please show all work, thank you PROBLEMS95 Surface 10 Overburdern Outcrop ropert

Question

please show all work, thank you

PROBLEMS95 Surface 10 Overburdern Outcrop roperty line FIGURE 3.16. Plan view and cross section AA' of coal deposit in Prablem 3.3. Other cross sections are similar to the one shown. Coal Overburden Hole Thickness Thickness Analysis Area of Influence (rt) 3.1 2.8 3.2 3.0 3.1 2.9 3.2 3.2 2.8 3.1 3.0 133 175 283 182 327 156 298 417 149 275 1.56 1.6 1.4 1.7 0.9 1.2 1.5 1.34 2.32 1.70 2.21 1.73 1.20 2.38 1.98 2.61 10 1.3 3.4) Calculate the cutof grade of an iron deposit, given the following: Iron ore price: $84/long ton ($82.68/tonne), 100% Fe Total production cost: $25/long ton ($24.61/tonne) Recovery: 95% 1 long ton 2240 lb (1.016 tonne) 3.5 )An underground mine is producing zinc ore at S35/ton ($38.59/tonne), which includes all of its mining and processing costs. If it nets a selling price of $0.60/lb ($1.32/kg) of zinc in the concentrate, what is the cutoff grade of the mine (in % zinc) if none of the variables change and recovery of zinc is 88%?

Explanation / Answer

In mineral resource industry , cutoff grade is the resource estimation of the mineral deposit.

If the grade is below the profit and it is present in the ore deposit this is known as mine cutoff grade.

Mineral deposit which is profitable to work is called ore deposit.

Ans: 3.4 Iron ore price/total production cost=82.68/24.61/tonne

3.3596/tonne cutoff grade of iron deposit

Ans:3.5 cutoff grade of zinc mine in %

production cost/current selling price 38.59/tonne/1.32/kg

=29

=1.31   

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