technical NOTES

S. N. Particular VRM Grinding

Semi-Finish

Grinding (RP +

Ball Mill)

Finish Grinding

(RP)

9 Quantum of Civil

Structure Less More Less

10 Stability and Reliability High Moderate Moderate

11 Product Change Over Easy Complex Easy

12 Environment Friendly High Low Moderate

13 Project Duration High (1-2 Months

more) Medium Low

7.7 Cost Comparison of Roller Press v/s VRM for Clinker Grinding Application

RP Vs. VRM TECHNO-COMMERCIAL COMPARISON CEMENT MILL SYSTEM

S.N. Parameters Unit VRM RP

1 Grindability of SLAG / OPC at CCBM

Shaft @ 3000 Blaine

kWh/Ton 37 / 29 37 / 29

2 Type of Mill Process VRM Roller Press

3 Rated Capacity at 100% PSC Grinding TPH 280 270

I) CAPITAL COST ANALYSIS

1.A COST OF CIVIL STRUCTURES

1 Total Concrete (Cement Mill Building +

CM Hoppers)

M3 7636 8096

2 Total Cost of Concrete (@ Rs. 17750/

CUM)

Rs in Lacs 1355 1437

3 Differential Cost on Concrete Rs in Lacs 0 82

1.B COST OF FAB.+ERECTION+STEEL

1 Fabrication Items Scope Tone 515 568

2 Cost of steel required for site fabrication

+ Erection items @ Rs. 80750/ton.

Rs in Lacs 416 459

3 Difference in Steel Cost Rs in Lacs 0 43

1.C COST OF MACHINERY ERECTION

1 Equipment Erection (Supply Weight) Tone 2240 2582

2 Cost of Machinery Erection

@ Rs. 17500/ton.

Rs in Lacs 392 452

3 Difference in Steel Cost Rs in Lacs 0 60

1.D TOTAL CAPITAL COST DIFFERENCE

(A3+B3+C3)

Rs in Lacs 0 184