Recently, the calcined dolomite industry in China has witnessed key technological upgrades. Innovative processes such as high-efficiency suspension calcination and energy-saving transformation of double-chamber vertical kilns have been put into large-scale application, thoroughly solving the industry pain points of traditional block calcination including high energy consumption, low resource utilization rate and insufficient product purity. It injects new momentum into the green transformation of upstream and downstream industries such as magnesium smelting, building materials and metallurgy. With the continuous advancement of the dual-carbon strategy, the calcined dolomite industry has officially entered a new stage of high-quality development featuring energy saving, efficiency improvement, intensive resource utilization and low-carbon environmental protection.

Industry technical acceptance data shows that the newly upgraded suspension calcination technology for dolomite has achieved major breakthroughs. Its theoretical heat consumption is reduced to 4600kJ/kg, 16.4% lower than that of traditional energy-saving rotary kiln processes, and the material-magnesium ratio is optimized to 6.150, which greatly improves the raw material utilization efficiency. Jointly developed by domestic heavy industry enterprises and university research teams, this technology abandons the drawbacks of traditional calcination modes, efficiently processes dolomite powder ore resources, solves the long-term industry problems of powder ore waste and limited production capacity, and fills the domestic technical gap in the efficient calcination of dolomite powder ore. Relying on this process, the pilot production has successfully produced N9995 crude magnesium and N99995 high-purity magnesium, with product purity reaching the industry high-end standard.

In terms of equipment implementation and capacity construction, multiple intelligent calcined dolomite production lines have been accelerated nationwide. The 800-ton daily output dolomite calcination rotary kiln project in Hami, Xinjiang, is steadily advancing. As the core supporting project of the regional 35,000-ton magnesium and magnesium alloy production project, this production line will improve the full industrial chain layout of the regional magnesium industry and greatly enhance the large-scale supply capacity of local calcined dolomite. Meanwhile, the energy-saving equipment of double-chamber vertical kilns has completed commissioning and operation. Through intelligent temperature control and optimized closed calcination structure, it effectively reduces flue gas emissions and heat loss, realizing dual improvement of production capacity and environmental benefits.

Industry statistics show that the domestic calcined dolomite market scale reached 8.96 billion yuan in 2025, a year-on-year increase of 5.2%, with a stable compound annual growth rate of 4.7% in the past four years. The market scale is expected to rise to 9.43 billion yuan in 2026. The industrial development has fully transformed from the traditional capacity expansion mode to a dual-driven mode of technological upgrading and application scenario expansion. At present, calcined dolomite is widely used in metallurgical desulfurization, high-end magnesium alloy manufacturing, green building materials, soil improvement and other fields, and shows broad application prospects in emerging tracks such as carbon capture and mineral solidification.

Industry experts stated that the calcined dolomite industry will continue to focus on low-carbon technological iteration in the future, vigorously promote green processes such as electric heating calcination and tail gas recycling, and continuously optimize resource utilization rate and reduce production energy consumption. With the continuous improvement of the localization of high-end equipment and the independence of core technologies, China’s calcined dolomite industry will further consolidate its global market competitiveness and boost the high-quality upgrading of related industries including new materials, metallurgy and energy conservation and environmental protection.