CA2134941A1 - Reclamation of metal plate - Google Patents
Reclamation of metal plateInfo
- Publication number
- CA2134941A1 CA2134941A1 CA002134941A CA2134941A CA2134941A1 CA 2134941 A1 CA2134941 A1 CA 2134941A1 CA 002134941 A CA002134941 A CA 002134941A CA 2134941 A CA2134941 A CA 2134941A CA 2134941 A1 CA2134941 A1 CA 2134941A1
- Authority
- CA
- Canada
- Prior art keywords
- metal
- base
- metal plate
- reclamation
- media
- 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.)
- Abandoned
Links
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
- C22B11/00—Obtaining noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- 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
-
- 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
- C22B25/00—Obtaining tin
-
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A method of removing exposed precious metal or any other plating from a metalic or non metalic base.
Although this process deals primarily with the recovery of precious metal the uses for removing electroplates for the primary up-grading of base metal are enormous. Such as tin on copper or brass.
This process also provides a alternative to the use of cyanide and or incineration.
Although this process deals primarily with the recovery of precious metal the uses for removing electroplates for the primary up-grading of base metal are enormous. Such as tin on copper or brass.
This process also provides a alternative to the use of cyanide and or incineration.
Description
:: : ::: : : `:: : : :
q ~
PRESENT METHODS
CYAN I DE STR I P
This process is made up of a cyanide base and a oxidizer such as hydrogen peroxide~ Alternativly a proprietary blend may be purchased. Just add water,stir and heat. Parts may then be submurged then agitated until the coatin~ is removed It is of the utmost importance that the proper chemistry be adhered to.Parts must then be rinsed at least twice.
Once the solution is pregnant additional chemicals must be added to release the precious metals. Once this has been done the gold or silver may be plated or precipitated out.
The barren solution will then be destroyed.The precious metal after being rir~sed may then be sent for further refining.
f:DVANTAGE5 TO THIS METHOD
The precious metal is reasonably readilY available.
The base metal,after thorou~h ri-nsLn~ LS available DISADV~NTGES
Proprietary strippers are expensive.
Cyanide in itself is not that expensive; however destruction and its control is Getting all the gold GUt may bc difficl~t at the best of times and under the best of circumstances ALTERN~`,TIVE METHOD
MELTING
When a material may be directly melted the process is quite simple.
~y usin3 sufficent heat,heat a crucible containing the material to be melted, possibly small amounts of flux may need to be added once the metal is brought to slightly above the melting point After this has been achieved~ although probably not quite that easily, the molten metal is then poured into a mold and alowed to solidify and cool.A sample is then taken and eventually assayed f~r ~
,"~e,.~.
The material is then ready for shipping.
213~
ADVANTAGES TO THIS METHOD
The contents are known quite readily and simply~
The process is reasonibly easy and does not carry with it a lot of ongoing costs~ Initial set up costs maY be conciderable.
DISADVANTAGES TO THIS METHOD
It is very expencive to have this material refined. Usually the precious metal content is low, single digit assay type material.
The cost could very well remove any returnable value of the precious metal and possibly that of any base metal payment, that is if any is allowed at all in the schedule. Generaly accountabilities and market prices are well in the fa~our of the end refiner on this type of low grade material.
MORE ALTERNATIVES
Possibly the most difficult is the circuit board type material~
This material may in fact have as much, if not more value inside than what is readily seen on the outside~ If the value of the non-exposed metal is signifant the material must go through the following methods~
Burning~ crushing and screening~ The burning is to reduce the mass to a point of embrittlement, crushing is to expose anything of value, screening is to seperate metalics from the fines~
Burning is done idealy in a controlled incenerator~ The material is then alowed to cool and is then put into a ball mill~ By using steel balls,of sufficent size the decomposed material is ground into a powder that may have the consistency of flour~ The ground material is then screened to approximatly minus forty mesh the over si~e is then melted as previously mentioned. The fines are then sent to a smelter for further recovery.
2134~41 SPEC I F I CAT I ON
THIS inventive process will perform the tasks as noted above by using a grinding action in conjunction with a abrasive media such as silica stone~ It has been discoverd that by abrading the surface to be removed with a combination of tumbling and a vibratory action the surface will be ground off. The removed surface is then rinsed along with any stone that has sacrafised itself during the grinding action~ The wet sludge will be washed out of the grinding apparatus after passing through a screen that holds back the larger stone~
This rinsing is carried on throughout the whole of the grinding process~ this enables the grinding media to remain effective~The wet sludge is passed from the grinding equipment to a f;ne filter~The sludge will remain on the filter while the somewhat clean water will carry on to a settling tank where any particulate matter will have the opportunity to settle out. ~ tank of sufficent size should be used to enable this to happen before the water is re-used in the rinse process~
It is determined that a good over all size media is in the one quarter to one-half inch size this enables the media to have considerable contact with the parts to be cleaned~
A visual inspection will tell you when the plate has been removed~
It is at that point when the clean parts must be seperated from the grinding media this will be done by passing both media and parts over a vibrating screen~ This will enable size differential to seperate the parts from the media~
At this point the sludge should then be prepared for meltin~ or alternativly shipping to a end refiner.If the material is to be melted it should be well dried and then be blended with 30 to 40%
of soda ash by volume~This will result in the soda ash and silica forming a clean slag~
There are NO HAZ~RDUS CHEMIC~LS.
There is virtualy no need for a drain~
Providing the stripped material is rinsed thoroughly there is no way for any thing of value to escape~ The system for reusing the water and media is closed looped~
q ~
PRESENT METHODS
CYAN I DE STR I P
This process is made up of a cyanide base and a oxidizer such as hydrogen peroxide~ Alternativly a proprietary blend may be purchased. Just add water,stir and heat. Parts may then be submurged then agitated until the coatin~ is removed It is of the utmost importance that the proper chemistry be adhered to.Parts must then be rinsed at least twice.
Once the solution is pregnant additional chemicals must be added to release the precious metals. Once this has been done the gold or silver may be plated or precipitated out.
The barren solution will then be destroyed.The precious metal after being rir~sed may then be sent for further refining.
f:DVANTAGE5 TO THIS METHOD
The precious metal is reasonably readilY available.
The base metal,after thorou~h ri-nsLn~ LS available DISADV~NTGES
Proprietary strippers are expensive.
Cyanide in itself is not that expensive; however destruction and its control is Getting all the gold GUt may bc difficl~t at the best of times and under the best of circumstances ALTERN~`,TIVE METHOD
MELTING
When a material may be directly melted the process is quite simple.
~y usin3 sufficent heat,heat a crucible containing the material to be melted, possibly small amounts of flux may need to be added once the metal is brought to slightly above the melting point After this has been achieved~ although probably not quite that easily, the molten metal is then poured into a mold and alowed to solidify and cool.A sample is then taken and eventually assayed f~r ~
,"~e,.~.
The material is then ready for shipping.
213~
ADVANTAGES TO THIS METHOD
The contents are known quite readily and simply~
The process is reasonibly easy and does not carry with it a lot of ongoing costs~ Initial set up costs maY be conciderable.
DISADVANTAGES TO THIS METHOD
It is very expencive to have this material refined. Usually the precious metal content is low, single digit assay type material.
The cost could very well remove any returnable value of the precious metal and possibly that of any base metal payment, that is if any is allowed at all in the schedule. Generaly accountabilities and market prices are well in the fa~our of the end refiner on this type of low grade material.
MORE ALTERNATIVES
Possibly the most difficult is the circuit board type material~
This material may in fact have as much, if not more value inside than what is readily seen on the outside~ If the value of the non-exposed metal is signifant the material must go through the following methods~
Burning~ crushing and screening~ The burning is to reduce the mass to a point of embrittlement, crushing is to expose anything of value, screening is to seperate metalics from the fines~
Burning is done idealy in a controlled incenerator~ The material is then alowed to cool and is then put into a ball mill~ By using steel balls,of sufficent size the decomposed material is ground into a powder that may have the consistency of flour~ The ground material is then screened to approximatly minus forty mesh the over si~e is then melted as previously mentioned. The fines are then sent to a smelter for further recovery.
2134~41 SPEC I F I CAT I ON
THIS inventive process will perform the tasks as noted above by using a grinding action in conjunction with a abrasive media such as silica stone~ It has been discoverd that by abrading the surface to be removed with a combination of tumbling and a vibratory action the surface will be ground off. The removed surface is then rinsed along with any stone that has sacrafised itself during the grinding action~ The wet sludge will be washed out of the grinding apparatus after passing through a screen that holds back the larger stone~
This rinsing is carried on throughout the whole of the grinding process~ this enables the grinding media to remain effective~The wet sludge is passed from the grinding equipment to a f;ne filter~The sludge will remain on the filter while the somewhat clean water will carry on to a settling tank where any particulate matter will have the opportunity to settle out. ~ tank of sufficent size should be used to enable this to happen before the water is re-used in the rinse process~
It is determined that a good over all size media is in the one quarter to one-half inch size this enables the media to have considerable contact with the parts to be cleaned~
A visual inspection will tell you when the plate has been removed~
It is at that point when the clean parts must be seperated from the grinding media this will be done by passing both media and parts over a vibrating screen~ This will enable size differential to seperate the parts from the media~
At this point the sludge should then be prepared for meltin~ or alternativly shipping to a end refiner.If the material is to be melted it should be well dried and then be blended with 30 to 40%
of soda ash by volume~This will result in the soda ash and silica forming a clean slag~
There are NO HAZ~RDUS CHEMIC~LS.
There is virtualy no need for a drain~
Providing the stripped material is rinsed thoroughly there is no way for any thing of value to escape~ The system for reusing the water and media is closed looped~
Claims (2)
1. It is claimed that the submitted process is a in expensive method of removing a metal coating or plate from base metal or from a organic base such as plastic or fiberglass. It is further claimed that it is a very efficent way to remove the silver bearing coating from photographic or x-ray film.It is also claimed that by recovering the plated surface in many cases the base becomes more valuble.The process is designed for the recovery of gold, silver ,tin and copper.
It is also claimed that it is with this mechanical grinding action in conjunction with the abrasive media that the metal plate is removed.
It is also claimed that it is with this mechanical grinding action in conjunction with the abrasive media that the metal plate is removed.
2. It is also claimed that the aid of the silica stone in the melting process is of importance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002134941A CA2134941A1 (en) | 1994-11-02 | 1994-11-02 | Reclamation of metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002134941A CA2134941A1 (en) | 1994-11-02 | 1994-11-02 | Reclamation of metal plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2134941A1 true CA2134941A1 (en) | 1996-05-03 |
Family
ID=4154580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002134941A Abandoned CA2134941A1 (en) | 1994-11-02 | 1994-11-02 | Reclamation of metal plate |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2134941A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498715A (en) * | 2014-11-27 | 2015-04-08 | 山东国大黄金股份有限公司 | Method for extracting gold and silver from acid making high-iron cinder and removing impurities |
-
1994
- 1994-11-02 CA CA002134941A patent/CA2134941A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498715A (en) * | 2014-11-27 | 2015-04-08 | 山东国大黄金股份有限公司 | Method for extracting gold and silver from acid making high-iron cinder and removing impurities |
| CN104498715B (en) * | 2014-11-27 | 2016-08-17 | 山东国大黄金股份有限公司 | A kind of extraction gold and silver method of removal of impurities from relieving haperacidity high-iron cinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |