Patent ID: 8414827

Claim:
A method for preparing a porous lightweight iron, which comprises the steps of: (a) adding 2 to 150 parts by weight of a non-metallic mineral to iron ore based on 100 parts by weight of the iron ore, wherein the non-metallic mineral is at least one non-metallic mineral selected from the group consisting of zeolite, bentonite, limestone, silica sand, dolomite, bauxite, silica stone, and fluorite; (b) pulverizing the iron ore and the non-metallic mineral together; (c) mixing 100 parts by weight of the pulverized product obtained in the step (b) with 2 to 20 parts by weight of diamond; (d) sintering the mixture obtained in the step (c) in a sintering furnace at a temperature of 1100 to 1400° C. for 2 to 5 hours; and (e) obtaining the resulting porous lightweight iron after the completion of the sintering.