High Hydrogen Gas Bright Belt Annealing Furnace for Steel - Eco-Friendly Solution by China Suppliers and Factory
Product Introduction
The bright belt annealing furnace is an advanced industrial equipment used for non-oxidative heat treatment of metal coils, pipes, wires, etc. in a protected atmosphere or vacuum environment. Its core objective is to eliminate internal stress in the material, improve mechanical properties, while maintaining the original bright surface of the metal and avoiding the formation of oxide scales and decarburization layers.
Core Principles and Characteristics
The core principle is to isolate oxygen. The workpiece is placed inside a sealed inner cover, evacuated or filled with high-purity inert/reducing protective gases (such as a nitrogen-hydrogen mixture), and then heated through the outer cover. The main features of this equipment include:
Utilizing strong convective circulation technology, the temperature difference within the furnace can be kept within ±5℃, ensuring uniform material properties. The entire process is automatically controlled by a computer, which is precise and reliable.
The "double furnace base" design is commonly adopted. When one furnace base is in heating mode, the other can be cooled and loaded, enabling quasi-continuous production. The loading capacity of a single furnace can reach 30 tons, resulting in high production efficiency.
After annealing, the surface is bright and free of oxidation, eliminating the need for the traditional acid washing process after annealing. This fundamentally solves the problems of acid pollution and wastewater treatment.
Application scope
This equipment is applicable to a variety of metal materials and is mainly divided into two categories:
- Non-ferrous metals: Finished bright annealing of copper and copper alloys, aluminum alloys, etc.
- Ferrous metals: Intermediate or finished annealing of coil and wire products such as stainless steel, silicon steel, ordinary carbon steel, alloy steel, etc.
The full automatic control system controls and manages the whole process of heating, heat preservation and cooling of each hood furnace, providing reliable guarantee for the production of users.
Secondary air inlet and saturated steam are used to convert coal into carbon monoxide gas and feed it into a covered furnace for combustion and heating. The proportion of air intake and steam to coal seam is automatically controlled by PLC system, and slag is automatically discharged.
Frequently Asked Questions (FAQ)
What is the primary function of a bright annealing furnace?
The primary function of a bright annealing furnace is to perform non-oxidative heat treatment on metal coils, pipes, and wires. This process eliminates internal stress and improves mechanical properties while keeping the metal surface bright and free of oxide scales.
How does the furnace prevent oxidation during heating?
Oxidation is prevented by isolating oxygen. The workpieces are placed inside a sealed inner cover which is either evacuated or filled with high-purity inert or reducing protective gases, such as a nitrogen-hydrogen mixture.
What is the temperature control accuracy of this equipment?
Thanks to strong convective circulation technology and computer automatic control, the temperature difference inside the furnace is kept within ±5℃, ensuring uniform material properties.
How does the "double furnace base" design improve production efficiency?
The "double furnace base" design allows one furnace base to undergo heating while the other base is cooling and being loaded. This enables quasi-continuous production, with a single furnace loading capacity reaching up to 30 tons.
Why is this annealing furnace considered environmentally friendly?
Because the metal surface remains bright and free of oxidation after the process, it eliminates the need for traditional post-annealing acid washing. This fundamentally solves the environmental issues associated with acid pollution and wastewater treatment.
What kinds of metals can be processed in this furnace?
It is suitable for both non-ferrous metals (like copper, copper alloys, and aluminum alloys) and ferrous metals (such as stainless steel, silicon steel, ordinary carbon steel, and alloy steel products in coil and wire forms).