CN111069228A - Method for wrapping stabilized scorodite by copper slag gel - Google Patents
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- CN111069228A CN111069228A CN201911154473.6A CN201911154473A CN111069228A CN 111069228 A CN111069228 A CN 111069228A CN 201911154473 A CN201911154473 A CN 201911154473A CN 111069228 A CN111069228 A CN 111069228A
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- scorodite
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- 239000002893 slag Substances 0.000 title claims abstract description 72
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 70
- 239000010949 copper Substances 0.000 title claims abstract description 70
- UYZMAFWCKGTUMA-UHFFFAOYSA-K iron(3+);trioxido(oxo)-$l^{5}-arsane;dihydrate Chemical compound O.O.[Fe+3].[O-][As]([O-])([O-])=O UYZMAFWCKGTUMA-UHFFFAOYSA-K 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 25
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 38
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002699 waste material Substances 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000007885 magnetic separation Methods 0.000 claims abstract description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 11
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- 230000032683 aging Effects 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 5
- 238000000576 coating method Methods 0.000 claims 5
- 238000007873 sieving Methods 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000002386 leaching Methods 0.000 description 17
- 231100000331 toxic Toxicity 0.000 description 14
- 230000002588 toxic effect Effects 0.000 description 14
- 238000003723 Smelting Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 231100000419 toxicity Toxicity 0.000 description 6
- 230000001988 toxicity Effects 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910017082 Fe-Si Inorganic materials 0.000 description 3
- 229910017133 Fe—Si Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011112 process operation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 231100000820 toxicity test Toxicity 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000007443 Neurasthenia Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/11—Removing sulfur, phosphorus or arsenic other than by roasting
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for wrapping stabilized scorodite by copper slag gel, belonging to the technical field of heavy metal pollution treatment. Sieving ground magnetite to obtain magnetite slag powder; mixing magnetite slag powder with H2O2Adding the mixture into waste acid, uniformly mixing, stirring at normal pressure and room temperature, and carrying out oxidation pretreatment reaction for 6-8 hours to obtain a solid-liquid mixture; adjusting the pH value of the solid-liquid mixture to 1.3-1.7, stirring and dearsenizing the mixture for 12-14 hours under the conditions of normal pressure and 85-95 ℃, carrying out solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and carrying out deep dearsenization treatment on the filtrate; drying the arsenic-containing magnetite, performing magnetic separation, separating magnetite and scorodite, and returning the magnetite to perform oxidation pretreatment reaction; h is to be2SO4Slowly adding the solution into the copper slag powder and stirring until copper slag gel is formed; mixing copper slag gel and herba Alii FistulosiUniformly mixing the stones to obtain copper slag-scorodite gel, and aging for 10-20 hours at the temperature of 120-160 ℃. According to the invention, copper slag is adopted to wrap scorodite to form gel, so that the subsequent stabilization treatment of scorodite is realized.
Description
Technical Field
The invention relates to a method for wrapping stabilized scorodite by copper slag gel, belonging to the technical field of heavy metal pollution treatment.
Background
Arsenic is a metal-like substance and can form a series of highly toxic compounds, arsenic can be absorbed by human bodies from respiratory tracts, skins and digestive tracts, neurasthenia syndrome, skin mucosa lesion and the like can be caused, and inorganic compounds of arsenic can cause lung cancer and skin cancer. Industrial production in factories can discharge a large amount of arsenic-containing substances, and the best prospect is currently to utilize the reaction of Fe and As to generate scorodite aiming at the treatment method of arsenic-containing waste. Although the toxic leaching after the scorodite is generated by the method is within the range of national standard regulation (<5mg/L), the toxic leaching still reaches 3-4 mg/L, and in order to further reduce the toxic leaching to below 1 mg/L, the scorodite is firmly wrapped by gel, so that the toxic leaching of the scorodite can be greatly reduced, and the stockpiling time of the scorodite in the environment is prolonged.
The copper slag is slag generated in the copper smelting process, and belongs to non-ferrous metal slag. The copper slag comprises Fe, Si, O and other elements, the main components are iron and silicon oxide, the total weight of the copper slag is 83.57%, and the content of MgO, CaO and K is less than 6%2And (3) O basic oxide. China is a large copper ore resource consumption country, the consumption of copper is very large, meanwhile, in copper production mainly by a pyrogenic process, 2-3 t of slag is produced when 1t of copper is produced, the quantity of copper slag is large, and the development of a resource comprehensive utilization technology of the copper-containing slag has very important significance.
However, in the prior art, the application of copper slag to wrap and stabilize scorodite is not available.
Disclosure of Invention
The invention provides a method for wrapping stabilized scorodite by copper slag gel, which aims at solving the problems in the prior art, utilizes solid waste copper slag to synthesize gel and wrap scorodite, can effectively reduce the toxic leaching of scorodite in the environment, prolongs the stockpiling time of scorodite, simultaneously treats waste by waste, has simple process operation and low production cost, and has wider market prospect.
A method for wrapping stabilized scorodite by copper slag gel comprises the following specific steps:
(1) screening the ground magnetite to obtain magnetite slag powder;
(2) mixing the magnetite slag powder obtained in the step (1) with H2O2Adding into waste acid, mixing wellStirring and oxidizing the mixture at room temperature under normal pressure for 6-8 h to obtain a solid-liquid mixture;
(3) adjusting the pH value of the solid-liquid mixture in the step (2) to 1.3-1.7, stirring and dearsenizing the mixture at the temperature of 85-95 ℃ under normal pressure for 12-14 h, performing solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and performing deep dearsenization treatment on the filtrate;
(4) drying the arsenic-containing magnetite in the step (3), performing magnetic separation, separating magnetite and scorodite, and returning the magnetite to the step (2) for oxidation pretreatment reaction;
(5) under stirring, adding H2SO4Slowly adding the solution into the copper slag powder to form copper slag gel;
(6) and (3) uniformly mixing the copper slag gel obtained in the step (5) with scorodite to obtain a copper slag-scorodite gel, and aging for 10-20 h at the temperature of 120-160 ℃.
The step (2) H2O2The molar ratio of the arsenic to the arsenic in the waste acid is (1.1-1.2): 1.
The arsenic content of the waste acid in the step (2) is 4570.0-10290.0 mg/L, and the solid-to-liquid ratio g/mL of the magnetite slag powder to the waste acid is (1.17-1.67): 1.
And (3) stirring speed in the step (3) is 180-200 r/min.
And (4) the magnetic separation strength of the magnetic separation in the step (4) is 800-1100 mT.
Said step (5) H2SO4The concentration of the solution is 1-2 mol/L.
The molar ratio of Si in the copper slag gel to As in the scorodite in the step (6) is (1-2): 1.
The principle of wrapping stabilized scorodite by copper slag gel is as follows: the copper slag belongs to solid waste, wherein the contents of Fe and Si are very rich, Fe in the copper slag can react with Si per se to generate an Fe-Si compound under an acidic condition, and because the Fe in the copper slag contains Fe per se, the Fe in the scorodite cannot be combined during the reaction, so that the stability of the scorodite per se is effectively maintained; meanwhile, after the gel is formed, the Fe-Si compound gel is wrapped around the scorodite, so that the stability of the scorodite is greatly improved.
The invention has the beneficial effects that:
(1) according to the invention, the scorodite is wrapped by the copper slag, so that the stability of the scorodite in the environment can be greatly improved, and meanwhile, the waste is treated by the waste;
(2) in the invention, the Fe-Si gel generated by the copper slag is in-situ reaction, so that the complexity of the process operation is greatly reduced;
(3) the invention adopts the gel to wrap the stabilized scorodite, has simple process operation and low production cost, and has wider market prospect.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example 1: in the embodiment, the components of magnetite are shown in table 1, the components of copper slag are shown in table 2, the waste acid is the waste acid containing a large amount of impurities such as arsenic and the like generated after the smelting flue gas is washed by a sulfuric acid workshop of a certain zinc smelting plant in the southwest region, and the main components are shown in table 3;
TABLE 1 Magnetite composition
A method for wrapping stabilized scorodite by copper slag gel comprises the following specific steps:
(1) sieving the ground magnetite, and taking 200-mesh screen underflow to obtain magnetite slag powder;
(2) mixing the magnetite slag powder obtained in the step (1) with H2O2Adding the mixture into waste acid, uniformly mixing, stirring at normal pressure and room temperature, and carrying out oxidation pretreatment reaction for 6 hours to obtain a solid-liquid mixture; wherein H2O2The molar ratio of the iron oxide to arsenic in the waste acid is 1.2:1, the arsenic content of the waste acid is 4570.0 mg/L, and the solid-liquid ratio g: mL of the magnetite slag powder to the waste acid is 1.17: 1;
(3) adjusting the pH value of the solid-liquid mixture in the step (2) to 1.3, stirring and dearsenizing the mixture for 14 hours under the conditions of normal pressure and 95 ℃, carrying out solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and carrying out deep dearsenization treatment on the filtrate; wherein the stirring speed is 180 r/min;
(4) placing the arsenic-containing magnetite obtained in the step (3) in a drying oven at the temperature of 60 ℃ for drying for 24 hours, then carrying out magnetic separation to separate magnetite and scorodite, and returning the magnetite to the step (2) for oxidation pretreatment reaction; wherein the magnetic separation intensity of the magnetic separation is 1100 mT;
(5) under stirring, adding H2SO4Slowly adding the solution into the copper slag powder until a copper slag gel is formed, wherein H2SO4The concentration of the solution is 1 mol/L;
(6) uniformly mixing the copper slag gel obtained in the step (5) with scorodite to obtain a copper slag-scorodite gel, aging the copper slag-scorodite gel at the temperature of 120 ℃ for 20 hours, and performing a toxicity leaching experiment; wherein the molar ratio of Si in the copper slag gel to As in the scorodite is 2: 1;
toxicity Leaching tests of arsenic-containing solids were performed according to U.S. epa Method 1311-toxicitycharateristic leach Procedure, provided by the united states environmental protection agency, with toxicity test results as shown in tables 4 and 5,
TABLE 4 toxic leach results for scorodite
In the filtrate of the embodiment, the toxic leaching of scorodite is 3.395 mg/L, the toxic leaching of scorodite coated by sodium silicate gel is 0.194 mg/L, and the stability is improved by 94.3%.
Example 2: in the embodiment, the components of magnetite are shown in table 6, the components of copper slag are shown in table 7, the waste acid is the waste acid containing a large amount of impurities such as arsenic and the like generated after the smelting flue gas is washed by a sulfuric acid workshop of a certain zinc smelting plant in southwest, and the main components are shown in table 8;
TABLE 6 Magnetite composition
A method for wrapping stabilized scorodite by copper slag gel comprises the following specific steps:
(1) sieving the ground magnetite, and taking 200-mesh screen underflow to obtain magnetite slag powder;
(2) mixing the magnetite slag powder obtained in the step (1) with H2O2Adding the mixture into waste acid, uniformly mixing, stirring at normal pressure and room temperature, and carrying out oxidation pretreatment reaction for 8 hours to obtain a solid-liquid mixture; wherein H2O2The molar ratio of the iron oxide to arsenic in the waste acid is 1.1:1, the arsenic content of the waste acid is 6100.0 mg/L, and the solid-liquid ratio g: mL of the magnetite slag powder to the waste acid is 1.67: 1;
(3) adjusting the pH value of the solid-liquid mixture in the step (2) to 1.7, stirring and dearsenizing the mixture for 12 hours under the conditions of normal pressure and 85 ℃, carrying out solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and carrying out deep dearsenization treatment on the filtrate; wherein the stirring speed is 200 r/min;
(4) placing the arsenic-containing magnetite obtained in the step (3) in a drying oven at the temperature of 70 ℃ for drying for 22h, then carrying out magnetic separation to separate magnetite and scorodite, and returning the magnetite to the step (2) for oxidation pretreatment reaction; wherein the magnetic separation intensity of the magnetic separation is 1000 mT;
(5) under stirring, adding H2SO4Slowly adding the solution into the copper slag powder until a copper slag gel is formed, wherein H2SO4The concentration of the solution is 2 mol/L;
(6) uniformly mixing the copper slag gel obtained in the step (5) with scorodite to obtain a copper slag-scorodite gel, aging the copper slag-scorodite gel at the temperature of 160 ℃ for 10 hours, and performing a toxicity leaching experiment; wherein the molar ratio of Si in the copper slag gel to As in the scorodite is 1: 1;
toxicity Leaching tests of arsenic-containing solids were performed according to U.S. epa Method 1311-toxicitycharateristic leach Procedure, provided by the united states environmental protection agency, with toxicity test results as shown in tables 9 and 10,
TABLE 9 toxic leach results for scorodite
In the filtrate of the embodiment, the toxic leaching of scorodite is 4.106 mg/L, the toxic leaching of scorodite coated by sodium silicate gel is 0.304 mg/L, and the stability is improved by 92.6%.
Example 3: in the embodiment, the components of magnetite are shown in table 6, the components of copper slag are shown in table 7, the waste acid is the waste acid containing a large amount of impurities such as arsenic and the like generated after the smelting flue gas is washed by a sulfuric acid workshop of a certain zinc smelting plant in southwest, and the main components are shown in table 8;
in the embodiment, the components of magnetite are shown in table 11, the components of copper slag are shown in table 12, the waste acid is the waste acid containing a large amount of impurities such as arsenic generated after the smelting flue gas is washed by a sulfuric acid plant of a certain zinc smelting plant in the southwest region, and the main components are shown in table 13;
TABLE 11 Magnetite composition
A method for wrapping stabilized scorodite by copper slag gel comprises the following specific steps:
(1) sieving the ground magnetite, and taking 200-mesh screen underflow to obtain magnetite slag powder;
(2) mixing the magnetite slag powder obtained in the step (1) with H2O2Adding the mixture into waste acid, uniformly mixing, stirring at normal pressure and room temperature, and carrying out oxidation pretreatment reaction for 7 hours to obtain a solid-liquid mixture; wherein H2O2The molar ratio of the arsenic to the arsenic in the waste acid is 1.15:1, the arsenic content of the waste acid is 10290.0mg/L, and the solid-liquid ratio g: mL of the magnetite slag powder to the waste acid is 1.33: 1;
(3) adjusting the pH value of the solid-liquid mixture in the step (2) to 1.5, stirring and dearsenizing the mixture for 13 hours under the conditions of normal pressure and temperature of 90 ℃, carrying out solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and carrying out deep dearsenization treatment on the filtrate; wherein the stirring speed is 190 r/min;
(4) placing the arsenic-containing magnetite obtained in the step (3) in a drying oven at the temperature of 65 ℃ for drying for 23h, then carrying out magnetic separation to separate magnetite and scorodite, and returning the magnetite to the step (2) for oxidation pretreatment reaction; wherein the magnetic separation intensity of the magnetic separation is 950 mT;
(5) under stirring, adding H2SO4Slowly adding the solution into the copper slag powder until a copper slag gel is formed, wherein H2SO4The concentration of the solution is 1.5 mol/L;
(6) uniformly mixing the copper slag gel obtained in the step (5) with scorodite to obtain a copper slag-scorodite gel, aging for 15h at the temperature of 160 ℃, and performing a toxicity leaching experiment; wherein the molar ratio of Si in the copper slag gel to As in the scorodite is 1.5: 1;
toxicity Leaching tests of arsenic-containing solids were performed according to U.S. epa Method 1311-toxicitycharateristic leach Procedure, provided by the united states environmental protection agency, with toxicity test results as shown in tables 14 and 15,
TABLE 14 toxic leach results for scorodite
In the filtrate of the embodiment, the toxic leaching of the scorodite is 3.935 mg/L, the toxic leaching of the scorodite after the scorodite is wrapped by the copper slag gel is 0.254 mg/L, and the stability is improved by 93.5%.
Claims (6)
1. A method for wrapping stabilized scorodite by copper slag gel is characterized by comprising the following specific steps:
(1) screening the ground magnetite to obtain magnetite slag powder;
(2) mixing the magnetite slag powder obtained in the step (1) with H2O2Adding the mixture into waste acid, uniformly mixing, stirring at normal pressure and room temperature, and carrying out oxidation pretreatment reaction for 6-8 hours to obtain a solid-liquid mixture;
(3) adjusting the pH value of the solid-liquid mixture in the step (2) to 1.3-1.7, stirring and dearsenizing the mixture at the temperature of 85-95 ℃ under normal pressure for 12-14 h, performing solid-liquid separation to obtain arsenic-containing magnetite and filtrate, and performing deep dearsenization treatment on the filtrate;
(4) drying the arsenic-containing magnetite in the step (3), performing magnetic separation, separating magnetite and scorodite, and returning the magnetite to the step (2) for oxidation pretreatment reaction;
(5) under stirring, adding H2SO4Slowly adding the solution into the copper slag powder to form copper slag gel;
(6) and (3) uniformly mixing the copper slag gel obtained in the step (5) with scorodite to obtain a copper slag-scorodite gel, and aging for 10-20 h at the temperature of 120-160 ℃.
2. The method for coating stabilized scorodite with copper dross gel according to claim 1, wherein: step (2) H2O2The molar ratio of the arsenic to the arsenic in the waste acid is (1.1-1.2): 1.
3. The method for coating stabilized scorodite with copper dross gel according to claim 1, wherein: the arsenic content of the waste acid in the step (2) is 4570.0-10290.0 mg/L, and the solid-to-liquid ratio g: mL of the magnetite slag powder to the waste acid is (1.17-1.67): 1.
4. The method for coating stabilized scorodite with copper dross gel according to claim 1, wherein: the magnetic separation strength of the magnetic separation in the step (4) is 800-1100 mT.
5. The method for coating stabilized scorodite with copper dross gel according to claim 1, wherein: step (5) H2SO4The concentration of the solution is 1-2 mol/L.
6. The method for coating stabilized scorodite with copper dross gel according to claim 1, wherein: and (6) the molar ratio of Si in the copper slag gel to As in the scorodite is (1-2): 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112079486A (en) * | 2020-09-16 | 2020-12-15 | 昆明理工大学 | Method for removing arsenic from waste acid by using copper slag tailings |
| CN112891811A (en) * | 2021-01-18 | 2021-06-04 | 昆明理工大学 | Method for removing arsenic in contaminated acid by using silica gel reinforced zinc slag |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000091A1 (en) * | 2017-06-29 | 2019-01-03 | The Royal Institution For The Advancement Of Learning/Mcgill University | Stabilization of hazardous materials |
| CN109534476A (en) * | 2018-11-01 | 2019-03-29 | 昆明理工大学 | A kind of method that copper ashes handles arsenic in nonferrous smelting waste acid |
| CN110028192A (en) * | 2019-03-11 | 2019-07-19 | 昆明理工大学 | A kind of magnetic Fe3O4The method for handling arsenic in nonferrous smelting waste acid |
| CN110171886A (en) * | 2019-04-22 | 2019-08-27 | 昆明理工大学 | A method of waste acid containing arsenic is disposed using copper ashes step |
| CN110451573A (en) * | 2019-07-25 | 2019-11-15 | 昆明理工大学 | A method of arsenic in nonferrous smelting waste acid is handled by solid-state source of iron of limonite |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000091A1 (en) * | 2017-06-29 | 2019-01-03 | The Royal Institution For The Advancement Of Learning/Mcgill University | Stabilization of hazardous materials |
| CN109534476A (en) * | 2018-11-01 | 2019-03-29 | 昆明理工大学 | A kind of method that copper ashes handles arsenic in nonferrous smelting waste acid |
| CN110028192A (en) * | 2019-03-11 | 2019-07-19 | 昆明理工大学 | A kind of magnetic Fe3O4The method for handling arsenic in nonferrous smelting waste acid |
| CN110171886A (en) * | 2019-04-22 | 2019-08-27 | 昆明理工大学 | A method of waste acid containing arsenic is disposed using copper ashes step |
| CN110451573A (en) * | 2019-07-25 | 2019-11-15 | 昆明理工大学 | A method of arsenic in nonferrous smelting waste acid is handled by solid-state source of iron of limonite |
Non-Patent Citations (4)
| Title |
|---|
| ADELMAN JG ET AL.: "Investigation of sodium silicate-derived gels as encapsulants for hazardous materials-The case of scorodite", <JOURNAL OF HAZARDOUS MATERIALS> * |
| CAI GUIYUAN ET AL: "Self-enhanced and efficient removal of arsenic from waste acid using magnetite as an in situ iron donator", 《WATER RESEARCH》 * |
| SARFO P，WYSS G，MA G，ET AL: "Carbothermal reduction of copper smelter slag for recycling into pig iron and glass", 《MINERALS ENGINEERING》 * |
| 何欢: "铜渣基草酸盐化学键合陶瓷的制备及其固化重金属研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112079486A (en) * | 2020-09-16 | 2020-12-15 | 昆明理工大学 | Method for removing arsenic from waste acid by using copper slag tailings |
| CN112891811A (en) * | 2021-01-18 | 2021-06-04 | 昆明理工大学 | Method for removing arsenic in contaminated acid by using silica gel reinforced zinc slag |
| CN112891811B (en) * | 2021-01-18 | 2022-03-25 | 昆明理工大学 | Method for removing arsenic in contaminated acid by using silica gel reinforced zinc slag |
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