CN117625971A - Gold dust recycling method - Google Patents
Gold dust recycling method Download PDFInfo
- Publication number
- CN117625971A CN117625971A CN202311596116.1A CN202311596116A CN117625971A CN 117625971 A CN117625971 A CN 117625971A CN 202311596116 A CN202311596116 A CN 202311596116A CN 117625971 A CN117625971 A CN 117625971A
- Authority
- CN
- China
- Prior art keywords
- gold
- powder
- filter cotton
- recycling method
- gold powder
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- 241000430525 Aurinia saxatilis Species 0.000 title claims abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010931 gold Substances 0.000 claims abstract description 36
- 229910052737 gold Inorganic materials 0.000 claims abstract description 36
- 229920000742 Cotton Polymers 0.000 claims abstract description 33
- GUWKQWHKSFBVAC-UHFFFAOYSA-N [C].[Au] Chemical compound [C].[Au] GUWKQWHKSFBVAC-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 241000287127 Passeridae Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000013094 purity test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- C22B7/02—Working-up flue dust
-
- 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
- C22B1/005—Preliminary treatment of scrap
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- 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
- C22B7/001—Dry processes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention belongs to the technical field of gold dust recovery, and particularly relates to a recovery and reuse method of gold dust. The invention provides a gold dust recycling method, which comprises the following steps: dry recycling gas generated in the gold welding process to the sealed box body; sintering the filter cotton containing gold in the sealed box body to obtain carbon gold powder; and mixing the carbon gold powder with a reducing agent, and reducing to obtain gold. The method provided by the invention can recycle the gold powder wasted in the welding process, and the purity can reach 99.95%.
Description
Technical Field
The invention belongs to the technical field of hard gold, and particularly relates to a gold dust recycling method.
Background
Gold is an elemental form of the chemical element gold, atomic number 79. Pure gold is bright and glossy, yellow and reddish, soft, high in density and ductile, is one of rare, precious and very important metals, is not only a special commodity for storage and investment, but also an important material for departments of jewelry industry, electronic industry, modern communication, aerospace industry and the like, and jewelry is widely used for processing precious metals, precious stones and the like into sparrow beaches, earrings, necklaces, rings, bracelets and the like. With the improvement of the living standard of people, gold jewelry is becoming more popular. Gold powder is generated in the processing process of gold jewelry, and the collection of gold powder is very important because gold is very noble.
Disclosure of Invention
In view of the above, the invention provides a recycling method of gold powder, which can recycle the gold powder wasted in the welding process and has purity up to 99.95%.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a gold dust recycling method, which comprises the following steps:
the gold powder generated in the gold processing process is recovered to a box body containing filter cotton in a dry mode, and the filter cotton adsorbs the gold powder in the gas;
sintering the filter cotton containing gold in the box body to obtain carbon gold powder;
and mixing the carbon gold powder with a reducing agent, and reducing to obtain gold.
Preferably, the pore diameter of the filter cotton is 1-3 μm.
Preferably, the sintering temperature is 600-900 ℃ and the sintering time is 1-2 h.
Preferably, the temperature rising rate of the sintering temperature is 10-15 ℃/min.
Preferably, the reducing agent is zinc powder.
Preferably, the mass ratio of the carbon gold powder to the reducing agent is 1:3 to 4.
Preferably, the temperature of the reduction is 40-70 ℃ and the time is 0.5-2 h.
The invention provides a gold dust recycling method, which comprises the following steps: the gold powder generated in the gold processing process is recovered to a box body containing filter cotton in a dry mode, and the filter cotton adsorbs the gold powder in the gas; sintering the filter cotton containing gold in the box body to obtain carbon gold powder; and mixing the carbon gold powder with a reducing agent, and reducing to obtain gold. The method provided by the invention can recycle the gold powder wasted in the welding process, and the purity can reach 99.95%.
Detailed Description
The invention provides a gold dust recycling method, which comprises the following steps:
the gold powder generated in the gold processing process is recovered to a box body containing filter cotton in a dry mode, and the filter cotton adsorbs the gold powder in the gas;
sintering the filter cotton containing gold in the box body to obtain carbon gold powder;
and mixing the carbon gold powder with a reducing agent, and reducing to obtain gold.
According to the invention, gold powder generated in the gold processing process is recovered to the box body containing the filter cotton in a dry mode, and the filter cotton adsorbs the gold powder in the gas.
The dry recovery step is preferably to blow gold powder generated in the gold processing process into a box body containing filter cotton through a pipeline by a fan, and the filter cotton adsorbs the gold powder in the gas.
In the present invention, the pore diameter of the filter cotton in the sealed case is preferably 1 to 3. Mu.m, more preferably 1. Mu.m.
The invention sinters the filter cotton containing gold in the box body to obtain carbon gold powder.
In the present invention, the sintering temperature is preferably 600 to 800 ℃, more preferably 700 ℃; the time is preferably 1 to 2 hours, more preferably 1.5 hours. In the present invention, the temperature rising rate of the temperature rising to the sintering temperature is preferably 10 to 15℃per minute, more preferably 12℃per minute.
In the present invention, the content amount in the carbon gold powder is preferably 95wt%, more preferably 98wt%.
After the carbon gold powder is obtained, the carbon gold powder and the reducing agent are mixed and reduced to obtain gold.
In the present invention, the reducing agent is preferably zinc powder; the particle diameter of the zinc powder is preferably 0.1 to 0.8mm, more preferably 0.3mm.
In the invention, the mass ratio of the carbon gold powder to the reducing agent is preferably 1:3 to 4, more preferably 1:3.5.
in the present invention, the temperature of the reduction is preferably 40 to 70 ℃, more preferably 50 ℃; the time is preferably 1 to 2 hours, more preferably 1.5 hours. In the present invention, the temperature increase rate of the temperature to be increased to the reduction temperature is preferably 3 to 6℃per minute, more preferably 5℃per minute.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Blowing gold powder generated in the gold processing process into a box body containing filter cotton through a pipeline by a fan, wherein the filter cotton adsorbs the gold powder in the gas, and the aperture of the filter cotton is 3 mu m;
sintering the filter cotton containing gold in the sealed box body (the temperature is 600 ℃, the time is 2 hours, and the heating rate is 10 ℃/min) to obtain carbon gold powder;
100g of carbon gold powder and 300g of zinc powder are mixed and reduced (the temperature is 40 ℃ C., the time is 2h, and the heating rate is 5 ℃/min) to obtain gold.
Example 2
Blowing gold powder generated in the gold processing process into a box body containing filter cotton through a pipeline by a fan, wherein the filter cotton adsorbs the gold powder in the gas, and the aperture of the filter cotton is 2 mu m;
sintering the filter cotton containing gold in the sealed box body (the temperature is 700 ℃ C., the time is 1.5h, and the heating rate is 15 ℃/min) to obtain carbon gold powder;
and mixing 100g of carbon gold powder with 400g of zinc powder, and reducing (the temperature is 60 ℃, the time is 2h, and the heating rate is 5 ℃/min) to obtain gold.
Example 3
Blowing gold powder generated in the gold processing process into a box body containing filter cotton through a pipeline by a fan, wherein the filter cotton adsorbs the gold powder in the gas, and the aperture of the filter cotton is 1 mu m;
sintering the filter cotton containing gold in the sealed box body (the temperature is 800 ℃, the time is 1h, and the heating rate is 12 ℃/min) to obtain carbon gold powder;
and mixing 100g of carbon gold powder with 350g of zinc powder, and reducing (the temperature is 50 ℃, the time is 1.5h, and the heating rate is 5 ℃/min) to obtain gold.
The purity of the gold prepared in example 1 was also tested by the invention using a spark direct-reading spectrometer, and the test results are shown in table 1.
TABLE 1 results of purity test
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. The gold dust recycling method is characterized by comprising the following steps of:
the gold powder generated in the gold processing process is recovered to a box body containing filter cotton in a dry mode, and the filter cotton adsorbs the gold powder in the gas;
sintering the filter cotton containing gold in the box body to obtain carbon gold powder;
and mixing the carbon gold powder with a reducing agent, and reducing to obtain gold.
2. The recycling method according to claim 1, wherein the pore diameter of the filter cotton is 1 to 3 μm.
3. The recycling method according to claim 1, wherein the sintering temperature is 600 to 900 ℃ and the time is 1 to 2 hours.
4. The recycling method according to claim 4, wherein a rate of temperature rise to the sintering temperature is 10 to 15 ℃/min.
5. The recycling method of claim 1, wherein the reducing agent is zinc powder.
6. The recycling method according to claim 1 or 5, wherein the mass ratio of the carbon gold powder to the reducing agent is 1:3 to 4.
7. The recycling method according to claim 1 or 5, wherein the temperature of the reduction is 40 to 70 ℃ for 0.5 to 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311596116.1A CN117625971A (en) | 2023-11-28 | 2023-11-28 | Gold dust recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311596116.1A CN117625971A (en) | 2023-11-28 | 2023-11-28 | Gold dust recycling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117625971A true CN117625971A (en) | 2024-03-01 |
Family
ID=90035104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311596116.1A Pending CN117625971A (en) | 2023-11-28 | 2023-11-28 | Gold dust recycling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117625971A (en) |
-
2023
- 2023-11-28 CN CN202311596116.1A patent/CN117625971A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3100804B1 (en) | Manufacturing method for nickel powder | |
| NO20060628L (en) | Process for making fine metal, alloy and composite powders | |
| EP3345701A1 (en) | Process for producing nickel powder | |
| US2636892A (en) | Production of metal oxalates | |
| CN113528810A (en) | Method for treating mixture of laterite nickel ore leaching slag and jarosite slag and application | |
| CN109702217A (en) | A kind of iron cobalt-copper alloy powder and preparation method thereof | |
| EP3276014B1 (en) | Cobalt powder production method | |
| CN117625971A (en) | Gold dust recycling method | |
| JP4174689B2 (en) | Pre-alloyed copper-containing powder and its use in the production of diamond tools | |
| CN109794598A (en) | A kind of preparation method of ultra-pure rhenium ingot | |
| US3850614A (en) | Production of tungsten and carbide powder | |
| CN108637264B (en) | Ball mill, method for improving flowability of metal powder for 3D printing and metal powder for 3D printing | |
| CN109295374A (en) | A kind of nickel is for cobalt hard alloy material and its preparation method and application | |
| CN102699337A (en) | Method for synthesizing and preparing hard alloy powder by mixing original powder and regenerated powder | |
| JP2007270228A (en) | Method for recovering rhodium | |
| AU695628B2 (en) | Cobalt metal agglomerates, process for their production and their use | |
| AU700716B2 (en) | Cobalt metal agglomerates, process for the production thereof and the use thereof | |
| GB2625232A (en) | Method for recovering carbide from waste TI(C,N)-based metal ceramic | |
| US11731102B1 (en) | Purification material for rare earth metal or rare earth alloy and preparation method thereof and purification method for rare earth metal or rare earth alloy | |
| CA1115066A (en) | Process for the production of extra fine cobalt powder | |
| US20120251380A1 (en) | Recycling of tungsten carbides | |
| CN112626301A (en) | Preparation process of nickel-iron alloy | |
| CN110029200A (en) | The iron powder preparation method of acid non-soluble substance content in a kind of reduction iron material | |
| CN112279297B (en) | Method for selectively separating tin from electronic waste and synchronously preparing nano tin dioxide | |
| US4606885A (en) | High purity cobalt article |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |