Ammonia Decomposition Furnace for Heat Treatment

In the field of metal heat treatment, a clean and reducing atmosphere is essential for processes such as bright annealing, sintering, and brazing. One economical and efficient way to generate this type of atmosphere is by using an ammonia decomposition furnace. This system produces high-purity hydrogen and nitrogen gas mixture—commonly used as a protective or reducing atmosphere in heat treatment applications.

What is an Ammonia Decomposition Furnace?

An ammonia decomposition furnace, also known as an ammonia cracker, is an industrial device that breaks down anhydrous ammonia (NH₃) into a gas mixture consisting of 75% hydrogen and 25% nitrogen. This is achieved by heating the ammonia over a catalyst, usually at temperatures of around 800–900°C.

Why Use an Ammonia Cracker?

1. Cost-Effective Hydrogen Supply
Purchasing bottled hydrogen can be expensive and logistically complex. By cracking ammonia on-site, businesses can generate a continuous and affordable hydrogen source, significantly reducing operating costs.

2. Clean Reducing Atmosphere
The resulting hydrogen-nitrogen gas is ideal for bright annealing, sintering, and other processes that require a clean, non-oxidizing environment. It helps maintain the metallic luster and surface quality of treated parts.

3. Easy Operation and Maintenance
Modern ammonia decomposition furnaces are designed for simple operation, stable gas output, and low maintenance. They are often equipped with safety systems and flow controllers for consistent gas delivery.

4. Space and Energy Efficient
Compared to gas cylinders or large hydrogen storage systems, ammonia crackers occupy less space and consume less energy, making them ideal for both small and large-scale production lines.

Typical Applications

• Bright annealing of stainless steel and copper parts

• Sintering of powder metallurgy components

• Brazing in a protective atmosphere

• Heat treatment of low carbon steel

Conclusion

For companies seeking a reliable, clean, and cost-effective hydrogen supply, an ammonia decomposition furnace is an excellent choice. It not only ensures high-quality heat treatment results but also brings long-term economic benefits to your production process.