9-12, most preferably 11.
Further, the temperature of reaction is 30-80 DEG C, more preferably 60 DEG C -80 DEG C, most preferably 60 DEG C.
Further, the time of reaction is 60-180min, more preferably 120-180min, most preferably 120min.
Further, oxidation pre-treatment reaction carries out in neutral conditions.
Further, secondary material containing zinc is soot containing zinc or secondary zinc oxide powder.
Further, persulfate is potassium peroxydisulfate.
Apply the technical scheme of the present invention, to contain zinc secondary material (such as secondary zinc oxide) carry out ammonia leaching before, first to containing At least two oxidants (including hydrogen peroxide and persulfate) are added in zinc secondary material and carry out oxidation pre-treatment reaction, Obtain pretreated secondary material containing zinc.Hydrogen peroxide and potassium peroxydisulfate all have a very strong oxidisability, and hydrogen peroxide can be with Hydroxyl radical free radical (.OH) is generated, persulfate can generate potentiometric titrations (SO4 -.), hydrogen peroxide is combined with persulfate It uses, oxidant can be in wider pH range internal oxiditions secondary material containing zinc;Also, hydrogen peroxide is reacted with ferrous ion Heat release can provide advantage for the activation of persulfate, and persulfate can slow down the decomposition of hydrogen peroxide again.The present invention is logical The oxidisability for crossing the mutual promoting action enhancing system between two kinds of oxidants, passes through the association between hydrogen peroxide and persulfate Same-action,.OH and SO4 -.Mutually excitation, forms the stronger system of oxidisability, substantially increases the removing effect to impurity element Fruit.This method will not introduce other impurities ion, significantly by carrying out oxidation pre-treatment before ammonia soaks in zinc ammonia leaching solution Shorten subsequent purification processing step.Iron, manganese in one side secondary zinc oxide have been oxidized to high-valence state, avoid in the dipped journey of ammonia In dissolving, eliminate follow-up iron, manganese removal of impurities process;On the other hand, in preprocessing process, cadmium, lead can be immersed secondary zinc oxide Go out a part, especially cadmium largely to be leached, greatly reduces follow-up removal of impurities burden, the purity of obtained purified solution Also higher.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As recorded in background technology, in existing wet method removing secondary material containing zinc there is removing in the method for impurity element Effect is undesirable, be readily incorporated other impurities, also needs the problems such as subsequent purification technique, and to solve the above-mentioned problems, the application carries A kind of method of oxidation pre-treatment secondary material containing zinc is supplied.
In a kind of typical embodiment of the application, a kind of side of oxidation pre-treatment secondary material containing zinc is provided Method includes the following steps:To before containing the progress ammonia leaching of zinc secondary material, being aoxidized at least two are added in secondary material containing zinc Agent carries out oxidation pre-treatment reaction, and filtering is to get pretreated secondary material containing zinc after the completion of reaction.Wherein, this at least two Kind oxidant includes hydrogen peroxide and persulfate.
The removing of iron and manganese of secondary material containing zinc in the prior art, the conventional process for reducing cadmium lead content are that ammonia soaks simultaneous oxidation Zincification powder adds oxidant and removes manganese element except cadmium, iron, lead and other elements after removing of iron and manganese or ammonia leaching.This technique is leached in zinc ammonia It is easily introduced other impurities ion in liquid, causes product impurity content exceeding index;In addition, the hydroxide precipitation due to ferrimanganic is easily formed Colloid causes sedimentation filtration difficult, also adds subsequent purification burden, and the removal effect of impurity element is unsatisfactory.
The present invention passes through to before containing the progress ammonia leaching of zinc secondary material, being first added at least two into secondary material containing zinc Oxidant (including hydrogen peroxide and persulfate) carries out oxidation pre-treatment reaction, obtains the pretreated secondary object containing zinc Material.All there is very strong oxidisability, hydrogen peroxide can generate hydroxyl radical free radical (.OH), mistake for hydrogen peroxide and persulfate Sulfate can generate potentiometric titrations (SO4 -.), hydrogen peroxide and persulfate are used in combination, oxidant can be wider PH range internal oxiditions secondary material containing zinc;Also, hydrogen peroxide and the work that ferrous ion exothermic heat of reaction can be persulfate Change and advantage is provided, persulfate can slow down the decomposition of hydrogen peroxide again.
The present invention enhances the oxidisability of system by mutual promoting action between two kinds of oxidants, by hydrogen peroxide with Synergistic effect between persulfate,.OH and SO4 -.Mutually excitation, forms the stronger system of oxidisability, substantially increases pair The removal effect of impurity element.This method will not be introduced by carrying out oxidation pre-treatment before ammonia soaks in zinc ammonia leaching solution Other impurities ion substantially reduces subsequent purification processing step.
The present invention pre-processes secondary material containing zinc using hydrogen peroxide and persulfate oxidation, can will contain in zinc secondary material Bivalent manganese, ferro element be oxidized into value Mn and iron, form hydroxide or hydrate enter in solution, after filtering with The pretreated separation of secondary material containing zinc, avoids the impurity elements such as manganese, iron from entering zinc ammonia leaching solution.Two kinds oxidizing two Valence iron, the reaction equation of manganese element are as follows:
2MnO+(S2O8)2-+4H2O=2MnO2+8H++2(SO4)2- (1)
Fe3O4+H2O2+2H+=2Fe3++2H2O (2)
Fe3O4+(S2O8)2-=2Fe3++2(SO4)2- (3)
By verification experimental verification, in the oxidizer system used in the present invention, by the molar ratio of hydrogen peroxide and persulfate Control is being 3:1-3:9, further preferably 3:6-3:9, most preferably 3:When 7, hydrogen peroxide and mistake can be preferably played Synergistic effect between two kinds of oxidants of sulfate, it is more preferable to the removal effect of impurity element in secondary material containing zinc.
In order to reach ideal removal effect, and saving raw material as far as possible reduces cost, in the present invention, by hydrogen peroxide With the ratio control of bivalent manganese, divalent ferro element total concentration in total concentration of the persulfate in reaction solution and secondary material containing zinc System is in 5-12, and further control is in 9-12, most preferably 11.It is found by repetition test, the dosage of oxidant is controlled upper Ideal removal effect can not only be reached by stating range, but also can save oxidant, avoid the waste for causing oxidant.
In the present invention, the temperature of oxidation pre-treatment reaction is controlled at 30-80 DEG C, it is more preferably 60 DEG C -80 DEG C, optimal It is selected as 60 DEG C.At this temperature, it can both reach good removal effect, suitable removal efficiency, and can be to avoid due to temperature Spending height causes hydrogen peroxide decomposition too fast, and can also reduce energy consumption.
Inventor has found through repetition test, in the use of above-mentioned oxidant composition and ratio, oxidant and the secondary material containing zinc Under the conditions of amount ratio and reaction temperature, by the time control of reaction in 60-180min, more preferably 120-180min, most preferably For 120min when, you can to obtain good removal effect, the reaction time continues to extend, removal effect improve unobvious, instead Treatment effeciency can be reduced.
In the present invention, the close neutrality of the pH for the oxidation system being made of hydrogen peroxide and persulfate, oxidation pre-treatment Reaction can carry out under conditions of close to neutral.And the pH of existing its preprocessing process of processing method is generally 9-11, Under alkaline condition, zinc oxide when oxidation pre-treatment in secondary material containing zinc can be dissolved into solution, cause the loss of zinc.This The processing method of invention is pre-processed under near-neutral sulfite deinking, greatly reduces zinc loss.
Secondary material containing zinc handled by the method for the present invention can be various industrial secondary zinc resources, such as soot containing zinc With secondary zinc oxide powder etc..Persulfate used in the method for the present invention can be sodium peroxydisulfate, potassium peroxydisulfate etc..
To sum up, the present invention can not introduce other impurities ion, under the premise of avoiding zinc oxide solution loss, have Effect handles secondary zinc oxide raw material, manganese, iron in reduction zinc ammonia leaching solution, cadmium, lead element content, and reduces the consumption of leaching agent, Subsequent purification burden is reduced, subsequent purification technique is simplified, is that manganese, iron, cadmium, the lead in the active oxidation zinc product subsequently prepared are miscellaneous Matter content meets industrial product quality and requires to be ready.
Below in conjunction with specific embodiment, the invention will be further described, but should not be construed as protecting the present invention The limitation of range.
Secondary zinc oxide dust used in following embodiment contains zinc 50.83%, and Mn 0.15%, Fe 2.84%, Cd are 0.22%, Pb 6.47%, main component are zinc oxide, and zinc oxide is a kind of amphoteric oxide, are insoluble in water or ethyl alcohol, solvable In acid and highly basic.The present invention is suitable for this raw material, but is not limited only to this raw material.
Embodiment 1:
It takes 25g secondary zinc oxides to carry out oxidation pre-treatment, selects dual oxidants hydrogen peroxide and potassium peroxydisulfate molar concentration rate Respectively 0,3:6,3:7,3:8.Ferrous iron in oxidant concentration and secondary zinc oxide, manganese element concentration proportion be 11.Reaction temperature Degree is 60 DEG C, pretreatment time 120min, and reaction system nature pH is 6-7, filter cake is filtered to obtain after pretreatment, filter cake is 90 It is 5 hours dry at DEG C, obtain four groups of pretreated samples.
It takes the pretreated sample of each group ammonia at 30 DEG C to soak 1 hour, filters to obtain zinc ammonia leaching solution, detect each group leachate The content of middle iron, manganese, cadmium, lead metal impurity element.The results are shown in Table 1:
Each group of data in contrast table 1 is it is found that when the concentration ratio of hydrogen peroxide and potassium peroxydisulfate is 3:When 7, in leachate Iron, manganese element 0, i.e., iron, manganese element have been not present in leachate, and cadmium, lead element concentration are also relatively small.
Metallic impurity elements content in 1 leachate of table
Embodiment 2:
25g secondary zinc oxides are taken to carry out oxidation pre-treatment, it is 3 to select the molar concentration rate of hydrogen peroxide and potassium peroxydisulfate:7, Take ferrous iron in oxidant concentration and secondary zinc oxide, the concentration proportion of manganese element is respectively 9,10,10.5,11,12, other steps It is constant, the content of iron, manganese, cadmium, lead metal impurity element in each group leachate is detected, the results are shown in Table 2:
Metallic impurity elements content in 2 leachate of table
From Table 2, it can be seen that when the concentration proportion increase of ferrous iron, manganese element in the concentration of oxidant and secondary zinc oxide When to 11, without the presence of iron, manganese element in leachate, cadmium, the concentration of lead element are also relatively small.
Embodiment 3:
25g secondary zinc oxides are taken to carry out oxidation pre-treatment, it is 3 to select the molar concentration rate of hydrogen peroxide and potassium peroxydisulfate:7, Ferrous iron in oxidant concentration and secondary zinc oxide, manganese element concentration proportion be 11, pretreatment temperature selects 50 DEG C respectively, 60 DEG C, 70 DEG C, other steps are constant, detect the content of iron, manganese, cadmium, lead metal impurity element in each group leachate, as a result such as table 3 It is shown:
As shown in Table 3, when pretreatment temperature increases to 60 DEG C, iron, manganese element content in leachate are 0, are leached molten Without the presence of iron, manganese element in liquid.
Metallic impurity elements content in 3 leachate of table
Embodiment 4:
25g secondary zinc oxides are taken to carry out oxidation pre-treatment, it is 3 to select the molar concentration rate of hydrogen peroxide and potassium peroxydisulfate:7, Ferrous iron in oxidant concentration and secondary zinc oxide, manganese element concentration proportion be 11,60 DEG C of pretreatment temperature, pretreatment time point 0,1.5h, 2h, 2.5h are not selected, other steps are constant, detect iron, manganese, cadmium, lead metal impurity element in each group leachate and contain Amount, the results are shown in Table 4:
Metallic impurity elements content in 4 leachate of table
As shown in Table 4, when pretreatment time increases to 2h, the manganese, iron content in zinc ammonia leaching solution are reduced to 0, have expired Sufficient industrial requirements, cadmium, lead element content in infusion solution significantly reduce.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of method of oxidation pre-treatment secondary material containing zinc, includes the following steps:It is carried out to the secondary material containing zinc Before ammonia leaching, oxidation pre-treatment reaction is carried out at least two oxidants are added in secondary material containing zinc, is filtered after the completion of reaction, Up to pretreated secondary material containing zinc, at least two oxidant includes hydrogen peroxide and persulfate.
2. according to the method described in claim 1, it is characterized in that, the molar ratio of the hydrogen peroxide and persulfate is 3:1- 3:9。
3. according to the method described in claim 2, it is characterized in that, the molar ratio of the hydrogen peroxide and persulfate is 3:7.
4. according to the method described in claim 1, it is characterized in that, the hydrogen peroxide and persulfate are in reaction solution Bivalent manganese in total concentration and secondary material containing zinc, divalent ferro element total concentration ratio be 5-12.
5. according to the method described in claim 4, it is characterized in that, the hydrogen peroxide and persulfate are in reaction solution Bivalent manganese in total concentration and secondary material containing zinc, divalent ferro element total concentration ratio be 11.
6. according to the method described in claim 1, it is characterized in that, the temperature of the reaction be 30-80 DEG C, preferably 60 DEG C- 80 DEG C, most preferably 60 DEG C.
7. according to the method described in claim 1, it is characterized in that, the time of the reaction is 60-180min, preferably 120- 180min, most preferably 120min.
8. according to the method described in claim 1, it is characterized in that, oxidation pre-treatment reaction carries out in neutral conditions.
9. according to the method described in claim 1, it is characterized in that, the secondary material containing zinc is soot containing zinc or secondary zinc oxide Powder.
10. according to the method described in claim 1, it is characterized in that, the persulfate is potassium peroxydisulfate.
CN201810604950.3A 2018-06-13 2018-06-13 Method for oxidizing pretreatment of zinc-containing secondary material Active CN108754179B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810604950.3A CN108754179B (en) 2018-06-13 2018-06-13 Method for oxidizing pretreatment of zinc-containing secondary material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810604950.3A CN108754179B (en) 2018-06-13 2018-06-13 Method for oxidizing pretreatment of zinc-containing secondary material

Publications (2)

Publication Number Publication Date
CN108754179A true CN108754179A (en) 2018-11-06
CN108754179B CN108754179B (en) 2019-12-20

Family

ID=64021025

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810604950.3A Active CN108754179B (en) 2018-06-13 2018-06-13 Method for oxidizing pretreatment of zinc-containing secondary material

Country Status (1)

Country Link
CN (1) CN108754179B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114150156A (en) * 2021-11-30 2022-03-08 西安建筑科技大学 Process for extracting zinc from low-grade zinc-containing dust and preparing nano zinc oxide

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1065685A (en) * 1992-04-28 1992-10-28 中南工业大学 Zinc oxide preparing process by ammonia method
CN1970801A (en) * 2005-11-23 2007-05-30 中南大学 Method for separating Fe-Mn and Mn-Zn
CN102583503A (en) * 2011-01-18 2012-07-18 郴州市金贵银业股份有限公司 Method for preparing activated zinc oxide by utilizing high-arsenic secondary zinc oxide resource ammonia-ammonium process
CN102633295A (en) * 2012-04-26 2012-08-15 中南大学 Oxidation pretreatment method of soot containing zinc
CN105032142A (en) * 2015-07-22 2015-11-11 华北电力大学 Flue gas integration removal system and method by means of gas-like phase preoxidation combining with absorption
CN105293564A (en) * 2015-10-05 2016-02-03 李果 Method for recycling zinc-containing dust ash in steel plant
CN106269823A (en) * 2016-08-25 2017-01-04 杭州大地环保工程有限公司 A kind of restorative procedure of high-enriched organics contaminated soil
CN106925097A (en) * 2017-04-28 2017-07-07 陶汉中 It is a kind of based on liquid phase oxidation to the combined column and its technique of flue gas desulfurization and denitrification
CN108046483A (en) * 2018-01-31 2018-05-18 大唐环境产业集团股份有限公司 A kind of device and method based on persulfate processing desulfurization wastewater

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1065685A (en) * 1992-04-28 1992-10-28 中南工业大学 Zinc oxide preparing process by ammonia method
CN1970801A (en) * 2005-11-23 2007-05-30 中南大学 Method for separating Fe-Mn and Mn-Zn
CN102583503A (en) * 2011-01-18 2012-07-18 郴州市金贵银业股份有限公司 Method for preparing activated zinc oxide by utilizing high-arsenic secondary zinc oxide resource ammonia-ammonium process
CN102633295A (en) * 2012-04-26 2012-08-15 中南大学 Oxidation pretreatment method of soot containing zinc
CN105032142A (en) * 2015-07-22 2015-11-11 华北电力大学 Flue gas integration removal system and method by means of gas-like phase preoxidation combining with absorption
CN105293564A (en) * 2015-10-05 2016-02-03 李果 Method for recycling zinc-containing dust ash in steel plant
CN106269823A (en) * 2016-08-25 2017-01-04 杭州大地环保工程有限公司 A kind of restorative procedure of high-enriched organics contaminated soil
CN106925097A (en) * 2017-04-28 2017-07-07 陶汉中 It is a kind of based on liquid phase oxidation to the combined column and its technique of flue gas desulfurization and denitrification
CN108046483A (en) * 2018-01-31 2018-05-18 大唐环境产业集团股份有限公司 A kind of device and method based on persulfate processing desulfurization wastewater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114150156A (en) * 2021-11-30 2022-03-08 西安建筑科技大学 Process for extracting zinc from low-grade zinc-containing dust and preparing nano zinc oxide
CN114150156B (en) * 2021-11-30 2023-10-13 西安建筑科技大学 Low-grade zinc-containing dust zinc extraction and nano zinc oxide preparation process

Also Published As

Publication number Publication date
CN108754179B (en) 2019-12-20

Similar Documents

Publication Publication Date Title
CA2663108C (en) Method of producing iron-arsenic compound excellent in crystallinity
CN102121068A (en) Method for preparing vanadium pentoxide
CN109055757B (en) Method for recovering manganese dioxide and lead in anode slag of electrolytic manganese or electrolytic zinc
CN109439907A (en) A method of iron aluminium is removed from the pickle liquor during recycling used Li ion cell
CN107674975B (en) The separation and recovery method of cobalt and manganese in a kind of cobalt manganese waste material
CN102230088A (en) Method for extracting manganese from manganese-enriched slag
CN106180138A (en) A kind of processing method of arsenic-containing waste
CN106947872A (en) method for purifying zinc oxide
CN107828965B (en) A kind of method of cobalt and manganese in separating and recovering cobalt manganese waste material
CN102633295A (en) Oxidation pretreatment method of soot containing zinc
CN107099672B (en) The recovery method of the fume from steel making containing zinc
CN108330286A (en) A method of synthetical recovery cobalt and lithium from cobalt acid lithium waste material
CN108754179A (en) A kind of method of oxidation pre-treatment secondary material containing zinc
CN1276104C (en) Deep-purifying detinning method of sodium tungstate solution
CN111847702B (en) Method for treating cyanide-containing high-concentration ammonium sulfite wastewater
CN104775040B (en) Comprehensive recycling process for acid leaching residues
CN116588909A (en) Method for preparing ferric phosphate from ferrophosphorus slag after lithium extraction of waste lithium iron phosphate
CN110482613A (en) A kind of technique preparing manganese sulfate using Waste Sulfuric Acid in DYE PRODUCTION
CN105983707A (en) Method for preparing high-purity rhenium powder from rhenium-containing high-arsenic copper sulfide
CN111039448B (en) Method for removing manganese impurities in acidic solution by ozone
CN106629853A (en) Method for deeply removing chromium in tungsten-containing waste recycling process
US2231181A (en) Process of reducing ferric compounds
CN110357164A (en) The method that manganese oxide ore pulp recycles high-efficiency flue gas desulfurization coupling manganese sulfate green purifying
CN113355511B (en) Method for selectively reducing vanadium and titanium content in vanadium-titanium magnetite concentrate through ammonium-ammonia oxidation leaching system
CN106380015A (en) Method for removing copper ions in nitric acid-containing copper sulfate waster 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