Single-Coil Annealing Line SCL for Aluminum Strip
The Single-Coil annealing SCL provides a flexible solution for the heat treatment of coiled Aluminum strip. Single coils fully automatically can undergo their specific processing from storage to storage. This solution offers flexibility to the production with frequently changing requests for individual strips or if specific processing is applicable to only a small lot of strips.
For bigger lots the same furnace technology is applicable as Multi-Coil Annealing Line MCL.
Overview
The plant consists of several furnaces in line, which operate independently with a common charging system. The Single-Coil Lifting Hearth Furnaces SCL are loaded by the charging machine, which moves under the furnaces. From a central charging and discharging station the charging machine takes the coil and transfers it to the individual chamber. Each furnace unit is loaded with one coil only.
The furnace system is working with electric or natural gas heating. With fuel heating the burners are installed in δ-tubes, which allow indirect heating of the furnace atmosphere. The recuperative burners are equipped with heat exchangers for heating the incoming combustion air by the outgoing flue gas.
The furnaces are gas tight for processing the strips in inert gas atmosphere. For complete burning of adhering rolling oil, which evaporates during heating up the strip, the furnace line can be equipped with a thermal oxidizer.
With Single-Coil annealing there is no need for complex batch assembly, considering coils of the same size, alloy composition and annealing program.
For bigger batches of similar coils, the Multi-Coil Annealing Line MCL is the right choice. Here the furnaces are loaded with a batch of the same coils.
Specific benefits of SCL:
- Individual short heating-up and cooling time
- No overheating of coil edges
- Less space requirement
- Individual annealing of a single coil
- In time annealing
- Integrated fully automatic charging
- Automatic connection to warehouse system
- Individual recording of the processing
- Extendable line arrangement
- High availability
- Indirect gas firing or electric heating system
Specific benefits of MCL, besides the above mentioned:
- Treatment of large batches
- Homogeneous annealing temperature
- Extendable line arrangement
- Indirect gas firing or electric heating system
Technical data
Standard dimensions (coil-diameter – strip-width):
- 1800 mm – 1850 mm
- 2200 mm – 1850 mm
- 2800 mm – 2650 mm
Processing temperature up to 550°C
Cooling down to 150°C
Protective gas Nitrogen
Active gas N-CO mixture
Innovation
Single coil annealing allows individual strip treatment
Single coil annealing allows immediate reaction to production needs
Automatic connection to the storage allows fully automatic operation
Controlled heating curves allow heating with steps for oil evaporation
Safety & Automation
Safety
Fully automatic operation without manual interference
Automation
Fully automatic control and recording of the processing
Recording of processing for each individual coil
Remote service
Environment
Complete burning of harmful furnace atmosphere by thermal oxidizer
Less heat loss
Flue gas and strip heat recovery for use in the process
Digital
Integrated process data analysis
Predictive maintenance
Remote data analysis
Related Solutions
Modernization, Service & Spare Parts
Marc Reynaert
Head of Revamp & Modernization, Tenova LOI Thermprocess
