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Certain heat treatment processes require a gas-fired chamber furnace. Short heating times due to the high power are a convincing argument. The chamber furnaces with powerful atmospheric gas burners cover a wide variety of these processes.
In the basic version the burners are manually ignited once at the start of the process. The automatic control system then takes over control of the temperature curve.
At program end, the burners are automatically switched off. Depending on the process, the furnaces can be equipped with automatically controlled fan burners and safety technology for debinding. Depending on the model, these furnaces can be upgraded with fully automatic fan burners and additional accessories. Certain processes release and vaporize solvents or other flammable vapors. The concentration of these vapors must be kept below a certain limit to prevent ignition. To avoid an ignition in the furnace, flammable vapors must be diluted with air.
For this purpose, the furnaces are equipped with an exhaust gas fan providing for a defined underpressure. A measurement system monitors this flow, while fresh air is simultaneously resupplied. In parallel, the furnace atmosphere is diluted by the inflow of fresh air.
The air circulation is also monitored by the measurement system. The chamber furnaces in the model series NB.. CL are used for heat cleaning of components. An optimum temperature uniformity is not a priority for these processes. Examples are heat cleaning of electric motors, coated surfaces of steel components or the nozzles of plastic injection molding machines. The furnaces are gas-fired and have an integrated thermal post combustion system which is also gas-fired.
The pre-set, low-oxygen respectively reducing atmosphere in the chamber furnace effectively prevents spontaneous combustion at the workpiece and subsequent damage as a result of over-temperature. In case of a burner flame malfunction or gas shortage the process is aborted.
In addition, the control system is equipped with an over-temperature limiter with manual reset that is set by the customer at a safe cut-off temperature to switch off the chamber furnace if the limit is exceeded. The chamber furnaces are not suitable for components and coatings that contain solvents or a high concentration of water. These models must also not be used for charges with low flash points such as wood, paper or wax.
The chamber furnaces of the model series N B.. BO are used for processes with large amounts of organic matters or high vaporization rates. These models can be used for products which are insensitive against temporarily uncontrolled temperature increases.
Processes in which the product or contaminations on the product are ashed by ignition can be also carried out safely in this type of chamber furnace. Examples include residual wax removal of pouring clustersfollowed by sintering, or thermal cleaning of oxide catalytic honey combs from soot or fuel residues.
The electrically heated N BO furnaces can be used for processes with exact temperature control and uniformity. For safety reasons, they are equipped with an integrated gas torch for igniting the flammable components in the gas mixture.
The accumulation of flammable components is avoided and their safe combustion is ensured. Following this, a subsequent process can take place up to max. For safety, the furnace door locks after the program was started and cannot be opened again until the temperature has dropped below a defined value. In case of burner malfunction or gas shortage the process is aborted. Fiber insulation, classified as non-carcinogenic and meander shaped heating elements for short process times. The bogie can be loaded outside the furnace.
When the design includes an electro-hydraulic lift door and a motorized bogie, the furnace can be opened while hot and the load can be removed for cooling or quenching. When several bogies are used together with a second door or bogie transfer system, one bogie can be loaded outside the furnace while the other bogie is in the furnace. This shortens process times and the residual energy of the furnace can be used when the new charge is heated.
Gas-fired bogie hearth furnaces distinguish by their unique efficiency. The use of high-speed burners allows for short heating times. The burners are arranged according to the furnace geometry providing for a optimum temperature uniformity.
Depending on the furnace dimensions, the burners can alternatively be equipped with recuperator technology to save energy.
The high-quality, long-life fiber insulation, classified as non-carcinogenic, with storage capacity provides for short heating and cooling times. Your way to Nabertherm.
Compact burners for standard models up to NB Only fiber materials are used which are not classified as carcinogenic according to TRGS , class 1 or 2. More information Foundry Process Control and Documentation. Exhaust port and powerful exhaust fan mounted on the furnace. Guide-in tracks for chamber ovens with bottom insulation. Safety Technology for Forced Convection Chamber Furnaces Certain processes release and vaporize solvents or other flammable vapors.
More information catalogue Foundry Process Control and Documentation. Gas burners for furnace heating and thermal post combustion. Dimensions on request. Bogie running on steel wheels with gear rack drive, no rails necessary.
Bogie hearth furnace with gas supply system. Bogie hearth furnace W S. Furnace chamber with eight high-speed burners. Dual shell housing provides for low outside temperatures Exhaust hood with fittings for further discharge of the exhaust gases Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN as temperature limiter to protect the furnace and load Defined application within the constraints of the operating instructions Additional equipment Automatic lambda control to set the furnace atmosphere Exhaust air and exhaust gas piping Recuperator burners utilizing part of the waste heat in the exhaust tract to preheat the combustion air and considerably contribute to energy saving Thermal exhaust cleaning systems Process control and documentation via VCD software package or Nabertherm Control Center NCC for monitoring, documentation and control.
Headquarters Nabertherm GmbH. Company Video. Electrically heated chamber oven KTR for drying of foundry cores with an alcohol-based binder.
Bogie Hearth Furnace
The chamber of the furnace is insulated with high temperature fiber insulation and mineral wool. The elements are assembled on the sidewalls of the chamber furnace to achieve a high temperature accuracy and easy maintenance. One or several circulation fans and motor-driven dampers for cooling are assembled on the chamber roof. The motor-driven bottom is built up by insulating and fire resistant bricks. The Bogie-hearth furnace has a pneumatic sealing between chamber and bottom. ElectroHeat Sweden AB manufactures a wide range of industrial furnaces and ovens designed and customized to a variety of load sizes, production volumes and material. Fast delivery and high quality is guaranteed since all construction and production is made in-house in our workshop in Gothenburg, Sweden.
Contact us Downloads. Request a quote. The robust construction of the SBCF large chamber furnace makes it ideal for applications such as the heat treatment of steels and alloys, ceramics sintering and aerospace heat treatment. The SBCF chamber furnace is an industrial scale furnace based on a modular design principle which can be adapted to various applications. The furnace chamber is cubic in shape and is available in three sizes. The furnace has a side hinged door and a fixed hearth. As an option the hearth can fitted to a bogie so it can be pulled out of the furnace on a track system.
Bogie Hearth Furnaces
The bogie can be loaded outside the furnace. When the design includes an electro-hydraulic lift door and a motorized bogie, the furnace can be opened while hot and the load can be removed for cooling or quenching. When several bogies are used together with a second door or bogie transfer system, one bogie can be loaded outside the furnace while the other bogie is in the furnace. This shortens process times and the residual energy of the furnace can be used when the new charge is heated. Gas-fired bogie hearth furnaces distinguish by their unique efficiency. The use of high-speed burners allows for short heating times.