Mill Recovery Calculator
Calculate metal recovery percentage from head grade, tailing grade, and throughput for processing plant evaluation.
Inputs
g/t
g/t
g/t
tpd
$/oz
Results
Recovery
94%
Concentration Ratio40
Metal Produced/Day755.5 oz
Metal Produced/Year275,773 oz
Revenue/Day$1,435,530.00
Revenue/Year$523,968,364.00
Concentrate TPD117.5 t
Tailings TPD4,883 t
How to Use This Calculator
- Enter Head Grade (g/t or ppm) — the metal grade fed into the mill.
- Set Tailing Grade and Concentrate Grade from metallurgical testing.
- Enter mill throughput (t/day) and current metal price ($/oz or $/lb).
- Review Recovery (%) — the percentage of metal successfully extracted from the ore.
- Use Metal Produced/Day and Metal Produced/Year for cash flow and revenue projections.
How the result changes with Head Grade
| Head Grade | Recovery |
|---|---|
| 10 | 97% |
| 35 | 99.14% |
| 65 | 99.54% |
| 90 | 99.67% |
What each input means
- Head Grade
- Metal grade of feed ore entering the mill
- Tailing Grade
- Metal grade in the tailings (waste)
- Concentrate Grade
- Metal grade in the concentrate product
- Mill Throughput
- Daily mill feed tonnage
- Metal Price
- Metal price per troy ounce
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersHead Grade = 5, Tailing Grade = 0.3, Concentrate Grade = 200, Mill Throughput = 5000 = 5 input(s) provided
- Calculate RecoveryRecovery94 = 94
- Calculate Concentration RatioConcentration Ratio40 = 40
- Calculate Metal Produced/DayMetal Produced/Day755.5 = 755.5
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