I found this. Maybe this is an answer.
I don't know if this would work. Seems pretty cool.
Model HP22S36- 22-inch diameter hot plate shown on optional casters, with extra power for warming a full 55- gallon drum. Temperature is controlled with an analog AH thermostat. Drum not included.
STANDARD MODELS include steel plates
Thermostat may be mounted or remote
240 1phHP 18S16
240 1ph or 3phHP 22S23 22 dia x 5 high
240 1ph or 3phHP 22S36
240 1 ph or 3phHP 22S42 22 dia x 5 high 15,900
240 480,1 ph or 3ph
Model HP18S16 will heat 20 gallons of water in a covered stock pot from 70F to 210F in 2 hours Model HP22S42 will heat 20 gallons from 70F to 210F in 55 minutes. Due to lower specific heat values, most liquids and blends will heat faster than water, .
Contact Wenesco for quotes on your unique size and power requirements.
S200 Insulation Blanket (shown below) maximizes heating efficiency when heating drums as heat loss is significantly reduced. The S200 blanket is durable and flexible, and complements any 55-gallon (208 liter) metal or poly drum. For indoor use.
Heavy-duty aluminum foil surface
1.5" (38mm) fiberglass insulation
Closure via flexible cords with S-hooks
450°F (226°C) maximum exposure temperature on drum surface
S200 Insulation Blanket shown wrapped around a drum which is mounted on a HP22 hot plate. Blanket price: $198
Wenesco also offers customized hot plates; please contact us with your requirements
Please direct your inquiries and orders to our factory sales office
Wenesco, Inc., 3057 N Rockwell, Chicago, Illinois, 60618.
Telephone (773) 463 9200. Toll-free: (800) 233-4430. FAX: (773) 463 1400 Habla Espanol? Telefono Juan Hernandez- ext 16