This is a small one. But it works well. I smelted nineteen ingots My first run. I used about two thirds of a grill Propane tank. Once I got the thing hot (about fifteen minutes) It went really well. I was about six hours at it. It was hot enough to melt copper tubing out of my hand. I used a stick of half inch copper as a stirring stick and it melted at about one inch per second. It's probably 3000 degrees.
I had to order my own refractory cement. Which was kind of a chore. Because you have to coat the blanket with refractory cement. I just bought a tub at the hardware store. I spent twenty five dollars on that, but it was a good investment. The product comes with some refractory cement but I would recommend picking some up. Because it saves the thermal blanket. After six hours of continuous use, the thermal blanket is in perfect condition. Because I coated it heavily with refractory cement.
It actually got hot enough to Soften my crucible. After five hours, I pulled a little chunk off the crucible while lifting it out of the kiln. It's plenty hot. All in all I give it an A+. It is exactly what I wanted to smelt my scrap wire and copper tubing into ingots.
Ken 
