Guangxi Botare Yuantrove Paper installs lime kiln plant for new pulp mill
A new lime kiln supplied by ANDRITZ supports energy-efficient and low-emission operation at a greenfield pulp mill in China.
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ANDRITZ lime kiln technology is designed to achieve low energy consumption, low emissions, and excellent availability, thereby ensuring optimal operation costs.
Guangxi Botare Yuantrove Paper, a pulp and tissue manufacturer operating under the Zhihu Group, is developing a new pulp mill at the Yugui Industrial Park in Guigang City, China. As part of the greenfield project, the company needed a lime reburning solution that could support stable pulp production while meeting strict targets for energy efficiency, emissions control and long-term operational reliability.
In chemical pulping, the lime kiln is a critical unit within the recausticizing process, directly influencing chemical recovery efficiency, fuel consumption and atmospheric emissions. For the new mill, Guangxi Botare Yuantrove Paper sought a technically proven solution capable of delivering high availability and low operating costs from start-up onward.
Project objectives: Efficiency, emissions control and availability
The main objectives of the lime kiln project were to ensure reliable production of reburnt lime, reduce heat consumption and minimise emissions such as total reduced sulfur (TRS). The system also needed to integrate effectively with the mill’s overall chemical recovery loop, including efficient lime mud dewatering and washing to support stable kiln operation.
Given these requirements, the company prioritised a supplier with experience in large-scale pulp mill projects and advanced kiln technology.
Selected solution: ANDRITZ lime kiln technology
Guangxi Botare Yuantrove Paper awarded ANDRITZ a contract to supply a complete lime kiln plant for the new mill. The kiln will have a production capacity of 380 tonnes per day of burnt lime and is designed to support low energy consumption, low emissions and high availability.
According to Zeng Xingfeng, Chief Engineer at Guangxi Botare Yuantrove Paper, the selected concept met all operational requirements and aligned with the company’s expectations for long-term performance and technical reliability.
The scope of supply also includes an ANDRITZ LimeDry lime mud filter. This system is designed to achieve high dry solids content with efficient washing of lime mud, supporting stable kiln operation while reducing heat demand. Improved washing efficiency also contributes to lower TRS emissions in the lime kiln flue gases.
Deployment timeline and support
The lime kiln plant is part of ANDRITZ’s order intake for the first quarter of 2025. Start-up of the new pulp mill, including the lime kiln system, is scheduled for the second quarter of 2026.
ANDRITZ will support the project through engineering, supply and implementation, drawing on its experience in delivering lime kiln systems for pulp mills worldwide.
Expected operational impact
By integrating a modern lime kiln with efficient lime mud dewatering, the new pulp mill is positioned to achieve stable chemical recovery with reduced fuel consumption and controlled emissions. The selected configuration supports optimized operating costs while contributing to environmentally responsible pulp production.
For Guangxi Botare Yuantrove Paper, the lime kiln plant forms a key foundation for reliable and efficient operation of its new mill, aligned with current environmental and performance expectations in the pulp and paper industry.
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