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23rd June 2013, 02:30 PM #16.
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Ah ha, that folded blanket stuff is commonly used here in WA for pizza ovens. I see packs of it for sale occasionally on gumtree by folks who want to sell their excess after making their ovens.
If any of the blanket is exposed it will slowly fray and fibres will get into the exhaust fumes and go all over the place.
My understanding is the rigidizer doesn't completely cure this problem but greatly reduces it.
Are you doing this inside a shed? If so, good ventilation is needed, not just for the remaining fibres but also exhaust gases.
The rigidizer came in 1L containers and I managed to do my small forge with ~300 mL.
I bought 2L and it cost $65 but it should do me for many relinings of the furnace.
Most rigidizers are a suspension of colloidal silica and caustic plus a few other bits and pieces.
I think the higher temp versions also contain zirconia.
Here's a typical MSDS
http://www.morganthermalceramics.com...merica/205.pdf
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23rd June 2013 02:30 PM # ADSGoogle Adsense Advertisement
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23rd June 2013, 04:52 PM #17
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23rd June 2013, 08:07 PM #18SENIOR MEMBER
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- Jun 2004
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- Kyabram. Vic
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Stuart,
Those heavy firebicks are heat retainers and used as face bricks for fireplace and pizza/bread ovens. They soak the heat then slowly emit it. The lightweights are reflective and used in kilns/furnaces.
I have the lightweights; not sure if they are 1300c or 1700c.
R & F had carbide and graphite crucibles. IIRC the graphite are the higher temp, but more fragile.
There were several old gentlemen and I mean that in every sense. When I explained that I intended to make a furnace they almost fell over themselves to help with any question and made numerous suggestions.
Things were quiet; so maybe I was a fresh new body to talk to.
If and when I get on track with the project I will certainly deal with them again.
Ken
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23rd June 2013, 10:27 PM #19GOLD MEMBER
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- Jul 2010
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- Melbourne
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Hi DSEL74,
I'm SE Melb so I am likely just a little closer than you, but thanks for the offer.
Hi Ken,
R & F? or R & C..
I was thinking heavy bricks would put up with more "issues" from flames and oil etc?
Might try and get myself down there Saturday morning. Though I have a couple of other things to pick up.
Stuart
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28th June 2013, 02:28 PM #20
Hey Stuart,
Only just found this thread... anything we can help with let me know..
I knew you'd find an excuse to wear that helmet...
Regards
Ray
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29th June 2013, 09:33 PM #21GOLD MEMBER
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- Jul 2010
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- Melbourne
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- 7,775
Hi Ray,
Thanks for that. I thought I was a closer to being ready to start putting things together than I am is seems lol
Though in my defence I am skipping Alum. I've got a gas reg on the way. The plan ATM is to wait until I get a crucible so I know how big things need to be. I'm thinking something that will hold 10kgs of cast iron. To much?
One of the many things I havent got on the go is titiaium wire.
6 yards of 20G long enough and thick enough?
Titanium Color Wire Beadsmith 20 Gauge 6yd 41809 Round | eBay
There just arent enough fancy dress parties these days
Stuart
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30th June 2013, 12:07 AM #22
Titanium wire? to tie insulation is place? or am i way off.......
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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30th June 2013, 01:10 AM #23GOLD MEMBER
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- Melbourne
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1st July 2013, 12:03 PM #24SENIOR MEMBER
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- Oct 2012
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- Australia
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1st July 2013, 09:46 PM #25GOLD MEMBER
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- Jul 2010
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- Melbourne
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Hi Josh,
Just how much does a full sized Alum ingot weigh?
Stuart
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1st July 2013, 11:04 PM #26SENIOR MEMBER
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- Oct 2012
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- Australia
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- 765
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1st July 2013, 11:33 PM #27
I don't know if this will assist you in spec'ing your furnace or not.
Metals - Melting Temperatures
Melting temperature of some common metals and alloys
Melting points of some metals and alloys are indicated in the table below:
Metal Melting Point (oC) (oF) Admiralty Brass 900 - 940 1650 - 1720 Aluminum 660 1220 Aluminum Alloy 463 - 671 865 - 1240 Aluminum Bronze 600 - 655 1190 - 1215 Antimony 630 1170 Babbitt 249 480 Beryllium 1285 2345 Beryllium Copper 865 - 955 1587 - 1750 Bismuth 271.4 520.5 Brass, Red 1000 1832 Brass, Yellow 930 1710 Cadmium 321 610 Cast Iron, gray 1175 - 1290 2150 - 2360 Chromium 1860 3380 Cobalt 1495 2723 Copper 1084 1983 Cupronickel 1170 - 1240 2140 - 2260 Gold, 24K Pure 1063 1945 Hastelloy C 1320 - 1350 2410 - 2460 Inconel 1390 - 1425 2540 - 2600 Incoloy 1390 - 1425 2540 - 2600 Iridium 2450 4440 Iron, Wrought 1482 - 1593 2700 - 2900 Iron, Gray Cast 1127 - 1204 2060 - 2200 Iron, Ductile 1149 2100 Lead 327.5 621 Magnesium 650 1200 Magnesium Alloy 349 - 649 660 - 1200 Manganese 1244 2271 Manganese bronze 865 - 890 1590 - 1630 Mercury -38.86 -37.95 Molybdenum 2620 4750 Monel 1300 - 1350 2370 - 2460 Nickel 1453 2647 Niobium (Columbium) 2470 4473 Osmium 3025 5477 Palladium 1555 2831 Phosphorus 44 111 Platinum 1770 3220 Plutonium 640 1180 Potassium 63.3 146 Red Brass 990 - 1025 1810 - 1880 Rhenium 3186 5767 Rhodium 1965 3569 Ruthenium 2482 4500 Selenium 217 423 Silicon 1411 2572 Silver, Coin 879 1615 Silver, Pure 961 1761 Silver, Sterling 893 1640 Sodium 97.83 208 Steel, Carbon 1425 - 1540 2600 - 2800 Steel, Stainless 1510 2750 Tantalum 2980 5400 Thorium 1750 3180 Tin 232 449.4 Titanium 1670 3040 Tungsten 3400 6150 Uranium 1132 2070 Vanadium 1900 3450 Yellow Brass 905 - 932 1660 - 1710 Zinc 419.5 787 Zirconium 1854 3369
- T(oC) = 5/9[T(oF) - 32]
What are you guys paying for you ingots, Aluminium, Brass, Nickel??
…..Live a Quiet Life & Work with your Hands
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2nd July 2013, 01:43 AM #28SENIOR MEMBER
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- Oct 2012
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2nd July 2013, 11:02 PM #29GOLD MEMBER
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5.5kgs, thats big enough for about 17kgs iron
If my maths is right that should be doable.
My Reg turned up today, only just fits on the bottle, misses the guard(?) my a couple of mm's. Got to be lucky sometimes.
1290C sounds much nicer, though I assume it needs to be hotting thatn that to pour?
$2-3 kg! my scrappy charges $6.6 kg for his scrap.
Stuart
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2nd July 2013, 11:36 PM #30SENIOR MEMBER
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- Oct 2012
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