Smart Manufacturing, Exceptional Precision: Liyuanheng's LYH1750 Raymond Mill Installed and Commissioned for a Sichuan Calcite Project

The land of Bashu is rich in natural beauty and mineral resources. Across this vibrant region of southwest China, calcite serves as the strategic core raw material for producing ground calcium carbonate, driving multi-billion-dollar industry chains in plastics, coatings, and papermaking. Nantong Liyuanheng Machinery Co., Ltd. has recently completed the high-standard installation and commissioning of its LYH1750 Raymond mill at a large-scale non-metallic mineral powder processing facility in Sichuan. The equipment is now set to empower regional industrial upgrading with outstanding performance, marking a new chapter in the deep integration of high-end powder processing equipment with southwest China's mineral resources.

Heavy-Duty Equipment Built on Manufacturing Craftsmanship

Nantong Liyuanheng is based in the Haian National Economic and Technological Development Zone, at the heart of the Yangtze River Delta economic circle. It is a national high-tech enterprise integrating the R&D, manufacturing, and EPC engineering of ultra-fine powder grinding equipment. The company has long focused on energy-efficient and ultra-fine grinding technology, drawing on advanced German manufacturing processes and precision engineering expertise from Taiwan, while maintaining close industry-university-research collaboration with several leading domestic institutions.

To date, Liyuanheng has obtained more than 60 national patents, including an invention patent for its independently developed "Raymond mill with a pressurized limiting device for the grinding roller," underscoring the company's strong technical capabilities in intelligent grinding.

Robust Specifications, Outstanding Performance

The LYH1750 Raymond mill is Liyuanheng's flagship model, purpose-built for large-scale, single-product, high-output production lines. The equipment features five grinding rollers, a grinding ring with an internal diameter of Φ1750mm, a maximum feed size of 45mm, and a finished fineness adjustable between 80 and 325 mesh. The main unit is fitted with a deeply customized Model 175 dedicated reducer, whose flange, shaft diameter, and keyway interfaces are fully compatible with the mill base, allowing for integrated, ready-to-install setup. The gears are made from medium-carbon alloy steel forgings with surface hardening, reaching a tooth-surface hardness of HRC58-62 and improving resistance to pitting and wear by more than 50%.

The patented cyclone air classification technology brings separation efficiency and product uniformity up to internationally advanced standards. As a core piece of equipment dedicated to calcite processing, the LYH1750 is precisely matched to calcite's physical properties — a Mohs hardness of no more than 3 and moisture content below 6% — providing a solid foundation for the large-scale production of high-quality ground calcium carbonate powder.

On the Ground in Sichuan: Professional Expertise in Action

For this Sichuan project, the installation and commissioning of the LYH1750 Raymond mill was led throughout by Liyuanheng's professional technical team, in strict compliance with China's national standard GB 50276-1998, "Code for Construction and Acceptance of Crushing and Grinding Equipment Installation Engineering." From foundation work to equipment lifting, and from coaxiality calibration to pipeline sealing, every step was controlled with millimeter-level precision. Guided by a rigorous and scientific approach to service, Liyuanheng's team provides comprehensive, full-lifecycle technical support, from equipment selection through installation, commissioning, operator training, and ongoing maintenance.

During the no-load trial run, the team followed strict protocol, securing the grinding roller assembly with steel wire rope to prevent impact contact between the roller and ring, and running the main unit idle for at least one hour to fully verify smooth operation and noise levels. During the load trial run, the equipment operated continuously with calcite feed for no less than eight hours, with maximum bearing temperature strictly controlled below 70°C and temperature rise held under 35°C, while the sealing integrity of all pipeline connections was repeatedly verified with no air leaks. The entire commissioning process was governed by data and by regulatory standards, and the equipment passed acceptance on the first attempt, with all performance indicators meeting or exceeding design specifications — a testament to the exceptional professionalism and craftsmanship of Liyuanheng's team.

Deepening Service, Building the Future Together

From the banks of the Yangtze River to the heart of Sichuan, Nantong Liyuanheng continues to empower the high-quality development of China's powder processing industry through outstanding equipment and professional service. The company remains guided by its business philosophy of "quality first, reputation above all," supported by a rigorous quality control system and a responsive spare-parts supply network. Choosing Liyuanheng's LYH1750 Raymond mill for calcite processing means choosing not only an efficient, energy-saving grinding solution, but also a trustworthy, long-term strategic partner. Looking ahead, Liyuanheng will continue to drive innovation and put customer needs first, helping advance the non-metallic mineral processing industry — across southwest China and beyond — toward greater intelligence and scale.