
Milling Media
#61
Posted 12 November 2003 - 08:31 PM
#62
Posted 12 November 2003 - 09:01 PM
Tris
#63
Posted 21 November 2003 - 10:53 PM
Stuart
#64
Posted 21 November 2003 - 11:20 PM
if you wanna make some heat then its easy, get a load of bricks, or dig a hole in the ground, mix 1 part water to 1 part vegetable oil, use a feed, hook it up, light a fire and tunnel in a hole with a haridryer blowing in air, then feed in the fuel/water mix and it burns hot
#65
Posted 21 November 2003 - 11:31 PM
Stuart
#66
Posted 21 November 2003 - 11:51 PM
a pile of paper could melt KNO3 easily
#67
Posted 22 November 2003 - 02:00 PM
#68
Posted 22 November 2003 - 02:56 PM
PanMaster, on Nov 21 2003, 11:51 PM, said:
hmmm, I think you will need a tempurture of 2500C+ to melt steel.i'm talking about melting steel
a pile of paper could melt KNO3 easily
#69
Posted 22 November 2003 - 10:39 PM
There is a huge difference between HEAT and TEMPERATURE.
A flame can burn at 1500 deg c but it will melt nothing if the 'thing' can shed the heat faster than the flame can give it.
Steel actually begins to soften at about 1000 deg c (red heat) and becomes bendy only a little hotter. By 1500 ( white heat) it is well molten.
If you want to melt steel you need to get the heat onto it and keep it there, hence a furnace, which is usually well insulated. There are lots of ways to generate the heat, from a propane torch up.
If you want to use oil and water you have to feed them separately or else the oil floats and you just get water coming out of your pipe, which doesn't burn so well. Best way is to drip them onto a piece of angle iron which runs down into the fire box. You still have to get the fire box hot enough first or else you end up with a sticky mess. The reason why oil and water works is that the water instantly turns to steam, thereby blowing the oil into tiny droplets which burn. It takes a bit of work to set this up.
#70
Posted 22 November 2003 - 11:53 PM
Gor, on Nov 22 2003, 10:39 PM, said:
My mistake - I read the boiling point colom rather then melting point...Steel actually begins to soften at about 1000 deg c (red heat) and becomes bendy only a little hotter. By 1500 ( white heat) it is well molten.
#71
Posted 11 December 2003 - 05:52 AM
I got my lead from a tire shop, they throw away the old lead weights when they balance a tire. This is hardened lead and works creat for making lead balls.
I made the mold out of plaster of paris and a marble as model. Works great.
#72
Posted 11 December 2003 - 11:21 PM

Any idea what's in them wheel weights?
Edited by bernie, 11 December 2003 - 11:22 PM.
#73
Posted 12 December 2003 - 03:09 PM
BTW I use about 200 short pieces of brass pipe about 8 mm in diameter and 20 mm in length filled with lead as milling media. It's a sysiphus job to make them but they work great and last forever.
Edited by tomu, 12 December 2003 - 03:10 PM.
#74
Posted 13 January 2004 - 10:52 PM
Lead Shot
Tris
#75
Posted 13 January 2004 - 11:45 PM
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