technical NOTES

7.4 Cost Comparison of VRM Vs. Roller Press for Raw Grinding Application

Roll Press Vs. VRM Techno-Commercial Comparison Raw Mill System

S.N. Parameters Unit RP VRM

1 Grind ability at VRM Meter kWh/Ton 5.0 5.0

2 Type of Mill Process Roller Press VRM

3 Rated Capacity at 15% residue at 90

micron

TPH 600 640

I) Capital Cost Analysis

1.A Cost of Civil Structures

1 Total Concrete (Raw Mill Building) M3 3638 3902

2 Total Cost of Concrete (@ Rs. 17750/

CUM)

Rs in Lacs 646 693

3 Differential Cost on Concrete Rs in Lacs 0 47

1.B Cost OF FAB.+Erection+Steel

1 Fabrication Items Scope Ton 420 850

2 Cost of steel required for site

fabrication + Erection items @ Rs.

80750/ton.

Rs in Lacs 339 686

3 Difference in Steel Cost Rs in Lacs 0 347

1.C Cost of Machinery Erection

1 Equipment Erection (Supply Weight) Ton 1150 1380

2 Cost of Machinery Erection @ Rs.

17500/ton.

Rs in Lacs 201 242

3 Difference in Steel Cost Rs in Lacs 0 40

1.D Total Capital Cost Difference

(A3+B3+C3)

Rs in Lacs 0 434

1.E Net Impact on Capital Cost Rs in Lacs 0 434

II) Operating Cost

2.A Power Cost

1 Specific Power Consumption ( Total

of battery Limit)

kWh/Ton 9.4 11.7

2 Total cost of power per annum @ 600

TPH @ 4 Rs./kwh

Rs in Lacs/

Annum

1563 1946

3 Impact due to SPC (Annually) Rs in Lacs 0 383