CN111363924A - Method for treating copper-arsenic-containing filter cake - Google Patents
Method for treating copper-arsenic-containing filter cake Download PDFInfo
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- CN111363924A CN111363924A CN202010306654.2A CN202010306654A CN111363924A CN 111363924 A CN111363924 A CN 111363924A CN 202010306654 A CN202010306654 A CN 202010306654A CN 111363924 A CN111363924 A CN 111363924A
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- arsenic
- copper
- filter cake
- roasting
- sulfuric acid
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G28/00—Compounds of arsenic
- C01G28/005—Oxides; Hydroxides; Oxyacids
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting 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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
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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
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- 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)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for treating a filter cake containing copper and arsenic, which comprises the following steps: selecting a copper-arsenic filter cake, slurrying the copper-arsenic filter cake with concentrated sulfuric acid, carrying out oxidizing roasting on the slurried copper-arsenic filter cake, condensing and recovering smoke dust in the oxidizing roasting, volatilizing arsenic in the copper-arsenic filter cake into the smoke dust in the form of arsenic trioxide in the oxidizing roasting process, namely obtaining an arsenic trioxide product after condensing and recovering, and obtaining roasting slag after oxidizing roasting and sintering; carrying out sulfuric acid leaching treatment on the obtained roasting slag by using a sulfuric acid solution, wherein in the sulfuric acid leaching treatment process, copper in the roasting slag is immersed into the solution in a copper sulfate form, and leaching slag and the copper sulfate solution are obtained after the sulfuric acid leaching treatment is finished; namely the treatment of the copper arsenic filter cake is finished. The method is simple and convenient to operate and implement, can realize high-efficiency removal and comprehensive recycling of arsenic in the arsenic-containing copper filter cake, does not cause secondary pollution to the environment, and is favorable for popularization and application.
Description
Technical Field
The invention relates to the technical field of copper-arsenic-containing filter cake treatment, in particular to a method for treating a copper-arsenic-containing filter cake.
Background
The filter cake containing copper and arsenic is generated in the arsenic removing process of copper smelting, the content of arsenic sulfide in the filter cake containing arsenic and copper can reach 30-70%, and the content of copper is 3-5%. The filter cake containing copper and arsenic is mainly treated by a stockpiling method, arsenic in the filter cake containing copper and arsenic is unstable and is easy to dissolve out in acid and alkaline environments, and the method adopting the stockpiling method does not only occupy a large amount of fields, but also has the risk of environmental pollution, so that the method adopting the proper method to treat the arsenic filter cake has great significance in resource utilization of arsenic and copper in the arsenic filter cake. At present, the research on resource utilization of the copper-arsenic-containing filter cake mainly comprises the following steps: pyrogenic and wet processes. The pyrogenic process is to burn and volatilize arsenic sulfide in the filter cake containing copper and arsenic by adopting an oxidation combustion method, wherein arsenic is recovered in the form of arsenic trioxide, and copper is left in slag and can be used as a copper smelting raw material. The wet treatment method is to leach arsenic in the arsenic-containing filter cake by an oxidation leaching method, wherein the arsenic is finally made into arsenic trioxide, and the copper is recovered in the form of copper sulfate. The problems of the pyrogenic process are: the roasting temperature is higher (500 ℃ C.) and 800 ℃ C.), and the copper is not extracted. The wet treatment has problems that: the process flow is long, new pollutants (arsenic-containing waste water) are generated and need to be treated. In view of the above, the present invention provides a method for treating a copper arsenic-containing filter cake.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method for treating a filter cake containing copper and arsenic.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of treating a copper arsenic bearing filter cake comprising the steps of:
s1: selecting a copper-arsenic filter cake, fully slurrying the copper-arsenic filter cake with concentrated sulfuric acid for 0.5-1h, carrying out oxidizing roasting on the slurried copper-arsenic filter cake at the temperature of 300-400 ℃, wherein the roasting time lasts for 0.5-1h, condensing and recovering smoke dust in the oxidizing roasting, volatilizing arsenic in the copper-arsenic filter cake into the smoke dust in the form of arsenic trioxide in the oxidizing roasting process, namely obtaining an arsenic trioxide product after condensing and recovering, and obtaining roasting slag after oxidizing, roasting and sintering;
s2: carrying out sulfuric acid leaching treatment on the obtained roasting slag by adopting 50-100g/L sulfuric acid solution, wherein the leaching temperature is 90-100 ℃, the leaching time is 1-1.5h, and the liquid-solid ratio of the sulfuric acid solution to the roasting slag is 4:1, in the sulfuric acid leaching treatment process, copper in the roasting slag is immersed into the solution in a copper sulfate form, and leaching slag and the copper sulfate solution are obtained after the sulfuric acid leaching treatment is finished; namely the treatment of the copper arsenic filter cake is finished.
Preferably, in step S1, the content of the elements in the copper arsenic filter cake is: 40-50% of arsenic, 20-30% of sulfur, 3-5% of copper and other elements, wherein the other elements mainly comprise silicon and calcium.
Preferably, in step S1, the purity of the arsenic trioxide product is 98.5-99.5%, and the content of arsenic in the roasting slag is 0.5-1%, that is, in step S1, the volatilization rate of arsenic in the copper-arsenic filter cake is 99-99.5%, thereby realizing efficient recycling of arsenic in the copper-arsenic filter cake.
Preferably, in step S2, the leaching rate of copper in the roasting slag is 98-99%, so as to realize efficient recycling of copper in the copper arsenic filter cake; the copper sulfate solution is further filtered to remove impurities, and the copper sulfate solution can be applied to electrolytic copper.
The method for treating the filter cake containing copper and arsenic, provided by the invention, has the beneficial effects that: the scheme realizes the efficient removal of arsenic in the arsenic-containing copper filter cake at low temperature in the application process, further realizes the comprehensive recycling of arsenic and copper in the copper-containing arsenic filter cake, does not cause secondary pollution to the environment, and is favorable for popularization and application.
Drawings
FIG. 1 is a schematic flow diagram of a method for treating a copper-arsenic-containing filter cake according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a method of treating a copper arsenic bearing filter cake includes the steps of:
s1: selecting a copper-arsenic filter cake, fully slurrying the copper-arsenic filter cake with concentrated sulfuric acid for 0.5-1h, carrying out oxidizing roasting on the slurried copper-arsenic filter cake at the temperature of 300-400 ℃, wherein the roasting time lasts for 0.5-1h, condensing and recovering smoke dust in the oxidizing roasting, volatilizing arsenic in the copper-arsenic filter cake into the smoke dust in the form of arsenic trioxide in the oxidizing roasting process, namely obtaining an arsenic trioxide product after condensing and recovering, and obtaining roasting slag after oxidizing, roasting and sintering;
s2: carrying out sulfuric acid leaching treatment on the obtained roasting slag by adopting 50-100g/L sulfuric acid solution, wherein the leaching temperature is 90-100 ℃, the leaching time is 1-1.5h, and the liquid-solid ratio of the sulfuric acid solution to the roasting slag is 4:1, in the sulfuric acid leaching treatment process, copper in the roasting slag is immersed into the solution in a copper sulfate form, and leaching slag and the copper sulfate solution are obtained after the sulfuric acid leaching treatment is finished; namely the treatment of the copper arsenic filter cake is finished.
In step S1, the content of elements in the copper arsenic filter cake is: 40-50% of arsenic, 20-30% of sulfur, 3-5% of copper and other elements, wherein the other elements mainly comprise silicon and calcium.
In step S1, the purity of the arsenic trioxide product is 98.5-99.5%, and the content of arsenic in the roasting slag is 0.5-1%, that is, in step S1, the volatilization rate of arsenic in the copper-arsenic filter cake is 99-99.5%, thereby realizing efficient recycling of arsenic in the copper-arsenic filter cake.
In step S2, the leaching rate of copper in the roasting slag is 98-99%, so that the copper in the copper arsenic filter cake is efficiently recycled; the copper sulfate solution is further filtered to remove impurities, and the copper sulfate solution can be applied to electrolytic copper.
In conclusion, the method is simple and convenient to operate and implement in the application process, can realize the efficient removal of arsenic in the arsenic-containing copper filter cake at low temperature, further realizes the comprehensive recycling of arsenic and copper in the arsenic-containing filter cake, does not cause secondary pollution to the environment, and is favorable for popularization and application.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A method of treating a copper arsenic bearing filter cake comprising the steps of:
s1: selecting a copper-arsenic filter cake, fully slurrying the copper-arsenic filter cake with concentrated sulfuric acid for 0.5-1h, carrying out oxidizing roasting on the slurried copper-arsenic filter cake at the temperature of 300-400 ℃, wherein the roasting time lasts for 0.5-1h, condensing and recovering smoke dust in the oxidizing roasting, volatilizing arsenic in the copper-arsenic filter cake into the smoke dust in the form of arsenic trioxide in the oxidizing roasting process, namely obtaining an arsenic trioxide product after condensing and recovering, and obtaining roasting slag after oxidizing, roasting and sintering;
s2: carrying out sulfuric acid leaching treatment on the obtained roasting slag by adopting 50-100g/L sulfuric acid solution, wherein the leaching temperature is 90-100 ℃, the leaching time is 1-1.5h, and the liquid-solid ratio of the sulfuric acid solution to the roasting slag is 4:1, in the sulfuric acid leaching treatment process, copper in the roasting slag is immersed into the solution in a copper sulfate form, and leaching slag and the copper sulfate solution are obtained after the sulfuric acid leaching treatment is finished; namely the treatment of the copper arsenic filter cake is finished.
2. The method of claim 1, wherein in step S1, the copper arsenic filter cake contains the following elements: 40-50% of arsenic, 20-30% of sulfur, 3-5% of copper and other elements, wherein the other elements mainly comprise silicon and calcium.
3. The method of claim 1, wherein the purity of the arsenic trioxide product in step S1 is 98.5-99.5%, and the content of arsenic in the roasting slag is 0.5-1%, that is, the volatilization rate of arsenic in the copper-arsenic filter cake is 99-99.5% in step S1, thereby achieving efficient recycling of arsenic in the copper-arsenic filter cake.
4. The method for treating the cake containing copper and arsenic according to claim 1, wherein in step S2, the leaching rate of copper in the roasting slag is 98-99%, thereby realizing efficient recycling of copper in the cake containing copper and arsenic; the copper sulfate solution is further filtered to remove impurities, and the copper sulfate solution can be applied to electrolytic copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306654.2A CN111363924A (en) | 2020-04-17 | 2020-04-17 | Method for treating copper-arsenic-containing filter cake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010306654.2A CN111363924A (en) | 2020-04-17 | 2020-04-17 | Method for treating copper-arsenic-containing filter cake |
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| CN111363924A true CN111363924A (en) | 2020-07-03 |
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| CN202010306654.2A Pending CN111363924A (en) | 2020-04-17 | 2020-04-17 | Method for treating copper-arsenic-containing filter cake |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015879A (en) * | 2021-09-28 | 2022-02-08 | 中南大学 | Method for recovering copper by pyrogenic process of arsenic matte |
| CN116099852A (en) * | 2022-12-21 | 2023-05-12 | 福建省矿投环保科技有限公司 | Harmless treatment and arsenic oxide recovery method for hazardous waste residues containing arsenic oxide and sulfur |
Citations (5)
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| CN108504872A (en) * | 2018-04-16 | 2018-09-07 | 北京科技大学 | A kind of method of integrated treatment white cigarette dirt and arsenic sulfide slag |
| CN108624759A (en) * | 2018-04-16 | 2018-10-09 | 北京科技大学 | A method of the comprehensively recovering valuable metal from white cigarette dirt |
| CN109881007A (en) * | 2019-02-25 | 2019-06-14 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | A method of the comprehensive utilization of acid water containing arsenic |
| CN110093510A (en) * | 2019-05-08 | 2019-08-06 | 铜仁学院 | A method of the comprehensively recovering valuable metal of flue dust containing arsenical copper |
| CN110669941A (en) * | 2019-09-19 | 2020-01-10 | 云南锡业研究院有限公司 | Method for selectively removing arsenic and recovering valuable metal from white smoke |
-
2020
- 2020-04-17 CN CN202010306654.2A patent/CN111363924A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504872A (en) * | 2018-04-16 | 2018-09-07 | 北京科技大学 | A kind of method of integrated treatment white cigarette dirt and arsenic sulfide slag |
| CN108624759A (en) * | 2018-04-16 | 2018-10-09 | 北京科技大学 | A method of the comprehensively recovering valuable metal from white cigarette dirt |
| CN109881007A (en) * | 2019-02-25 | 2019-06-14 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | A method of the comprehensive utilization of acid water containing arsenic |
| CN110093510A (en) * | 2019-05-08 | 2019-08-06 | 铜仁学院 | A method of the comprehensively recovering valuable metal of flue dust containing arsenical copper |
| CN110669941A (en) * | 2019-09-19 | 2020-01-10 | 云南锡业研究院有限公司 | Method for selectively removing arsenic and recovering valuable metal from white smoke |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015879A (en) * | 2021-09-28 | 2022-02-08 | 中南大学 | Method for recovering copper by pyrogenic process of arsenic matte |
| CN116099852A (en) * | 2022-12-21 | 2023-05-12 | 福建省矿投环保科技有限公司 | Harmless treatment and arsenic oxide recovery method for hazardous waste residues containing arsenic oxide and sulfur |
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