Functional Description

Chips from machining operations are fed into the screw feeder hopper (A). The screw feeder feeds the chips into the rotary hearth (D) at a constant rate. In the rotary hearth, the chips are typically heated to a set point temperature between 800 and 900°F to vaporize the water and oil. Products inside the rotary hearth (D) are indirectly heated. Natural gas fired burners/furnace oil burner to heat the rotary hearth from the outside. These burners are fired into a cavity between the outside of the rotary hearth and in-side of the furnace shell refractory. There is no direct flame impingement on the chips or extreme temperatures that could result in surface oxidation of the chips.

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