The first phase of the 10,000 t/a battery-grade lithium carbonate project has been put into production in July 2022, and the second phase of the 20,000 t/a lithium iron phosphate production line will be implemented simultaneously. Tunnel kiln roasting process is adopted in the project, and the project team actively cooperates with the owner in the design and construction stage to meet the owner's progress requirements. It takes only 8 months from the beginning of the project design to the production of lithium carbonate.