High Hydrogen Gas Annealing Furnace for Cold Rolling Strip Steel - China Suppliers & 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: Isolating oxygen from the process. 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.
1. 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.
2. High Production Efficiency
The "double furnace base" design enables quasi-continuous production. When one furnace base is heating, the other can be cooled and loaded. The loading capacity of a single furnace can reach 30 tons.
3. Green & Environmentally Friendly
After annealing, the surface is bright and free of oxidation. This eliminates the need for the traditional post-annealing acid washing process, solving 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
- Copper alloys
- Aluminum alloys
Ferrous Metals
- Stainless steel coil and wire
- Silicon steel
- Ordinary carbon steel
- Alloy steel
Full Automatic Control: The system controls and manages the whole process of heating, heat preservation, and cooling of each hood furnace, providing a reliable guarantee for users.
Energy Conversion & Slag Discharge: 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 a PLC system, and slag is automatically discharged.
Frequently Asked Questions (FAQ)
Q: What is the primary purpose of the bright belt annealing furnace?
A: The primary purpose is to perform non-oxidative heat treatment on metal coils, pipes, and wires. It eliminates internal stress and improves mechanical properties while keeping the metal surface bright and free of oxide scales.
Q: How does the furnace prevent oxidation during heating?
A: The workpiece is sealed inside an inner cover where oxygen is isolated. The chamber is either evacuated or filled with high-purity inert or reducing protective gases, such as a nitrogen-hydrogen mixture, before heating.
Q: What is the temperature uniformity of the furnace?
A: Thanks to strong convective circulation technology, the temperature difference within the furnace can be precisely controlled to remain within ±5℃, ensuring uniform material properties.
Q: How does the "double furnace base" design improve productivity?
A: It allows for quasi-continuous production. While one furnace base is undergoing the heating process, the other base can be cooled and reloaded. The loading capacity of a single furnace can reach up to 30 tons.
Q: Why is this equipment considered environmentally friendly?
A: Because the furnace prevents metal surface oxidation, it completely eliminates the need for the traditional post-annealing acid washing process. This fundamentally resolves the issues of acid pollution and wastewater treatment.
Q: How is the coal-to-gas conversion process controlled?
A: The system utilizes secondary air inlet and saturated steam to convert coal into carbon monoxide gas for combustion heating. The proportion of air intake and steam to the coal seam is automatically managed by a PLC system, which also handles automatic slag discharge.