CN102605389A - Low consumption efficient method for washing and drying of electrolytic silver powder - Google Patents
Low consumption efficient method for washing and drying of electrolytic silver powder Download PDFInfo
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- CN102605389A CN102605389A CN2012100659861A CN201210065986A CN102605389A CN 102605389 A CN102605389 A CN 102605389A CN 2012100659861 A CN2012100659861 A CN 2012100659861A CN 201210065986 A CN201210065986 A CN 201210065986A CN 102605389 A CN102605389 A CN 102605389A
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- silver powder
- washing
- electrolytic
- drying
- centrifuging
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract 23
- 238000005406 washing Methods 0.000 title claims abstract 15
- 238000001035 drying Methods 0.000 title claims abstract 10
- 238000000034 method Methods 0.000 title claims abstract 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract 6
- 238000007603 infrared drying Methods 0.000 claims abstract 4
- 238000005868 electrolysis reaction Methods 0.000 claims abstract 3
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 4
- 239000008151 electrolyte solution Substances 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 claims 3
- 238000005660 chlorination reaction Methods 0.000 claims 2
- 230000018044 dehydration Effects 0.000 claims 2
- 238000006297 dehydration reaction Methods 0.000 claims 2
- 230000003252 repetitive effect Effects 0.000 claims 2
- 238000005201 scrubbing Methods 0.000 claims 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
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- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
A low consumption efficient method for washing and drying of electrolytic silver powder includes: feeding electrolytic silver powder containing silver nitrate electrolyte into centrifugal filtration and washing equipment after electrolysis; and repeatedly washing and dehydrating the silver powder subjected to centrifugal filtering to obtain separated silver powder, feeding the silver powder into infrared drying equipment for thermal drying, and obtaining dried electrolytic silver powder. The method is low in energy consumption, high in production efficiency, low in production cost, low in silver loss and environment-friendly.
Description
Technical field
The invention belongs to the precious metal smelting technical field, relate in particular to a kind of low-consumption high-efficiency ground electrolytic silver powder is washed and the exsiccant method.
Background technology
In the precious metal smelting silver preparing electrolysis process, contain impurity such as copper, antimony, bismuth, lead, tellurium in the silver electrolyte, in electrolytic process; There is partial impurities on negative plate, to separate out with silver; In addition, silver powder can be taken the part silver electrolyte out of in going out the groove process, for guaranteeing the quality product of silver ingot; In process of production, must wash electrolytic silver powder.At present, at home in the precious metal smelting industry, the washing of silver powder mainly is to lean on hand washing, and promptly silver powder goes out groove and is placed in the rinse bath; Add zero(ppm) water in the rinse bath then, soak laggard pedestrian worker and stir, washing; Feed the heavy silver of adding sodium-chlor in the chlorination tank to wash water again, repeat above process and be neutral until the silver powder wash water, chlorination deposition supernatant enters Sewage treatment systems; Silver nitride precipitation is allocated a certain proportion of soda ash into and is returned pyrogenic process system recoveries silver, and at present, Silver monochloride pyrogenic attack technology silver raising recovery rate is lower; About 95%, produce bigger flue dust, cause bigger pressure to dust collecting system.The silver powder that washing is good is packed into and is delivered in the baking oven in the Stainless Steel Disc dryly, because that silver powder contains moisture is higher, drying time is generally at 3-4 hour, and the silver powder after the oven dry takes out casts silver ingot.Above process is to lean on artificial the completion basically, and labour intensity is big, and in addition, the washing methods efficient that more than adopts is lower, needs the zero(ppm) water of labor in the silver powder washing process, gets in the purification system thereby produce a large amount of wash waters, and production cost is increased.Above-mentioned traditional production process exists that labor strength is big, production efficiency is low, production cost is high, argent loses high shortcoming, the needs of incompatibility modern production.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art and provide that a kind of energy consumption is low, production efficiency is high, production cost is low, low, the eco-friendly silver powder washing of argent rate of loss and drying means.
The object of the invention is realized through following technical scheme:
A kind of electrolytic silver powder low-consumption high-efficiency washing and drying means; This method is the electrolytic silver powder that contains Silver Nitrate electrolytic solution after the electrolysis to be sent into carry out centrifuging in centrifuging and the washing plant; Silver powder after the centrifuging is carried out repetitive scrubbing again send into heating, drying in the infrared drying plant, obtain the exsiccant electrolytic silver powder with the isolated silver powder in dehydration back.
The electrolytic silver powder that the present invention contains Silver Nitrate electrolytic solution after with electrolysis carries out centrifuging, isolated nitric acid electrolytic solution after the centrifuging is returned electrolytic system handle the back cyclically utilizing.
The present invention also can continue isolated silver powder after the centrifuging to be retained in centrifuging and the washing plant, filters and washing plant feeds zero(ppm) water continuously to centrifuge washing, and silver powder is carried out repetitive scrubbing and dehydration again, washs to wash water pH value to equal 7; The mass ratio of control silver powder and zero(ppm) water is 1:0.8～1 during washing; In the centrifuge washing process washing water that filter out are drained into and carry out chlorination deposition in the chlorination tank, accomplish laundry operation after, with silver powder discharge port taking-up from centrifuging and washing plant, send into heating, drying in the infrared drying plant, obtain the exsiccant electrolytic silver powder.
Infrared drying plant according to the invention selects for use the infrared light of short-wave infrared fluorescent tube directly silver powder to be carried out heating, drying, and short-wave infrared fluorescent tube wavelength is 0.76～1.6 μ m.
The invention has the advantages that, adopt centrifuging and washing plant that electrolytic silver powder is carried out centrifuging and washing, can significantly reduce the leaching requirement of electrolytic silver powder, thereby reduce water loss and wastewater treatment capacity, reduced energy consumption and production cost.Adopt centrifuging, also can reduce the water cut of isolated silver powder greatly, reduce follow-up exsiccant energy consumption and time.Adopt heating, drying in the infrared drying plant, drying efficiency is high and effective.Elder generation was through carrying out centrifuging and washing in centrifuging and the washing plant after electrolytic silver powder went out groove; Filtrating is that Silver Nitrate electrolytic solution returns in the electrolytic system, can significantly reduce the Silver monochloride that the chlorination deposition produces, and reduces the argent loss; Reduce production costs, also can reduce the pressure of dust collecting system.Adopt the inventive method, can reduce working strength of workers significantly, increase work efficiency.
Description of drawings
The process flow sheet that Fig. 1 adopts for the present invention.
Embodiment
The silver powder that produces in the electrolysis of precious metal smelting silver need wash, filters, dry, and centrifugal filter is adopted in the washing of silver powder, filtration, and the infrared light-wave continuous tunnel furnace is adopted in the oven dry of silver powder, and Fig. 1 is seen in technical process.The practical implementation step is following:
Claims (4)
1. an electrolytic silver powder low-consumption high-efficiency washs and drying means; It is characterized in that; This method is the electrolytic silver powder that contains Silver Nitrate electrolytic solution after the electrolysis to be sent into carry out centrifuging in centrifuging and the washing plant; Silver powder after the centrifuging is carried out repetitive scrubbing again send into heating, drying in the infrared drying plant, obtain the exsiccant electrolytic silver powder with the isolated silver powder in dehydration back.
2. a kind of electrolytic silver powder low-consumption high-efficiency washing according to claim 1 and drying means; It is characterized in that; The electrolytic silver powder that contains Silver Nitrate electrolytic solution after the electrolysis is carried out centrifuging, isolated nitric acid electrolytic solution after the centrifuging is returned electrolytic system handle the back cyclically utilizing.
3. a kind of electrolytic silver powder low-consumption high-efficiency washing according to claim 1 and drying means; It is characterized in that; Isolated silver powder after the centrifuging is continued to be retained in centrifuging and the washing plant; Filter and washing plant feeds zero(ppm) water continuously to centrifuge washing, silver powder is carried out repetitive scrubbing and dehydration again, wash to wash water pH value and equal 7; The mass ratio of control silver powder and zero(ppm) water is 1:0.8～1 during washing; In the centrifuge washing process washing water that filter out are drained into and carry out chlorination deposition in the chlorination tank, accomplish laundry operation after, with silver powder discharge port taking-up from centrifuging and washing plant, send into heating, drying in the infrared drying plant, obtain the exsiccant electrolytic silver powder.
4. according to claim 1 or 3 described a kind of electrolytic silver powder low-consumption high-efficiency washing and drying meanss; It is characterized in that; Said infrared drying plant selects for use the infrared light of short-wave infrared fluorescent tube directly silver powder to be carried out heating, drying, and short-wave infrared fluorescent tube wavelength is 0.76～1.6 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100659861A CN102605389A (en) | 2012-03-14 | 2012-03-14 | Low consumption efficient method for washing and drying of electrolytic silver powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100659861A CN102605389A (en) | 2012-03-14 | 2012-03-14 | Low consumption efficient method for washing and drying of electrolytic silver powder |
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| Publication Number | Publication Date |
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| CN102605389A true CN102605389A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100659861A Pending CN102605389A (en) | 2012-03-14 | 2012-03-14 | Low consumption efficient method for washing and drying of electrolytic silver powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264189A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for silver refining and continuous electrolysis |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2810682A (en) * | 1953-06-08 | 1957-10-22 | Ions Exchange & Chemical Corp | Process for electrolytically producing silver powder |
| GB2051862A (en) * | 1979-02-24 | 1981-01-21 | Duerrwaechter E Dr Doduco | Electrolytic reclamation of precious metals |
| JPS6230272B2 (en) * | 1979-04-30 | 1987-07-01 | Kimura Etsuchingu Kenkyusho Jugen | |
| CN1932083A (en) * | 2005-09-16 | 2007-03-21 | 灵宝市金源桐辉精炼有限责任公司 | Silver electrolyzing process |
| CN101638799A (en) * | 2009-08-27 | 2010-02-03 | 北京有色金属研究总院 | Device and method for preparing powder by continuous electrolysis |
| CN101701346A (en) * | 2009-11-28 | 2010-05-05 | 白银有色集团股份有限公司 | Method for increasing quality of cathode silver power |
| CN101845642A (en) * | 2010-05-14 | 2010-09-29 | 永兴县元泰应用材料有限公司 | Process for refining and purifying silver |
-
2012
- 2012-03-14 CN CN2012100659861A patent/CN102605389A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2810682A (en) * | 1953-06-08 | 1957-10-22 | Ions Exchange & Chemical Corp | Process for electrolytically producing silver powder |
| GB2051862A (en) * | 1979-02-24 | 1981-01-21 | Duerrwaechter E Dr Doduco | Electrolytic reclamation of precious metals |
| JPS6230272B2 (en) * | 1979-04-30 | 1987-07-01 | Kimura Etsuchingu Kenkyusho Jugen | |
| CN1932083A (en) * | 2005-09-16 | 2007-03-21 | 灵宝市金源桐辉精炼有限责任公司 | Silver electrolyzing process |
| CN101638799A (en) * | 2009-08-27 | 2010-02-03 | 北京有色金属研究总院 | Device and method for preparing powder by continuous electrolysis |
| CN101701346A (en) * | 2009-11-28 | 2010-05-05 | 白银有色集团股份有限公司 | Method for increasing quality of cathode silver power |
| CN101845642A (en) * | 2010-05-14 | 2010-09-29 | 永兴县元泰应用材料有限公司 | Process for refining and purifying silver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264189A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for silver refining and continuous electrolysis |
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Application publication date: 20120725 |