Conversion roasting: Spodumene concentrate is manually sent from the concentrate warehouse to the bucket elevator to the concentrate warehouse, and then the lithium carbonate kiln tail is added to the disk feeder and the spiral feeder. The concentrate is dried by high temperature gas in the preheating section of the kiln tail. The concentrate is then transformed into a crystalline calcination at a temperature of about 1200℃. Density 3150kg/m3) is converted into β-type spodumene (tetragonal system, density 2400kg/m3, that is, baking material), the conversion rate is about 98%.