Tell the correct configuration for the melting speed x2. What other parameters would remain standard (Wood weight, sulphur 2.5 metal 5, etc.)

  "Speed Multipliers": {
    "furnace": 2.0,
    "furnace.large": 2.0
  },
  "Fuel Usage Speed Multipliers": {
    "furnace": 2.0,
    "furnace.large": 2.0
  },

Merged post

Add the the Small Oil Refinery, and the static ones from the map.