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Overhead furnance with mobile quench bath
Highly felxible as regards type of charge and program switching times
High temperature uniformity
Simple handing
High efficiency
Fully automated handling possible
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Continuous heat treatment lines
1. Paternoster furnace for crankshaft stress relieving
2. Stress relieving roller furnace
3. Stress relieving conveyor furnace
4. Automatic line for polymerization of motorcar hoods
5. Roller furnace for atmospheric heat treatment
with oil quenching bath
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In pusher-type furnaces, the slabs are pushed over a fixed hearth. The ADAPT hot skid system (Link zu3.1.3.5.) patented by LOI minimizes
- energy losses and
- temperature differences in the charge
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Pusher furnaces ELTERMA S.A. Seco/Warwick Group Poland are the optimum design solution for the heat treatment and heat-chemical treatment processes of mechanical components for mass and high volume production.
Complete unit consists of:
- electrically or gas heated heating chamber
- the chamber of load cooling to the ambient temperature and the loading and unloading devices .
Both the whole transport of the load inside the furnace and the other functions are fully automatic, controlled by the programmable logical controller and the computer system enables to archive and identify individual load according to strict standard requirements for the automotive industry.
Elterma S.A. offers product with optimal solution of the chamber for controlled cooling of the load, the critical value for the whole heat treatment process of the components. Combined transport system of the load in the furnace consisting of the hydraulic pushers and chain pushers meets the optimal requirements as for the quality of the operation, reliability and gives more free room in the shop floor.
For more information please contact:
B.Tustanowska@elterma.com.pl
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Steel rods and pipes are mainly heat-treated using roller hearth furnaces. The high temperature consistency and low energy consumption of these furnaces, normally gas-fired, ensure reproducible quality and short treatment times. The processes used for heat treating non-alloyed and alloyed carbon steel pipes at temperatures between 450°C and 1050°C include stress relieving, recrystallizing, normalizing, soft annealing and spheroidizing in indirectly fired continuous roller hearth furnaces. For the spheroidizing of pipes made from high-carbon ball bearing steel, vacuum vestibules to completely isolate the furnace atmosphere from the surrounding air are essential, at least at the furnace entry. Vacuum vestibules are also needed at the entry and exit of continuous roller hearth furnaces for the bright solution annealing of high-alloy austenitic pipes. In the heat treatment of copper alloy bars and pipes, zinc, which can be easily oxidized, is the critical element in the alloy. Rapid cooling is essential to ensure that the zinc is kept in solution. This can be achieved using optional high-convection cooling chambers with a hydrogen atmosphere.
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Wellman's broad experience in building Roller Hearth Furnaces includes direct-fired and atmosphere furnaces for temperatures to 2100°F (1150°C). Fuel-fired or electrically heated designs are available.
These furnaces are ideal for lamination annealing, tube annealing and many other processes. For example, a successful Roller Heath line was provided for reheating molybdenum and tungsten sheets for rolling. It features a unique pulse-fired combustion system.
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Can-Eng’s Roller Hearth Furnace Systems are workhorses for heat treating a great variety of materials. Whether you are annealing, bright annealing, normalizing, reheating, stress relieving or tempering, Can-Eng furnaces deliver consistent quality and reliable performance.
•Excellent for atmosphere and non-atmosphere heat treating
•Capacity up to 80,000 lbs/hr
•Flexible processing capabilities
•Excellent uniformity part to part
•Suitable for long product processing
•Recuperative and regenerative burner designs available for fuel efficiency
•Both direct and indirect-fired combustion systems are available
•Versatile product conveyance.
•Rolls allow for direct product loading or the use of fixtures and trays.
•High alloy heat resistant cast rolls
•Uniform temperature in heating chamber.
•Capacity up to 80,000 lbs./hr. (37,000 kgs/hr.)
•Combined over/under hearth firing available
•A wide range of protective atmospheres are available
•A variety of convective heat transfer fans are available
Applications: Carbon steels, Tool steels, Aluminum, Alloy steels, Stainless steels, Brass, Copper
Processes: Bright annealing, Stress relieving, Annealing, Normalizing
Quench and Temper, Reheating, Tempering
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This is a continuous furnace suited for production of light alloy products such as engine parts and cast aluminum wheels. The solution heat treating process is ensured by good temperature distribution achieved through hot air circulation and a fast-feeding roller hearth mechanism to transfer the work load to the quench chamber.
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Reheating furnaces for blooms, slabs and billets
- car bottom, chamber and bell-type furnaces
- pusher-type furnaces
- suspended monorail furnaces with quenching and special dipping facilities for the quenching and tempering of axles, shafts and small parts
- conveyor-type quenching and tempering lines for forgings
- roller hearth furnaces for the heat treatment of wire coils
- special rotary hearth furnaces for the solution annealing and spheroidizing of CrNi steel wire coils
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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.
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Depending on the bloom size and capacity, either standard or special-design rotary hearth furnaces are available for heating large blooms.
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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
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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.
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Tyres with floating shims
Floating shims are machined and the sizing is so that the clearance in operation be optimum. Local stress to the mechanical parts is avoided and the ovality is low enough to keep bricks stability: in QATAR, the lining under the tyre could last more than 2 years.
Pinion and girth gear
The girth gear is linked to the kiln shell by flexible ties.
The pinion and gear assembly is lubricated by a very reliable paddle wheel system.
Roller stations
The sturdiness and good behaviour of Fives FCB roller stations
is ensured by: swiveling of the bearings at each end, the use of Main Metall(R) bearing which accept high loads, a direct and efficient water cooling, a trouble-free lubrication system.
Thrust roller
A sturdy thrust roller assembly ensures a scanning movement of the tyres on the rollers thus equalising the wear.
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HTT manufactures Rotary Kiln Systems that will operate at 12 - 100 Tons per Day. All system components are factory built and tested. By using a 309 SS liner and ceramic fiber insulation, we can shop assemble the largest systems without exceeding the weight and size restrictions of standard freight. Shop fabrication and on-site time is minimized. Complete systems can be designed, built, installed and operational in 3 months. System components are shipped as a standard Sealand type trailers. Locally available cranes and rigging equipment can assemble the system in just a few days. Electrical and piping installed in one week.
The unit shown in the attached pictures was delivered on Monday and in operation on Thursday morning the same week. The system is 12 Tons Per Day Rotary Kiln Incineration system for solid waste. The unit was installed by a private company with contracts with the US Customs, DEA, and FBI, for disposal of confiscated drugs.
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Rotary furnaces
Design and construction of complete melting plants for cast iron:
- Oxy-gas rotary furnaces, capacity: 1 - 25 t,
- Charging skip,
- Vibrating channels on trolley,
- Hydraulic mobile runners
- Filtering plants for fumes
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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
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Spirajoule is an electrically heated continuous flow heat treatment furnace that transports the product with a coreless screw. It is manufactured to provide optimal thermal transfer to a variety of finely divided wet and dry products.
The technology is based on ETIA’s exclusive patent of an electrically heated screw conveyor. The heat is generated by Joule effect which is obtained from a low voltage current applied directly to the coreless screw.
The auger lining is made of refractory material in order to provide a perfect and homogeneous heat transfer to the product as well as an optimal insulation of the furnace.
Maximum efficiency is achieved by the product's direct contact with the heated screw and radiation of energy from the refractory auger. Product dwell time, temperature up to 1000°C, and air extraction are easily adjusted. Full inspection of internal chamber also allows for easy cleaning. The injection of inert gases are also possible if required.
ETIA provides a wide range of Spirajoule models with several capacities.
Applications include: drying of minerals and industrial sludge, soil treatment, biomass pyrolysis, sterilization, and more.
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Industrial scroll drying furnaces
Ideal for drying supped or blind-hole components that can move around without problem for being damaged.
Typically used as an inline process with Burnishing, phosphate and galvanizing plants where the product must be dried with hot air.
Temperatures are around 130 ° Celsius.
These plants range from 200mm to 2000mm diameter and heating may be electric or gas.
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Can-Eng Continuous Steel Bar Heat Treatment Systems have fully integrated hardening, quenching and tempering for high volume and continuous production up to 40,000 lbs per hour of long products.
Their unique spray quenching systems maintain bar straightness and provide for extremely uniform metallurgical and mechanical properties.
•Hardening or heating for hot working
•Capacity up to 40,000 lbs/hr
•Fully integrated hardening, quenching and tempering
•Unique spray quenching system
•Continuous bar rotation
•Greater bar yield
Applications: Bars, Tubes, Carbon Steel , Alloy Steel, Stainless Steel
Processes: Normalize, Quench and Temper, Solution Anneal, Stress Relieve
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Small shaker hearth furnaces type Vi are mainly used for hardening parts that, because of their small size, would cause handling problems on a mesh belt or when production volume is too small to justify the use of a mesh belt furnace.
This type of furnace is ideally suited for watch parts, fine mechanical parts, sewing and knitting needles and similar.
Typical heat treatment applications, at temperature up to 950 °C include:
- Hardening or case hardening, with oil or polymer quench.
- Austempering and Martempering with hot oil or salt bath quench.
- All these treatments are carried out under controlled atmosphere
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With this furnace type the goods to be heated are transported through the furnace either lying on a conveyor unit, in a standing or hanging fashion, and are subjected to a precisely defined temperature profile.
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Walking beam furnaces are used for reheating conventional slabs with thicknesses up to 250 mm upstream from the rolling mill. LOI offers walking beam furnaces with top, bottom or partial bottom firing systems for hot-rolled strip, section, wire, pipe and sheet lines with capacities up to 400 t/h also for semi-finished brass, copper, nickel silver and bronze products with electric heating or gas or oil firing systems in some cases also with controlled atmospheres.
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Can-Eng’s Walking Beam Furnace Systems heat treat up to 80,000 lbs per hour of both symmetrical and non-symmetrical parts.
•Hardening or heating for hot working
•Capacity up to 80,000 lbs/hr
•Symmetrical and non-symmetrical parts
•Longitudinal or side fire design
•Excellent uniformity part to part
•Reliable and efficient
•Combined over/under beam firing available
•Capable of moving a variety of symmetrical and non-symmetrical parts directly or using fixtures
•Uniform temperature across width of heating chamber
•Recuperative and regenerative burner designs are available for fuel efficiency
•Human-Machine Interface (HMI) and Supervisory Control and Data Acquisition (SCADA) Systems are available.
•Precise rectilinear motion for exact part location at discharge.
•Nominal capacity up to 80,00 lbs/hr.(37,000 kgs/hr)
Applications: Leaf Springs, Coil Springs, Plates/blades, Bars
Tubes, Fixtured components, Billets, Blooms, Lift truck forks, Custom profiles
Processes: Hardening and tempering, Heating for hot working, Annealing,
Stress relieving
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The quality continuous heating furnace of Hanwha techM is the essential equipment for rolling iron related products.
Especially, the walking beam type heating furnace improves the quality of rolling products and reduces the fuel per square meters.
It is generally known that the walking beam type heating furnace is proper to the medium and large-sized equipment only, but it turns out to show excellent operating efficiency, security, and durability even in a small furnace with 20~30 tons /hour.
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Reheating furnaces for blooms, slabs and billets
- car bottom, chamber and bell-type furnaces
- pusher-type furnaces
- suspended monorail furnaces with quenching and special dipping facilities for the quenching and tempering of axles, shafts and small parts
- conveyor-type quenching and tempering lines for forgings
- roller hearth furnaces for the heat treatment of wire coils
- special rotary hearth furnaces for the solution annealing and spheroidizing of CrNi steel wire coils
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Continuous furnaces
