What is the difference between theory and actual metal recovery? How to calculate?
The metal balance of the ore dressing plant is divided into two types. One is that the actual metal balance is also called commodity balance, and the other is the theoretical metal balance, also called the process balance sheet.
The product balance is calculated based on the raw ore content and the original ore grade and the amount of concentrate obtained and the concentrate grade obtained by the concentrator. The recovery rate is the actual metal recovery rate.
The process balance is because the beneficiation is a continuous production process, and it takes a long time for the ore to select the concentrate. Therefore, in a short period of time, it is impossible to compile the balance of the mineral processing plant, and the process balance can only be prepared according to the grades of the ore, concentrate and tailings. This can be calculated at any time based on the test results. The concentrate recovery calculated from the process balance is the theoretical metal recovery.
Actual recovery rate calculation formula:
ε actual = (concentrate weight × concentrate grade) / (original weight × original ore grade) × 100%
Theoretical recovery formula:
ε theory = {[β(α-σ)]/[α(β-σ)]} ×100%
Comparing the theoretical metal recovery rate with the actual metal recovery rate, it can reveal the cause of metal loss in the beneficiation process, identify the abnormal conditions in the beneficiation work, and the errors in sampling, weighing and various analysis and measurement.
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