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Home Built Smelting Furnace - The Shell

The use of my Myford ML7 Lathe and the need for Aluminium blocks to machine to aid me in building my CNC machine & other projects lead me down the path of looking for designs to smelt my own aluminium casting blocks. The design's I found online seemed to be flimsy and not up to the amount of smelting I was going to be doing with it, so I thought I would design my own heavy duty home built smelting furnace from scratch as a project as I needed the MIG welding practice anyway. If this design works well I will create a larger smelting furnace.

I first created a base by welding together some 1mm thick 30mm x 100mm metal box section.

Home Built Furnace base

Then I created what I call a Coffer Dam to hold the refractory insulation & fire cement. Which will surround the home built smelting furnace.

Home Built Furnace shell

This is the two components joined together prior to MIG Welding.

Home Built Furnace

 Once these two components are welded together, I will then construction the core of the furnace followed by the refractory insulation, that will insulate the core.