High Hydrogen Gas Bright Belt Annealing Furnace for Steel - China Suppliers & Factory Innovation
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 & 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.
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Uniformity & Precise Temperature Control
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.
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High Production Efficiency
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.
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Green & Environmentally Friendly
After annealing, the surface is bright and free of oxidation, eliminating the need for the traditional acid washing process. 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
✦ Copper & Copper Alloys
✦ Aluminum Alloys
🔷 Ferrous Metals
✦ Stainless Steel
✦ Silicon Steel
✦ Carbon Steel
✦ Alloy Steel
🤖 Full Automatic Control: 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.
🔥 Coal Gas Conversion: 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
Q What is a bright belt annealing furnace and how does it work?
A bright belt annealing furnace is industrial equipment that performs non-oxidative heat treatment on metal coils, pipes, and wires. It works by sealing the workpiece inside an inner cover, then evacuating or filling the chamber with inert/reducing protective gases (such as nitrogen-hydrogen mixtures) to eliminate oxygen contact. The outer cover provides heat while the controlled atmosphere prevents oxidation, resulting in a bright, oxide-free metal surface.
Q What metals are compatible with bright annealing furnace treatment?
The equipment supports a wide range of metals. For non-ferrous metals, it handles copper, copper alloys, and aluminum alloys. For ferrous metals, it is suitable for stainless steel, silicon steel, ordinary carbon steel, and alloy steel — typically for coil and wire products at intermediate or finished annealing stages.
Q How accurate is the temperature control inside the furnace?
The furnace uses strong convective circulation technology to achieve highly uniform heating. The temperature difference within the furnace chamber is maintained within ±5℃. The entire heating, preservation, and cooling process is managed automatically by a computer control system, ensuring precise and repeatable results across every production cycle.
Q Does bright annealing eliminate the need for acid washing?
Yes. Because the protective atmosphere inside the furnace prevents oxidation and decarburization during the heat treatment process, the metal surface remains bright and clean after annealing. This completely removes the need for traditional post-annealing acid washing, eliminating associated acid pollution and industrial wastewater treatment challenges.
Q What is the "double furnace base" design and how does it improve efficiency?
The double furnace base design means the equipment includes two base stations. While one base is actively in the heating phase, the other can simultaneously be in the cooling and loading phase. This staggered workflow enables quasi-continuous production with minimal downtime between cycles. A single furnace loading capacity can reach up to 30 tons, significantly improving overall throughput.
Q How is the coal-to-gas conversion process controlled in the furnace system?
The system uses secondary air inlet and saturated steam to convert coal into carbon monoxide gas, which is then fed into the covered furnace for combustion and heating. The ratio of air intake and steam relative to the coal seam is automatically regulated by a PLC (Programmable Logic Controller) system. Additionally, slag discharge is fully automated, reducing manual intervention and improving operational safety and consistency.