CN111874877A - Method for efficiently removing arsenic from Na2SeSO3 solution - Google Patents
Method for efficiently removing arsenic from Na2SeSO3 solution Download PDFInfo
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- CN111874877A CN111874877A CN202010812890.1A CN202010812890A CN111874877A CN 111874877 A CN111874877 A CN 111874877A CN 202010812890 A CN202010812890 A CN 202010812890A CN 111874877 A CN111874877 A CN 111874877A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/008—Salts of oxyacids of selenium or tellurium
Abstract
The invention discloses Na2SeSO3Method for efficiently removing arsenic from solution, namely Na2SeSO3The method for efficiently removing arsenic from solution comprises the steps of primary reaction and secondary reaction, and specifically comprises the following steps: measuring Na to be treated2SeSO3Adding an S-TAB medicament into the solution, stirring and reacting at the temperature of 80-85 ℃ to obtain a solution a, and filtering to obtain a filtrate b and an impurity precipitate c; adding CT-100 agent into the filtrate b, stirring and reacting at the temperature of 60-65 ℃ to obtain a solution d, and filtering to obtain Na after arsenic removal of the target object2SeSO3A solution; the method has the advantages of simple operation method, high arsenic impurity removal rate, good stability and capability of efficiently treating Na2SeSO3Arsenic impurities in the solution lay a solid technical foundation for selenium resource recovery.
Description
Technical Field
The invention belongs to the technical field of smelting, and particularly relates to Na2SeSO3A method for efficiently removing arsenic from solution.
Background
Due to the shortage of selenium resources, the selenium extraction from the copper anode slime is a main way for selenium resource recovery due to the existence of selenium ions in the anode slime generated in the copper smelting process. Pretreating anode mud to obtain a crude selenium raw material, mixing and stirring the crude selenium raw material and sodium carbonate according to a certain proportion, grinding calcine, washing with water to obtain a sodium selenite solution and a sodium selenate solution, then carrying out decomposition reaction, filtering and separating, washing filter residues, and drying to obtain a refined selenium product. However, the sodium selenate solution contains As, Cu, Pb, Si, Sb and other impurities at the same time, so that the Na-removing catalyst is developed and can effectively remove Na2SeSO3A method of arsenic impurity in solution is highly desirable.
Disclosure of Invention
The invention aims to provide Na2SeSO3A method for efficiently removing arsenic from solution.
The object of the present invention is achieved by that said Na2SeSO3The method for efficiently removing arsenic from solution comprises the steps of primary reaction and secondary reaction, and specifically comprises the following steps:
A. primary reaction: measuring Na to be treated2SeSO3Adding an S-TAB medicament into the solution, stirring and reacting at the temperature of 80-85 ℃ to obtain a solution a, and filtering to obtain a filtrate b and an impurity precipitate c;
the specific chemical reaction principle is as follows:
AsO4 3-+Fe3+=FeAsO4↓
AsO3 3-+Fe3+=FeAsO3↓
2AsO4 3-+3Ca2+=Ca(AsO4)2↓
2AsO3 3-+Ca2+=Ca3(AsO3)2↓
B. and (3) secondary reaction: adding CT-100 agent into the filtrate b, stirring and reacting at the temperature of 60-65 ℃ to obtain a solution d, and filtering to obtain Na after arsenic removal of the target object2SeSO3A solution;
the specific chemical reaction principle is as follows:
3S2-+2As3+=As2S3↓
5S2-+2As3+=As2S5↓
the S-TAB medicament is prepared by mixing FeAC, PE200 and CaSO4, stirring for 2 hours at 90 ℃, filtering, drying, calcining at 400-500 ℃, and grinding after calcining.
The CT-100 medicament is prepared by mixing EDTA, FeS and CaO, stirring for 3h at 70 ℃, filtering, drying, calcining at 600-650 ℃, and grinding after calcination.
The invention uses specific S-TAB and CT-100 medicaments to efficiently treat arsenic impurities, and the specific impurity removal principle is as follows:
the specific chemical reaction principle is as follows:
AsO4 3-+Fe3+=FeAsO4↓
AsO3 3-+Fe3+=FeAsO3↓
2AsO4 3-+3Ca2+=Ca(AsO4)2↓
2AsO3 3-+Ca2+=Ca3(AsO3)2↓
3S2-+2As3+=As2S3↓
5S2-+2As3+=As2S5↓
the method has the advantages of simple operation method, high arsenic impurity removal rate, good stability and capability of efficiently treating Na2SeSO3Arsenic impurities in the solution lay a solid technical foundation for selenium resource recovery.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
Na according to the invention2SeSO3The method for efficiently removing arsenic from solution comprises the steps of primary reaction and secondary reaction, and specifically comprises the following steps:
A. primary reaction: measuring Na to be treated2SeSO3Adding an S-TAB medicament into the solution, stirring and reacting at the temperature of 80-85 ℃ to obtain a solution a, and filtering to obtain a filtrate b and an impurity precipitate c;
B. and (3) secondary reaction: adding CT-100 agent into the filtrate b, stirring and reacting at the temperature of 60-65 ℃ to obtain a solution d, and filtering to obtain Na after arsenic removal of the target object2SeSO3A solution;
the S-TAB medicament is prepared by mixing FeAC, PE200 and CaSO4, stirring for 2h at 90 ℃, filtering, drying, calcining at 400-500 ℃, and grinding after calcining.
The CT-100 medicament is prepared by mixing EDTA, FeS and CaO, stirring for 3h at 70 ℃, filtering, drying, calcining at 600-650 ℃, and grinding after calcination.
The addition amount of S-TAB medicament in the step A and Na to be treated2SeSO3The mass volume ratio of the solution is (2-5) g: (500-1000) ml.
And the stirring reaction time in the step A is 10-30 min.
The addition amount of the CT-100 medicament in the step B and Na to be treated2SeSO3The volume ratio of the solution is (2.5-6) ml: (500-1000) ml.
And the stirring reaction time in the step B is 10-30 min.
Example 1
Measuring Na2SeSO3Adding 3.5g S-TAB into 500 mL of solution (containing arsenic impurity content of 3.5%), maintaining the temperature at 85 deg.C, stirring for 30min, filtering the solution, filtering out impurities in precipitate, and collecting the residual Na2SeSO3The solution continues to react over Na2SeSO3Adding 5mLCT-100 into the solution, stirring at 65 deg.C for 30min, and filtering the solution again after the reaction is finished to obtain Na with impurities removed2SeSO3Solution (arsenic impurity content 0.26%).
Example 2
Measuring Na2SeSO3Adding 5g S-TAB into 1000 mL of solution (containing arsenic impurity content of 4.1%), maintaining the temperature at 80 deg.C, stirring for reaction for 30min, filtering the solution, filtering out impurities in precipitate, and collecting Na2SeSO3The solution continues to react over Na2SeSO3Adding 6mLCT-100 into the solution, stirring at 60 deg.C for 30min, and filtering the solution again after the reaction is finished to obtain Na with impurities removed2SeSO3Solution (arsenic impurity content 0.24%).
Example 3
Measuring Na2SeSO3Adding 2g S-TAB into 600 mL of solution (containing arsenic impurity content of 3.2%), maintaining the temperature at 82 deg.C, stirring for 10 min, filtering the solution, filtering out impurities in precipitate, and collecting Na2SeSO3The solution continues to react over Na2SeSO3Adding 2.5mLCT-100 into the solution, stirring at 63 deg.C for 20 min, and filtering the solution to obtain Na without impurities2SeSO3Solution (arsenic impurity content 0.27%).
Example 4
Measuring Na2SeSO3Adding 4g S-TAB into 800 mL of solution (containing arsenic impurity content of 3.8%), maintaining the temperature at 83 deg.C, stirring for 20 min, filtering the solution, filtering out impurities in precipitate, and collecting Na2SeSO3The solution continues to react over Na2SeSO3Adding 4mLCT-100 into the solution, stirring at 65 deg.C for 10 min, and filtering the solution again after the reaction is finished to obtain Na with impurities removed2SeSO3Solution (arsenic impurity content 0.23%).
Example 5
Measuring Na2SeSO3900 mL of the solution (containing 3.7% of arsenic impurities), adding 5g S-TAB into the solution, maintaining the temperature at 80 deg.C, stirring for reaction for 30min, filtering the solution, filtering out impurities in the precipitate, and removing the residual Na2SeSO3The solution continues to react over Na2SeSO3Adding 4mLCT-100 into the solution, stirring at 62 deg.C for 20 min, and filtering the solution again after the reaction is finished to obtain Na with impurities removed2SeSO3Solution (arsenic impurity content 0.21%).
Claims (6)
1. Na2SeSO3The method for efficiently removing arsenic from solution is characterized in that Na2SeSO3The method for efficiently removing arsenic from solution comprises the steps of primary reaction and secondary reaction, and specifically comprises the following steps:
A. primary reaction: measuring Na to be treated2SeSO3Adding an S-TAB medicament into the solution, stirring and reacting at the temperature of 80-85 ℃ to obtain a solution a, and filtering to obtain a filtrate b and an impurity precipitate c;
B. and (3) secondary reaction: adding CT-100 agent into the filtrate b, stirring and reacting at the temperature of 60-65 ℃ to obtain a solution d, and filtering to obtain Na after arsenic removal of the target object2SeSO3A solution;
the S-TAB medicament is prepared by mixing FeAC, PE200 and CaSO4, stirring for 2 hours at 90 ℃, filtering, drying, calcining at 400-500 ℃, and grinding after calcining.
2. The CT-100 medicament is prepared by mixing EDTA, FeS and CaO, stirring for 3 hours at 70 ℃, filtering, drying, calcining at 600-650 ℃, and grinding after calcination.
3. Na according to claim 12SeSO3The method for efficiently removing arsenic from solution is characterized in that S-Adding amount of TAB medicament and Na to be treated2SeSO3The mass volume ratio of the solution is (2-5) g: (500-1000) ml.
4. Na according to claim 12SeSO3The method for efficiently removing arsenic from the solution is characterized in that the stirring reaction time in the step A is 10-30 min.
5. Na according to claim 12SeSO3The method for efficiently removing arsenic from solution is characterized in that the addition amount of CT-100 medicament in the step B and Na to be treated2SeSO3The volume ratio of the solution is (2.5-6) ml: (500-1000) ml.
6. Na according to claim 12SeSO3The method for efficiently removing arsenic from the solution is characterized in that the stirring reaction time in the step B is 10-30 min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115108535A (en) * | 2022-07-29 | 2022-09-27 | 昆明冶金研究院有限公司 | Method for purifying 3N selenium from crude selenium |
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Application publication date: 20201103 |