UMGEKEHRTE ELEKTROLYSE - REVERSE ELECTROPLATING - EIGENBAU EINER E-ZELLE
Für den praktischen Elektronikschottrecycler ist dieses Vefahren der umgekehrten Elektrolyse genau das Richtige, wenn es
darum geht größere Mengen an goldhaltigen Teilen schnell und effizient abzulegieren.
Dabei verwendet man in der Regel eine E-Zelle ("Entgoldungszelle"), die sich relativ einfach und schnell selber bauen lässt.
Ein wesentlicher Vorteil des Ablegierens mittels einer Elektrolyse ist der, daß es sowohl für metallische als auch für nichtmetallische
Legierungen geeignet ist und größere Mengen an Material wie etwa Goldpins oder vergoldete Steckkontakte relativ schnell und effizient recycelt werden können; aber auch für Goldschmuck ist dieses Verfahren ideal geeignet.
Was ihr dafür benötigt und wieviel euch das in der Regel kosten wird, das zeigen wir euch jetzt:
Einen hitzebeständigen Behälter:
Das kann in der Regel auch ein gut erhaltenes altes Jena-Glas sein - allerdings solltet ihr darauf achten, daß es einen Deckel hat.
In der Regel sind Elektrolysereaktionen stark exotherme Reaktionen, die große Hitze freisetzen. Deshalb muß die heisse Säure
unbedingt in einem hitzebeständigen Behältnis mit Deckel aufbewahrt werden.
Eine andere Möglichkeit sind Pyrex-Behältnisse, die sich ebenfalls für diesen Zweck gut bewährt haben:
Als Elektrolyt werden wir konzentrierte Schwefelsäure (H2SO4) verwenden. Man könnte zur Not auch Batteriesäure verwenden,
aber wenn man sich das ganze Prozedere des Eindampfens ersparen will´kauft man besser gleich original Schwefelsäure; am besten gleich 2-3 Liter davon.
Das ideale Metall für die Anode wird eine kleine Platte sein, die aus Blei besteht. Die bekommt ihr am besten beim Schrotthändler oder beim Eisenwarenhändler. In der Regel reicht eine Platte mit der Abmessong von 25x10 cm völlig aus. Wem das nicht ausreicht, der kann auch gleich eine 1 kg Bleiplatte kaufen
Für die Kathode verwenden wir ein Kupferblech. Das Blech lässt sich ideal zu einer Art kleiner Ablageschale biegen, auf der dann die goldhaltigen Teile in die E-Zelle eingetaucht werden können, ohne rauszufallen.
Als letztes brauchen wir noch ein leistungsstarkes Batterieladegerät.
Mindestanforderung: 15A Leistung, damit die Sache auch wirklich so wird wie man sich das auch wünscht.
Alles in allem kostet diese ganze Ausrüstung so um die 100 bis 120 Euro. Bevor man aber so richtig loslegen möchte, sollte man
auf jeden Fall noch einmal die Sicherheitsbestimmung für den Umgang mit gefährlichen Chemikalien lesen.
Konzentrierte Schwefelsäure ist nicht ungefährlich und kann im schlimmsten Fall zu schweren Verätzungen der Haut führen,
außerdem sind die entstehenden Dämpfe zu beachten, die gesundheitsschädlich für den Menschen sein können.
Wichtige Merkregel:
Gieße niemals Wasser in die Säure, sonst geschieht das Ungeheure!
Die E-Zelle immer mit dem Glasdeckel abdeckel um ein Herausspitzen der Säure zu verhinden!
Die E-Zelle soll immer in einen Auffangbehälter hineingestellt werden, damit im Falle des Auslaufens der Säure die Flüssigkeit
in jedem Fall aufgefangen werden kann.
Auf ausreichende Lüftung achten (Abzug verwenden oder besser den Versuch gleich im Freien durchführen)
Ein entsprechendes Anschauungsvideo gibt es im Forum - deshalb schnell den Blog abonnieren und auf dem Laufenden bleiben.
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Mikrowellengerät zu einem Schmelzofen umbauen:
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MICROWAVE GOLD KILN KIT |
(and old jewelry) in an ordinary microwave oven!!!Whether you are a Serious Prospector or, a Weekend Enthusiast, this NEW Microwave Gold Concentrate Kiln Processing Kit is made JUST FOR YOU !! All you need is a 1200 watt Microwave Oven, a few Tools … and …. You on your way to SMELTING !! Deluxe Kiln Kit $369Microwave Gold Kiln Kit Much research and experimentation has gone into the design of this kiln, to ensure the best results for separating fine gold from black sand concentrates. The stacked or layered design allows for replacement of damaged pieces, in the event of spills, while two shorter top layers enable the kiln to be stacked to different heights, according to the size (height) crucible used. Advantages • Replaceable parts • Simpler process • Less expensive • Less tedious • More funGPK Kit Includes • A versatile kiln consisting of layers of rigidized HD ceramic fiberboard capable of withstanding temperatures of over 2300 degrees Fahrenheit without warping or cracking • One kiln shelf • Five pounds of custom mixed flux • One pair of 18” scissor tongs, for lifting hot crucibles and pouring molten material • (4) 40 gram “one shot” clay crucibles • Detailed instruction bookletADDITIONAL MATERIALS NEEDED (Not included in Kit) • Heat proof gloves – welding type gloves are recommended • Welder’s leather apron • Dust respirator mask • Clear safety goggles • 12” x 12” clay tiles • Cast iron conical mold READ ALL INSTRUCTIONS THOROUGHLY Place the charged crucible on top of the kiln shelf in the center of the shelf. Stack the hollow kiln squares around the crucible, centering them around it so that the crucible does not touch the kiln and there is approximately 1 inch of clearance between the lid and the top of the crucible. Place the 1” thick solid kiln square lid on the top of the kiln. Carefully set the kiln inside the microwave, centering it in the microwave. Close the microwave door tightly and After 30 minutes, open the microwave door and, wearing heat proof gloves, safety glasses and apron, carefully lift the entire kiln out, holding it by the base. Hold the kiln with both hands when moving from microwave to heat-resistant surface. The kiln shelf will be very hot, so be sure to use caution here. Place the hot kiln on a heat-resistant surface. A 12” x 12” clay tile will work well. Carefully lift the lid to check the color of the crucible and contents. They should be glowing yellow-orange. If they are not, replace the lid and return the kiln and contents to the microwave and continue microwaving for an additional 10 minutes. Typical microwaving times are from 30 to 45 minutes depending upon the microwave you are using. Again,remove the hot kiln and place on a heat-proof surface. Lift the lid again carefully. Yes, I know they’re rare and that a lot of the ore can be worth several times spot price, as specimen material. However; I have found gold and silver ores in old abandoned mines and mine dumps that were nothing much to look at, that were very high grade. For instance, I know of an old mine in Nevada that select ore samples assay from 350 to 500 ounces per ton in silver that are nothing much to look at. I’ve also run across gold ores that as¬sayed over 2 ounces of gold per ton that you can’t see the gold in as well. Basically you can treat these free milling ores the same as the black sand concentrates and recover the metals from them. Obviously the ore needs to be finely crushed and panned down to a concentrate before firing them in the microwave kiln. The ores need to be “free milling” and in an oxidized state for the best results. I start with a 1 part dry ore concentrates and add 4 parts of the flux mixture, to charge the crucible. The ore concentrates can contain more impurities than the black sand concentrates and can be more difficult to work with, however, with experimentation, they can be smelted. There are different mixtures of fluxes that can be used, as well as processes that can be used for high grade sulfide ores. We won’t go into those processes at this time, however if you want to contact us regarding these practices, feel free to and we’ll help you tailor a process and flux for your ore.SCRAP GOLD OR SILVER JEWELRY, BULLION, COINS, ETC. Yes, you can smelt scrap gold or silver jewelry, etc., in your microwave kiln. The flux included in the kit makes this possible. Warning: Do not get into your wife’s or girlfriend's jewelry box, looking for something to smelt, without their knowledge; they remember EVERYTHING that’s in there regardless of what you may believe! 1. 1 oz. shot glass of flux added to the crucible. 2. Scrap gold and or silver placed on top of the flux up to 3 ounces. 3. 1 oz. shot glass of flux poured on top of the scrap gold or silver. Place the kiln into the microwave and microwave on high power for 35 to 45 minutes. I use a two depression conical mold and the above recipe will completely fill one of the depressions with the metal and molten flux. As with the black sand concentrates, your experimentation will ultimately determine the best recipe for your use, when smelting scrap gold and silver. I’ve been able to re-use the crucible several times when smelting scrap gold and silver. Since there are few impurities contained in the scrap, the process is much “friendlier” to the crucible. Always inspect your crucible carefully after each firing for erosion or cracks prior to reusing the crucible. CARE FOR THE FOLLOWING• KILN -The kiln included in the kit is constructed of a high temperature aluminum/silicate fiber board that has been coated with a silica based rigidizer at the factory to improve the compressive strength of the fiber board and to minimize the potential of dusting. Treat your kiln with respect and be gentle with it. Don’t toss it in the back of the pick-up and expect it to arrive at your destination undamaged. It’s a good practice to wear a dust mask when you’re working with the kiln and the provided flux, as the dust from both are hazardous. Be sure to maintain good ventilation in the workspace where you are using the microwave kiln.• KILN SHELF - Any moisture absorbed from the atmosphere will affect it, so keep your kiln shelf dry and protected from moisture at all times. Also: due to the high temperatures achieved in this microwave process, all kiln shelves will eventually crack due to thermal shock and you may notice a small hairline crack after using it. This is cosmetic only and does not affect the structural integrity of the shelf, as it is thicker than necessary and is well supported by the layer of kiln material beneath it. Even if the shelf were to break completely in two, it would still be safe to use, with caution.• MOLD - Always pre-heat the cast iron conical mold, to drive off any moisture, before pouring into it and to prevent HOT splatters from occurring. Always wear protective clothing and eye protection when pouring the crucible into the mold. Always wear your protective equipment and goggles when working with the cooling or cold borosilicate glass, as well as the buttons, after they have cooled and are coated with glass. Most of us are ugly enough without losing an eye or imbedding shrapnel into our skin.• FLUX - Keep the flux stored in a dry and safe location, away from children and pets. The flux contains several ingredients that you don’t want to eat or inhale. Wear your dust mask and gloves when mixing the flux and concentrates together. There’s enough bad stuff out there without breathing this stuff or wearing it.• CRUCIBLES - Store all crucibles in a dry area and make sure crucibles are completely dry. The slightest bit of moisture can cause a crucible to crack upon heating. It is highly recommended to “season” them before use: First, heat the empty crucible inside the kiln in microwave for 15 minutes. Remove the kiln and crucible from the microwave and allow it to cool. Repeat this process again for 15 minutes the second time. This drives off any moisture in the crucible. Your crucible is now ready to receive its first charge. This procedure should be followed for ALL new crucibles and for any crucible that may have been exposed to humid conditions in storage. Once again; you’ve got a lot of time and effort in your concentrates, so don’t skip this procedure. Cracked crucibles and their spills are no fun to clean up. IMPORTANT SAFEGUARDS • Keep your workspace free of flammable materials. • Do not use the microwave kiln in the house. The temperatures achieved during the process are in excess of 230 Fahrenheit and the danger of fire is too much of a risk. Also: there are fumes coming off of the crucible during the process that can be hazardous if not properly ventilated. • Allow at least 1 inch space between the top of the kiln and the ceiling of the inside of your microwave oven. • Allow the microwave to cool at least 20 minutes between firings. • Keep microwave door open between multiple firings, for effective cooling. Always remove the kiln from the microwave after firing, to prevent heat from building up in the microwave and damaging it. • Do not try to heat a crucible in the microwave alone, without Ceramic Fiber Kiln in place around it. • Do not leave microwave unattended while the smelling process is underway. • Immediately turn off the microwave if any sparking occurs or if a crucible breaks. If you cannot reach the control pull the plug. • Allow the microwave and kiln to cool before trying to deal with any type of spill. • Always clean microwave after use. • Do not attempt to fire materials other than listed in these directions. • Use common sense during this process, always wear your protective gear and the world will be great.DISCLAIMER No guarantee is given on the amount of gold or silver obtained from this process, as it depends upon the quality of your material to begin with. The kiln is not a toy and is not to be used by children. IT IS A KILN THAT ULTIMATELY GENERATES TEMPERATURES IN EXCESS OF 2300 DEGREES! Please do not allow small children in the same room when you are firing! Use at your own risk and follow all recommended and common-sense safety precautions! Seller is not responsible for accidents or injuries caused by hot kilns and your using one purchased from us acknowledges that you use it at your own risk. Please remember that a traditional kiln is composed of fireproofed materials and a microwave oven is made of materials that can burn under certain conditions. |
Open and Print Microwave Gold Kiln Kit instruction / PDF |
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Scientific-Production Company "GEOLASER".
Address: 630108, Novosibirsk, 1 Trolleynaya Street, Suite
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Telephone: 7 (383) 301-2555. • Cell phone: 7 (913) 911-3592.
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