The chamber ovens NRA 40/02 CDB and NRA 150/02 CDB are specially developed for debinding of ceramics and metallic powder injection molded parts according to the BASF CATAMOLD®-method. They are equipped with a gastight retort with inside heating and air circulation. During catalytic debinding, the polyacetal-containing (POM) binder chemically decomposes in the oven under nitric acid and is carried out of the oven by a nitrogen carrier gas and burned in an exhaust gas torch. Both furnaces have a comprehensive safety package to protect the operator and the surrounding. Model NRA 40/02 CDB is very compact and excels with its excellent cost-performance ratio. This model is pefectly suited for repeating lab processes and in production. As a professional production furnace, model NRA 150/02 CDB is also designed for frequent charge changes. The furnace has an automatic torch control that detects the end of the process measuring the torch temperature.

• Tmax 200 °C
• Process retort made of acid-resistant stainless steel 1.4571 with large swiveling door
• Four-side heating inside the retort through chromium steel tube heating elements for good temperature uniformity
• Horizontal air circulation for uniform distribution of the process gas
• Acid pump and acid vessel (to be provided by the customer) accommodated in the furnace frame
• Gas-heated exhaust gas torch with flame monitoring
• Non-wearing ceramic cup for uniform evaporation of the nitric acid

Version NRA 40/02 CDB

• Gas supply system with fixed values
• Safety package provides for safe shut-down and floods of the furnace with nitrogen in case of a failure
• Controller P 300 for setting the temperature curve

Version NRA 150/02 CDB

• Extensive safety package with redundantly operating safety PLC for safe operation with nitric acid
• Automatic gas supply system for nitrogen with mass flow controller
• Large, graphic touch panel H 3700 for entering data and for process visualization
• Adjustable acid volume and correspondingly adjusted gas spply volumes

Additional equipment

• Scale for the nitric acid vessel, connected to the PLC monitors the acid consumption and visualizes the fill level of the acid vessel (NRA 150/02 CDB)
• NCC software package for visualization, control and charge documentation of the process (NRA 150/02 CDB)
• Lift truck for easy loading of the furnace