It is repaired that the damaged firebrick lining of lime kiln in Second Sintering Plant by using the technology of spraying in 1993.

Heat balance and energy saving technique improvement on lime shaft kiln;

According to the production technological requirement of the lime shaft kiln,an automatic control system based on Siemens S7-300 PLC was designed.

The old control system of gas combustion vertical lime kiln isn't perfect and influence the regular production.

This paper introduces the features of lime's activity, simulates the lime kiln of shaft furnace by using 2D mathematical model, discusses on the simulation results, and indicates that the unreasonable blast-cap structure is the main reason of causing the low activity of the lime.