Auto clave for sodium silicate vertical tank

i need to know if you can make autoclave as follows:
auto clave for sodium silicate industry
vertical tank: 18-20 m3
pressure inside: 10-15 bar
ph: 10-14
temperature inside: 250-300 oc
rotating: 2-3 cycle per min
its iron construction has a corrosion resistant for caustic soda /potassium hydroxide concentration 25-50% at temp.180 -250 c ,pressure 8-12 bar