Mineral Processing and Testing

Mineral Processing and Testing

Capabilities

Core cutting, jaw crushing (3×5′′, 4×6′′, 8×10′′), roll crushing, cone crushing, hammer milling, pulverizing, screening, riffle splitting, rotary splitting, and blending for geological and metallurgical testwork.

Bond ball mill work index (BWi), Bond rod mill work index, crushing work index (CWi), abrasion index (Ai), and grindability studies for SAG, ball, and rod mill circuit design and sizing.

Bench-scale rougher, cleaner, scavenger, and locked-cycle flotation for sulfide ores, oxide ores, polymetallic ores, industrial minerals, and coal. Reagent screening, dosage optimization, grade-recovery curves, and variability testing.

Knelson concentrator, spiral concentrators, Wilfley/Deister/Gemeni shaking tables, and heavy-liquid separation for free gold recovery, heavy mineral concentration, and pre-concentration circuits.

Wet high-intensity magnetic separation (WHIMS), rare-earth roll and belt separators, lift-type dry magnetic separators, and electrostatic separation for paramagnetic minerals, iron ore upgrading, and industrial mineral purification.

Bottle roll, column leach (4′′–24′′ diameter), agitated leach, vat/diffusion leach, and diagnostic leach using cyanide, acid, alkaline, and specialty reagent systems. Kinetics determination and scale-up parameters.

Autoclave pressure oxidation (POX) in titanium vessels, bench-scale roasting, tube furnace calcination, and biological oxidation for refractory gold and sulfide pre-treatment.

Thickening, vacuum and pressure filtration, rheology measurement, and dewatering characterization for tailings management and concentrate handling.

Atmospheric and pressure leaching, solvent extraction (SX), electrowinning (EW), precipitation, and crystallization for base metals, critical minerals, and specialty materials.

Cyanide destruction, acid mine drainage neutralization, metals precipitation.

Sub-sieve particle size analysis, brightness/whiteness measurement, bulk density, specific gravity (pycnometer), moisture content, and rheology.

RDi’s 10,000+ square-foot metallurgical testing laboratory in Wheat Ridge, Colorado provides independent, confidential testwork for the global mining and minerals industry. We design every program around your specific orebody, project stage, and economic objectives — delivering the data you need for engineering studies, feasibility reports, and plant design.

Analytical Services

In-house atomic absorption spectrometry (AA), ICP-MS, and fire assay for precious metals. We partner with neighboring accredited laboratories for XRD, XRF, ICP-OES, and automated mineralogy (QEMSCAN, MLA) — giving you access to the full analytical suite under one project manager.

Commodities

  • Gold
  • Silver
  • PGMs
  • Copper
  • Nickel
  • Zinc
  • Lead
  • Rare Earths
  • Lithium
  • Graphite
  • Vanadium
  • Cobalt
  • Titanium
  • Iron Ore
  • Coal
  • Industrial Minerals
  • Tungsten
  • Molybdenum
  • Manganese

Who This is For

  • Junior and mid-tier mining companies needing metallurgical data for NI 43-101, JORC, or S-K 1300 reports
  • Senior producers requiring plant optimization testwork or variability programs
  • EPCs and engineering firms needing independent testwork to support FEED or detailed design
  • Investors and financial institutions requiring due diligence metallurgical review

All Services

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