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Iron ore

About: Iron ore is a research topic. Over the lifetime, 5679 publications have been published within this topic receiving 40103 citations. The topic is also known as: iron ores & ore of iron.


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Journal ArticleDOI
TL;DR: In this article, life cycle assessments of the mining and mineral processing of iron ore, bauxite and copper concentrate were carried out, focussing on embodied energy and greenhouse gas emissions.

441 citations

Journal ArticleDOI
TL;DR: The most important factors that govern compositional variations in hydrothermal magnetite are (A) temperature, (B) fluid composition, (C) oxygen and sulfur fugacity, (D) silicate and sulfide activity, (E) host rock buffering, (F) reequilibration processes, and (G) intrinsic crystallographic controls such as ionic radius and charge balance as mentioned in this paper.

399 citations

Journal ArticleDOI
TL;DR: In the Hamersley Basin of Australia as mentioned in this paper, the inferred rate of influx of iron into the basin is so large that a derivation of the iron from weathering and transport into the Basin by rivers is unlikely.
Abstract: Recent work on one of the major banded iron-formations of the world--that of the Hamersley Basin of Australia--has defined the total amount of iron and the probable time interval of accumulation of the large iron ore deposits in the basin. The inferred rate of influx of iron into the basin is so large that a derivation of the iron from weathering and transport into the basin by rivers is unlikely. For the same reason derivation of the iron from volcanic sources is also unlikely. Derivation of the iron from the ocean floor is quantitatively possible if deep ocean water containing a few mg/1 of dissolved iron welled up, was oxidized in near surface environments, and deposited its iron in the basin. Iron concentrations of a few mg/1 in deep ocean water are quite reasonable if these water masses were saturated with respect to siderite and calcite.

325 citations

Journal ArticleDOI
TL;DR: In this article, an overview on the utilisation of solid wastes with focus on blast furnace slag, red mud and fly ash generated in large quantities from iron and steel industry; primary aluminium production and coal fired power plants, respectively.
Abstract: This paper is an overview on the utilisation of solid wastes with focus on blast furnace slag, red mud and fly ash generated in large quantities from iron and steel industry; primary aluminium production and coal fired power plants, respectively. Innovative methodologies, based on the recent research by the authors, are highlighted and these include: (a) smelting reduction of red mud to produce pig iron and titania rich slag, (b) mechanical activation of the slag and fly ash to prepare improved blended cements in terms of higher usage of waste and enhanced cement properties, (c) synergistic usage of fly ash, blast furnace slag and iron ore tailings in the preparation of floor and wall tiles and (d) preparation of synthetic granite from fly ash as a value added product.

309 citations

Journal ArticleDOI
TL;DR: In this article, columnar magnetite, a conspicuous form of magnetite at El Laco with occasional dendritic branching, has been found in two other apatite iron provinces: the Cretaceous iron belt in Chile, a 600-km-long zone along the Pacific with about 40 deposits, and the Early Proterozoic Kiruna ore field in Sweden.
Abstract: Magnetite lavas and feeder dikes on the flanks of the volcano El Laco in the Chilean Andes are characterized by textures demonstrating rapid crystal growth from supersaturated melts. Columnar magnetite, a conspicuous form of magnetite at El Laco with occasional dendritic branching, has been found in two other apatite iron provinces: the Cretaceous iron belt in Chile, a 600-km-long zone along the Pacific with about 40 deposits, and the Early Proterozoic Kiruna ore field in Sweden. Presence of columnar magnetite in an iron ore is suggested to be diagnostic of a magmatic origin. Platy magnetite, another dendritic form widespread at Kiruna, also occurs at El Laco. Moreover, many ores of the three provinces contain pyroxene or pseudomorphs after it with dendritic morphology. The occurrence of similar rapid-growth textures in the investigated apatite iron ores demonstrates a similar origin with emplacement of ore magmas at or near the surface. In fact, existence of vesicular ore lava and pyroclastic ore at Kiirunavaara shows that this deposit is volcanic.A common origin of the ores is supported by similar compositions of their magnetites. Analysis of ca. 50 concentrates from 17 deposits shows that the magnetites are very poor in Cr (<10 ppm) and relatively rich in V (ca. 1,000-2,000 ppm); the Ti content is typically low (ca. 100-1,000 ppm, with occasional values up to 5,000 ppm). Common ranges (in ppm) for other elements are Al = 200 to 1,500, Mg = 500 to 2,000, Mn = 200 to 900, Ni = 100 to 250, Co = 20 to 140, Zn = 50 to 120, and Cu = 10 to 50. The magnetites from El Laco and Kiruna are remarkably similar with the exception of Mg values which are about five times higher at El Laco (4,000-8,000 ppm). Magnetite in sedimentary ores appears to be significantly lower in V.

305 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023162
2022421
2021155
2020257
2019324
2018316