COMPLETE DRAWING PLANTS
Global Dom’s Products and Services
ROLLER HEARTH FURNACE
Roller hearth furnace
The furnace is a key piece of equipment in a cold drawing plant.
The purpose of the furnace is to treat tubes through the cycles of tempering, annealing and normalizing.
Temperatures vary from a minimum of 580°C to a maximum of 950°C. The furnace for this kind of plant is a roller hearth furnace, complete with loading and unloading services.
The combustion system takes place via:
- pulse burners with radiant tubes, in the case of controlled atmosphere treatments;
- open flame burners, in the case of treatments in the air.
The cooling section is placed downstream of the furnace.
What are the component parts of roller hearth furnace?
Handling of loading tubes
Handling of unloading tubes
Heating chambers with rollers
Controlled atmosphere plant
Combustion air plant and fuel equipment
Control and automation system
Hardware and software
How does it work and what can we achieve with this type of furnace?
The roller hearth furnace can accomplish the following treatments: annealing, normalizing, quenching and tempering in controlled atmosphere.
The treated MATERIALS are: tubes with various diameters, bars, bundles of wire and forged pieces.
HEAT TREATMENT occurs through natural gas with radiant tubes.
COOLING is kept under control, with programmed temperature gradients.
This type of furnace works at a HIGHEST TEMPERATURE of 1.100°C. Its BURNERS have radiant tubes with heat recovery.
It is used for the following SECTORS: energy, oil & gas, nuclear, aerospace and automotive.
Special insulating refractory materials, such as ceramic fiber blocks on the vault, bricks and ceramic fiber on the walls, resist the special atmosphere in the furnace, meaning the furnace lasts for many years.
ANALYSIS O2 – CO – CO2.
To guarantee a quality treatment on the pipes, there are dew points at several points along the line.
Our control and automation system keeps the whole line under control.