CN115058600B - Method for preparing manganese sulfate solution from anode slag and recovering lead - Google Patents

Method for preparing manganese sulfate solution from anode slag and recovering lead Download PDF

Info

Publication number
CN115058600B
CN115058600B CN202210858773.8A CN202210858773A CN115058600B CN 115058600 B CN115058600 B CN 115058600B CN 202210858773 A CN202210858773 A CN 202210858773A CN 115058600 B CN115058600 B CN 115058600B
Authority
CN
China
Prior art keywords
manganese
reducing agent
lead
sulfuric acid
anode slag
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
CN202210858773.8A
Other languages
Chinese (zh)
Other versions
CN115058600A (en
Inventor
王家伟
王海峰
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.)
Guizhou University
Original Assignee
Guizhou 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 Guizhou University filed Critical Guizhou University
Priority to CN202210858773.8A priority Critical patent/CN115058600B/en
Publication of CN115058600A publication Critical patent/CN115058600A/en
Application granted granted Critical
Publication of CN115058600B publication Critical patent/CN115058600B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C22B7/007—Wet processes by acid leaching
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00—Obtaining lead
    • C22B13/04—Obtaining lead by wet processes
    • C22B13/045—Recovery from waste materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B47/00—Obtaining manganese
    • 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

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

Abstract

The invention belongs to the technical field of solid waste utilization. The invention providesA method for preparing manganese sulfate solution and recovering lead from anode slag is provided. The invention mixes manganese anode slag, water, reducing agent and sulfuric acid solution to obtain slurry, wherein the reducing agent adopts a composite reducing agent of ascorbic acid and thiourea dioxide, can stably exist in acid and is harmless to the environment; ultrasonic filtering the slurry to obtain filtrate and filter residue; manganese in the anode slag is reduced from Mn by reduction 4+ Conversion to soluble Mn 2+ The ions enter the liquid, lead is changed into lead sulfate to be precipitated, and the separation of lead and manganese is conveniently realized. The addition of the alkaline agent and the ammonium sulfide can remove heavy metals, so that a purer manganese sulfate solution is obtained. Mixing the filter residue, sulfuric acid solution and reducing agent, reacting, and further leaching lead under acidic condition to obtain lead sulfate precipitate.

Description

Method for preparing manganese sulfate solution from anode slag and recovering lead
Technical Field
The invention relates to the technical field of solid waste utilization, in particular to a method for preparing manganese sulfate solution and recycling lead from anode slag.
Background
Manganese is used as a common element in the alloy, and can obviously improve the hardness of the alloy material, so that the manganese is widely applied. Manganese is derived from manganese ores in nature, and manganese elements are extracted from the ores through manual extraction to obtain manganese simple substances. There are two refining methods widely used in industry at present, one is thermal refining and the other is wet refining. The purity of the metal manganese obtained by the thermal refining method is about 95 percent, and further treatment is needed before application. The purity of the metal manganese obtained by wet extraction can reach more than 99.7%, so the wet extraction becomes a main production mode of the metal manganese. The general flow of wet refining is to obtain manganese salt after leaching manganese ore, and then send the manganese source to an electrolytic tank to separate out elemental manganese through electrolysis. In this way, a large amount of manganese dioxide is generated on the anode, and other impurity metals such as iron, lead, tin, copper, magnesium, etc. leached from manganese ore adhere to the anode, resulting in anode slag having a complex composition. If the anode slag is buried in situ, soil and a water source can be directly polluted, and if the anode slag is calcined, harmful gas can enter the atmosphere, so that the human health is seriously harmed. Therefore, how to treat anode slag generated from an anode in an electrolysis process becomes a problem to be solved in the manganese refining industry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for preparing a manganese sulfate solution from anode slag and recovering lead.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for preparing a manganese sulfate solution and recovering lead from anode slag, which comprises the following steps:
(1) Mixing manganese anode slag, water, a reducing agent and a sulfuric acid solution to obtain slurry;
(2) Ultrasonic filtering the slurry to obtain filtrate and filter residue;
(3) Mixing the filtrate with an alkaline agent, and adding ammonium sulfide to obtain a manganese sulfate solution;
(4) Mixing the filter residue, sulfuric acid solution and reducing agent for reaction to obtain lead sulfate.
Preferably, the reducing agent in the step (1) comprises ascorbic acid and thiourea dioxide, wherein the mass ratio of the ascorbic acid to the thiourea dioxide is 1-1.5: 7-8;
the mass concentration of the sulfuric acid solution is 12-17%;
the mass volume ratio of the manganese anode slag to the water is 1kg: 4-5L;
the mass ratio of the manganese anode slag to the reducing agent is 100: 15-22;
the mass volume ratio of the manganese anode slag to the sulfuric acid solution is 1kg: 2-3L.
Preferably, the frequency of the ultrasonic wave in the step (2) is 30-40 kHz and the time is 1-2 hours.
Preferably, in the step (3), the alkaline agent is ammonia water or manganese carbonate;
the pH value after adding the alkaline agent is 4.5-5.0.
Preferably, in the step (3), the filtrate and the alkaline agent are mixed and then reacted for 40 to 50 minutes.
Preferably, the pH value after adding ammonium sulfide in the step (3) is 6.5-7;
and adding ammonium sulfide for reaction for 30-40 min.
Preferably, the mass concentration of the sulfuric acid solution in the step (4) is 5-10%;
the reducing agent is ammonium hypophosphite.
Preferably, in the step (4), the mass ratio of the filter residue to the reducing agent is 5:1 to 1.5;
the mass volume ratio of the filter residue to the sulfuric acid solution is 1kg:2 to 2.5L.
Preferably, the stirring speed of the reaction in the step (4) is 210 to 260rpm and the time is 150 to 180min.
The invention provides a method for preparing a manganese sulfate solution from anode slag and recovering lead. The invention mixes manganese anode slag, water, reducing agent and sulfuric acid solution to obtain slurry, wherein the reducing agent adopts a composite reducing agent of ascorbic acid and thiourea dioxide, can stably exist in acid and is harmless to the environment; ultrasonic filtering the slurry to obtain filtrate and filter residue; manganese in the anode slag is reduced from Mn by reduction 4+ Conversion to soluble Mn 2+ The ions enter the liquid, lead is changed into lead sulfate to be precipitated, and the separation of lead and manganese is conveniently realized. Mixing the filtrate with an alkaline agent, adding ammonium sulfide, and adding the alkaline agent and the ammonium sulfide to remove heavy metals, thereby obtaining purer manganese sulfate solution. Mixing the filter residue, sulfuric acid solution and reducing agent, reacting, and further leaching lead under acidic condition to obtain lead sulfate precipitate.
The method provided by the invention is simple and efficient, the used reagent is safe and environment-friendly, the manganese element and the lead element in the anode slag can be effectively separated and extracted, and the useful resource is well recycled.
Detailed Description
The invention provides a method for preparing a manganese sulfate solution and recovering lead from anode slag, which comprises the following steps:
(1) Mixing manganese anode slag, water, a reducing agent and a sulfuric acid solution to obtain slurry;
(2) Ultrasonic filtering the slurry to obtain filtrate and filter residue;
(3) Mixing the filtrate with an alkaline agent, and adding ammonium sulfide to obtain a manganese sulfate solution;
(4) Mixing the filter residue, sulfuric acid solution and reducing agent for reaction to obtain lead sulfate.
In the present invention, the reducing agent in step (1) comprises ascorbic acid and thiourea dioxide, and the mass ratio of the ascorbic acid to the thiourea dioxide is preferably 1 to 1.5:7 to 8, more preferably 1.1 to 1.4:7.2 to 7.8, more preferably 1.2 to 1.3:7.4 to 7.6.
In the present invention, the mass concentration of the sulfuric acid solution is preferably 12 to 17%, more preferably 13 to 16%, and even more preferably 14 to 15%.
In the invention, the mass volume ratio of the manganese anode slag to the water is preferably 1kg:4 to 5L, more preferably 1kg:4.2 to 4.8L, more preferably 1kg: 4.4-4.6L.
In the invention, the mass ratio of the manganese anode slag to the reducing agent is preferably 100:15 to 22, more preferably 100:16 to 21, more preferably 100:18 to 19.
In the invention, the mass volume ratio of the manganese anode slag to the sulfuric acid solution is preferably 1kg:2 to 3L, more preferably 1kg:2.2 to 2.8L, more preferably 1kg: 2.4-2.6L.
In the present invention, the frequency of the ultrasonic waves in the step (2) is preferably 30 to 40kHz, more preferably 32 to 38kHz, still more preferably 34 to 36kHz; the time is preferably 1 to 2 hours, more preferably 1.2 to 1.8 hours, and still more preferably 1.4 to 1.6 hours.
In the invention, the alkaline agent in the step (3) is ammonia water or manganese carbonate.
In the present invention, the pH after adding the alkaline agent is preferably 4.5 to 5.0, more preferably 4.6 to 4.9, and still more preferably 4.7 to 4.8.
In the present invention, the reaction is carried out after mixing the filtrate and the alkaline agent in the step (3), and the reaction time is preferably 40 to 50 minutes, more preferably 42 to 48 minutes, and still more preferably 44 to 46 minutes.
In the present invention, the pH after adding ammonium sulfide in step (3) is preferably 6.5 to 7, more preferably 6.6 to 6.9, and still more preferably 6.7 to 6.8.
In the present invention, the reaction is carried out after adding ammonium sulfide, and the reaction time is preferably 30 to 40 minutes, more preferably 32 to 38 minutes, and still more preferably 34 to 36 minutes.
In the present invention, the mass concentration of the sulfuric acid solution in the step (4) is preferably 5 to 10%, more preferably 6 to 9%, and still more preferably 7 to 8%.
In the present invention, the reducing agent is preferably ammonium hypophosphite.
In the present invention, the mass ratio of the filter residue to the reducing agent in the step (4) is preferably 5:1 to 1.5, more preferably 5:1.1 to 1.4, more preferably 5:1.2 to 1.3.
In the invention, the mass-volume ratio of the filter residue to the sulfuric acid solution is preferably 1kg:2 to 2.5L, more preferably 1kg:2.1 to 2.4L, more preferably 1kg: 2.2-2.3L.
In the present invention, the stirring speed of the reaction in the step (4) is preferably 210 to 260rpm, more preferably 220 to 250rpm, still more preferably 230 to 240rpm; the time is preferably 150 to 180 minutes, more preferably 160 to 170 minutes, and still more preferably 164 to 166 minutes.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
1kg of manganese anode slag, 5L of water, 0.2kg of reducing agent (the mass ratio of ascorbic acid to thiourea dioxide is 1:8) and 3L of sulfuric acid solution with the mass concentration of 15% are mixed, ultrasonic treatment is carried out for 1.5 hours at the frequency of 35kHz, and filtrate and filter residues are obtained through filtration. Adding manganese carbonate into the filtrate, reacting for 45min until the pH value is 4.8, then adding ammonium sulfide until the pH value is 6.6, continuing to react for 40min, and filtering to obtain a manganese sulfate solution. Mixing filter residues, ammonium hypophosphite and sulfuric acid solution with the mass concentration of 8% according to the following weight ratio of 5kg:1.3kg:10L of the lead sulfate is mixed, stirred at 230rpm for 160min, and filtered after stirring is finished to obtain the lead sulfate.
In this example, the leaching rate of manganese was 97.34% and the lead content in lead sulfate was 66.2%.
Example 2
10kg of manganese anode slags, 40L of water, 2.2kg of reducing agent (the mass ratio of ascorbic acid to thiourea dioxide is 1.5:6) and 23L of sulfuric acid solution with the mass concentration of 12% are mixed, ultrasonic treatment is carried out for 2 hours at the frequency of 30kHz, and filtrate and filter residues are obtained through filtration. Adding manganese carbonate into the filtrate, reacting for 50min until the pH value is 4.5, then adding ammonium sulfide until the pH value is 7, continuing to react for 30min, and filtering to obtain a manganese sulfate solution. Mixing filter residues, ammonium hypophosphite and sulfuric acid solution with the mass concentration of 10% according to the weight ratio of 5kg:1kg: mixing at a ratio of 12.5L, stirring at 260rpm for 150min, and filtering to obtain lead sulfate.
In this example, the leaching rate of manganese was 97.06%, and the lead content in lead sulfate was 65.4%.
Example 3
0.5kg of manganese anode slag, 2.5L of water, 0.09kg of reducing agent (the mass ratio of ascorbic acid to thiourea dioxide is 1.3:7.7) and 1L of sulfuric acid solution with the mass concentration of 17% are mixed, ultrasonic treatment is carried out for 2 hours at the frequency of 40kHz, and filtrate and filter residues are obtained by filtration. Adding ammonia water into the filtrate until the pH value is 5, reacting for 40min, then adding ammonium sulfide until the pH value is 7, continuing to react for 30min, and filtering to obtain manganese sulfate solution. Mixing filter residues, ammonium hypophosphite and sulfuric acid solution with the mass concentration of 10% according to the weight ratio of 5kg:1.4kg:11.5L, and then stirring at 240rpm for 170min, and filtering after stirring to obtain lead sulfate.
In this example, the leaching rate of manganese was 96.87%, and the lead content in lead sulfate was 65.7%.
Example 4
5kg of manganese anode slag, 20L of water, 0.8kg of reducing agent (the mass ratio of ascorbic acid to thiourea dioxide is 1.4:7.2) and 10L of sulfuric acid solution with the mass concentration of 16% are mixed, ultrasonic treatment is carried out for 1.8 hours at the frequency of 40kHz, and filtrate and filter residues are obtained by filtration. Adding ammonia water into the filtrate, reacting for 50min until the pH value is 4.5, then adding ammonium sulfide until the pH value is 6.5, continuing to react for 30min, and filtering to obtain manganese sulfate solution. Mixing filter residues, ammonium hypophosphite and a sulfuric acid solution with the mass concentration of 6% according to the following weight ratio of 5kg:1.5kg: mixing at a ratio of 12L, stirring at 255rpm for 180min, and filtering to obtain lead sulfate.
In this example, the leaching rate of manganese was 96.88% and the lead content in lead sulfate was 66.12%.
Example 5
0.1kg of manganese anode slag, 0.48L of water, 0.018kg of reducing agent (the mass ratio of ascorbic acid to thiourea dioxide is 1.4:7.2) and 0.3L of sulfuric acid solution with the mass concentration of 16% are mixed, ultrasonic treatment is carried out for 2 hours at the frequency of 30kHz, and filtrate and filter residues are obtained by filtration. Adding ammonia water into the filtrate until the pH value is 5.0, reacting for 50min, adding ammonium sulfide until the pH value is 7, continuing to react for 30min, and filtering to obtain manganese sulfate solution. Mixing filter residues, ammonium hypophosphite and a sulfuric acid solution with the mass concentration of 6% according to the following weight ratio of 5kg:1.2kg:10L of the lead sulfate is mixed, stirred for 180min at a speed of 210rpm, and filtered after stirring is finished to obtain the lead sulfate.
In this example, the leaching rate of manganese was 97.26% and the lead content in lead sulfate was 65.83%.
From the above examples, the present invention provides a method for preparing a manganese sulfate solution from anode slag and recovering lead. The invention mixes manganese anode slag, water, reducing agent and sulfuric acid solution to obtain slurry, wherein the reducing agent adopts a composite reducing agent of ascorbic acid and thiourea dioxide, can stably exist in acid and is harmless to the environment; ultrasonic filtering the slurry to obtain filtrate and filter residue; manganese in the anode slag is reduced from Mn by reduction 4+ Conversion to soluble Mn 2+ The ions enter the liquid, lead is changed into lead sulfate to be precipitated, and the separation of lead and manganese is conveniently realized. Mixing the filtrate with an alkaline agent, adding ammonium sulfide, and adding the alkaline agent and the ammonium sulfide to remove heavy metals, thereby obtaining purer manganese sulfate solution. Mixing the filter residue, sulfuric acid solution and reducing agent, reacting, and further leaching lead under acidic condition to obtain lead sulfate precipitate. According to the method provided by the invention, the leaching rate of manganese is 97.34%, and the content of lead in lead sulfate is 66.2%, so that the full recycling of useful metals is realized.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (6)

1. A method for preparing a manganese sulfate solution and recovering lead from anode slag, which is characterized by comprising the following steps:
(1) Mixing manganese anode slag, water, a reducing agent and a sulfuric acid solution to obtain slurry;
(2) Ultrasonic filtering the slurry to obtain filtrate and filter residue;
(3) Mixing the filtrate with an alkaline agent, and adding ammonium sulfide to obtain a manganese sulfate solution;
(4) Mixing filter residues, sulfuric acid solution and a reducing agent for reaction to obtain lead sulfate;
the reducing agent in the step (1) comprises ascorbic acid and thiourea dioxide, wherein the mass ratio of the ascorbic acid to the thiourea dioxide is 1-1.5: 7-8;
the mass concentration of the sulfuric acid solution is 12-17%;
the mass volume ratio of the manganese anode slag to the water is 1kg: 4-5L;
the mass ratio of the manganese anode slag to the reducing agent is 100: 15-22;
the mass volume ratio of the manganese anode slag to the sulfuric acid solution is 1kg: 2-3L;
the mass concentration of the sulfuric acid solution in the step (4) is 5-10%;
the reducing agent is ammonium hypophosphite;
in the step (4), the mass ratio of the filter residue to the reducing agent is 5:1 to 1.5;
the mass volume ratio of the filter residue to the sulfuric acid solution is 1kg:2 to 2.5L.
2. The method of claim 1, wherein the ultrasound in step (2) has a frequency of 30 to 40kHz for a period of 1 to 2 hours.
3. The method of claim 2, wherein the alkaline agent in step (3) is aqueous ammonia or manganese carbonate;
the pH value after adding the alkaline agent is 4.5-5.0.
4. A method according to claim 1 or 3, wherein in step (3) the filtrate and alkaline agent are mixed and reacted for a period of 40 to 50 minutes.
5. The method of claim 4, wherein the pH after adding ammonium sulfide in step (3) is 6.5 to 7;
and adding ammonium sulfide for reaction for 30-40 min.
6. The method according to claim 5, wherein the stirring speed of the reaction in the step (4) is 210 to 260rpm for 150 to 180 minutes.
CN202210858773.8A 2022-07-21 2022-07-21 Method for preparing manganese sulfate solution from anode slag and recovering lead Active CN115058600B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210858773.8A CN115058600B (en) 2022-07-21 2022-07-21 Method for preparing manganese sulfate solution from anode slag and recovering lead

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210858773.8A CN115058600B (en) 2022-07-21 2022-07-21 Method for preparing manganese sulfate solution from anode slag and recovering lead

Publications (2)

Publication Number Publication Date
CN115058600A CN115058600A (en) 2022-09-16
CN115058600B true CN115058600B (en) 2023-06-23

Family

ID=83206910

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210858773.8A Active CN115058600B (en) 2022-07-21 2022-07-21 Method for preparing manganese sulfate solution from anode slag and recovering lead

Country Status (1)

Country Link
CN (1) CN115058600B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103789551B (en) * 2014-02-18 2016-01-20 广西大学 Prepare manganese sulfate electrolyte with electrolytic manganese anode mud and reclaim plumbous method
CN108910958A (en) * 2018-07-17 2018-11-30 重庆上甲电子股份有限公司 A method of manganese sulfate is produced using aniline reduction electrolytic manganese anode mud
CN110408786A (en) * 2019-08-29 2019-11-05 贵州大学 A kind of method that the catalysis of electrolytic manganese anode slag prepares manganese sulfate solution and recycles lead
AU2020102180A4 (en) * 2020-09-09 2020-10-15 Jishou University Method for leaching manganese from electrolytic manganese anode slag
CN114058857A (en) * 2021-11-12 2022-02-18 水口山有色金属有限责任公司 Method for recovering lead and manganese from electrolytic manganese anode slime
CN114180629B (en) * 2021-12-10 2024-04-05 深圳市长隆科技有限公司 Method for separating, recovering chromium and nickel under strong acid environment and recycling waste acid

Also Published As

Publication number Publication date
CN115058600A (en) 2022-09-16

Similar Documents

Publication Publication Date Title
CN110093506A (en) Valuable metal high efficiency extraction and its minimizing processing method in germanic zinc leaching residue
CN101407355B (en) Method for comprehensively utilizing iron vitriol dreg of yellow sodium
CN101787546B (en) Method utilizing titanium white waste acid to prepare electrolytic manganese metal
CN111003834B (en) Method for removing arsenic and chlorine from waste acid
CN105219969A (en) Vanadium wastewater and tailings in vanadium extraction is utilized to extract the method for manganese metal
CN102912133A (en) Method for classifying and purifying heavy metals in electroplating sludge
CN106517301A (en) Method for recovering basic cupric chloride from waste cupric liquor of sulfuric acid system
CN106077036A (en) A kind of method of ultrasonic assistant acidleach process aluminum electrolytic waste and old cathode carbon block
CN105016387A (en) Chromium salt mud treatment method
CN113621822A (en) Method for recovering manganese in electrolytic manganese slag
CN109988902B (en) Method for dealkalizing iron-reinforced red mud and separating and recovering iron
CN113846214B (en) Method for treating zinc-containing material in zinc hydrometallurgy production
CN105349792A (en) Process for recycling brass furnace slag
CN113943864A (en) Method for removing fluorine in waste lithium battery
CN103667695A (en) Method for extracting arsenic from gold ore
CN111573736B (en) Method for preparing industrial manganese carbonate by using copper-manganese chloride solution
CN115058600B (en) Method for preparing manganese sulfate solution from anode slag and recovering lead
CN112301220A (en) Method for reducing iron content in rare earth sulfate water leaching solution
CN106676275A (en) Vanadium extraction method based on waste steel slag and acid-base property waste water
CN108163880B (en) Method for preparing gypsum powder by using zinc smelting waste acid
CN114558440B (en) High-efficiency zinc extraction coupling pulp flue gas desulfurization carbon fixation process by high-chlorine zinc gray ammonia-ammonium sulfate method
CN110042242B (en) Method for separating aluminum, chromium and nickel in sludge treated on surface of aluminum profile
CN114606388A (en) Method for leaching arsenic-containing copper smelting smoke and synchronously removing arsenic
CN113025827B (en) Method for recovering vanadium from vanadium-containing waste
CN111072200B (en) Method for removing arsenic and chlorine by adding metal powder and inorganic salt into waste acid

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