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The traditional method of smelting copper is to use large-scale equipment to produce large quantities of copper, such as induction furnaces and foundries.
Will Copper Melt In A Fire
However, with the widespread availability and practicality of copper, a new, small-scale technique has emerged in copper smelting. We no longer have to invest in expensive tools that can only be handled by trained metalworkers.
Pdf) Reducing Agents In Fire Refining Of Copper — Analysis Of The Reduction Process And Its Costs (journal: Rudy I Metale Nieżelazne, Vol. 58, Issue 12, 2013)
There are many different methods of melting copper, and each method uses a specific type of container and heating element, which may differ from other methods. We are going to tackle the simplest and most effective method of how to melt copper in a normal household setting using an oxyacetylene torch and a stovetop.
Wear gloves, mask and goggles to ensure maximum protection. Also, be sure to melt copper in a well-ventilated area away from flammable materials.
If the copper is in the form of copper coins, it is not necessary to go through this step, as the coins fit easily into the cross. However, if the copper is in the form of copper wire, you must first remove the outer insulation coating using wire cutters, as these are toxic when burned. Next, twist the copper wires into small curls and then place them inside the cross.
Turn on the torch and adjust the oxygen valves to raise the flame temperature as needed. Point a torch at the copper in the crucible and move it back and forth to ensure the heat is evenly distributed.
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Allow the liquid to cool until it solidifies into hard, copper rods. At this point, you can improve the copper’s shine by scrubbing it with your favorite cleaning agents. You can use hydrochloric acid, acetone, citric acid, ammonium soap etc.
The stovetop method uses a cast iron pan as the container and the stove as the heating element. Remember not to use a pan made of any metal that has a lower boiling point than copper. Otherwise, your pan may melt before your copper.
Place the copper pieces in an iron pan and cover with a lid to maintain the temperature.
Turn on the oven and set the temperature to the highest setting available. You’ll want to check your progress periodically to see if the copper is sufficiently melted.
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When using this method, remember to reserve a cast iron pan for the specific purpose of melting copper. For safety measures, store them in a completely separate place from your other dishes to ensure they don’t mix with the dishes used for cooking.
This method can be very simple to follow. However, different ovens have different temperature settings. Therefore, some may be able to reach the high temperatures necessary to melt copper, and some may not. A solid ingot requires a lot of metal to melt, and sometimes, those metals aren’t always readily available. For example, gold is very expensive and you have to melt down a lot of jewelry to make a gold bar.
On the other hand, copper is cheap and readily available; If you know where to find it. Fortunately, someone curious knows where to get some.
Desperate to make a large copper ingot, YouTuber Ingot Joe thought of using copper cables as an alternative… lots of copper cables.
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Since the copper ingot must be 99.9% copper, he decided to use several copper cables used to connect old-time telephone lines. After stripping the insulation from the cables, he prepared them into bundles before melting them.
To start the melting process, he placed the first batch of copper in the crucible and set the gas pressure to 0.1 MPa. This allowed the furnace to reach a temperature hot enough to melt the copper.
During this process, you will begin to see the flames inside the furnace change from their normal orange color to a bright green. This means that the copper breaks down and starts mixing with the gas inside.
After 15 minutes, Ingot Joe opened the furnace and added another batch of copper to the already molten mixture. He began mixing the molten copper with a metal tool, and removed the solid pieces to make sure they didn’t solidify.
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He repeated this adding and mixing process twice until all the copper flowers were melted. Once all the copper was liquid, he closed the furnace and prepared to cast his ingot.
You have to be very careful when pouring hot liquid metal, so Ingot Joe used his tongs to lift his crucible and pour its contents into the mold. Unfortunately, the molten copper was too heavy for one man to lift, and he spilled some of the material over the sides of the mold. Fortunately, he had the foresight to put some metal coating around the mold to prevent it from catching fire.
After pouring the liquid copper into the mold, he waited a while until it solidified. Once the copper cooled to a nice black color, Joe removed the ingot from the mold and placed it in an ice cube to speed up the cooling process.
All that was left for him was to polish the copper to reveal its natural gray color. Oh, and this weight, of course!
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After putting that fat block on the weighing scale, we discovered why the liquid metal was so difficult to cast in the first place. It weighed a little over 10 kg! That’s about as much as an average car tire!
Of course, ingots are worth more than a pair of car parts. He may sell it but for now, Ingot Joe is deciding the best place for his new copper ingot behind his workbench – along with his other creations.
Ingot Joe melts a lot of metal on his YouTube channel. Some metals he turns into ingots, while others are shaped into some fine metalwork.
Carlos Gators wrestle, and Gators, we mean words. He also likes good design, good books and good coffee.
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Next Post Interview: Dr. Logan Graves How to Make a Large DKIST Telescope Mirror April 26, 2021 10 minutes ready Yesterday my parents and I cast my first test cast in bronze. I suspected that copper could be smelted using coal instead of gas. The main test is not to make a good artifact, but to determine if my system can melt copper. I was very surprised at how quickly 500 grams of copper melted (less than 30 minutes). I added 12% tin, but my final metal is pink/red instead of the yellow I wanted. I definitely have some research to do when it comes to mixing the perfect bronzer.
A basic design I put together for testing copper smelting. The final color turned out to be slightly pink.
Coal worked well. We used only a small amount of coal. The whole process felt completely safe and the charcoal didn’t produce much smoke. My mom made sure I had pictures I could use to show the process and setup.
A fan was used to give more oxygen to the coal so that the coal became hotter. The furnace is made of double layer refractory blanket also known as ceramic blanket. The lid I put on the furnace definitely melted the copper faster.
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Adding charcoal to the crucible before lighting the fire and feeding it to the furnace helps remove oxygen bubbles from the copper.
In this photo you can see some steel wire inside the cross. This is an improvement in furnace design and melting through the furnace lid.
For my next artist, I plan to release a simple artwork in the “lost wax” process instead of the “lost foam” process I did here. We use cookies to make it better. By using our site, you agree to our cookie policy.cookie settings
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Copper is a transition metal that easily conducts heat and electricity, making it a valuable material in the manufacture of many materials. Copper is smelted into ingots or for storage
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