10 Things to Consider When Buying Fuming Furnace

If you’re looking for an induction furnace for your foundry, please consider purchasing a used induction furnace. The used inductotherm melting furnaces in good shape will work efficiently and help you increase your production. However, before buying a used induction furnace for sale, you need to consider the following factors.

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1. Control Features of the Metal Melting Furnace

You want a used induction furnace that gives you more control over the operations. You should be able to control the emission of smoke, dust, and other associated pollutants. Additionally, the ideal induction furnace for sale should have temperature control features that allow you to regulate the power supply of the furnace. Metals have a different melting point. For instance, steel melts at 1,370 degrees Celsius (2,500 degrees Fahrenheit). As such, being in control of how much power an induction furnace consumes will help you melt metals at the appropriate melting points. This will ensure that you produce quality products. Before buying an induction furnace for sale, ensure that you are comfortable with the control features on the induction melting furnace for sale. Lastly, the ideal induction furnace should be easy to control, install, and maintain.

2. The Size of the Induction Furnace

Inductotherm melting furnaces are available in different sizes. Depending on the size of your melting foundry, you should select an induction furnace with a capacity that meets or exceeds the quantity of metal that you want to melt. Typically, induction furnaces occupy less space and are therefore suitable for use in foundries of all sizes. You will find a used induction furnace with a capacity as low as 60gr (2.5 ounces) and big ones with a melting capacity as high as 25,000Kg (55,000 lbs.). The needs of your foundry should guide the size of the used induction furnace for sale that you should buy.

3. Noise Produced by the Induction Furnace

If a used induction furnace is in poor condition, it may produce excessive noise when operating at maximum capacity. While there will always be some noise produced during smelting, a poorly-maintained induction furnace may be too noisy that it distracts the operations of your foundry. Today, furnace manufactures are working on noiseless induction furnaces. You may not get a completely noiseless furnace, but you should get one that doesn’t produce loud and scratchy noises that may affect the productivity of your employees.

4. Oxidation Loss

Ideally, the used induction furnace should have a lower oxidation rate. This translates to less waste produced in the smelting process, hence increasing your production rate. You want to buy the core type induction furnaces to enjoy a lower oxidation burn loss. If an induction furnace has a high oxidation rate, you will not only produce fewer units but also you will produce low-quality products.

5. The Furnace Shell

The furnace shell of a used induction furnace must be in top shape and of good quality. A loose furnace shell may lead to catastrophic accidents. Your employees may sustain serious and life-threatening burns in case the furnace shell has some loose parts. A durable and high-quality furnace shell will maintain the furnace quality even under constant heavy usage.

6. The Cost of a Used Induction Furnace

There are a lot of factors that come into play when determining the cost of an induction furnace. The size, model, and purpose of the induction furnace will largely influence the cost. The cost of a used induction furnace should be the last factor that you consider. Ideally, you should first ensure that the induction furnace is tailored to your needs, and it is in good shape. Additionally, consider the quality of the materials used to make the induction melting furnace. When the metal melting furnace ticks all the right boxes, you can then begin comparing prices.

While you will need to thoroughly examine a used induction furnace before buying, you will enjoy many benefits when you choose the right one. You should trust the top induction melting furnaces manufacturers to supply you with the best induction furnaces.

If you want to learn more, please visit our website Fuming Furnace.

What is a Muffle Furnace?

In basic terms, a muffle furnace is one which separates the sample from the fuel. This nomenclature dates back to a time when furnaces would use coal or other fuels to heat the sample. In these furnaces it was necessary in the lab to keep the sample free from contamination with the fuel. These days of course, most furnaces are electric, and there is less scope for contamination. Nonetheless, the name has persisted, and furnaces which separate the heating element from the sample are called muffle furnaces.

What is a muffle furnace used for?

Many industries use furnaces for heat testing of materials. Building materials, amongst other products, must be tested to determine how their properties stand up to high temperatures. Additionally, muffle furnaces are commonly used for heat treatment and curing of polymers and ceramics.

What to consider when buying a muffle furnace

When considering how to choose the best muffle furnace for your application, there are several variable to think about:

→ Temperature range

The primary point to consider is, of course, the temperature which needs to be reached. In general, standard muffle furnaces reach °C, which is sufficient for most hardening applications such as ceramics or polymers. Why °C? That’s the approximate temperature of carbon fire (orange fire produced by burning wood, etc.) It’s hot enough to melt gold and copper, and cure most inorganic products. With advances in technology, °C or even °C for materials testing, is achievable in the lab.

→ Chamber size

Once you have determined the temperature range, the next thing to consider is how big you need the chamber. What are you putting in the furnace? Of course, you want a muffle furnace chamber to be big enough to comfortably fit your samples. However if it is too big you will be wasting energy by heating more space than you need.

→ Door opening style

Perhaps not the first consideration that would spring to mind, but it is worth considering the way the door opens. Muffle furnaces are usually front-loading, but the door might open upwards, sideways or downwards. Furnaces with doors that slide upwards might be the safest option, ensuring the hot front of the chamber is facing away from the user. These might be the preferred option for educational settings, for example. Meanwhile doors that swing downwards can effectively provide a built-in heat-resistant work surface for placing samples during loading or unloading of the chamber. The available space will of course also dictate the best option for your lab.

→ Programs and computer options

The most basic muffle furnaces will allow the user to set and monitor the temperature. These might be ideal for labs using the furnace to cure materials, without the need to control the heating time. For materials testing, it might be necessary to have a more advanced programme, where the temperature ramp and time can be precisely controlled. Most of our furnaces come with a standard controller, with options to upgrade.

→ Other things to consider

Many basic furnaces can be upgraded to include additional features. This might be a chimney or exhaust system, allowing for smoke or gases to be vented from the chamber, or even collected for sampling; ports for adding additional monitoring equipment, or enabling an air inlet; additional timers, alarms, data loggers, USB ports for downloading data, sample trays, or stands. If you are interested in buying a new muffle furnace feel free to give us a call to chat about your upgrade options.

→ Warranty / Support

As with all lab purchases, it’s worth considering the warranty period, and what technical support is included with the purchase. All used muffle furnaces from Richmond Scientific come with a 30 day no-quibble money back guarantee, while new muffle furnaces from Nabertherm and Snol each include a 12 month manufacturer warranty.

Need help deciding? Our sales team are always on hand to discuss the best muffle furnace for your application on 270 433

Useful Downloads

Nabertherm Furnace Brochure

Snol Furnace Brochure

Please call us on 270 433 for prices, or

If you would like to download the datasheet for a specific muffle furnace, you will find them linked at the bottom of the product pages (where available).

Want more information on Arsenic Reduction Furnace? Feel free to contact us.