【Ten Years of Rapid Development in Chemical Processing Equipment】1318-2023: The First Continuous Rotary Furnace Capable of Producing 10,000 Tons per Year of Lithium Battery Anode Materials
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The first domestic continuous rotary furnace capable of producing 10,000 tons per year of lithium battery anode materials has been delivered. This furnace was independently developed by Keyuan New Materials Equipment of Xianyang Ceramic Institute, which is part of China National Building Materials Group. Its completion marks a significant breakthrough in the production of lithium battery materials in China. The negative electrode material for power batteries is the key factor determining fast-charging performance; the sintering process of the electrode material is crucial for overcoming the challenges associated with fast charging, and it represents an important step in improving the electrical conductivity of battery materials. The manufacturing of 10,000-ton lithium battery anode material furnaces is a highly complex and technology-intensive process that requires rigorous design, precise manufacturing, and systematic quality control. The furnace used for producing lithium battery anode materials on a scale of 10,000 tons, developed by Xianyang Ceramic Institute, has a diameter of over 2 meters and a length of over 36 meters. Compared to the existing mature equipment, its diameter is 30% larger and its length is 40% greater. The successful operation of the rotary furnace has improved the production efficiency of lithium battery anode materials, reduced energy consumption by 15% during the production process, and further helped to cut costs. It provides a stable supply of lithium battery materials for new energy vehicles, offering strong support for the healthy development of the new energy vehicle industry chain.
In terms of sealing, the invented dynamic-sealing technology ensures complete isolation of the material throughout the process, thereby guaranteeing no leakage points in the sintering process. As for the heating method, a new and unique dynamic heating technique is used instead of the traditional static box sintering method, which helps to overcome problems such as over-sintering and under-sintering that occur during static heating of the material. In terms of structural design, the inner container is made from metal with a mirror finish or through precision machining, which reduces contact between the material and magnetic substances inside the furnace during the sintering process. This approach overcomes the limitations associated with current sintering furnaces in the field of new energy anode materials, enabling higher production capacities of tens of thousands of tons. By overcoming key technologies and processes related to sealing, heating methods, and preventing sticking to the furnace walls, it becomes possible to achieve more efficient and continuous production of lithium battery anode materials