1. The rotary kiln has a stable output, so it is suitable for large,medium-sized and small active lime production lines.
2. The rotary kiln is open-type calcination process. Its structure is very simple. The quality of ﬁnal lime is stable and with low rate of light-burnt and over-burnt. The rotary kiln can make the high quality lime with higher activity for steel making industry. Under the same conditions, the activity of lime produced by rotary kiln is higher than that of gas-ﬁred vertical kiln, with an average 30mL higher, and the activity is normally 340~380mL, even up to 400mL.
3. The rotary kiln can directly feed into fine limestone with sizes of 10~50mm. Normally, 0~30mm ﬁne limestone produced accounts for 30-40% of the total quantity. The construction of the rotary kiln production line can not only make full use of high-quality limestone mine resources, but also can meet the sustainable development policy of the lime industry.
4. The ﬁnal lime product has stable quality is the most advantage by rotary kiln process. The active lime production project is suitable for the comprehensive development of mine resources and has a good development prospect.
|Main Equipment||Main supporting equipment models and technical and economic indicators|
|Calcination Temperature /℃||1100±50|
|Energy Consumption Index /（kCal/kg）||1200±100||≤1150||≤1100|
|Power Consumption Index /（kW·h/t)||40±5|
|Light and Over burnt Rate /%||≤5|
|Lime Activity /ml||≥340（depends on the composition of limestone）|
|Lime Discharging Temperature /℃||Ambient Temperature +60|
|Limestone Feeding Size /mm||10~20/20~40|
|Emission Concentration /（mg/Nm3）||≤10|
|Annual Working Day / Days||≥340|
|Overhaul Cycle / Year||1~3|
|Labor / Shift||2~3|
|Applicable fuel||Coal powder, Coke oven gas, Semi-coke furnace gas, Converter gas, Blast furnace gas, Calcium carbide furnace gas, Natural gas, Diesel oil, Heavy oil, Liqueﬁed petroleum gas, biomass fuel etc.|