The continuous roasting continuous casting mainly used for casting water glass and silica sol shells is suitable for small and medium-sized mold shells with large output. Technically, the thermal insulation performance and control precision of the original national standard are significantly improved, and the original single national standard size is changed to a custom size. In order to adapt to the use of heating methods in various areas of the region, there are more choices: electric heating, natural gas, liquefied petroleum gas, diesel and so on. The lowest energy consumption is natural gas heating. On this basis, the regenerative natural gas heating energy consumption is lower than all the heating media above.