CN110846519A - Method for extracting cadmium from copper smelting soot - Google Patents
Method for extracting cadmium from copper smelting soot Download PDFInfo
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- CN110846519A CN110846519A CN201911142215.6A CN201911142215A CN110846519A CN 110846519 A CN110846519 A CN 110846519A CN 201911142215 A CN201911142215 A CN 201911142215A CN 110846519 A CN110846519 A CN 110846519A
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- cadmium
- stirring
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- slag
- beaker
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- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 78
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003723 Smelting Methods 0.000 title claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 14
- 239000010949 copper Substances 0.000 title claims abstract description 14
- 239000004071 soot Substances 0.000 title claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 239000002893 slag Substances 0.000 claims abstract description 27
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000706 filtrate Substances 0.000 claims abstract description 13
- 238000000967 suction filtration Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000011701 zinc Substances 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 238000009854 hydrometallurgy Methods 0.000 claims abstract description 5
- 239000000047 product Substances 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 150000002739 metals Chemical class 0.000 description 6
- CEKJAYFBQARQNG-UHFFFAOYSA-N cadmium zinc Chemical compound [Zn].[Cd] CEKJAYFBQARQNG-UHFFFAOYSA-N 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
- C22B17/00—Obtaining cadmium
- C22B17/04—Obtaining cadmium by wet processes
-
- 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
-
- 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
- C22B7/02—Working-up flue dust
-
- 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
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- 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 relates to the field of technology, and provides a method for extracting cadmium from copper smelting soot, which comprises the following steps: step a: placing the cadmium-removing pre-solution generated in the zinc hydrometallurgy process in a stirrer, and stirring at a constant speed; step b: adding zinc powder into the cadmium-removed liquid before stirring in the step a and stirring for the second time; c, carrying out suction filtration on the cadmium-removing front liquid after secondary stirring, and separating cadmium slag and filtrate; and d, pressing the cadmium slag into cadmium cakes by using a cake pressing machine, and solving the defects of low cadmium content in the extracted finished product, easy oxidation and low market acceptance degree of the existing extraction method.
Description
Technical Field
The invention relates to the technical field of non-ferrous metal smelting, in particular to a method for extracting cadmium from copper smelting soot.
Background
In the non-ferrous metal smelting industry, in the current zinc hydrometallurgy process, a sulfuric acid dissolving system is a mainstream, in the process, zinc and cadmium enter a solution together, and are enriched in the form of zinc-cadmium slag in the subsequent purification process, the zinc-cadmium slag is one of important raw materials for extracting cadmium, the cadmium in the zinc-cadmium slag is extracted in the form of sponge cadmium, the sponge cadmium is one of sponge metals, and the sponge metals are loose and porous metals (or alloys) similar to sponge, and are prepared by adopting a smelting process. Porous materials made by powder metallurgy processes are known as porous metals (or alloys). The pore size and porosity of porous metals can be controlled, while sponge metals are not easily controlled. The sponge metal has a large specific surface area because of being porous.
Compared with compact metal, it has high adsorption capacity, high air permeability, high chemical activity and easy oxidation, but has poor electric and heat conducting performance and low tensile strength, and the sponge cadmium also has the defect of low cadmium content.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a method for extracting cadmium from copper smelting soot, which is used for solving the defects of low cadmium content, easy oxidation and low market acceptance degree in the extracted finished product in the existing extraction method.
Disclosure of the invention
In order to solve the technical problem, the invention provides a method for extracting cadmium from copper smelting soot, which comprises the following steps:
step a: placing the cadmium-removing pre-solution generated in the zinc hydrometallurgy process in a stirrer, and stirring at a constant speed;
step b: adding zinc powder into the cadmium-removed liquid before stirring in the step a and stirring for the second time;
c, carrying out suction filtration on the cadmium-removing front liquid after secondary stirring, and separating cadmium slag and filtrate;
and d, pressing the cadmium slag into cadmium cakes by using a cake pressing machine.
Further, the stirrer is a beaker, the volume of the solution before cadmium removal is L, the stirring time is H, the stirring speed is V1, the speed of adding the zinc powder is V2, the volume of 500ml is less than or equal to L is less than or equal to 1000ml, the volume of 2H is less than or equal to H is less than or equal to 4H, the volume of 200r/min is less than or equal to V1 is less than or equal to 300r/min, and the volume of 900kg/H is less than or equal to V2 is less than or equal to 1200 kg/H.
Further, the method comprises the following steps: and (3) placing 500ml of the solution before cadmium removal in a beaker, stirring at the speed of 200r/min, adding zinc powder into the beaker at the speed of 900kg/h, stirring for 2h for the second time, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
Further, the method comprises the following steps: placing 800ml of the solution before cadmium removal in a beaker, stirring at the speed of 260r/min, adding zinc powder into the beaker at the speed of 1000kg/h, stirring for the second time for 3h, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
Further, the method comprises the following steps: placing 1000ml of the solution before cadmium removal in a beaker, stirring at the speed of 300r/min, adding zinc powder into the beaker at the speed of 1200kg/h, stirring for a second time for 4h, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
(III) advantageous effects
The invention provides a method for extracting cadmium from copper smelting soot, which comprises the following steps of: placing the cadmium-removing pre-solution generated in the zinc hydrometallurgy process in a stirrer, and stirring at a constant speed; step b: adding zinc powder into the cadmium-removed liquid before stirring in the step a and stirring for the second time; c, carrying out suction filtration on the cadmium-removing front liquid after secondary stirring, and separating cadmium slag and filtrate; and d, pressing the cadmium slag into cadmium cakes by using a cake press, and further processing the sponge cadmium generated after the cadmium is extracted from the existing copper smelting soot into the cadmium cakes, so that the problems of low cadmium content, easy oxidation, higher market acceptance degree and higher economic value in the existing extracted finished product are solved, and the environmental protection concept of changing waste into valuables is also practiced to a real place while the economic income is brought to a company.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a process flow diagram of a method for extracting cadmium from copper smelting soot according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1.
500mL of the liquid before cadmium removal is put in a beaker, the liquid is stirred at the speed of 200r/min, zinc powder with the proportion of 1.2 to the theoretical value (the theoretical value is calculated according to the equation: Zn + Cd2+ -, Zn2+ + Cd) is added at the speed of 900kg/h, the stirring is carried out for 2h, the solution is filtered to obtain cadmium slag and filtrate, the grade of the cadmium slag is 65.8 percent, the requirement of pressing cadmium cakes is met (the cadmium slag grade is known to reach more than 65 percent, the cadmium cakes with good color can be pressed), the cadmium slag is put into a YYYJ-V type cake pressing machine produced by Beijing Changping hydraulic mechanical factory Limited to be pressed, and the cadmium cake product is obtained.
Example 2.
Putting 800mL of the liquid before cadmium removal into a beaker, stirring at the speed of 260r/min, adding zinc powder with the theoretical value ratio of 1.1 at the speed of 1000kg/h, stirring for 3h, carrying out suction filtration on the solution to obtain cadmium slag and filtrate, wherein the grade of the cadmium slag is 67.2 percent and meets the requirement of pressing cadmium cakes, and putting the cadmium slag into a YYYJ-V type cake pressing machine produced by Beijing Changping hydraulic machinery plant Limited to press to obtain cadmium cake products.
Example 3.
And (2) putting 1000mL of the cadmium-removing precursor solution into a beaker, stirring at the speed of 300r/min, adding zinc powder with the theoretical value ratio of 1.0 at the speed of 1200kg/h, stirring for 4h, carrying out suction filtration on the solution to obtain cadmium slag and filtrate, wherein the grade of the cadmium slag is 68.5 percent and meets the requirement of pressing cadmium cakes, and pressing the cadmium slag in a YYYJ-V type cake pressing machine produced by Beijing Changping hydraulic machinery plant Limited to obtain the cadmium cake product.
The technical scheme in the 3 embodiments can extract cadmium from copper smelting soot, and finally the cadmium cake finished product enters the market, so that the market acceptance degree is higher, the economic value is higher, and the environment is more protected.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The method for extracting cadmium from copper smelting soot is characterized by comprising the following steps of:
step a: placing the cadmium-removing pre-solution generated in the zinc hydrometallurgy process in a stirrer, and stirring at a constant speed;
step b: adding zinc powder into the cadmium-removed liquid before stirring in the step a and stirring for the second time;
c, carrying out suction filtration on the cadmium-removing front liquid after secondary stirring, and separating cadmium slag and filtrate;
and d, pressing the cadmium slag into cadmium cakes by using a cake pressing machine.
2. The method of claim 1, wherein the stirrer is a beaker, the volume of the solution before cadmium removal is L, the stirring time is H, the stirring speed is V1, the rate of adding zinc powder is V2, 500ml ≦ L ≦ 1000ml,2H ≦ H ≦ 4H,200r/min ≦ V1 ≦ 300r/min,900kg/H ≦ V2 ≦ 1200 kg/H.
3. The method for extracting cadmium from copper smelting soot according to claim 2, comprising the following steps: and (3) placing 500ml of the solution before cadmium removal in a beaker, stirring at the speed of 200r/min, adding zinc powder into the beaker at the speed of 900kg/h, stirring for 2h for the second time, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
4. The method for extracting cadmium from copper smelting soot according to claim 2, comprising the following steps: placing 800ml of the solution before cadmium removal in a beaker, stirring at the speed of 260r/min, adding zinc powder into the beaker at the speed of 1000kg/h, stirring for the second time for 3h, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
5. The method for extracting cadmium from copper smelting soot according to claim 2, comprising the following steps: placing 1000ml of the solution before cadmium removal in a beaker, stirring at the speed of 300r/min, adding zinc powder into the beaker at the speed of 1200kg/h, stirring for a second time for 4h, carrying out suction filtration on the solution after secondary stirring, separating cadmium slag and filtrate, and pressing the filter residue into cadmium cakes by using a cake press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911142215.6A CN110846519A (en) | 2019-11-20 | 2019-11-20 | Method for extracting cadmium from copper smelting soot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911142215.6A CN110846519A (en) | 2019-11-20 | 2019-11-20 | Method for extracting cadmium from copper smelting soot |
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| CN110846519A true CN110846519A (en) | 2020-02-28 |
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| CN201911142215.6A Pending CN110846519A (en) | 2019-11-20 | 2019-11-20 | Method for extracting cadmium from copper smelting soot |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709382A (en) * | 2009-12-17 | 2010-05-19 | 新乡超能电源有限公司 | Recovery and comprehensive treatment process of valuable metals in zinciferous materials |
| CN102492849A (en) * | 2011-12-28 | 2012-06-13 | 株洲冶炼集团股份有限公司 | Wet treatment method of cadmium slag |
| CN102517455A (en) * | 2011-12-29 | 2012-06-27 | 株洲冶炼集团股份有限公司 | Method for recovering cadmium from copper cadmium residues |
| CN103924095A (en) * | 2014-04-28 | 2014-07-16 | 北京矿冶研究总院 | Novel method for recovering cadmium from copper-cadmium slag |
| CN107815548A (en) * | 2017-11-09 | 2018-03-20 | 合山锌业科技有限公司 | The method that zinc cadmium waste residue produces feed grade monohydrate zinc sulphate and cadmium |
| CN108277345A (en) * | 2018-01-29 | 2018-07-13 | 昆明理工大学 | A method of the copper removal cadmium from zinc sulfate leaching liquid |
-
2019
- 2019-11-20 CN CN201911142215.6A patent/CN110846519A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709382A (en) * | 2009-12-17 | 2010-05-19 | 新乡超能电源有限公司 | Recovery and comprehensive treatment process of valuable metals in zinciferous materials |
| CN102492849A (en) * | 2011-12-28 | 2012-06-13 | 株洲冶炼集团股份有限公司 | Wet treatment method of cadmium slag |
| CN102517455A (en) * | 2011-12-29 | 2012-06-27 | 株洲冶炼集团股份有限公司 | Method for recovering cadmium from copper cadmium residues |
| CN103924095A (en) * | 2014-04-28 | 2014-07-16 | 北京矿冶研究总院 | Novel method for recovering cadmium from copper-cadmium slag |
| CN107815548A (en) * | 2017-11-09 | 2018-03-20 | 合山锌业科技有限公司 | The method that zinc cadmium waste residue produces feed grade monohydrate zinc sulphate and cadmium |
| CN108277345A (en) * | 2018-01-29 | 2018-07-13 | 昆明理工大学 | A method of the copper removal cadmium from zinc sulfate leaching liquid |
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Application publication date: 20200228 |