Carbolite Rotary Hearth Furnaces

Industrial rotary hearth furnace

• Atmosphere controlled rotary hearth for heating turbine blades prior to forging
• Maximum operating temperature 1300°C
• Silicon carbide heating elements arranged in 3 zones of control
• Controls fitted in a free standing cabinet
• Variable hearth speeds to accommodate different blade sections
• The annular hearth is 355mm wide
• Power rating : 50kW
• Throughput : 70kg/hour

Industrial rotary hearth furnace

• For compact sintering facilities using patented powder metal technology for the production of gold, silver and platinum wedding rings
• Powders are produced directly from the molten state and formed into rectangular sections known as compacts which require sintering
• The ring compacts are sintered in trays holding several hundred at a time
• Loading into the furnace is through the entry aperture
• The hearth pauses every 10° to allow another tray to be loaded, with the length of the pause adjustable to determine the length of the sintering cycle
• The rings are processed at 750°C to 800°C within a 95% nitrogen & 5% hydrogen atmosphere
• The furnace has been designed to allow for a sintering process lasting up to 24 hours
• Heated by 27 wire spiral resistance elements supported on ceramic tubes mounted horizontally above the furnace hearth
• The atmosphere is sealed in the furnace by two oil-filled troughs below the furnace hearth and curtains at the loading and unloading positions

Industrial rotary hearth furnace

• For heat treating titanium parts
• Charge 120kg/hour
• Chamber dimensions: hearth – 1200mm OD refractory disc
• Hearth constructed from hardwearing ceramic which is rotated through a sand seal via a variable speed motor
• Free radiating Kanthal “AF” elements mounted horizontally above the hearth in three zones
• Nitrogen is introduced into the chamber via the element terminal box. Maximum flow is approximately 200 l/min
• An oxygen probe monitors the atmosphere in the working chamber at a temperature above 750ºC
• Working temperature up to 1150°C
• Uniformity : ± 8°C for 180°C of hearth rotation directly opposite the door
• Three zones controlled by Eurotherm 2216 three term digital instruments
• located in a free standing control module
• Power rating : 80kW
• Power supply : 3 phase 415/240V 50Hz