Plant capacity is often discussed as a single number, but equipment is sized for streams that change through the flowsheet. A 50 TPH mine feed does not mean every pump, screen and separator handles exactly 50 tonnes per hour.
Start with realistic daily feed
Estimate excavated tonnes, haulage cycles, stockpile practice, feeding hours and expected downtime. A nominal 20 TPH plant operated steadily for eight hours may process more useful material than a 50 TPH plant starved for most of the day.
Separate solids rate from slurry flow
Washing and grinding circuits add water. Pumps, pipes and classifiers are affected by volumetric slurry flow, solids concentration and head, not only dry tonnes.
Account for oversize and circulating load
Screens split the feed. Grinding classifiers return material that has not reached the target size. These internal streams can be much larger than the fresh feed and must be included in equipment sizing.
Use a design range
Ore moisture, clay and particle-size distribution change. A practical design defines normal, minimum and peak conditions and identifies which control changes are expected at each condition.
Avoid buying unused capacity
Larger equipment increases capital cost, transport, foundations, starting power and spare-parts requirements. Capacity should support the mine plan and operating reality, not serve as a sales headline.
For an initial review, provide target daily production, planned operating hours, top feed size, water and power conditions, and the expected mining method.