A 2025 study recovered 91.76% WO3 at 61.03% grade from +425 µm scheelite. Here are the three size fractions tested, the reagent regime used, and what a plant needs to run it.

Heated flotation is mandatory for fluorite-type scheelite, optional for quartz-type, and hard for calcite-type. Parameters and the tests that settle the choice.

Sodium sulfide changes the surface of oxidized silver minerals so xanthate can collect them. Reagent window, pH control, and the tests that size the circuit.

Three destruction routes, three different reagent bills. Tonnage, cyanide speciation and reagent supply decide which one a gold plant should build.

Cyanide tailings go to a filter press or to a pond. Water balance, site conditions and closure obligations decide which route a silver plant builds.

Heap leaching and agitation leaching split low-grade silver ore by grade, clay content and leach kinetics. Five test criteria that settle the route choice.

Silver in a lead-zinc ore rides galena into the lead concentrate. Where the split is set, the dose behind it, and what the zinc concentrate's share is worth.

Cyanide demand, leach time, solution recovery, washing and testwork decide what a silver leach plant returns. Five design points and the numbers behind each.