No, you should not use a cast iron skillet in a kiln to melt anything. A kiln is specifically designed for firing clay, ceramics, and other heat-resistant materials at high temperatures for purposes like pottery-making, glazing, or metalworking. It operates at much higher temperatures than what a cast iron skillet can withstand.
Cast iron skillets are meant for stovetop and oven use, and while they can handle high temperatures, they have their limits. Typically, cast iron skillets are not designed to withstand the extreme temperatures found in a kiln, which can reach several thousand degrees Fahrenheit. If you place a cast iron skillet in a kiln, it could warp, crack, or even melt due to the intense heat, potentially damaging the kiln and the items inside.
If you need to melt materials or metals, it's essential to use the appropriate equipment designed for that purpose, such as a crucible or a melting furnace. These are specifically designed to handle high temperatures and melting processes safely.
Always use cookware and equipment for their intended purposes, and be cautious when working with high temperatures to ensure safety and prevent damage to your tools and surroundings.