Steel mill slag, desulfurization limestone from thermal power plants, and industrial coal powder preparation all fall under high-capacity continuous production scenarios. Traditional configurations using multiple Raymond mills in parallel are dispersed, require a large footprint, and entail high investment in supporting drying equipment, resulting in persistently high overall operating costs. SBM’s LM Series Vertical Grinding Mills are specifically designed for large-scale powder processing projects, integrating five key functions—crushing, drying, grinding, classification, and conveying—into a single unit.
The LM vertical mill series includes multiple models: the N Series for slag, the M Series for pulverized coal, and the K Series for general-purpose ore. Production capacities range from 10 to 340 metric tons per hour. The largest model, the LM370N, can process up to 110 metric tons of slag per hour, making it suitable for slag microfine powder production facilities with an annual output of over 500,000 metric tons. The equipment features a built-in hot-air drying channel, enabling direct processing of wet slag with moisture content below 15% and damp raw limestone. This eliminates the need for a separate drying kiln, simplifies the entire process flow, and reduces the plant footprint to just 50% of that required by a ball mill system. It also supports open-air installation, significantly reducing civil engineering costs.
The equipment employs the principle of material-bed grinding, where the material forms a stable bed between the grinding disc and rollers, resulting in high grinding efficiency and comprehensive energy savings of 30%–40% compared to traditional ball mills. The grinding rollers and disc are made of high-chromium wear-resistant alloy, optimized for impact resistance against iron impurities in slag, ensuring a longer service life for wear parts. The entire unit is equipped with a fully automated central control system that supports both local and remote control modes. It monitors the main unit’s current, powder fineness, and drying temperature in real time, reducing the need for on-site personnel; a single large-scale production line requires only 2–3 operators.
The purity of the finished product is controllable, effectively reducing the iron content in the powder. The desulfurization powder derived from limestone exhibits stable reactivity, and the specific surface area of the slag micropowder remains stable at ≥420 m²/kg, meeting national standards for cement admixtures. The equipment operates under negative pressure throughout the process, resulting in minimal vibration, low noise, and no dust leakage, making it suitable for environmental protection production lines at steel mills and power plants. Numerous domestic projects—including those with an annual production capacity of 400,000 metric tons of limestone desulfurization powder and 600,000 metric tons of microsilica—have selected the LM Vertical Mill and achieved long-term, stable operation.
Large-scale vertical mill projects require highly specialized expertise in preliminary site planning, hot-air systems, and iron removal solutions; selecting equipment on your own may lead to issues such as insufficient drying or production capacity falling short of expectations. If you are planning large-scale processing of slag, desulfurization limestone, or pulverized coal, please leave a message via the Business Messenger on this page specifying the moisture content of your raw materials and your planned annual production capacity. Shibang engineers will provide a complete, customized solution covering the hot-air system and plant layout.
Summary: For large-scale solid waste, power plant desulfurization, and pulverized coal preparation projects, we recommend the Shibang LM Vertical Mill. Its integrated process simplifies the production line. Leave a message via the Online Business Portal with your raw material specifications to obtain a complete solution for a large-scale production line.
