Application of LM Vertical Coal Mill in High-Temperature Calcination of Dolomite Rotary Kiln for Magnesium Smelting

As the "green structural material of the 21st century", the magnesium industry has entered a new development cycle featuring "policy support, technological empowerment and demand expansion", driven by the lightweight trend and the dual carbon goals. With its outstanding properties such as light weight, high strength and corrosion resistance, metallic magnesium is widely used in high-end fields including aerospace, electronic communications and automotive manufacturing, serving as a key material supporting the growth of emerging industries.

High-temperature calcination in dolomite rotary kilns is the core process of magnesium smelting. The purity and reactivity of calcined dolomite directly determine the subsequent reduction efficiency. This process requires stable and efficient fuel support, making the quality of high-grade pulverized coal a critical factor restricting production capacity, energy consumption and environmental compliance of the production line.

The enterprise cooperating this time is highly representative of the industry. Building on dolomite mining and processing, it has vertically extended its business to metal magnesium smelting and magnesium product manufacturing, forming a fully integrated industrial layout covering the entire production chain.

Calcined dolomite production in rotary kilns is a core process in the Pidgeon process for magnesium smelting, which imposes particularly stringent requirements on the stability of fuel quality and the continuity of fuel supply. Ultimately, the enterprise adopted an integrated solution centered on LIMING Heavy Industry’s LM Vertical Roller Mill. From production line design to main equipment supply, the entire project was customized in accordance with actual on-site working conditions.

Material Processed: Coal

Application: Fuel for rotary kilns in metallic magnesium smelting

Equipment : Liming Heavy Industry LM Vertical Roller Mill

Liming's technical team worked closely with the client to integrate the LM vertical mill control system into the plant's centralized control center, achieving seamless communication and data exchange throughout the entire process. This has upgraded production management and control from an "experience-driven" model to a centralized, precise and intelligent model.

Liming Heavy Industry’s LM Vertical Roller Mill integrates crushing, grinding, drying, classifying and conveying in one unit. Its combined drying and pulverizing design enables a one-step milling process with simultaneous grinding and drying.

This large-scale milling equipment incorporates reliable advanced technologies. Equipped with hydraulic roller devices and automated electrical control systems, it ensures the entire milling process is safe, eco-friendly, intelligent, convenient, energy-saving and highly efficient.

Five-level Explosion-proof System: The system integrates online CO-O₂ monitoring and nitrogen inerting protection, enabling real-time and precise control of oxygen content inside the mill. It eliminates hidden dangers of combustion and explosion at the source, building a solid safety barrier for the stable fuel supply to rotary kilns.

Intelligent Emergency Response Mechanism: Equipped with a dust concentration early warning and automatic spray explosion suppression system, it can trigger protective measures within milliseconds, forming a closed-loop management of "monitoring–early warning–disposal".

Fully Enclosed Negative Pressure Operation: Dust emission concentration is stably lower than 10mg/m³, helping the project achieve ultra-low emissions.

Empowering smelting upgrading with technology, and consolidating the energy foundation with robust equipment. Liming Heavy Industry’s LM Vertical Roller Mill delivers sustained and reliable energy support for the rotary kiln calcination process through its comprehensive value of cost reduction and efficiency improvement.

From robust single-machine empowerment to coordinated upgrading of the entire process, and from compliant production to green intelligent manufacturing, Liming Heavy Industry has always kept pace with the industry, working hand in hand with enterprises to draw a grand blueprint for green intelligent manufacturing and high-quality development.