CONSTRUIR O NO UNA PLANTA CONCENTRADORA Leyes de cabeza: Pagos :

Au (0.136-0.02) x0.925x (177.5-0.75) = $18.965

Ag (3.12-1.00) x0.95x (4.21-0.06) = $8.358

Cu (2.93-1.00) x0.975x20x (0.636-0.06) = $21.677

$49.027 Deducciones :

Cobro base = $35.00

Transporte = 0.12x20 = $2.4

Costo minado = $25.00 $62.4

Perdida =$13.373

Ley de concentrado:

Pagos :

Au (0.964-0.02) x0.925x (177.5-0.75) = $154.338

Ag (22.18-1) x0.950x (4.21-0.06) = $83.502

Cu (20.83-1) x0.975x20x (0.636-0.06) = $222.73

Pb (7.536-1.5) x0.95x20x (0.245-0.047) = $22.707 $483.495

Deducciones :Cobro base = $35.00

Transporte = 0.17x20 = $3.4

$38.4Valor de mina por TCS = 445.09Valor concentrado = Valor concentrado = 445.095/7.9 = $56.341 Menor Costo (Planta)

100Tn/d $7000/Tn = $700 000

S = 700 000x(1+0.08)2 = 816480

n = 2 aos i = 8 % 816480/50000(reserva) = $16.329($56.34-$16.329) = $40.011

Costo Minado = $25

$15.011 (ganancia por tonelada)Produccin Anual = 100Tn/d x 250d/ao = $25000Tn/aoGanancia Anual = 25000x15.011 = $375275/ao

Mtodo de Hoskold:

P = [i/ (1+i) n-1 + i]-1P = [0.06/(1.062-1) + 0.15]-1 = 1.574

Vp = $375275 x 1.574 = $590682.85

Valor presente a 2 aos = $590682.85[1/(1.06)2] = $525705.634

EVALUACIN Y DESARROLLO DE UN PROYECTO Pagos:Pb (8-1.5) x 0.75 x20(0.48-0.047) = $53.48 +Ag (5-1) x 0.95x (7.3-0.06) = $27.51 = $80.99 - Deducciones:Cobro base = $35(Retorno Tn/mina) = $45.99 -Regalas 15% (45.99) = $6.90 = $39.09 -Transporte = $8/Tn x 20 x 15c/Tn x 10 = $3.10 = $35.99 -Costo Minado = $25.00 = $10.99 -Otros = 50%(10.99) =$5.45 = $5.45

Produccin por Ao = 50000Tn/ao x $5.45/Tn

= $272500/ao

Vp = 272500 [(1+0.15)10-1 / 0.15 (1+0.15)10] = 1367614.45

Factor de Recuperacin de Capital = [(1+0.15)10-1 / 0.15 (1+0.15)10]-1 = 0.1992Pagar al Propietario por Ao = $1500000x0.1992 = $298800/ao

= $24900/mes