Valmet achieves a milestone in China with first lime kiln shell and tyre replacement on non-Valmet Lime Kiln system
A large pulp mill in Northern China faced serious reliability issues as cracks started developing on the tyre of its lime kiln. Although the kiln was originally supplied by another manufacturer, Valmet delivered a customized turnkey solution for lime kiln shell and tyre replacement, ensuring reliable long-term operation.
When cracks began to appear on the tyre of its lime kiln, a pulp mill in China turned to Valmet for a solution to reduce the risk of unplanned shutdowns and ensure long-term equipment performance.
After detailed on-site investigations and technical assessments, Valmet proposed a fully customized shell and tyre replacement – a turnkey project covering everything from design and manufacturing to alignment and start-up. The plan was tailored to the kiln’s condition, scheduled shutdown windows, and future operational needs. Although the kiln had been originally supplied by another manufacturer, the customer trusted Valmet’s proven expertise and extensive project experience.
From challenge to achievement in just 56 days
The project covered everything from support roller grinding and pre‑assembly to shell and tyre replacement – each phase executed in strict sequence in the given timeframe, leaving minimal room for adjustments.
Valmet completed the entire project, including detailed engineering to fit modern Valmet design in the existing lime kiln, local manufacturing and delivery of critical components, precise positioning of kiln shell cutting points, and installation and commissioning of key parts such as the girth gear – all within 56 days. Throughout the process, the team consistently upheld Valmet’s principles of safety, quality, and on-time delivery.
The lime kiln was successfully commissioned and brought back into operation as planned, quickly reaching its performance targets for capacity, safety, and reliability. The project earned high recognition from the customer.
“The customer’s well-organized project management and Valmet China’s efficient local support, and above of all, the seamless cooperation between our teams, were the key enablers for the project’s success,” says Palle Hansen, Global Technology Manager, Lime Kilns, Valmet.
Lifecycle services in action
Beyond replacing critical equipment, the project delivered true end-to-end customer value through Valmet’s lifecycle services. The scope covered everything from equipment condition analysis and redesign to a tailored service solution, manufacturing and delivery of critical components, on‑site installation support and commissioning, performance optimization and final project review.
“This project demonstrates the value created through trust and long-term cooperation. More than a technical success, it strengthens my confidence that this first heavy shell and tyre replacement on non-Valmet equipment in China will serve as a proven, replicable and scalable reference for other customers worldwide,” Mr. Hansen concludes.
