Magnetite-based sintered ore and method of producing same

A method of manufacturing a magnetite-based sintered iron ore, comprising:

• a) compacting a magnetite ore powder or a magnetite ore powder mixture into a magnetite ore lump using a pressure of 30 to 500 MPa;
• and
• b) sintering the magnetite ore lump prepared in a) at a temperature of 1100° C. or above through microwave irradiation,
• wherein the magnetite-based sintered iron ore has a reducibility index at a reduction rate of 0.7%/min or more in a 1000° C. 40% CO-60% N2 gas atmosphere,
• wherein when a pressure of 250 MPa or more to 500 MPa or less is applied to the magnetite ore lump in step a), the heating temperature through microwave irradiation is 1100° C.˜2000° C. in step b),
• when a pressure of 62 MPa or more to 250 MPa or less is applied to the magnetite ore lump in step a), the heating temperature through microwave irradiation is 1150° C.˜2000° C. in step b),
• when a pressure of 30 MPa or more to 62 MPa or less is applied to the magnetite ore lump in step a), the heating temperature through microwave irradiation is 1200° C.˜2000° C. in step b),
• wherein the magnetite ore or the magnetite ore mixture itself is sintered by the steps of a) to b) and used directly as a sintered ore, and
• wherein the magnetite ore powder mixture further comprises at least one of a hematite ore, a carbonaceous material, and an additive, in addition to the magnetite ore powder.