CN111705218A - Mercury remover and application thereof - Google Patents
Mercury remover and application thereof Download PDFInfo
- Publication number
- CN111705218A CN111705218A CN202010646081.8A CN202010646081A CN111705218A CN 111705218 A CN111705218 A CN 111705218A CN 202010646081 A CN202010646081 A CN 202010646081A CN 111705218 A CN111705218 A CN 111705218A
- Authority
- CN
- China
- Prior art keywords
- mercury
- removing agent
- mercury removing
- acid
- application
- 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.)
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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
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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
- 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
- C22B43/00—Obtaining mercury
-
- 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
-
- 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
Abstract
The invention discloses a mercury removing agent and application thereof, wherein the mercury removing agent consists of 65-85% of oxidant and 15-35% of chlorine-containing compound. The application is the application of the demercuration agent in the demercuration process of the copper smelting acid sludge. The demercuration agent has the advantages of simple and easily-obtained raw materials, small gas generation amount in the copper smelting acid mud demercuration process, water absorption, no potential safety hazard, realization of mercury removal, and low mercury content in the final product lead sulfate below 0.004%.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a mercury removing agent and application thereof.
Background
In the process of preparing acid from non-ferrous metal copper smelting flue gas, during flue gas purification, heavy metals volatilized from raw materials are washed and settled through dynamic wave washing to form acid mud, the acid mud mainly comprises lead, selenium, mercury and other components, the content of selenium can reach 2-10% and the content of mercury can reach 0.5-5% due to different raw material sources, and in addition, a small amount of heavy metals and valuable metal elements such as gold, silver, zinc, cadmium, copper, arsenic and the like are added, so that the acid mud has high recovery value. The copper smelting acid sludge is a dangerous waste with high added value, and has great harm to the environment and human health if not reasonably treated and disposed.
At present, relatively few researches on treatment and disposal of mercury-containing acid sludge are carried out, and the existing acid sludge treatment method is a sulfation roasting method: the acid sludge is dried and then roasted, mercury in the roasting flue gas is recovered by a condensation method, and selenium is recovered by sedimentation after oxidation and volatilization, but the method has the problems of equipment corrosion, complex process flow and the like. By adopting the method of directly leaching the selenium in the acid mud, the mercury element in the acid mud can generate adverse effect on the recovery and purification of the selenium. Patent 201610252644.9 proposes a wet method for treating acid sludge, which has simple components and does not relate to the most important problem of selenium and mercury separation in acid sludge; patent 201710211864.1 proposes a treatment process of acid sludge, which only involves the separation of selenium and mercury, but is easy to generate toxic and harmful gases in the reaction process, has potential safety hazard and needs to add a tail gas recovery device; patent 201711327545.3 proposes a method for separating mercury, selenium and lead from nonferrous smelting acid sludge, which comprises leaching lead and mercury by oxygen pressure to obtain lead-mercury alloy, wherein the oxygen pressure leaching equipment and process are more complicated than normal pressure leaching and have high cost; patent 202010254062.0 proposes a wet treatment method for acid sludge with limited mercury removal. The method for recovering valuable metals in the rest acid mud has complex process flow and higher cost. Therefore, it is necessary to develop a mercury remover product that can solve the above process problems.
Disclosure of Invention
The first purpose of the invention is to provide a mercury removing agent; the second purpose is to provide the application of the mercury removing agent.
The first purpose of the invention is realized by that the mercury removing agent consists of 65-85% of oxidant and 15-35% of chlorine-containing compound.
The second purpose of the invention is realized by the application of the mercury removing agent in the copper smelting acid sludge mercury removing process.
The demercuration agent has the advantages of simple and easily-obtained raw materials, small gas generation amount in the copper smelting acid mud demercuration process, water absorption, no potential safety hazard, realization of mercury removal, and low mercury content in the final product lead sulfate below 0.004%.
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.
The mercury removing agent consists of 65-85% of oxidant and 15-35% of chlorine-containing compound.
The oxidant is one or more of nitric acid, sodium nitrate and potassium nitrate.
The chlorine-containing compound is one or more of hydrochloric acid, sodium chloride and potassium chloride.
The application of the mercury removing agent is the application of the mercury removing agent in a copper smelting acid sludge mercury removing process.
The copper smelting acid sludge demercuration process comprises the steps of main reaction and post-treatment, and specifically comprises the following steps:
A. main reaction: mixing copper smelting acid mud to be treated with a mercury removing agent, stirring for reaction, and then carrying out liquid-solid separation to obtain a mercury-rich leaching solution a and leaching residues b;
B. and (3) post-treatment:
1) the leaching solution a can return to the main reaction process and is used for leaching the copper smelting acid mud again;
2) and washing the leaching residue b to obtain the high-purity lead-containing compound.
In the step A, the liquid-solid ratio of the copper smelting acid mud to the mercury removing agent is (1-4): 1.
the reaction temperature in the step A is 50-80 ℃.
The reaction time in the step A is 15-60 min.
And the washing in the step B is water washing or acid washing.
The acid washing is carried out by adopting nitric acid or hydrochloric acid, and the pH value of the solution is not higher than 3 during washing.
The invention is further illustrated by the following specific examples:
example 1
Weighing 65% of nitric acid and 35% of hydrochloric acid in percentage by weight, and uniformly mixing to obtain the target mercury removing agent.
Example 2
Weighing 80% of nitric acid and 20% of sodium chloride in percentage by weight, and uniformly mixing to obtain the target mercury removing agent.
Example 3
Weighing 85% of sodium nitrate and 15% of hydrochloric acid in percentage by weight, and uniformly mixing to obtain the target mercury removing agent.
Example 4
Weighing 70 percent of potassium nitrate and 30 percent of potassium chloride by weight percent, and uniformly mixing to obtain the target mercury removing agent.
Example 5
Weighing 80% of nitric acid and 20% of potassium chloride in percentage by weight, and uniformly mixing to obtain the target mercury removing agent.
Example 6
Weighing 75% of sodium nitrate and 25% of hydrochloric acid in percentage by weight, and uniformly mixing to obtain the target mercury removing agent.
Example 7
200ml of the mercury removing agent in the embodiment 2 is added into 100g of copper smelting acid mud with the water content of 22 percent and the mercury content of 1.0 percent for reaction, the leaching temperature is 70 ℃, and the leaching time is 60 min. And after the reaction is finished, carrying out liquid-solid separation to obtain a mercury-rich leaching solution and leaching residues. And (3) taking 200ml of recovered leachate, and reacting with 100g of copper smelting acid mud, wherein the leaching temperature is 70 ℃, and the leaching time is 60 min. Through chemical detection, the mercury content in the two lead-containing compounds is lower than 0.0035%, and the lead sulfate content is higher than 98.5%.
Example 8
100ml of the mercury removing agent in the embodiment 1 is added into 100g of copper smelting acid mud with 20 percent of water and 0.24 percent of mercury content for reaction, the leaching temperature is 75 ℃, and the leaching time is 30 min. And after the reaction is finished, carrying out liquid-solid separation to obtain a mercury-rich leaching solution and leaching residues, and washing the leaching residues with water to obtain the high-purity lead-containing compound. Chemical detection shows that the lead-containing compound contains 0.0009% of mercury and more than 99% of lead sulfate.
Example 9
The mercury removing agents prepared in the embodiments 3, 4, 5 and 6 are reacted respectively, and the method is the same as the embodiments 7 and 8, and the results all show that the mercury removing agent can remove mercury, the mercury content in the final product lead sulfate is below 0.004%, and the lead sulfate content is higher than 98.5%.
Claims (10)
1. The mercury removing agent is characterized by comprising 65-85% of an oxidant and 15-35% of a chlorine-containing compound.
2. The mercury removing agent as claimed in claim 1, wherein the oxidant is one or more of nitric acid, sodium nitrate and potassium nitrate.
3. The demercuration agent according to claim 1, wherein the chlorine-containing compound is one or more of hydrochloric acid, sodium chloride and potassium chloride.
4. The application of the mercury removing agent as claimed in any one of claims 1 to 3, wherein the mercury removing agent is applied to a copper smelting acid sludge mercury removing process.
5. The application of the mercury removing agent according to claim 4, wherein the copper smelting acid sludge mercury removing process comprises main reaction and post-treatment steps, and specifically comprises the following steps:
A. main reaction: mixing copper smelting acid mud to be treated with a mercury removing agent, stirring for reaction, and then carrying out liquid-solid separation to obtain a mercury-rich leaching solution a and leaching residues b;
B. and (3) post-treatment:
1) the leaching solution a can return to the main reaction process and is used for leaching the copper smelting acid mud again;
2) and washing the leaching residue b to obtain the high-purity lead-containing compound.
6. The application of the mercury removing agent according to claim 5, wherein the liquid-solid ratio of the mercury removing agent to the copper smelting acid mud in the step A is (1-4): 1.
7. the application of the mercury removing agent as claimed in claim 5, wherein the reaction temperature in the step A is 50-80 ℃.
8. The application of the mercury removing agent as claimed in claim 5, wherein the reaction time in the step A is 15-60 min.
9. The use of the mercury removing agent as claimed in claim 5, wherein the washing in step B is water washing or acid washing.
10. Use of a demercuration agent as claimed in claim 9, wherein the acid washing is performed by nitric acid or hydrochloric acid, and the pH value of the solution is not higher than 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646081.8A CN111705218A (en) | 2020-07-07 | 2020-07-07 | Mercury remover and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646081.8A CN111705218A (en) | 2020-07-07 | 2020-07-07 | Mercury remover and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111705218A true CN111705218A (en) | 2020-09-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010646081.8A Pending CN111705218A (en) | 2020-07-07 | 2020-07-07 | Mercury remover and application thereof |
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| CN (1) | CN111705218A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124459A (en) * | 1977-07-21 | 1978-11-07 | Stauffer Chemical Company | Process for removing mercury from brine sludges |
| MX4402E (en) * | 1976-04-28 | 1982-04-26 | Eduardo Diaz Nogueira | IMPROVED PROCEDURE FOR THE DISPOSAL OF MERCURY FROM WASTEWATER BY EXTRACTION WITH SOLVENTS |
| CN102101007A (en) * | 2011-01-27 | 2011-06-22 | 华电环保系统工程有限公司 | Method for removing mercury from smoke in coal fired power plant and mercury removing agent used by same |
| CN103468956A (en) * | 2013-09-11 | 2013-12-25 | 河南中原黄金冶炼厂有限责任公司 | Method for recycling multiple elements in acid mud generated in acid making through gold smelting |
| CN108004408A (en) * | 2017-12-13 | 2018-05-08 | 江西理工大学 | Separating hydrargyrum, selenium, the method for lead in a kind of acid mud from nonferrous smelting |
| CN108220606A (en) * | 2018-02-07 | 2018-06-29 | 云南省固体废物管理中心 | A kind of method of lead, mercury, selenium synthetical recovery in Copper making acid mud |
-
2020
- 2020-07-07 CN CN202010646081.8A patent/CN111705218A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX4402E (en) * | 1976-04-28 | 1982-04-26 | Eduardo Diaz Nogueira | IMPROVED PROCEDURE FOR THE DISPOSAL OF MERCURY FROM WASTEWATER BY EXTRACTION WITH SOLVENTS |
| US4124459A (en) * | 1977-07-21 | 1978-11-07 | Stauffer Chemical Company | Process for removing mercury from brine sludges |
| CN102101007A (en) * | 2011-01-27 | 2011-06-22 | 华电环保系统工程有限公司 | Method for removing mercury from smoke in coal fired power plant and mercury removing agent used by same |
| CN103468956A (en) * | 2013-09-11 | 2013-12-25 | 河南中原黄金冶炼厂有限责任公司 | Method for recycling multiple elements in acid mud generated in acid making through gold smelting |
| CN108004408A (en) * | 2017-12-13 | 2018-05-08 | 江西理工大学 | Separating hydrargyrum, selenium, the method for lead in a kind of acid mud from nonferrous smelting |
| CN108220606A (en) * | 2018-02-07 | 2018-06-29 | 云南省固体废物管理中心 | A kind of method of lead, mercury, selenium synthetical recovery in Copper making acid mud |
Non-Patent Citations (1)
| Title |
|---|
| 童志权等: "《工业废气污染控制与利用》", 31 January 1989, 科学工业出版社 * |
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Application publication date: 20200925 |