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pippin88
15th Sep 2014, 05:07 PM
I'm just starting my furnace build.
Plan is castable 1600ºC hot face, kaowool insulation backing, waste oil burning (the brute style design).

Hopefully someone else local finds this helpful
I spent quite a while trying to find suppliers without much success until a business referred me on to:

Beroa
303/1B George St
Mayfield NSW
(02) 4960 0441

I wandered in, and they are clearly set up for big jobs for industry, but they were extremely helpful. Michael assisted me and knew exactly what I needed.

$50 even for a 25kg bag of Duracast 1600AR ($83 at Field Furnace Refractories).
They also sell Kaowool, at about $100 for a roll of 50x610x3660 or 25x610x7320. I won't need nearly that much, so they advised me to pop in in a week or so, when they've finished a job, and they'll likely have some offcuts that I can buy. :2tsup:

I was contemplating freight from Sydney for this stuff, so it was a great find.

Now I just need to find a decent furnace shell.

pippin88
15th Sep 2014, 05:27 PM
From: http://www.engsupplies.com.au/dense-castables.html

DURACAST 1600AR
DESCRIPTION:

A conventional cement bonded castable, which has good strengths and dimensional stability.

Maximum Service Temperature (oC) 1600

Dry material required per cubic metre (kg) 2140

Maximum grain size (mm) 8

Water addition (litre/100 kg) 10-12

MODULUS OF RUPTURE (MPa)

After drying at 110oC 12

After heating to 1000oC 8

After heating to 1600oC 12

COLD CRUSHING STRENGTH (MPa)

After drying at 110oC 50

After heating to 1000oC 40

After heating to 1200oC 90

PERMANENT LINEAR CHANGE (%)

After drying at 110oC neg

After heating to 1600oC -1.5

THERMAL CONDUCTIVITY (cast)

At a mean of 1000oC (W/m/oK) 0.85

Storage life (under ideal conditions) Twelve (12) months

TYPICAL CHEMICAL ANALYSIS (%)

Al2O3 SiO2 Fe2O3 CaO TiO2 Alkalies
56 37 0.6 4.8 1.5 0.4

12bolts
20th Sep 2014, 06:36 PM
I'm just starting my furnace build.......Now I just need to find a decent furnace shell.
You dont say what size, but lpg cylinders make great shells.

Cheers Phil

pippin88
21st Sep 2014, 12:05 PM
Phil,

I'd like a chamber size of 8-10". Planning 1" refractory, 2" ceramic wool.
I've seen lpg tanks used as shells - just need to find one, not sure where they go to heaven?

pippin88
25th Sep 2014, 11:01 PM
Manage to snag a 9kg LPG cylinder (well actually tetrafluoroethylene, which is non-flammable) at a scrap place today. They had a skip full of 9kg cylinders. Had some bigger ones too (45kg I guess).

They gave it to me for free because they are not allowed to sell to the public...
Very nice of them.

cava
8th Apr 2015, 02:48 AM
Any progress on the furnace build and how it is all coming together?

Pictures would be great. :D

pippin88
10th Apr 2015, 09:03 PM
Haven't got any further, been working on other projects.

Starting to plan again however, having been inspired by myfordboy on YouTube.