Microwave and hot waste gas combined heating and drying system and method for blast furnace lump ore

The invention discloses a microwave and hot waste gas combined heating and drying system and a method for blast furnace lump ore. The heating and drying system comprises a chain grate machine (10), a feeding device and a heating and drying device combination, a hot waste gas blowing device, the heating and drying device combination comprises a microwave heating device (14), the microwave heating device is arranged above the chain grate machine, and a microwave emission port faces downwards to the chain grate machine; a hot waste gas blowing device (12) which is arranged below the chain grate machine, and a blowing outlet (13) faces upwards towards the chain grate machine, the heating and drying method comprises the steps that the blast furnace lump ore (15) is laid on the chain grate machine through the feeding device, the microwave heating device emits microwaves to heat and dry the blast furnace lump ore on the chain grate machine, and the hot waste gas blowing device conveys external hot waste gas to penet