阅读说明：本技术 一种Na2SeSO3溶液高效脱铅的方法 (Na2SeSO3Method for efficiently removing lead from solution ) 是由 和秋谷 许娜 任婷 和晓才 徐庆鑫 袁野 施辉献 任玖阳 郝竞一 韩诗华 张徽 于 2020-08-13 设计创作，主要内容包括：本发明公开了一种Na<Sub>2</Sub>SeSO<Sub>3</Sub>溶液高效脱铅的方法,所述的Na<Sub>2</Sub>SeSO<Sub>3</Sub>溶液高效脱铅的方法包括前处理和主反应步骤,具体包括：量取待处理Na<Sub>2</Sub>SeSO<Sub>3</Sub>溶液,以3~5℃/min的升温速率升温至50~60℃得到溶液a；维持溶液a的温度为50~60℃加入硫化盐药剂,于温度50~60℃下进行搅拌反应得到溶液b,经固液分离得到目标物除铅后的Na<Sub>2</Sub>SeSO<Sub>3</Sub>溶液。本发明操作方法简单,除铅杂质率高,方法的稳定性好,能高效处理Na<Sub>2</Sub>SeSO<Sub>3</Sub>溶液中的铅杂质,为硒资源回收奠定了坚实技术基础。(The invention discloses Na 2 SeSO 3 Method for efficiently removing lead from solution, namely Na 2 SeSO 3 The method for efficiently removing lead from the solution comprises the steps of pretreatment and main reaction, and specifically comprises the following steps: measuring Na to be treated 2 SeSO 3 Heating the solution to 50-60 ℃ at a heating rate of 3-5 ℃/min to obtain a solution a; maintaining the temperature of the solution a at 50-60 ℃, adding a sulfide salt medicament, stirring and reacting at the temperature of 50-60 ℃ to obtain a solution b, and carrying out solid-liquid separation to obtain Na after lead removal of a target object 2 SeSO 3 And (3) solution. The method has the advantages of simple operation method, high lead impurity removal rate, good method stability and capability of efficiently treating Na 2 SeSO 3 Lead impurities in the solution lay a solid technical foundation for selenium resource recovery.)

1. Na₂SeSO₃The method for efficiently removing lead from solution is characterized in that Na is adopted₂SeSO₃The method for efficiently removing lead from the solution comprises the steps of pretreatment and main reaction, and specifically comprises the following steps:

A. measuring Na to be treated₂SeSO₃Heating the solution to 50-60 ℃ at a heating rate of 3-5 ℃/min to obtain a solution a;

B. main reaction: maintaining the temperature of the solution a at 50-60 ℃, adding a sulfide salt medicament, stirring and reacting at the temperature of 50-60 ℃ to obtain a solution b, and carrying out solid-liquid separation to obtain Na after lead removal of a target object₂SeSO₃And (3) solution.

2. Na according to claim 1₂SeSO₃The method for efficiently removing lead from the solution is characterized in that the sulfide salt medicament in the step B is one or more of sodium sulfide, potassium sulfide, ferrous sulfide, copper sulfide, calcium sulfide, aluminum sulfide, cuprous sulfide and sodium persulfate.

3. Na according to claim 1 or 2₂SeSO₃The method for efficiently removing lead from solution is characterized in that the sulfide salt medicament is sodium sulfide.

4. Na according to claim 1₂SeSO₃The method for efficiently removing lead from solution is characterized in that the adding amount of sulfide salt medicament in the step B and Na to be treated₂SeSO₃The mass volume ratio of the solution is (0.5-2) g: (500-1000) ml.

5. Na according to claim 1₂SeSO₃The method for efficiently removing lead from the solution is characterized in that the stirring reaction time in the step B is 0.5-1 h.

6. Na according to claim 1₂SeSO₃The method for efficiently removing lead from the solution is characterized in that the solid-liquid separation in the step B is performed by adopting suction filtration.

Technical Field

The invention belongs to the technical field of smelting, and particularly relates to Na₂SeSO₃A method for efficiently removing lead from solution.

Background

Selenium is mainly used in the electronics industry, most commonly in selenium rectifiers, followed by printing plates, phototubes, solar cells and television cameras. The current selenium technology in China mainly comprises a pyrogenic process, a sulfur dioxide reduction method, a vacuum distillation method, a solvent extraction method, an ion exchange method and the like. The methods have the defects of complex process flow, serious environmental pollution caused by sulfur dioxide, high equipment requirement and poor labor condition. Therefore, the Na which has no pollution, simple equipment and convenient operation is developed₂SO₃The leaching method overcomes the defects of the process and can obtain a high-purity product. However, selenium is mainly enriched in the anode slime of the electrorefining of nonferrous metals, in the combined treatment process flow of copper anode slime dressing and metallurgy, after chlorination treatment, part of rare metals such as selenium, tellurium and the like are separated from precious metals, and 70-90% of crude selenium is used as a main raw material for preparing high-purity selenium. The crude selenium usually contains Te 0.5-2%, Pb 4-13%, As 0.2-5%, and Sb 1-5%. With Na₂SO₃In the process of leaching selenium, part of Pb is leached into Na₂SeSO₃Solution for effective removal of Na₂SeSO₃A method of lead contamination in solution is highly desirable.

Disclosure of Invention

The invention aims to provide Na₂SeSO₃A method for efficiently removing lead from solution.

The object of the present invention is achieved by that said Na₂SeSO₃The method for efficiently removing lead from the solution comprises the steps of pretreatment and main reaction, and specifically comprises the following steps:

A. measuring Na to be treated₂SeSO₃Heating the solution to 50-60 ℃ at a heating rate of 3-5 ℃/min to obtain a solution a;

B. main reaction: maintaining the temperature of the solution a at 50-60 ℃, adding a sulfide salt medicament, stirring and reacting at the temperature of 50-60 ℃ to obtain a solution b, and carrying out solid-liquid separation to obtain Na after lead removal of a target object₂SeSO₃And (3) solution.

The invention uses a specific sulfide salt medicament to efficiently treat lead impurities, and the specific impurity removal principle is as follows:

the specific chemical reaction principle is as follows:

Pb²⁺+S^2-=PbS↓

the method has the advantages of simple operation method, high lead impurity removal rate, good method stability and capability of efficiently treating Na₂SeSO₃Lead 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 lead from the solution comprises the steps of pretreatment and main reaction, and specifically comprises the following steps:

A. measuring Na to be treated₂SeSO₃Heating the solution to 50-60 ℃ at a heating rate of 3-5 ℃/min to obtain a solution a;

B. main reaction: maintaining the temperature of the solution a at 50-60 ℃, adding a sulfide salt medicament, stirring and reacting at the temperature of 50-60 ℃ to obtain a solution b, and carrying out solid-liquid separation to obtain Na after lead removal of a target object₂SeSO₃And (3) solution.

And the sulfide salt medicament in the step B is one or more of sodium sulfide, potassium sulfide, ferrous sulfide, copper sulfide, calcium sulfide, aluminum sulfide, cuprous sulfide and sodium persulfate.

The sulfide salt medicament is sodium sulfide.

In the step B, the addition amount of the sulfide salt medicament and Na to be treated₂SeSO₃The mass volume ratio of the solution is (0.5-2) g: (500-1000) ml.

And the stirring reaction time in the step B is 0.5-1 h.

And the solid-liquid separation in the step B is performed by adopting suction filtration.