NEW LIME CALCINATIONS PLANT:

Introduction:

          Lime is considered as the most important raw material in BOF steel making next to hot metal only. The role of lime is to fix acidic compounds of undesirable metals and metalloids from metallic bath to slag and to protect the basic lining of the vessels from attack of acidic compounds.

          NLCP after modernization ensures consistent quality of lime to BOF shop. It is the first of its kind in India steel plants. The kiln is controlled by PLC bar. A single operator can run the entire plant from the main controlled room with the help of control panel. There are 3 kilns of 300 TPD each (so total 900 TPD). Klin is constructed with two concentric cylinders and the annular space between the cylinders is used for the calcination of limestone. It is fired with coke oven gas through 10 combustion chambers. Two levels are there each having 5 combustion chambers.

1.     Limestone(25-55mm) 1530 tpd

2.     CO gas 7600 Nm³/hr.

3.     Electrical energy 1765 kW.

4.     Air 51000 Nm³/hr.

5.     Nitrogen 95 Nm³/hr.

6.     Compressed air 140 Nm³/hr.

7.     Water 3.52 Nm³/hr.

OUTPUTS FROM THE NLCP:

                  

1.     Lime (20-50) 765 tpd.

2.     Lime (0-20) 135 tpd.

3.     Limestone (-25) 150 tpd.

4.     Limestone (+50) 75 tpd.

5.     Lime and limestone dust (0-1) 14 tpd.

6.     Exhaust gases 73500 Nm³/hr.

BATTREY DIMENSION:

         

          Length 440 cm, breadth 9.0 m, height 54 m.

KILN SIZE:

         

          Height=531.5 m, O.D=6.8 m, structure=400 tonnes

          Refractory lining=700 tonnes, limestone holding capacity=765 tonnes.