| 释义 |
taconite Geol.|ˈtækənaɪt|
[f. Taconic a. + -ite1.]
a. A type of chert used as an iron ore in parts of N. America.
1905Econ. Geol. I. 48 In the Mesabi district the local name ‘taconite’ is applied to the ferruginous chert. 1951Engineering 22 June 761/2 To be able to take a hard ore, such as taconite, separate the magnetite and silica by grinding the material down to pass a 300-mesh sieve, and agglomerate the concentrates by pelletising, at a price to compete with imported ores, was no mean achievement. 1981D. R. Coates Environmental Geol. v. 104/1 Taconite is a low-grade ore of iron which is the source of most current U.S. iron production.
b. attrib., as taconite mine, taconite ore, taconite pellet, taconite tailing.
1974Sumter (S. Carolina) Daily Item 23 Apr. 7b/7 Reserve, which..produces 15 per cent of the iron ore used in the nation's steelmaking blast furnaces, also closed its taconite mine at Babbitt.
1975Sci. Amer. Nov. 52/3 The place of the high-grade ores was then taken by taconite ores containing iron in the form of finely disseminated magnetite.
1958J. Szarkowski Face of Minnesota 270 By 1948 the first mass-produced taconite pellets reached the blast furnaces.
1975Telegraph (Brisbane) 18 Mar. 12/4 The refinery's discharge of taconite tailings. |