KCA fabricates three smelting furnace models for doré bar production: Model 225T (23 kg gold concentrate single charge), Model 430T (45 kg), and Model 800T (84 kg). Capacities calculated at 30% charged by crucible volume, assuming a 2:1 flux ratio and predominantly gold concentrate. Furnaces can be fed multiple times per shift; depending on flux ratio, flux composition, and precious-metal concentrate composition, output can be increased significantly above the nameplate single-charge capacity.
KCA builds three standard sizes of tilting-crucible furnaces for clean, controlled doré pouring. The tilting mechanism allows the operator to pour molten gold directly into the doré mold without removing the crucible — safer, faster, and cleaner than fixed-crucible designs.
KCA provides matched hoods and wet scrubbing systems for each furnace size. Two-stage wet scrubbers handle SO₂, NOₓ, and particulate emissions. Designed to meet permitted emission limits in every U.S. state and applicable foreign jurisdictions.
Model 225T: 23 kg gold concentrate per single charge
Model 430T: 45 kg gold concentrate per single charge
Model 800T: 84 kg gold concentrate per single charge
All capacities assume 30% crucible fill by volume, 2:1 flux:concentrate ratio, predominantly gold concentrate. Higher-density concentrates and optimized flux can substantially increase output per charge.
Refractory-lined steel construction. Firing options: natural gas, propane, or diesel. Integrated exhaust hood and SO₂ / particulate scrubbing. Doré-pour molds and slag-tap arrangements included. Standard tilting mechanism with safety interlocks.
A complete KCA furnace package can include:
• Cascade Mold System and Mold Cart
• Mold Table
• Off-Gas Scrubbing System
• Bag-House
• Dust Collector
• Fans, Ducting and/or Hoods
KCA also fabricates off-gas scrubbing systems to meet the needs of your operation even if you do not have a KCA-fabricated furnace.
KCA guarantees equipment items for the cost of the items only (shipping costs of replacement items included) for a period of 6 months after completion of commissioning or 12 months after shipment, whichever comes first.
Download the KCA No. 225 Tilting Crucible Furnace brochure for full specifications on the Model 225T. Contact KCA for full lineup specifications and pricing.
Selected recent projects where KCA delivered this service. All from our portfolio of 500+ engineering projects.
Whether you’re at scoping stage or ready to break ground, KCA has the lab capacity, engineering bench, and EPCM experience to deliver.
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