Melting furnaces

• Efficient remelting of both clean and contaminated scrap, including paint, plastic, and oil residues
• Advanced internal combustion and energy recovery reduce emissions—no afterburner required
• Significantly lower fuel consumption thanks to integrated scrap preheating and gasification
• Extremely low oxidation losses, minimizing metal wastage and maximizing yield
• Turnkey solutions ensure seamless integration and reliable operation
• Fully automated charging systems reduce manual labor and increase safety

• Integrated scrap preheating and gasification of organic compounds for optimal energy use
• Sophisticated, proven process control systems for consistent, high-quality remelting
• Energy recovery system that maximizes fuel efficiency and environmental performance
• Reliable turnkey plant design tailored for efficient scrap remelting workflows
• Automated charging equipment including precise and safe handling of scrap materials

The ECOMELT PS furnace type melts scrap efficiently and cost-effectively at high melting rates. It is built for scrap material like painted profiles with thermal break, baled litho sheets, UBC (used beverage cans), etc. containing up to 10 percent organic compounds.

If you use loose scrap types with moderate organic contamination, the best option for you is a multi-chamber furnace with a preheat ramp – the ECOMELT PR furnace.

The furnace design of single-chamber melting and casting furnaces is relatively simple depending on the individual application. The rectangular ovens feature a front door across the entire furnace width. This ensures full access during charging and skimming. Furnaces are designed either stationary or with hydraulic tilting.

These are pre-treatment and melting plants that are specifically designed for processing loose swarf and light-gauge scrap. The design is a result of extensive in-house R&D aimed at achieving outstanding cost-effectiveness and green operation.

The URTF type represents leading edge technology to sustainably contribute to environmentally sound yet economic scrap recycling. It is suitable for melting dross and low-grade scrap or material with a high iron content and designed for 3 different processes.

The efficiency of melting processes begins with good charging techniques. Automated charging machines give permanent reliable processes that minimizes cycle times.

Hertwich supplies railbound skimming machines for all chamber type melting and holding furnaces for swift and proper de-drossing of the melt as well as cleaning of furnace bottom and sidewalls.

Electromagnetic molten metal discharge pumps are a safe and very convenient means to tap melt from a stationary furnace into sows or crucibles or transfer melt via elevated launder systems to other furnaces. They provide an infinitely adjustable melt flow and can nearly drain furnaces completely, thereby avoiding to open a taphole.

Molten metal submerging systems are used to pull chips and small/light gauge scrap rapidly under the melt surface to avoid oxidation on atmosphere. The comprise electromagnetic inductors to induce vortex or linear vertical type melt flows in submergence vessels that generate the necessary downward and shear forces.

In close partnership with Hertwich Engineering, Exlabesa put into operation a Hertwich Continuous Homogenizing plant at its Padron based facility in the latter part of 2018. 

Otto Fuchs KG supplements its casthouse in Meinerzhagen with one Ecomelt-PS150 melting furnace and two tilting holding and casting furnaces from Hertwich Engineering. 

Cromodora Wheels SPA has installed a chip recycling furnace for wheel production in Ghedi, Italy. The furnace with a capacity of 10,000 tons per year was successfully supplied and commissioned by Hertwich Engineering.