Cost Estimation

Cost Per Ton in Mineral Powder Processing: How to Build a Defensible Quote

A bucket by bucket breakdown of cost per ton for ground minerals and where estimates quietly lose money.

Cost per ton in mineral powder processing splits into five buckets: raw material and freight in, energy, labor, packaging, and plant overhead. For a mid volume ground mineral running 30 to 50 t/h, a defensible landed cost often lands between 60 and 180 dollars per ton depending on fineness and moisture spec. Build the quote bottom up, one bucket at a time, then add margin last. The fastest way to lose money is quoting a blended plant average when the actual order sits at a finer cut or a smaller bag, both of which move cost more than buyers expect.

Energy is usually the largest conversion cost, 30 to 55 percent of value added. Two loads dominate: milling and drying. At 27 kWh per ton and 0.09 dollars per kWh, grinding alone costs 2.43 dollars per ton. Every step finer roughly follows an inverse square root law, so moving from 150 to 45 micron P80 can nearly double specific energy and push grinding past 5 dollars per ton. Drying gets worse as feed moisture climbs, and the Dryer Energy Cost calculator shows that removing an extra 3 points of moisture on 10 t/h can add 1 to 2 dollars per ton in gas.

Packaging is where quotes quietly bleed. A 25 kg valve bag runs 0.28 to 0.45 dollars each, and at 40 bags per ton that is 11.20 to 18 dollars per ton for the bag alone, before labor and the pallet. Move the same product to a one ton bulk bag at 4 to 7 dollars and packaging drops below 7 dollars per ton. The Packaging Cost Per Ton calculator makes this swing explicit. Stretch wrap, pallets at 8 to 14 dollars each, and slip sheets add another 2 to 4 dollars per ton that estimators routinely leave off the sheet.

Labor cost per ton equals loaded crew cost per hour divided by tons per hour, so it lives or dies on line speed. A four person bagging crew at 220 dollars per hour loaded, running the Bagging Line Capacity of 1,600 bags per hour or 40 t/h, costs 5.50 dollars per ton. Drop to 900 bags per hour on a jam prone applicator and the same crew now costs 9.78 dollars per ton. Machine time carries fixed depreciation and maintenance too: a mill at 400 dollars per hour of ownership over 45 t/h adds 8.89 dollars per ton whether it runs full or idles.

Yield loss is a cost multiplier, not a line item. If first pass yield is 92 percent, every ton shipped actually consumed 1.087 tons of feed, so all upstream material and energy costs rise by 8.7 percent. Off spec fines that cannot be sold, tracked through the Screening Loss and Particle Size Yield calculators, may recover only 20 to 40 percent of value as a downgraded product. On a 120 dollar per ton product, moving yield from 92 to 96 percent saves roughly 5 dollars per ton in feed and conversion, often the cheapest margin on the table.

Two hidden costs finish the model. Freight on low value minerals can rival conversion cost: at 0.11 dollars per ton mile, 300 miles adds 33 dollars per ton, which is why plant location beats efficiency for bulk grades. Moisture giveaway is subtler. Shipping product at 0.8 percent moisture against a 1.5 percent spec means you paid to evaporate water the customer would have accepted and you ship solids you could have sold as water weight. The Moisture Content Adjustment calculator quantifies both the drying overspend and the tonnage given away on every load.

Assemble the quote as material plus energy plus labor plus packaging plus overhead, divide by yield, then apply margin of 12 to 25 percent by grade. Common estimating errors: using nameplate throughput instead of the 65 to 80 percent you actually average, costing on dry tons while selling wet tons or the reverse, and pricing the standard bag when the order calls for a small pack. Rerun the Packaging Cost Per Ton and Bagging Line Capacity numbers for the specific SKU quoted, not the plant average, and the quote will hold up under a customer audit.

Published 2026-07-02.