Depending on the type of charge loading and workpiece geometry, there may be dead zones around the charge not seeing any flow or surfaces exposed to most of the cooling gas. To solve this problem, Ipsen has designed a rotary hearth for vertical furnaces whose speed of rotation can be adjusted in line with cooling requirements. This eliminates uneven gas flow distribution.
Rotary hearth furnaces ELTERMA S.A. Seco/Warwick Group Poland are used mainly in the following processes:
- Hardening
- Annealing
- Preheating before forging
- Preheating before hardening in the press.
ELTERMA S.A. manufactures the wide range of furnaces with a rotary hearth:
- in electrical and gas fired version
- for load up to 1.000 kg gross weight
- with manual and automatic loading of the charge.
ELTERMA S.A. rotary hearth furnace can be used in all processes where it is required the very good temperature distribution in the heating chamber and if the Customer needs the high capacity of the process at limited space of workshop.
For more information please contact:
B.Tustanowska@elterma.com.pl
Wellman Rotary Hearth Furnaces are useful for a number of processes including forging and forming, hardening, tempering, stress relieving and annealing. Units can be direct-fired or engineered for a controlled atmosphere with your choice of gas or electric heating. Temperature range to 2300°F (1260°C).
Precise indexing of the rotary hearth on Wellman designs is accomplished through a rack and pinion system and variable speed drive. Manipulators or custom designed load/unload equipment can be supplied.
Processes:
Hardening
Annealing
Preheating before forging
Capacity: up to 1.000 kg/h
Nominal temperature: up to 1.250oC
Advantages of rotary hearth furnaces offered by ELTERMA S.A.:
High temperature operation and load temperature uniformity inside the heating chamber
Full control of chemical balance of the processed parts
Automation of loading and unloading of the work pieces at rates up to 2 pieces per minute
Control of chamber pressure inside the furnace.
for drying, calcination, combustion and pyrolysis. Optimized sealing in and around your plants: no incalculable emissions, no secondary air %u2013 and therefore more accurate process control with noticeably lower primary energy consumption.
Rotary retort continuous furnaces are used to harden, carburize and carbo-nitride relatively small parts. Automatic loading and unloading make the continuous rotary retort system well suited for high production requirements. Selas rotary retort furnace systems are especially efficient in the production heat treating of automotive fasteners, ball and needle bearings, bolts, roller chain, nails, nuts, screws, sockets, and washers.
STANDARD MECHANICAL FEATURES
Fabricated alloy retort with load-conveying flights
Externally mounted retort support rollers
Gasketed removable rear plug assembly
Load feeder chute with flame deflector and continuous atmosphere ignition pilot
Atmosphere inlet and sample ports
Sight port for visual check of discharge
Nominal temperature: up to 900oC
Capacity: from 400 to 1000 kg/h
ELTERMA S.A. Rotary Retort furnaces are designed to maintain the consistently high production performance required for fast, economical, uniform heat treating of small parts.
Rotary Retort furnaces can be built as single unit or part of complete systems with tempering furnace, atmosphere generator and parts washer.
Main construction advantages of rotary retort furnaces offered by ELTERMA S.A.:
A specially designed vibratory hopper and weight-actuated skip loader deposit precisely measured charges into the furnace
High process efficiency
The same furnace can process many different sizes and types of parts. Process parameters and times can be easily and quickly changed
Retort rotation speed has a wide range to give maximum process flexibility processing cycle
Low furnace maintenance required.
Typical parts processed with ELTERMA S.A. rotary retort furnaces:
Screws,
Nuts and bolts.
Nails.
Bearing rollers and balls.
