I think that big mining center can be used to heat a small town, it looks like a good option as for me
There's more than enough industrial heat "left over" for that already, but it's not that easy to use for heating on a large scale.
The sooth is also converted to vapour and doesn't seem like a concern to the climate or ozone layer.
I know there are more industrial heat, but this is quite different in the sense that it is deliberate in the recycling process and have considered options that concerns sooth emissions and any condition that used to affect the previous implementation of waste to energy solutions.