Are you trying to find electric furnace for melting metals among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling electric furnace for melting metals on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 24 hours of research and did 31 electric furnace for melting metals tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best electric furnace for melting metals you can buy today
- 【EASIEST BEGINNER'S CASTING FURNACE】New to smelting and casting? Here is the first impression of a budget electric melting/smelting furnace using recycled sterling silver. DIY smelting and casting for silver/coppersmithing in a home studio. No need for fuel and oxygen tanks and open flames when casting with the help of TOAUTO TGF3000-V1.1 Smelting Furnace, you can reliably and safely explore this fantastic home smelting.
- 【THREE UPGRADED VERSION】 TOAUTO TGF3000-V1.1 version melting furnace enlarge the base makes the center of gravity more stable, adding two handling handles and Install a heat insulation net to make handling more convenient, avoid contact with high temperature of furnace wall during heating, and effective thermal insulation. This product conforms to the UL Standard (U.S.), [an Important Evaluation for Electric Appliances Safety].
- 【RICH ACCESSORIES FOR FLEXIBILITY】Upgraded TGF3000-V1.1 version electric smelter comes with rich accessories including 1KG graphite crucible +3KG graphite crucible +5-in-1 graphite ingot mold, enabling flexible combinations for melting with improved efficiency, professional use for the processing of precious metals, such as gold, sterling silver, and aluminum.Let them help because they can!
- 【PROFESSIONAL & WORK EFFICIENTLY】TOAUTO 1400W electric furnace can be heated up to 1100 °C / 2000°F and can melt metals with a melting point below 1100 ° C in 40-55 Minutes such as gold, sterling silver, pure copper and aluminum. Implanted in the highest-end precision PID temperature control program, the machine can monitor and correct the actual temperature. With only 4 buttons on the control panel and an easy-to-read Digital LED display. It’s just good for new players to skilled experts!
- 【IDEAL 7-IN-1 SMELTER KILN KIT】Comes with the parcel is TOAUTO TGF3000-V1.1 version gold furnace machine / one 3kg graphite crucible / one 1KG graphite crucible /one coin graphite ingot mold/one forceps /one pair of gloves/one power cord/ one Instruction manual. This smelting furnace is not only ideal for professional use of the industry and the workshop, but also a good melting helper at home.
- 【High Quality Melting Furnace】Power 1400W,3kgs of large compacity,voltage 110V,max.heating temp1100℃/2000 F, metals could be melted completely in 45-60 minutes. WARM TIPS: Always follow the instructions to ensure the best performance and lasting use, Feel free to contact us if any issue
- 【Graphite Crucible Designed】Grooved graphite crucible is specially designed for easy removal from the furnace,Insulated lid holds heat in and keeps oxygen out for a cleaner melt,say no to any metal waste.
- 【Smart Precise Controlling】Equipped with advanced PID module and digital control system to provide accurate and convenient metal melting, monitoring the actual temperature in the melting chamber at 2 second intervals, so that it will not overheat or cool.
- 【Smelt Quickly】The furnace wire seal integrated machine can be heated and heated quickly.It can be heated up to 1100 ° C and can melt metals with melting point below 1100 ° C in 48 Minutes such as: gold, sterling silver, pure copper and aluminum.
- 【Perfect 7-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / one graphite ingot mold / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This smelting furnace is ideal for professional use of the industry and the workshop. All Products TOAUTO will be provided for 1-year warranty after-sales and lifetime technical support.WARM TIPS：When working, mainly protect yourself and avoid high temperature burns.
- 🔥【New Model Electronic Melting Furnace】Upgraded structure, lower chassis, more stable center of gravity, less prone to tipping over, and safer. At the same time, the square design of the outer shell has 10% better insulation effect than the round shape, which can shorten the melting time by 5-10 minutes, saving your time and ensuring your safety!
- 🔥【Precise Temperature Control】The 3KG electric melting/smelting furnace adopts a PID digital control system and a high-precision temperature probe, allowing the furnace to obtain more accurate temperature information inside. It provides you with precise temperature variations
- 🔥【Professional Furnace, Fast Melting】Power: 1500W, 110V, MAX temperature 1150℃/2100°F. The high-power motor can quickly heat up, and the maximum temperature can reach 1150°C, melting metals with a melting point below 1100°C within 45-60 minutes. Ensuring efficient and effective melting
- 🔥【Give Your Jewelry a New Design】The melting furnace can recycle and cast various fast-melting metals, including gold, silver, lead, copper, brass, bronze, and aluminum. It is suitable for making DIY gold bars, commemorative coins, or jewelry, and can also be used as a melting assistant at home. This melting furnace is a must-have tool for you!
- 🔥【Perfect Six-in-One Melting Kit】Included in the package is a gold melting furnace machine, a 1KG graphite crucible, a 3KG graphite crucible, a pair of tongs, a high-temperature glove, a power cord, and an instruction manual
- 【2KG Compacity】2kg CRUCIBLE capacity; Power input:1400(w); Power supply: 110V, 50Hz; Max temperature is 1100℃/2000℉.
- 【Work Efficiently】The furnace wire seal integrated machine can be heated and heated quickly.Inner temperature can Be 1100℃, because of which metals could be melted completely in 40-48 minutes.
- 【Advanced Digital Control】Highly advanced PID module and digital control system,providing you precise and convenient metal melting,avoiding any issue of overheat or cool down.
- 【Work Safety】The melting crucible comes with a melting tongs that fit into the groove around the crucible head, which allows you to work safely with the hot melt crucible.
- 【The Warranty Time】 12 Months.We offer you the Best & Professional service, if you have any questions, please contact us firstly, we will always help you. And If our products have any problem, we promise help you within 24hrs.
- 【Safety First】The electric melting furnace features a premium mesh cover, providing comprehensive protection against scalding contact during operation.
- 【User-Friendly Design】Designed with a PID digital control system, the melting furnace ensures precise temperature control and enhanced accuracy for novice users.
- 【Professional-Level Performance】With a powerful 1400W heating element, the furnace operates at 110V and reaches a maximum temperature of 1150℃/2100°F. It can completely melt metals in just 45-60 minutes.
- 【Complete Melting Kit】This smelting furnace kit includes a 1kg+3kg graphite crucible, a versatile 5-in-1 graphite ingot mold, convenient melting pliers, and high-temperature gloves for a perfect melting experience.
- 【Versatile Applications】This foundry furnace is the ultimate tool for manufacturing gold bullion, silver ingots, and jewelry. It also serves as an efficient melting assistant for home use. WARM TIPS: Always follow the instructions for optimum performance and durability. Feel free to contact us for any assistance or inquiries.
- 🔥【3kg high purity graphite crucible & 500g graphite ingot mold】 Grooved graphite crucible is specially designed for easy removal from the furnace,Insulated lid holds heat in and keeps oxygen out for a cleaner melt,say no to any metal waste.
- 🔥【Precision temperature sensor】High-precision temperature probe installed making the furnace machine to get a more accurate temperature inside the furnace.
- 🔥【Smelt Quickly】The furnace wire seal integrated machine can be heated and heated quickly.It can be heated up to 1100 ° C and can melt metals with melting point below 1100 ° C in 48 Minutes. Suit for making gold nuggets, ingots or jewelry, smelting recycling scrap, refining jewelry, casting all kinds of fast-melting metals, including gold, silver, lead, copper, brass, bronze, aluminum, etc.
- 🔥【Perfect 7-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / Firebrick / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This smelting furnace is ideal for professional use of the industry and the workshop.WARM TIPS：When working, mainly protect yourself and avoid high temperature burns.
- 🔥【SAFETY FIRST | Firebrick & High-temp Gloves】 The secure crucible lid and nonslip padding under our metallurgical furnace ensures safe, steady, and spill-free work; high-temp gloves offer hand protection during lifting and pouring; and every piece includes wide and stable handles for sure grip
- Suits Novice Users: Embark on the exciting journey of home casting with our user-friendly melting furnace, designed to cater to novice users. This incredible tool eliminates the need for fuel, oxygen tanks, and open flames, ensuring a reliable and safe experience for beginners.
- Rich Melting Kit: This melting furnace kit including 1kg+3kg graphite crucible, 5-in-1 graphite ingot mold, melting pliers, high-temperature gloves. With this comprehensive kit, you can enjoy a seamless and enjoyable melting experience like never before.
- More Efficient & Professional: The 110V, 1400W electric melting furnace can heat up to a maximum temperature of 1150 °C / 2100°F, allowing for the melting of metals with a melting point lower than 1100 °C within 40-55 minutes.
- Precise Temperature Control: Incorporated with an advanced PID temperature control program, this melting furnace is equipped to accurately monitor and correct the actual temperature. The digital LED display allows for real-time monitoring of the temperature inside the melting furnace.
- Safety First: The electric melting furnace adds a protective mesh cover to avoid any scalding contact with the melting furnace during operation. The melting furnace is equipped with two ergonomic handles, making it more convenient for transportation.
- Gold Melting Furnace 1400W,110V,1150℃ Electric Digital,The Melting Furnace with compact design is ideal for professional use.
- The PID module monitors the actual temperature in the melting chamber at 2-second intervals so that it does not overheat or cool down. The temperature is kept constant around the melting point.
- Professional Use:for the processing of precious metals such as gold, silver and copper.
- Graphite crucible: high temperature resistance, good thermal conductivity, corrosion resistance and long service life.
- 100% Satisfaction Guarantee.one year warranty.
- 【Fast smelting speed, wide application】: Smelting furnace can completely melt gold, silver, copper, aluminum, lead and other metals with melting point lower than 1100℃ in 40-48 minutes. Adding borax can completely melt in about 30-35 minutes.
- 【Intelligent temperature control system】: The gold melting furnace is equipped with an intelligent numerical control display, which adjust the temperature so that the machine can smelt different objects through a more accurate temperature, prevent the temperature from being too high or too low.
- 【Safety in use, quality assurance】: Gold refining kit is made of thickened metal shell and heat insulation cover,Use high-quality crucible tongs to safely take out the crucible.
- 【High-quality 7-piece set】: Including 3kg metallurgical furnace, a mold, a crucible, a power cord, a crucible pliers, a pair of high-temperature insulating gloves, and a set of instructions.
- 【1 Year warranty period and 24-hour service】: Provide after-sales service and 1 year warranty period.
- ★ Premium Melting Furnace >>> - This electric melting furnace with 3 kg capacity has a high temp proof ceramic melting chamber, the quartz lid and inner tank, and graphite crucible. It can be heated quickly, up to 2000 ℉, within 45 minutes to melt metals entirely.
- ★High-Quality Crucible >>> - The crucible is made of pure graphite to melt high-purity precious metals. With excellent thermal conductivity properties, this crucible significantly shortens the melting time. Besides, the groove design facilitates the pouring and filling of the melts.
- ★Highly Advanced PID Module >>> - The gold melting furnace is equipped with an advanced PID module, digital control system, and K - type thermocouple to provide you with accurate and convenient metal melting. The current temperature in the melting furnace is monitored every two seconds without overheating or cooling.
- ★Complete Melting Kit >>> - In this electric smelter set, we provide everything you need: a 3 kg graphite crucible, crucible tongs, power cable, 5 in 1 mold and protective gloves. It's perfect for everyone, even for the beginner.
- ★Wide Application >>> - Our digital electric melting furnace can meet industry and workshops' requirements and is suitable for processing precious metals such as gold, silver, and copper.
![RIEDHOFF 3+1KG Gold Melting Furnace, 2100℉ [Digital Electric][Smelter Kit][Smelt Quickly] Smelting Furnace for Melt Scrap, Gold, Silver, Copper, Aluminum](https://m.media-amazon.com/images/I/51Rx7YzIKML.jpg "The 8 Best electric furnace for melting metals of %currentyear% 37")
- 【Safety First】The electric melting furnace adds a protective mesh cover to avoid any scalding contact with the furnace during operation.
- 【Perfect Melting Kit】This smelting furnace kit including 1kg+3kg graphite crucible, 5 in 1 graphite ingot mold, melting pliers, high-temperature gloves.
- 【Suits Novice Users】Melting furnace is designed with PID digital control system to get a more accurate temperature in the furnace.
- 【Professional Melting Furnace】1400W, 110V, max temp 1150℃/2100 °F, metals could be melted completely in 45-60 minutes.
- 【Wide Range of Applications】Foundry furnace is an ideal melting tool for manufacturing gold bullion, silver ingot or jewelry. It is also a good melting helper at home. WARM TIPS: Always follow the instructions to ensure the best performance and lasting use, Feel free to contact us if any issue.
- All New Design: The 2023 brand new pentagonal furnace has excellent melting performance. The exterior design combines stability and strength. With the rich accessories we provide, it can meet your various needs.
- Exclusive 2 Tongs:This furnace set is equipped with one lifting tongs and one pouring tongs. It allows you to safely and efficiently clamp the crucible filled with molten metal out of the furnace and pour the molten metal from the crucible into the molds.
- Efficient Smelting: The stainless steel burner is equipped with American standard regulator and hose, which can output 135,000 BTU. The furnace can be quickly heated to 1400°C/2552°F. One-inch-thick ceramic fiber insulation blanket and custom ceramic nozzles keep the barrel from turning red, trapping all the heat inside the pentagonal combustion chamber.
- Wide Range of Uses: 5KG of copper can be smelted at one time. The furnace can also melt glass and other metal materials such as aluminum, silver, and gold. Look forward to your one-of-a-kind creations with this melting furnace kit.
- What You Get: Furnace,Burner,Gas hose with regulator,Lifting tongs,Pouring tongs,Crucible,Torch,Fire brick,PTFE tape,Thumb screw,Manual.
- Anti-scald mesh: Fast Smelter comes with an anti-scald mesh that protects users from burns while handling hot metals, ensuring safety during the melting process
- High temperature: Gold Melting Furnace Kit can reach temperatures suitable for melting a variety of metals, including gold, silver, copper, and aluminum
- Temperature control: Electric smelting furnace features temperature control, allowing users to adjust the temperature to the desired level, ensuring that metals are melted at the correct temperature, resulting in high-quality casts and jewelry
- Easy to use: Gold Melting Kit is easy to use and requires no special training or knowledge. Simply plug it in, set the temperature, and add the metal to be melted
- Durable construction: Melting Furnace Kit designed to withstand the rigors of metal casting and jewelry making, a reliable tool for professionals and hobbyists alike
- Quick Melting: Designed to melt up to 100 troy ounces of gold in only 8 to 10 minutes!
- Maximum Temperature of 2200°F. 120 Volt Power.
- Melts gold, silver, lead, copper, zinc, precious metal clay, ceramics, and more.
- Portable, and compact design allows for easy transport.
- Includes a graphite crucible to match the model, as well as a pair of tongs. Made in the U.S.A
- 🔥【3kg high purity graphite crucible】 Grooved graphite crucible is specially designed for easy removal from the furnace,Insulated lid holds heat in and keeps oxygen out for a cleaner melt,say no to any metal waste.
- 🔥【Precision temperature sensor】High-precision temperature probe installed making the furnace machine to get a more accurate temperature inside the furnace.
- 🔥【Smelt Quickly】The furnace wire seal integrated machine can be heated and heated quickly.It can be heated up to 1100 ° C and can melt metals with melting point below 1100 ° C in 48 Minutes. Suit for making gold nuggets, ingots or jewelry, smelting recycling scrap, refining jewelry, casting all kinds of fast-melting metals, including gold, silver, lead, copper, brass, bronze, aluminum, etc.
- 🔥【SAFETY FIRST】The secure crucible lid and nonslip padding under our metallurgical furnace ensures safe, steady, and spill-free work; a protective mesh guard avoids any accidental contact with the heated furnace during operation; high-temp gloves offer hand protection during lifting and pouring, and every piece includes wide and stable handles for a sure grip
- 🔥【Perfect 6-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This smelting furnace is ideal for professional use of the industry and the workshop.WARM TIPS：When working, mainly protect yourself and avoid high temperature burns.
- 🔥【3kg high purity graphite crucible】 Grooved graphite crucible is specially designed for easy removal from the furnace,Insulated lid holds heat in and keeps oxygen out for a cleaner melt,say no to any metal waste.
- 🔥【Precision temperature sensor】High-precision temperature probe installed making the furnace machine to get a more accurate temperature inside the furnace.
- 🔥【Smelt Quickly】The furnace wire seal integrated machine can be heated and heated quickly.It can be heated up to 1100 ° C and can melt metals with melting point below 1100 ° C in 48 Minutes. Suit for making gold nuggets, ingots or jewelry, smelting recycling scrap, refining jewelry, casting all kinds of fast-melting metals, including gold, silver, lead, copper, brass, bronze, aluminum, etc.
- 🔥【Perfect 6-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This smelting furnace is ideal for professional use of the industry and the workshop.WARM TIPS：When working, mainly protect yourself and avoid high temperature burns.
- 🔥【SAFETY FIRST】 The secure crucible lid and nonslip padding under our metallurgical furnace ensures safe, steady, and spill-free work; high-temp gloves offer hand protection during lifting and pouring; and every piece includes wide and stable handles for sure grip
- Package Included:1 x electric furnace,1 x 2KG graphite crucible, 1 x instruction manual, 1 x pliers
- High-purity fiber alumina chamber for energy saving - chamber size: 60 mm diameter. x 150 mm deep. A heavy-duty graphite crucible with a capacity of 2KG.
- Precise temperature control, easy-to-read digital display and LED on/off indicator.
- Single point temperature control (temperature only, no control of heating and cooling rate and residence time). The complete accessory is included and can be used immediately.
- Dimensions: 20 * 20 * 40cm, Weight: 9kg, Voltage: 110V, 50 / 60HZ,Color:Red
- 🔥【3kg high purity graphite crucible & 500g graphite ingot mold】 Grooved graphite crucible is specially designed for easy removal from the furnace,Insulated lid holds heat in and keeps oxygen out for a cleaner melt,say no to any metal waste.
- 🔥【Precision temperature sensor】High-precision temperature probe installed making the furnace machine to get a more accurate temperature inside the furnace.
- 🔥【Smelt Quickly】The furnace wire seal integrated machine can be heated and heated quickly.It can be heated up to 1100 ° C and can melt metals with melting point below 1100 ° C in 48 Minutes. Suit for making gold nuggets, ingots or jewelry, smelting recycling scrap, refining jewelry, casting all kinds of fast-melting metals, including gold, silver, lead, copper, brass, bronze, aluminum, etc.
- 🔥【SAFETY FIRST | Firebrick & High-temp Gloves】 The secure crucible lid and nonslip padding under our metallurgical furnace ensures safe, steady, and spill-free work; high-temp gloves offer hand protection during lifting and pouring; and every piece includes wide and stable handles for sure grip
- 🔥【Perfect 7-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / Firebrick / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This smelting furnace is ideal for professional use of the industry and the workshop.WARM TIPS：When working, mainly protect yourself and avoid high temperature burns.
- Quick Melting: Designed to melt up to 120 troy ounces of gold in only 8 to 10 minutes!
- Maximum Temperature of 2200°F. 120 Volt Power.
- Melts gold, silver, lead, copper, zinc, precious metal clay, ceramics, and more.
- Portable, and compact design allows for easy transport.
- Includes a graphite crucible to match the model, as well as a pair of tongs. Made in the U.S.A
- Hansen, Amy S. (Author)
- English (Publication Language)
- 24 Pages - 08/01/2011 (Publication Date) - Rourke Educational Media (Publisher)
How to choose a good electric furnace for melting metals
Does the idea of finding a fantastic electric furnace for melting metals make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in electric furnace for melting metals. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top electric furnace for melting metals products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top electric furnace for melting metals on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top electric furnace for melting metals brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top electric furnace for melting metals based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the electric furnace for melting metals were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good electric furnace for melting metals, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your electric furnace for melting metals.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting electric furnace for melting metals for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our electric furnace for melting metals. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what electric furnace for melting metals should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on electric furnace for melting metals.
