Heat exchange system capable of recycling waste heat of reduction furnace

The invention discloses a heat exchange system capable of recycling waste heat of a reduction furnace. The heat exchange system comprises the reduction furnace, a raw material unit and a heat exchange unit, wherein the reduction furnace is provided with a first heat exchange channel; the raw material unit is used for supplying reaction raw materials to the reduction furnace, and provided with a second heat exchange channel; an inlet of the heat exchange unit is connected with an outlet of the first heat exchange channel, and an outlet of the heat exchange unit is connected with an inlet of the first heat exchange channel; a connecting pipe is arranged between the heat exchange unit and the second heat exchange channel. Due to the facts that the inlet of the heat exchange unit is connected with the outlet of the first heat exchange channel, the outlet of the heat exchange unit is connected with the inlet of the first heat exchange channel, and the connecting pipe is arranged between the heat exchange unit and the second heat exchange channel, surplus heat in the reduction furnace is transferred to the raw material unit through the heat exchange unit, the heat collection cost of the raw material unit is largely reduced, and waste heat in the reduction furnace is recycled.