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Definition of natural ore

i. In iron mining, the term given to naturally occurring high-grade iron ore; consists of: (1) soft ore, such as porous hematite and limonite (goethite) with minor magnetite and manganese oxides; and (2) hard ores, such as compact, fine-grained, steel-gray hematite, specular hematite, magnetite, or martite.

Synonym of: direct shipping ore

ii. Iron ore that contains moisture, in contrast to 'dry ore' that has been dried but not calcined.

Ref: USBM, 7

iii. A term used in the U.S. Lake Superior mining district to indicate iron ore formed by natural processes, as distinguished from iron ore products (such as pellets) produced artificially from hard, low-grade ores of the taconite type. Published prices for natural ores from this district usually specify iron content as 'natural,' meaning that the analysis is based on gross weight including moisture.

Synonym of: lump ore, silicious ore, high-silica ore, wash ore, heavy-media ore, manganiferous ore, natural ore concentrate, lean ore, paint-rock ore, Mesabi non-Bessemer ore


 
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