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Jiangsu Jufeng's Pidgeon Process: A Three-Step Method for High-Purity Magnesium Ingot Production

Jiangsu Jufeng Thermal Technology Co., Ltd. utilizes the proven Pidgeon Process (also known as the Three-Step Method) for magnesium production, involving dolomite calcination, vacuum thermal reduction, and magnesium refining to deliver high-quality magnesium ingots. 

Our core magnesium production is based on this widely adopted and reliable process. The method is systematically structured into three key stages: dolomite calcination, pellet reduction, and crude magnesium refining. This efficient and controllable workflow is why the industry recognizes it as the "Three-Step" Magnesium Smelting Process.

 

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Our complete production flow is illustrated in the diagram below, with each step under precise control from raw material to finished product:

01
Raw Material Preparation & Calcination
The process begins with the high-temperature calcination of dolomite, converting it into more reactive calcined dolomite (a mixture of calcium oxide and magnesium oxide), preparing it for the subsequent reduction reaction.
02
Pelletizing & Vacuum Thermal Reduction (Core Reaction Stage)
The calcined dolomite is precisely mixed with a reducing agent (ferrosilicon) and a catalyst (fluorite) in specific proportions. This mixture is then ground into powder and pressed into compacted pellets. These pellets are loaded into specially made heat-resistant alloy steel retorts. Under high temperatures of 1150°C – 1200°C and a high vacuum of approximately 10 Pa – 20 Pa, the reduction of magnesium oxide occurs, producing magnesium vapor.
03
Condensation & Refining
The magnesium vapor travels to the water-cooled crystallization sleeve at the front of the retort, where it rapidly condenses into solid crystalline magnesium (crude magnesium). Finally, this crude magnesium undergoes flux refining to remove impurities and is then cast into high-purity magnesium ingots, ready for use in various industries.

Process Advantages Summary:

01
Proven & Reliable Technology
The Pidgeon Process offers a clear, stable, and well-established production route.
02
High Product Purity
The reaction occurs in a high-temperature vacuum, minimizing oxidation and yielding high-quality crystalline magnesium.
03
Strong Process Control
The "Three-Step" structure allows for effective quality and energy consumption management at each stage.