As a major byproduct generated in the alumina industry, bauxite ore residue is an important reserve of scandium and titanium. In this study, the feasibility and mechanism of enriching Sc 2 O 3 and TiO 2 from a non-magnetic material, which was obtained from carbothermal reductive roasting and magnetic separation of bauxite ore …

Aluminium is derived from alumina (Al 2 O 3), which is obtained mainly by processing bauxite ore. Alumina production generates bauxite residue, commonly known as red mud 5 .

The materials with a scandium content of 20-50 ppm are considered an ore. Therefore, bauxite residues containing a higher scandium concentration can be investigated as scandium resources [28, 29 ...

The former refers to DSP from the mineral's reactive silica, the latter to pre-addition of kaolin. The effect of DSP content was studied by mixing it with bauxite residue in all cases, except in ...

It is well known that bauxite residue produced during the Bayer alumina production from bauxite ore is considered as a hazardous waste due to its high alkalinity (Power et al., 2011, Verma et al., ... Extraction of scandium from scandium-rich material derived from bauxite ore residues. Hydrometallurgy, 176 (2018), pp. 62-68.

Bauxite residue is an alkaline waste byproduct generated by the extraction of alumina from bauxite. The production of 1 t of alumina generates about 1.5 t of bauxite residues (Hamada 1986 ). Globally, about 120 million tons of bauxite residue is produced annually and the global inventory reached more than 3.5 billion tons in 2014 (modified …

Bauxite residue is an insoluble solid waste by-product generated after the digestion of gibbsitic bauxite ore with sodium hydroxide at elevated temperature and pressure in the Bayer process for the extraction of alumina. During the digestion process, aluminum minerals react with caustic soda process liquor to form soluble sodium …

The Bayer process for alumina production generates more than 160 million tons of bauxite residue annually. The current global stockpiles of bauxite residue have reached more than 4 billion tons with less than 2% annual recycling rate. Critical elements such as Sc and Y present an opportunity to explore bauxite residue as a secondary …

However, some bauxite residues contain considerable concentrations of rare-earth elements (REEs) and the recovery of these REEs together with (out) other …

Red mud (RM, also known as bauxite residue) is one of the wastes generated by the aluminium industry and its disposal and utilization have been …

The separation of iron ore from solid waste can be achieved using a physical process. In order to decrease the burden of batch sintering and recycle the iron mineral, Li (2005) investigated the new iron ore dressing of bauxite residue. Firstly, the ore sand was separated from the bauxite residue by washing twice.

bauxite residue. Annual production of smelter and chemical grade alumina in 2015 was about 115 million tonnes produced using the Bayer process. The global average for the production of bauxite residue per tonne of alumina varies from 1 to 1.5 tonnes, so it is estimated that about 150 million tonnes of bauxite residue is produced annually.

DOI: 10.1016/j.jhazmat.2017.02.022 Corpus ID: 23379762; Enrichment of Sc2O3 and TiO2 from bauxite ore residues. @article{Deng2017EnrichmentOS, title={Enrichment of Sc2O3 and TiO2 from bauxite ore residues.}, author={Bona Deng and Guanghui Li and Jun Luo and Qing Ye and Mingxia Liu and Zhiwei Peng and Tao Jiang}, journal={Journal of …

Aluminium is derived from alumina (Al 2 O 3 ), which is obtained mainly by processing bauxite ore. Alumina production generates bauxite residue, commonly known …

Resources with scandium content between 20 and 50 ppm can be considered as an ore, which makes bauxite residue a suitable source for this element. Despite the scarcity and high cost of scandium ...

The present work shows the results of X-ray diffraction (XRD), Fourier transform infrared (FTIR), and thermal analysis of untreated (RMnt) and acid-treated red mud (RMa), a bauxite ore-processing waste, exchanged with Pb2+, Cd2+, and Zn2+ cations. These studies were performed in order to investigate the changes in the sorbent …

A bauxite residue typically contains 15–25% of alumina depending on the origin of its ore and process conditions. Along with alumina, it also contains iron, titanium and rare earth elements ...

April 2022. This Guidance explores and explains the sustainable management of bauxite residue. Bauxite residue – also known as 'red mud' – is produced when extracting …

1. Introduction. Bauxite residue and its appropriate management is of increasing environmental concern. As the global demand for aluminium metal continues in transportation, packaging and construction, from the fabrication of fuselages and car parts to disposable containers and various consumer durables, the legacy of nearly 120 years …

The bauxite ore residue used in this study was a byproduct of the Bayer process. The main compositions of bauxite ore residue sample and the non-magnetic material prepared by reductive roasting-magnetic separation process of bauxite ore residue are shown in Table 1.The reductive roasting and magnetic separation process …

and is mainly extracted from Bauxite ore.[1] Bauxites are composed mostly of alumina hydrate minerals and, in a lesser amount, hydrated aluminum silicate, iron, and titanium minerals.[2] The common industrial way to produce alumina is the well-known Bayer process,[3] in which large amounts of a residue, called bauxite residue (BR), are …

Bauxite residue (or filtered red mud) is a by-product of alumina refining from bauxite ore. It poses problems for the alumina industry due to the huge volume of the residue accumulated (2.7 billion tonnes) [ 7 ] and volume produced …

As a major byproduct generated in the alumina industry, bauxite ore residue is an important reserve of scandium and titanium. In this study, the feasibility and mechanism of enriching Sc 2 O 3 and TiO 2 from a non-magnetic material, which was obtained from carbothermal reductive roasting and magnetic separation of bauxite ore …

Bauxite residue (red mud) is an alkaline waste derived from the industrial process for extraction of alumina from bauxite ore. Some bauxite residues contain considerable concentrations of critical ...

Bauxite residues are solid–solution mixtures ranging in initial solids content from 20% to 80% by weight (depending on the disposal method of the refinery) …

Bauxite residue, also known as red mud, is an abundant by-product produced during the alumina production process from bauxite ore. As the demand for eco-friendly construction materials grows, researchers are exploring the potential of bauxite residue as a binding agent in cementitious composites. This review article aims to …

b. Production of bauxite residue The amount of bauxite residue produced by an alumina plant or refinery is primarily dependent on the sources of the bauxite and secondarily on the extraction conditions used by the plant. In the extreme, this can vary from 0.3 to as high as 2.5 tonnes of residue per tonne of alumina produced, though typically

Aluminum demand has increased with modernization of our society. As the primary source of aluminum is bauxite ore, this has resulted in more accumulation of bauxite residue. A bauxite residue typically contains 15–25% of alumina depending on the origin of its ore and process conditions. Along with alumina, it also contains iron, titanium …

Alumina is the feedstock to produce aluminum and is mainly extracted from Bauxite ore.[] Bauxites are composed mostly of alumina hydrate minerals and, in a lesser amount, hydrated aluminum silicate, iron, and titanium minerals.[] The common industrial way to produce alumina is the well-known Bayer process,[] in which large amounts of a …

One of the factors that affect the composition of the bauxite residue is the type of the ore. Bauxite ores can be classified into three categories based on host-rock lithology. They are the lateritic bauxites (88 %), the karst bauxites (11.5 %), and the Tikhvin-type bauxites (0.5 %) [24, 25]. Bauxite deposits lying on carbonates are classified ...