not many know how to weld aluminum , lpg gas equivalent to argon welding

Copy the title or at least part of it and go searching young man....

Yeah and he uses a steel welding rod to scrape the dross out of the weld.... It's a new idea to me. However, IF you could run High Frequency circuit into the job, and up through the near plasma of the flame, and into the torch, you could have HF cleaning of the weld while your welding.... Me thinks that is worthy of doing...

Or at least trying it.... BUT because the carbon rich flame kind of acts both as a heater and as a shielding gas... and the weld is fairly contaminated... it might work - or it might only work if you have a high amount of bias in the cleaning cycle - or even use a DC cleaning of the weld.... the composition and temperature of the LPG / oxygen flame might lend it's self to significant conductivity since it's forming ionised water vapour (mixed with C0 and CO2) in the process of combustion.... Dunno I'd be prepared to fuck around with it to see if it can be made to work really well....

I forget the formula of slaked lime and a high alumina clay - but I was making heat reflecting dips for TIG torches and what happend in DC welding was that when the calcium hydroxide sat on the tungsten electrode, and welded electrode negative, not sure of the exact reaction but the oxygen burned off the tungsten at a furious rate, the calcium combined with the tungsten to lower it's melting point and that caused rapid evaporation and the tungsten turned a very pretty rainbow colour.... What was left of it that is.... You see Calcium Oxide has a melting point of 3500*C... and steel gets nice and runny by around 1400*C... but learning to a degree by reasonably safe experimentation is a good thing... or t least stand a safe distance away if you think there could be a massive explosion...