Calculate:
τo = 62.4 x 7.58 x 0.00022 = 1.04 lb/ft2
V* = (0.104/1.94)0.5 = 0.232 ft/s
V* D50
= 0.232 x 0.00105 / 1.121 x 10 -5 = 20.1
ν
Vcr
2.5
=
+ 0.66 = 2.67
ω
log 20.1 - 0.06
Vcr S
= 2.67 x 0.00022 = 0.00059
ω
VS
= 3.02 x 0.00022 / 0.141 = 0.00471
ω
V* 0.232
=
= 1.64
ω
0.141
ω D 50
= 0.141 x 0.00105 / 1.21 x 10 -5 = 12.2
ν
log C t = 5.435 - 0.286 log 12.2 - 0.457 log 1.64 +
(1.799 - 0.409 log 12.2 - 0.314 log 1.64) log (0.00471 - 0.00059)
= 1.96
C t = 101.96 = 91 ppm by weight
Q s = 7820 x 91 x 62.4 x 3600 x 24 /(2000 x 10 6 ) = 1900 tons / day
4.54
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