The ratio of product weight to ore weight is called the yield of the product. The yield is represented by the Greek letter 读 (read gamma) in units of percentage. For example, if a plant chooses to process 500 tons of ore in a day and night and obtain 30 tons of concentrate, the concentrate yield is calculated as follows:

Υ = (concentrate weight / concentrate weight) × 100%

=(30/50) ×100%=6%

The tailings yield is calculated as follows:

Tailings = [(original weight - concentrate weight) / ore weight] 100%

=[(500-30)/500] ×100%=94%

Or: Tailings = 100% - antimony concentrate

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