Leaching Is

question 35

Multiple Choice

Leaching is

• A) melting an ore and separating it from the lower density gangue.
• B) selectively dissolving a metal in solution to separate it from its ore.
• C) the process of heating an ore to drive off volatile compounds.
• D) heating an ore, in the presence of argon or another substance, in order to purify the ore and obtain the liquid metal.
• E) heating an ore, in the presence of argon or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds.

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Definitions:

Accounting Rate of Return

A financial ratio that measures the profitability of an investment by dividing the average annual profit by the initial investment cost.

Weighted Average Cost of Capital

The average rate of return a company is expected to pay its security holders to finance its assets, weighted by the type of capital.

Modified Internal Rate of Return (MIRR)

A financial metric that accounts for the cost of capital and reinvestment of cash flows to provide a better measure of a project's profitability than the traditional IRR.

Net Present Value (NPV)

The difference between the present value of cash inflows and the present value of cash outflows over a period of time.