Grinding steel ball heat treatment typically includes heating, insulation and cooling processes. These steps connect with each other and can’t be interrupted. Wherein, heating is an important step. There are many heating methods for heat treatment. Charcoal and coal are the oldest heat producer, which are generally replaced by liquid or gas fuels. The electricity application makes temperature control easier and no environment pollution. These heat fuels can be used to heat directly or indirectly by molten salt or floating particles.