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Thread: Furnace build

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    Default Furnace build

    Hi Guys,
    I have a mate coming over on Sunday with some Koawool and hard face so i thought i had better cut my drum up and sort out a lid removal mechanism. It's almost there, just need to sort out a handle for the lid.

    The burner is likely to be a 1" gas unit from Corin at this stage. These can be drilled to give up to 60kw and it won't ruin the hard face like the oil burner will. I am making the furnace to suit an A25 (4.8l) crucible. Just waiting for it to arrive and then i will make some tongs and a pouring shank, most likely on wheels like Geisser/luckygen's.

    I think i will get some petrobond from that guy in QLD.

    Ew
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    Wow, those crickets are loud indeed! Was that a baby i heard crying?

    My mate came over today and we lined the furnace with isowool, painted it with rigidizer and then coated it with a product called Super 3000, which is actually a mortar, but he uses it to line gas forges with and was sold to him as an alternative hard face that will cope with up to 1600deg. Just need to get the burner in now and then i can fire it up.....

    Ew
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    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Quote Originally Posted by Ueee View Post
    Wow, those crickets are loud indeed! Was that a baby i heard crying?

    My mate came over today and we lined the furnace with isowool, painted it with rigidizer and then coated it with a product called Super 3000, which is actually a mortar, but he uses it to line gas forges with and was sold to him as an alternative hard face that will cope with up to 1600deg. Just need to get the burner in now and then i can fire it up.....

    Ew
    Funnily enough I had a barrel turn up out of the blue last week. The thing that is stopping me with putting my furnace together are the coatings (rigidizer and Super 3000) for the Kaowool. Where did you source these from?

    Additionally, what size drum are you using?

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    The drum is a 60l I think. The rigidizer and hard face came from field furnace in sydney, my mate makes gas forges for knifemakers so he had it all already. I bought the crucible from refractory and ceramic in Melbourne, I think these guys have similar products and are a little closer to you for freight.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Ew,

    Would you mind sharing how much the crucible is costing you?

    Cheers,
    Nick

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    Ahhhh....OUCH! The SiC (Himelt) A25 was $253+GST. Smaller ones can be had on ebay for less but the shipping gets pricey on the larger ones.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Quote Originally Posted by Ueee View Post
    Hi Guys,


    The burner is likely to be a 1" gas unit from Corin at this stage. These can be drilled to give up to 60kw and it won't ruin the hard face like the oil burner will.

    Ew

    Ew,

    what's this about oil burners ruiing hardface? - is this a Kaowool issue, or something about oil burners?
    I'm running diesel/WMVO mix into 1" hardface (kiln shelving) and was unaware of any issues regarding fuel choices

    thanks,
    Des

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    Quote Originally Posted by desbromilow View Post
    Ew,

    what's this about oil burners ruiing hardface? - is this a Kaowool issue, or something about oil burners?
    I'm running diesel/WMVO mix into 1" hardface (kiln shelving) and was unaware of any issues regarding fuel choices

    thanks,
    Des
    From my reading (and nothing else) oil/diesel burners should have a sacrificial brick that takes the brunt on the flame. Otherwise it will eat away at the refractory. I think its an oil problem not a refractory problem, the unburned oil maybe?

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Quote Originally Posted by Ueee View Post
    From my reading (and nothing else) oil/diesel burners should have a sacrificial brick that takes the brunt on the flame. Otherwise it will eat away at the refractory. I think its an oil problem not a refractory problem, the unburned oil maybe?

    Ew
    OK - Thanks for that - another thing learnt today!!!!!

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    looks like you are making good headway ( its all fun ). i have not long ago built my furnace and am currently building a muller for the sand mixing.
    in my furnace i used "superwool " and zircote paint , hopefully its up to the task . i have made an lp gas burner for it too..

    johno
    'If the enemy is in range, so are you.'

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    Mine is a bit of a rush as i need a few one off castings.

    The furnace had her first decent heat up yesterday, about 5 minutes. Enough to make the lower half of the hardface glow red. My petrobond arrived yesterday so now i just need to make some flasks and crucible tongs.

    Ew
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    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Quote Originally Posted by Ueee View Post
    From my reading (and nothing else) oil/diesel burners should have a sacrificial brick that takes the brunt on the flame. Otherwise it will eat away at the refractory. I think its an oil problem not a refractory problem, the unburned oil maybe?
    My oil burner furnace gets to bronze temps. I have a refractory lined drum and it is holding up well. There is no unburned fuel on the furnace wall once the temp comes up. At the start it sprays a bit of a mist onto the hotface but once its running properly the atomised oil just vaporises

    cheers Phil

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    Well i did my first full fire today, i only stopped cause i ran out of gas.

    Ew
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    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Some pics of my first few cast hubs. These are molded in petrobond and poured with nothing but chips i collected from the lathe!

    The first one i ran out of ally, the second my riser was not big enough and it solidified before the hub did, meaning the hub pulled itself apart internally with shrinkage. These are a nice shape to mold as the rim is the thinnest part, follow by the plate and then the hub, meaning shrinkage is not so much of a problem.
    Still a few air bubbles after machining but getting there. Next stop die casting......

    Ew
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    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Nice work.

    I'm interested in solid mould casting. How will you be generating / applying the pressure for die casting.

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