Isasmelt is like a giant oven that melts metal. Do you know how when you bake cupcakes, you mix all the ingredients together and put them in the oven? Isasmelt is similar but instead of cupcakes, it melts metal.
People use Isasmelt to melt metals like copper, lead, and zinc so that they can separate them from other materials that they don't want. They put the metal and other materials inside the Isasmelt and turn up the heat. Then, the metal starts to melt and separate from the other stuff.
The really cool thing about Isasmelt is that it doesn't produce a lot of waste. This means that after the metal is melted and separated, there isn't a lot of leftover stuff to throw away. Instead, it can be used again to make new things or recycled.
Overall, Isasmelt is like a super-powered oven that can help people separate metals and create less waste.