GPK Company, LLC
Gold Processing Kilns
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Kwik Kilns

- (Mini) Kwik Kiln Melting
- (Mini) Kwik Kiln Cupelling
- Compare (Mini) Kwik Kilns
- KK6 Instructions
- KK8 & KK12 Instructions
- Smelting Tips
 

GPK Propane Fired Kwik Kiln®

Our propane fired Kwik Kilns consist of a stainless steel tension-adjustable jacket surrounding an alumina silicate refractory insulation capable of sustaining temperatures up to 2300° Fahrenheit.

We offer the only modular kilns which allow for easy grasping of the crucible for lifting out and pouring, by simply removing the top and/or center section(s) of the kiln.

Each kiln is constructed in a layered or stacked configuration and is less susceptible to cracking from thermal expansion and contraction, as each layer can expand or contract separately. Also: In the hopefully unlikely event of a serious spill or boil-over of the crucible, individual sections of the kiln can be replaced at a fraction of the cost of replacing the entire kiln.  

Smelt ore concentrates, melt pure metals, fire assay, cupel… you can do it all, in minutes, with one of our GPK Kwik Kilns. We now offer 4 sizes to fit your individual needs.

 GPK (Mini) Kwik Kiln®

Features:

  • Reaches 2100°F in 10 to 15 minutes
  • Economical
  • Utilizes inexpensive propane pencil tip torches
  • Portable: Take it with you to the field and melt up to 6 ounces of your fine placer gold in the field
  • Melt pure metals or old jewelry
  • Cupel your lead prill after fire assaying

(Not recommended for smelting ore concentrates, due to the small kiln size and capacity of the crucible, along with the need for a higher flux ratio)

Specs:

Kiln weight: 1 lb

Size: 4” OD x 4” Tall

Propane Fired: Requires (2) pencil tip torches

Crucible Type/Size: Graphite, 1.5” OD x 1.75” Tall

Capacity: Up to 6 oz gold or up to 3 oz silver or copper

3 Models:

  1. GPK Melting Kwik Kiln
  2. Cupelling Kwik Kiln 
  3. Hybrid Kwik Kiln (for either melting or cupelling)

 GPK KK6 (Kwik Kiln® 6”)

Specs:

Kiln weight: 3 lb 12 oz

Size: 6” Diameter x 7” Tall

Chamber: 3” Diameter x 4” Tall

Propane Fired: Requires (2) 6000 BTU torches (Bernzomatic TS4000 or equivalent)

Crucible Type/Size: A0.5 Salamander Clay Graphite (Idea: smaller crucibles can be used for smaller pours)

Capacity (Brass): 1 Kg

2 Models:

  1. Regular KK6 for melting pure metals or smelting ore concentrates
  2. KK6 Cupelling kiln for cupelling a lead prill after doing a fire assay.

 GPK KK8 (Kwik Kiln® 8”)

Specs:

Kiln Weight: 9 lb 6 oz

Size: 8” Diameter x 11” Tall

Chamber: 5” Diameter x 6.5” Tall

Propane Fired: Utilizes Custom Made 160,000 BTU Bi-metal Burner

Pyrometer: Analog Pyrometer up to 2500° F capacity required for heat control

Crucible Type/Size: A2 Salamander Clay Graphite, 150 oz Fused Silica Crucible, 40 gram Clay Crucible (smaller crucibles can be used for smaller pours)

Capacity (Brass): 2.5 Kg

1 Model

 GPK KK12 (Kwik Kiln®12”)

Specs:

Kiln Weight: 18 lbs

Size: 12” Diameter x 12” Tall

Chamber: 6” Diameter x 7.5” Tall

Propane Fired: Utilizes Custom Made 160,000 BTU Bi-metal Burner

Pyrometer: Analog Pyrometer up to 2500° F capacity required for heat control

Crucible Type/Size: A5 Salamander Clay Graphite, 150 oz Fused Silica Crucible, 40 gram Clay Crucible (smaller crucibles can be used for smaller pours)

Capacity (Brass): 6.8 Kg

1 Model