Rotary Furnace

Rotary furnaces are batch furnaces that generally utilize oxy-fuel burners and limit the volume of off-gases. The rotary furnace design gives high utilization of the input energy compared with the stationary furnace; they are very flexible and can accept a wide variety of feed materials. Since it is a batch furnace, the components of the furnace charge can be easily calculated on a weight or volume basis. The furnace can be operated by relatively unskilled workers who charge a batch into the furnace, smelt it for a given time period (4–6 h) and tap the furnace bullion and slag. The slag utilized by most of the rotary furnaces is FeS–Na2S matte. Iron is added as a reducing agent along with coke and produces an oxide slag-matte combination.

  • Lead
  • Zinc
  • Copper
  • Iron 

Performance of rotary furnace is dependent on refractory bricks and the usage of refractory bricks can vary depending on  the metal it is used to melt.

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