Sustainable Mining and Metallurgy

Taking the design of lithium extraction project from lepidolite with an annual output of 10000 tons of batterygrade lithium carbonate as an example, the material balance and heat balance of the roasting process of lepidolite sulfate rotary kiln were calculated by METCAL software, and the main energy consumption was analyzed. The simulation results were compared with the actual operation data of a similar project. The results show that the simulation results are basically consistent with the actual data. The heat loss of the roasting system is mainly the exhaust heat loss of the drying kiln and the heat loss of the rotary kiln, which account for 48.3% of the total heat and should be paid attention to. In the energysaving design, equipment insulation, clinker waste heat utilization and kiln tail gas waste heat utilization should be strengthened to reduce the energy consumption and cost of production.