2018年9月1日 · Oolitic iron ores are a distinctive subset of iron ore deposits, and are characterised by their spherical grains composed of concentric layers containing hematite and goethite along with impurity elements such as silicon and phosphorus.

Oolitic iron ore, also known as iron oolite, is specific for its composition of small magnetic grains of red iron ore in a sandy, calcareous or clayey matrix. Significant deposits were found in England, France, Württemberg and Russia, especially in the Jurassic period.

DESCRIPTION: Beds rich in iron silicate and oxide minerals with distinctive oolitic texture deposited in shallow-shelf to intertidal, clastic-dominated environments.

2024年9月29日 · The distinctive oolitic structure within the ore is regarded as the primary factor causing the difficulty in the beneficiation of oolitic hematite ore. The objective of this study is to devise an effective approach to tackle the issue of beneficiation of oolitic hematite ore, thereby facilitating the utilization of oolitic hematite ore, which ...

2013年1月30日 · The morphological and mineralogical characterizations of a Chinese oolitic iron ore (Exi deposit) were studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy in this work. It is shown that the Exi ore is mainly composed of hematite, quartz, apatite, and chlorite.

2020年5月9日 · The results show that the high-phosphorus oolitic iron ore is a chemical sedimentary iron ore, mainly composed of oolite (more than 60%). Specifically, the ooids consists of oolite nuclei, collophanite girdles, and hematite and limonite girdles; the detritus is composed of fine-grained hematite and quartz feldspar; and cement is composed of ...

2015年10月10日 · In this study, an oolitic iron ore was isothermally reduced by coal at 1423 K–1573 K, and the reduction kinetics and mechanisms were investigated using the thermogravimetry (TG) technique. The characteristics of reduced samples were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X …

2019年6月21日 · High-phosphorus oolitic iron ore, treated by suspended flash magnetic roasting, contained 42.73% iron (mainly present as magnetite) and 0.93% phosphorus (present as collophane). Low-intensity magnetic separation (LIMS) was combined with reverse flotation to increase the iron and reduce the phosphorus contents of the roasted product.

Oolitic iron ores are made up of silicate, oxide, and carbonate minerals that are part of solid solution series. The compositions of the minerals can depart from pure end members and show variation among deposits. This variability can be quantified using electron microprobe techniques.

2017年2月18日 · To reveal the formation and characteristics of metallic iron grains in coal-based reduction, oolitic iron ore was isothermally reduced in various reduction