Here is a set of dimensioned shop drawings for fabricating the Oregon Kiln - a simple bin kiln for making biochar. The kiln includes a drain hole and plug for draining the quench water.
Oregon Kiln - Forestry Size: 5’ x 4’ x 2’[edit | edit source]
| Oregon Kiln - Bill of Materials for (1) 5’x4’x2’ Kiln | ||
|---|---|---|
| pcs. | Type of Material | Purpose of Material |
| 1 | 5’ x 8’ x 14 ga. sheet metal | Kiln body |
| 2 | 5’ x 2’ x 14 ga. sheet metal | Kiln sides |
| 4 | 5/8” dia. Round, 24” long | Handles |
| 1 | 1⁄4” x 3 1⁄2” Flat Bar, 8” long | Corner braces for lift points |
| 4 | 2” x 2” x 1⁄4” angle, 5’ 6” long | Rim reinforcement |
| 1 | 1 1⁄2” pipe coupling, inside threads | Drain hole |
| 1 | 1 1⁄2” pipe plug | Drain plug |
| 4 | 1⁄2” steel eye hooks and bolts | Lift hooks |
| Estimated Fabrication Cost – labor and materials (2017 prices) | $700 | |
Fabrication Details[edit | edit source]
- Cut 5’ x 8’ sheet as shown and bend. Then weld on side panels for kiln body.
- Or cut panels separately and weld together.
- Drain hole and handle details shown in photograph.
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Handle and drain hole details of the Oregon Kiln.
Ring of Fire Kiln[edit | edit source]
| Ring of Fire Kiln - Bill of Materials for (1) Kiln and Heat Shield | ||
|---|---|---|
| pcs. | Type of Material | Purpose of Material |
| 3 | 44”’ x 78” x 18 ga. sheet metal | Kiln body |
| 1 | 76” x 84” 16 ga. sheet metal | Kiln lid |
| 1 | 18’ x 1 1⁄2” Flat Bar or similar scrap | Kiln lid reinforcement |
| 9 | 1" Drop Forged Light Duty C-Clamp | Kiln body section fasteners |
| 12 | 24” x 44” corrugated steel roofing (salvage, free) | Outer heat shield |
| 36 | Stainless steel bolts | To fasten roofing sections |
| 5 | Bricks | To rest heat shield on |
| Estimated Fabrication Cost – labor and materials (2017 prices) | $800 | |
Fabrication Details[edit | edit source]
- Cut sheet metal pieces and bend flanges for kiln body.
- Cut kiln lid sections to give 4” overlap.
- If desired, use scrap roofing for outer heat shield - drill holes and fasten sheets together with bolts.
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Above left: Use three clamps for each join. Space clamps evenly.
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Above right: The kiln lid is in 2 pieces. Place down inside the kiln on top of hot char and make
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Kiln Body Sections
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Kiln Lid Sections. / Note: Two piece lid. Place lid pieces separately on top of kiln with 4” overlap.
