Vacuum Granulator
The vacuum granulator is used to produce high quality and homogenous master grains and alloy grains, starting from raw material molten by induction heating in a protective atmosphere, and then poured into a water tank passing through a multi-hollowed crucible that acts as flow breaker.
The vacuum granulator adopts fully vacuum and inert gas melting and granulating, the machine can automatically stir in melting and the finished products have no oxidization, producing equal particles, good color and good sphere.
The vacuum granulator is especially suitable for the easily oxidized metals and alloys.
Details of vacuum granulator
Parameter of vacuum granulator
| Model number | SPB-VS5 | SPB-VS10 | SPB-VS20 |
| Power source | Three phase 380V, 50/60Hz | Three phase 380V, 50/60Hz | Three phase 380V, 50/60Hz |
| Power | 15 kw | 15 kw | 25kw |
| Casting system | Vacuum casting system | Vacuum casting system | Vacuum casting system |
| Applicable metal | Gold, K-Gold, Silver, Copper, Brass, Bronze, and their alloys | Gold, K-Gold, Silver, Copper, Brass, Bronze, and their alloys | Gold, K-Gold, Silver, Copper, Brass, Bronze, and their alloys |
| Melting time | 5-6 min | 5-6 min | 5-6 min |
| The Max capacity | 24K Gold: 5.0 kg 925 Silver: 2.5 kg | 24K Gold: 10.0 kg 925 Silver: 5.0 kg | 24K Gold: 20.0 kg 925 Silver: 10.0 kg |
| Max heating temperature | 1600℃ | 1600℃ | 1600℃ |
| Max. temp control k-type | 1100℃ | 1100℃ | 1100℃ |
| Casting chamber size | D275*H1100mm | D330*H840mm | D385*H1000mm |
| Dimension | 730*935*1600mm | 800*1020*1700mm | 850*1050*1800mm |
| Weight | 175KG | 235KG | 265KG |
| Protective gas | Argon | Argon | Argon |
| Vacuum pump (Optional) | 63 m³/hour | 63 m³/hour | 63 m³/hour |
| Control of temperature | by PID | by PID | by PID |
| Accuracy of temperature | ±2 degrees Celsius | ±2 degrees Celsius | ±2 degrees Celsius |
| Vacuum filter | Y | Y | Y |
| Vacuum leakage detector | Y | Y | Y |
| Casting chamber lift | Y | Y | Y |
Features of vacuum granulator
- Heating coil with low-voltage design, insulted heating, safe, and table.
- The induction generator is designed to allow the homogenization of the alloy thanks to the stirring effect of the magnetic field which works while the metal is being melted in the crucible.
- Water in the tank is continuously circulating and it is cooled by a powerful chiller to keep the process variables under control and obtaining consistency and quality in the produced grains.
- Easy to get materials from granulating barrel and can supplement cooling water.
- The finished products have no oxidization, producing equal particles, good color and good sphere.
- The equipment is equipped with a water pump in the water tank. The vortex is generated by the water pump to keep the water flowing, which prevents the particles from sticking together during the granulation process and ensures the granules more independent.
Application of vacuum granulator
The whole process is completed under vacuum to avoid metal oxidation
Through induction heating metal, no flame, to ensure safety
Vacuum casting the granules are smooth, shiny, no air hole and high density
Why SuperbMelt Vacuum Granulator
Any Question About SuperbMelt Vacuum Granulator
FAQ Guide of Vacuum Granulator
Vacuum granulating machine is what you need to invest in when looking to make some fine gold, silver or other granules of precious and non-precious metals. Suppose you are looking for some of the most frequently asked questions about the vacuum granulating machine, then you have come to the right place.
In this piece, we have tried to be as comprehensive as possible with our responses about the vacuum granulating machine. However, if you have a question that you feel we have not addressed in this piece, be sure to let us know in the comments. Our experts will make sure you get the most professional response possible.
- 1. What does the term granulating means when working with gold?
- 2. How do you do gold granulation?
- 3. What are the types of granulation?
- 4. What is the meaning of granulation?
- 5. At what heat does gold melt?
- 6. What temperature does gold solder melt?
- 7. How much gold do you lose when you melt it down?
- 8. Can I melt my own gold?
- 9. How do you melt silver balls?
- 10. What are the advantages of granulation?
- 11. Why do we use granulation?
- 12. How to choose the right non-ferrous metal melting furnace?
- 13. How long does gold take to melt?
- 14. What can you use as a crucible for non-ferrous metal melting?
- 15. How do you get gold from gold ore?
- 16. How do you melt gold dust?
- 17. What can I use as a crucible?
- 18. Can you melt gold and silver off electronics?
- 19. How much borax is needed to melt gold?
1. What does the term granulating means when working with gold?
When granulating gold with vacuum granulating machine, you will be using our machine to turn your gold into grains that you can easily handle work. With the machine, you will get high quality and homogenous grains. Once you have the grains, you will pour them into a water tank with the help of a multi-hollowed crucible.
There are so many things you can do with the grains. Remember, you will have to begin from the raw material that has been molten with the help of induction heating. If you ask any jeweler, they will tell you that the master grains must have certain level of quality to meet the industrial standard.
However, the machine we have at Superbmelt is best for alloys and metals that have been easily oxidized. Note that you don’t have to be the best jeweler to know what clients or customers are looking for when producing the master grains and alloys.
2. How do you do gold granulation?
Granulation might be an old process, but the machines used to complete the process have undergone major transformation. With the help of technology, Superbmelt has formulated a powerful induction furnace that you can use to complete the granulation process. Provided you have the right materials, granulation should not take a lot of your time to complete.
To begin the process, take your induction furnace and put the crucible in place. Remember, the crucible should be made of a material with a higher melting point compared to that of gold. Unless you do that, you the crucible will melt and the granulation process will not be successful one.
Place a large piece of gold on the crucible and turn on your induction furnace to commence the heating process. Heat the gold to its melting point and right below the crucible, there will be some holes. Your liquid gold will go through the hold at the bottom of the crucible to drop inside water.
Since the water is cold, it will force the liquid or molten gold to form granules. Note that our induction furnace will complete the process in a matter of minutes based on the amount of gold you are trying to melt.
3. What are the types of granulation?
Induction heating is the working principle of our induction furnace or you could say a vacuum granulating machine.
Induction heating is the type of heating that can be best described as non-contact for highly conductive metals. The primary principle of induction heating is mainly based on two perfectly known situation:
First, we have the electromagnetic induction. In this case, the heat energy transferred to the metal you are treat to heat is via electromagnetic induction. Any metal that is electrically conductive is positioned in a variable magnetic field. It then becomes the central focus of the induced electric currents, also known as the eddy currents. When this happen, you will end up with what is known as the joule heating.
The next situation is known as the joule effect. Note that joule effect can also be referred to as the ohmic heating as well as the resistive heating. In this process, we will pass some electric current via a conductor that emits heat. In this regard, we will end up with heat that is proportional to the square of the current multiplied by the available electrical resistance of the wire.
Induction heating depends on the characteristics of high frequency energy, which is part of the electromagnetic spectrum in infrared energy and microwave. The heat is transmitted to metal through electromagnetic waves, so the part is not contacted with the flame, so the inductor itself is not hot and there is no contamination of the product. Induction heating is fast and clean heating and not bubbles.
The operating principle of the vacuum induction fusion furnace is different.
The nucleus-induced melting furnace is used to heat (the melted size depends on the frequency of the power supply) is packed in a vacuum oven. The oven load melts in vacuum or inert gas. A vacuum system extracts a vacuum using the primary vacuum pump and a reinforcement pump. It is composed of valves and vacuum instruments. Chilling the induction heater and type under the water cooling conditions. Merge the molten metal under vacuum conditions and thrown.
4. What is the meaning of granulation?
Granulation is the process of heating gold or other precious metals in an induction furnace or even vacuum granulating machine. The induction furnace produces enough heat to melt your precious metals, say gold. Once the gold has turned into a liquid, there is a huge tank of water below the crucible.
The large water tank is found right below the crucible of your induction furnace. The curable has some holes beneath it, so that the molten or liquid precious metals can flow through the hold and into the water.
Since the water has a lower temperature, it will cool down the droplets of the molten precious metals, thereby turning them into granules. That is the only way granulation can be done, and you can get some help from Superbmelt with the whole process.
5. At what heat does gold melt?
Gold will always melt at the temperature of 1064 degrees centigrade. However, when it comes to melting gold, in some case, you will notice that the temperature goes a little bit high before the whole thing begins to melt.
That problem might be caused by too many impurities in the gold that you are trying to melt using vacuum granulating machine. Therefore, before you begin heating gold for your granulation needs, you must ascertain that what you are dealing with is pure gold and nothing else.
If you heat gold in a crucible, make sure that it is made of a material with a higher melting point compared to that of gold. Suppose that material can’t stand extreme temperatures, it will melt way ahead of gold and all your setup will be messed up.
6. What temperature does gold solder melt?
Unlike pure gold, gold solder has a very low melting point. That is to say, it has a melting point of around 321 degrees centigrade. And if you keep heating solder even after it has reached its melting point, it will boil at a temperature of 7678 degrees centigrade.
Note that it is not very advisable to keep heating solder when it has attained its boiling point. If you keep doing that, it will vaporize and mix with air to make a highly poisonous gas known as the cadmium oxide fume.
But the thing is, it does have a lower boiling point compared to that of pure gold.
7. How much gold do you lose when you melt it down?
When you melt gold, you might or might not lose any of it. The results will always vary from job to job. If you ask around, many people will report that you must always lose some gold whenever you melt it down.
But the truth is, even when you melt, you will never lose too much gold. The lose will most of the time be caused by filling and sawing the gold object. However, even if that happens, you will only lose between 0.5% and 1% of your gold.
The amount of gold you lose will always vary from work to work and the environment in which you are doing the melting. The other thing you should note is that when you are dealing with 24 karat gold, you will not lose any of it.
That is true because 24 karat gold will never vaporize or oxidize, so it will always remain the same even when you melt it in the vacuum granulating machine.
8. Can I melt my own gold?
Yes, it is very possible to melt your own gold without any problem. All you have to do is to ensure that you have all the requirements. For instance, you need to make sure that you have the best crucible where you will be doing the heating.
At Superbmelt, we have the best gold melting machines that you might want to invest in. Remember, when melting your own gold, you must hit it to the required temperature and keep checking to ascertain that the heat doesn’t consume the crucible.
Also, according to experts, you must put in protective gear since some accident might occur while you heat your gold. If you try to heat your gold and things don’t go as planned, get in touch with us and we will show you how to do it without any problem.
9. How do you melt silver balls?
You don’t need too many materials to melt silver balls. You only need to invest in a blowtorch and a brick. Are you looking to only melt tiny pieces of jewelry, then you only need to get a kitchen blowtorch.
Your silver jewelry debris can melt to give you a nugget. To do that, use them to make a pile of silver debris and place on a brick. Begin heating with a torch.
Note that if the color of the flame turns to blue, then it indicates the temperature of 1200 degrees centigrade. If you are dealing with pure silver, then you should expect it to melt at a temperature of 926 degrees centigrade.
If you melt silver, it will give you a molten ball that will easily fuse with other molten silver balls available. This explains why granulation of silver is a practicable process that you can easily do at home without investing in too many things.
10. What are the advantages of granulation?
The benefits of granulation with the help of vacuum granulating machine might seem far-fetched, but they all make sense. For instance, someone might want to granulate their jewelry to make them look attractive. Granulation is to make gold into particles, which is convenient for weighing, sales, and subsequent processing, etc
11. Why do we use granulation?
The benefits of granulation with the help of vacuum granulating machine seem implausible, but they all make sense. For example, someone may want to grind their jewelry into particles to make it look attractive. This is the first advantage of granulation. Makes less attractive things more attractive. Even in jewelry, you can grind it to improve quality.
For example, if you have a piece of jewelry that looks too simple, you may want to add value by grinding it up. In this way, when you put it on the market, you can sell it for huge profits. Another advantage of granulation is that it can make things that are originally fragile last longer.
In most cases, if you don’t handle it properly, your jewelry can easily break, but if you make them granular, they will not deteriorate easily. Another benefit of granulation is that industry can use it to make machine parts. If friction is required, they can choose to granulate the surface to achieve this goal. These are one of the many reasons why individuals and businesses today may find granulation to be an important.
12. How to choose the right non-ferrous metal melting furnace?
Would you like to have the best non-ferrous metal melting furnace? There are things you must have in mind before you begin looking. For instance, when you want the best, think about its power efficiency.
It is vital to consider using our induction furnace or vacuum granulating machine since it comes with a wide range of features for the most pleasurable application process. It does not consume a lot of power and is also perfect for environment.
Our induction furnace doesn’t require a lengthy learning curve to operate. If you choose our induction furnace, you will save a lot of money since it doesn’t consume a lot of power.
13. How long does gold take to melt?
There is no standard time your gold will take to melt completely. The temperature will determine whether your gold melts faster or not. For example, if you heat to the melting point within five minutes, then your gold will practically take five minutes to melt.
Also, if the pressure keep fluctuating, then the gold will take too long to attain its melting point. Thus, make sure that you use the right furnace to attain the melting point and maintain that temperature for the longest duration possible.
The pressure inside the crucible of the vacuum granulating machine might also make the gold to melt faster. However, you don’t have to focus too much on pressure to make your gold melt faster than usual.
14. What can you use as a crucible for non-ferrous metal melting?
Graphite or silicon carbide are the best materials to use for crucible meant for heating non-ferrous metals. If you are not sure why that is the case, silver and gold have very high melting points.
Silicon carbide and graphite have melting points of around 1600 degrees centigrade. If you heat up to that level, you shall have melted most of your gold. You don’t have to keep heating your non-ferrous metal to 1600 because they have way lower melting points.
But if you must heat metals with melting temperatures higher than 1600 degrees centigrade, then you might have to reconsider the material used to make your crucible.
15. How do you get gold from gold ore?
When you are looking for the best way to remove gold from gold ore, you should consider using smelting. Smelting is different from smelting in that with smelting, you will heat gold to attract impurities from it.
Smelting is not a very simple process. It involves the use of cyanide. You need to put the gold in a tank that contains weak cyanide solution and then adding some zinc.
The zinc is great because it will lead to a fast chemical reaction that separates gold from its natural ore. From there, you want to use filter press to remove gold from the ore.
Smelting can still be done with the help of a crucible. All you have to do is place gold ore in a crucible and turn on your furnace. You will heat while removing the impurities since most of them will always have lower melting compared to that of gold.
The problem with this technique is that getting 100% pure gold is close to impossible. If you have to use it, you will need a lot of time and dedication.
16. How do you melt gold dust?
To complete the process, you will need to use Superbmelt induction furnace. To get ready to melt your gold, you need to sprinkle some borax on it. Place it in the oven and commence the heating process.
Keep heating while increasing the temperature of your oven until you see that the gold has started to melt. As it nears its melting point, the gold should look bright with some green on it. All particles will melt together and form a small bright ball.
Remember, to melt your gold dust, you don’t have to use too much borax. There is no need to place your gold dust in a crucible to melt it.
17. What can I use as a crucible?
There are many options out there if you are looking for something to use as a crucible. Note that you can choose based on what you would like to heat using the crucible. There is no need to use something with extremely high melting point when you only need to heat items with very low melting points.
We have already seen that when you want to heat non-ferrous metals, it is advisable to go for something with very high melting point. Graphite or silicon carbide are the best materials to use for crucible meant for heating non-ferrous metals. If you are not sure why that is the case, silver and gold have very high melting points.
Silicon carbide and graphite have melting points of around 1600 degrees centigrade. If you heat up to that level, you shall have melted most of your gold. You don’t have to keep heating your non-ferrous metal to 1600 because they have way lower melting points.
But if you must heat metals with melting temperatures higher than 1600 degrees centigrade, then you might have to reconsider the material used to make your crucible.
18. Can you melt gold and silver off electronics?
Yes, just like you can remove gold and silver from their natural ores, you can easily get them off electronics. The problem with this technique is that you will spoil the electronics, but it makes sense if you all you need is to get silver and gold from electronics.
19. How much borax is needed to melt gold?
You don’t have to use too much borax to melt your gold. Per ounce of gold, you only need two pinches of borax. But if you are dealing with some dirty pieces of gold, you might need to use more borax to complete the melting process.
Vacuum granulating machine is what you need to invest in when looking to make some fine gold, silver or other granules of precious and non-precious metals. Suppose you are looking for some of the most frequently asked questions about the vacuum granulating machine, then you have come to the right place.
In this piece, we have tried to be as comprehensive as possible with our responses about the vacuum granulating machine. However, if you have a question that you feel we have not addressed in this piece, be sure to let us know in the comments. Our experts will make sure you get the most professional response possible.
© Copyright 2008-2021 Superb Electromachinery Co., Limited