Quicklime Production Process

The original quicklime production process involved layering limestone with fuel (wood) and igniting it for one week to obtain quicklime. Modern methods utilize mechanized and semi-mechanized vertical kilns, rotary kilns, and fluidized bed furnaces. The calcination time has been correspondingly shortened; lime production using a rotary kiln takes only 2-4 hours, increasing production efficiency by more than five times compared to vertical kilns. In recent years, energy-efficient processes and equipment have emerged, such as cross-flow, double-slope, and oil-fired annular vertical kilns, as well as short rotary kilns with preheaters. Fuels have also been expanded to include coal, coke, heavy oil, and liquefied petroleum gas.