In a lot of my experiments I find that I need to reach 250-350 °C . Using a torch works only some times because sometimes I need to heat up a big area or I have to heat it up in a container(by torch i mean the 'desktop' one that stands up right). So what do you guys use?(I am thinking of something like a cook top but the electrical ones have a limited temeprature).Usage E.G.: turning coppera carbonate into copper oxide, melting sodium hydroxide.Also when im allready here I want to ask where is the carbothermal reduction of sodium carbonate topic I searched all the topics with sodium carbonate and didn't find it.So could the person that told me it allready existed please point me to it?