Electric Kiln for Metal Melting: Difference between revisions
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*Clay graphite crucible - 10kg for $40 - [https://www.ebay.com/p/8-10-Kg-Clay-Graphite-Foundry-Crucible-Melting-Furnace-Refining-Gold-Silver-CU/1248428449?iid=321201746624&chn=ps] | *Clay graphite crucible - 10kg for $40 - [https://www.ebay.com/p/8-10-Kg-Clay-Graphite-Foundry-Crucible-Melting-Furnace-Refining-Gold-Silver-CU/1248428449?iid=321201746624&chn=ps] | ||
*Make your own graphite crucibles - flake graphite - 25 cents/lb for ton quantities. Or 16 lb (1 gal) for $45 [https://sciencekitstore.com/graphite-powder-natural-flake-one-gallon/] | *Make your own graphite crucibles - flake graphite - 25 cents/lb for ton quantities. Or 16 lb (1 gal) for $45 [https://sciencekitstore.com/graphite-powder-natural-flake-one-gallon/] | ||
*Silicon carbide - $1.75/lb - [https://www.ebay.com/itm/SILICON-CARBIDE-60-90-Grit-40-LBS-Rock-Tumblers-1st-step-SandBlasting/122848481022?hash=item1c9a570efe:g:gdAAAOSwUuFWzAAx:sc:USPSPriority!64469!US!-1] | |||
=DIY Clay Graphite Crucibles= | =DIY Clay Graphite Crucibles= | ||
*[[Open Source Metallurgy Crucible]] | |||
*Article - flake graphite + silicon carbide + high fire clay - [https://www.ehow.com/how_7927117_make-clay-graphite-crucible.html] | *Article - flake graphite + silicon carbide + high fire clay - [https://www.ehow.com/how_7927117_make-clay-graphite-crucible.html] | ||
=Limits= | |||
*Nichrome wire melts at 1400C | |||
*Kanthal wire melts at 1500C - good for steel melting? [https://en.wikipedia.org/wiki/Kanthal_(alloy)] | |||
*20kW, 150lb aluminum furnace - [https://www.dykast.com/products/electric-150-lbs-alunimun-capacity-kiln/16222] | |||
*2350F for this one - [https://www.sheffield-pottery.com/Skutt-Kiln-Crucible-Furnace-GM818-3CR-p/skgm8183cr.htm?_vsrefdom=adwords&gclid=EAIaIQobChMI_4Oomf684QIVhsDACh3nkQ_kEAQYBCABEgJYwfD_BwE] | |||
=Industry Standards= | =Industry Standards= | ||
*$150 on Alibaba - [https://www.google.com/search?client=ubuntu&hs=LOy&ei=5D6pXJPBMsPujwSAv5jAAg&q=diy+electric+kiln+for+foundry&oq=diy+electric+kiln+for+foundry&gs_l=psy-ab.3...2272.5182..5386...0.0..0.121.703.3j4......0....1..gws-wiz.......33i22i29i30.OEW-vnEnOP4] | *$150 on Alibaba - [https://www.google.com/search?client=ubuntu&hs=LOy&ei=5D6pXJPBMsPujwSAv5jAAg&q=diy+electric+kiln+for+foundry&oq=diy+electric+kiln+for+foundry&gs_l=psy-ab.3...2272.5182..5386...0.0..0.121.703.3j4......0....1..gws-wiz.......33i22i29i30.OEW-vnEnOP4] | ||
*$300 for 1.5 kW small electric - [https://www.alibaba.com/product-detail/Industrial-Scrap-Steel-Metal-Melting-Furnace_60686033145.html?src=sem_ggl&mark=google_shopping&src=sem_ggl&mark=shopping&cmpgn=1678575544&adgrp=64891157946&locintrst=&locphyscl=9023282&ntwrk=g&device=c&dvcmdl=&position=1o2&pla_adtype=pla&pla_mrctid=130760471&pla_channel=online&pla_prdid=60686033145&pla_country=US&pla_lang=en&pla_group=293946777986&pla_localcode=&gclid=EAIaIQobChMIlKOOm_C84QIVxsDACh3L1AQrEAQYAiABEgKdqPD_BwE#shopping-ads] | |||
*1.6kW 3 kg - $300 - [https://www.aliexpress.com/item/2KG-3KG-Jewel-Gold-Melting-Furnace-Machine-110V-220V-1600W-Kiln-Casting-Refining-Precious-Metals-Melts/32963242544.html?spm=2114.10010108.1000023.6.6f23a0eco3Qar3] | |||
=See Also= | |||
*[[Open Source Metallurgy Construction Set]] | |||
=Useful Links= | |||
* | |||
Latest revision as of 14:46, 14 April 2019
Advantages
- Low cost - essentially the cost of a $10 kiln heating element, and balance for refractory material and steel for case and legs.
Howto
- Connect 2 heating elements by threading around a threaded rod - 3:30
- 1.5 meters long works for 250V - 3:40
- Resistance in his case - 33 Ohm when cold - 3:45
- Fire Bricks - 5:20. Note CEBs work well as fire bricks per results from Hydronic Stove, and results would probably improve if we used perlite. This would be a good product.
BOM
- Kiln Heating Element - $10 - [1]
- Clay graphite crucible - 10kg for $40 - [2]
- Make your own graphite crucibles - flake graphite - 25 cents/lb for ton quantities. Or 16 lb (1 gal) for $45 [3]
- Silicon carbide - $1.75/lb - [4]
DIY Clay Graphite Crucibles
- Open Source Metallurgy Crucible
- Article - flake graphite + silicon carbide + high fire clay - [5]
Limits
- Nichrome wire melts at 1400C
- Kanthal wire melts at 1500C - good for steel melting? [6]
- 20kW, 150lb aluminum furnace - [7]
- 2350F for this one - [8]