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Bauxite residue issues: III. Alkalinity and associated ...

A detailed understanding of the complex buffering and neutralization chemistry of bauxite residue remains the key to improved management, both in terms of reduced environmental impact for current storage practices, legacy costs and for the utilization of the material as an industrial by-product for other applications.

Vedanta signs MoU with research institutes for value ...

Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is …

Bauxite residue issues: III. Alkalinity and associated ...

A detailed understanding of the complex buffering and neutralization chemistry of bauxite residue remains the key to improved management, both in terms of reduced environmental impact for current storage practices, legacy costs and for the utilization of the …

Red mud - Wikipedia

Red mud, formally termed bauxite residue, is an industrial waste generated during the processing of bauxite into alumina using the Bayer process.It is composed of various oxide compounds, including the iron oxides which give its red colour. Over 95% of the alumina produced globally is through the Bayer process; for every tonne of alumina produced, approximately 1 to 1.5 tonnes of red mud are ...

Vedanta signs MoU with research institutes for value ...

New Delhi, April 12 Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is a by-product generated during processing of bauxite into alumina using the Bayer process.. Bauxite is the primary ore for aluminium, that undergoes an intermediate refining stage to …

Experimental Simulation of Long Term Weathering in ...

Understanding how tailings materials weather into soils over extended timescales ... Bauxite residue is an alkaline, saline-sodic byproduct of the Bayer process for alumina refining. Most

Shifts in leaf N:P stoichiometry during rehabilitation in ...

Global production of bauxite residue during extraction of alumina from bauxite ore approximates 120 million tons every year 1.Rehabilitation of …

Alkaline Bauxite Residue Slurries | Producing Electrolytic ...

Bauxite residue is produced as a byproduct of the Bayer process, an alkaline leaching process taking place at temperatures 120–250°C. Therefore, the present process has great potential for integration in the established Bayer process as a symbiotic step to valorise the (currently wasted) iron portion of …

Vedanta signs MoU with research institutes to explore ways ...

Anil Agarwal-led Vedanta Ltd has signed a memorandum of understanding (MoU) with research institutes in India for exploring ways to create value from bauxite residue for further usage in the company's downstream segment. "We are focussing on implementing new-age solutions for efficient waste management and creation of circular economy," said Rahul Sharma, deputy CEO, Aluminium, …

Vedanta signs MoU with research institutes for value ...

Rahul Sharma, Dy. CEO Vedanta . Mumbai: Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is a by-product generated during processing of bauxite into alumina using the Bayer process.

Proposal for management and alkalinity transformation of ...

A detailed understanding of the chemistry of bauxite residue remains the key to improving its management, both in terms of minimizing environmental impacts and reducing its alkaline properties. The nature of bauxite residue and the chemistry required for its transformation are still poorly understood.

Modelling Hydrological Performance of a Bauxite Residue ...

This study showed that the HYDRUS model can be used as a predictive tool to precisely estimate the moisture profile of the bauxite residue and that the timing for the re-deposition of the bauxite residue can be estimated by understanding the moisture profile and desired shear strength of the residue.

Vedanta signs MoU with research institutes for value ...

NEW DELHI: Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is a ...

The dynamic development of bacterial community following ...

The results have demonstrated that natural weathering processes improved the soil development on the abandoned bauxite residue disposal areas, which also increased our understanding of the correlation between microbial variation and residue properties during natural weathering processes in Bauxite residue disposal areas.

Transforming Bauxite Residue from Waste to Resource ...

Through company-driven research and global partnerships, Alcoa is making strides in finding reuse opportunities for bauxite residue, a byproduct of the alumina refining process. Alcoa has a goal to reduce bauxite residue land requirements per metric ton of alumina produced by 15 percent by 2030, from a 2015 baseline. A key driver in achieving the goal is finding reuse opportunities for …

Extraction of rare earths from bauxite residue – European ...

Bauxite residue (also called red mud) is a solid waste formed during the production of alumina in the Bayer process. It has been estimated that about 140-150 million tonnes of bauxite residue are generated every year and, approximately 4 billion tonnes of this material have been already stockpiled during the last decades.

A review of the characterization and revegetation of ...

Bauxite residue (Red mud) is produced in alumina plants by the Bayer process in which Al-containing minerals are dissolved in hot NaOH. The global residue inventory reached an estimated 3.5 billion tons in 2014, increasing by approximately 120 million tons per annum. The appropriate management of bauxite residue is becoming a global environmental concern following …

Characterization of Untreated and Neutralized Bauxite ...

Alumina refineries generate large volumes of bauxite residue daily, and as such, the storage, treatment, and reuse practices for residue are receiving increasing attention as refineries strive to reduce the potential environmental impact of their operations. To improve management decisions in the selection of appropriate storage, treatment, and reuse practices, the leaching behavior of bauxite ...

Bauxite waste management » AlSiCal

Alumina originates from mined bauxite ore refining and is mainly produced via the Bayer process, which also leads to generation of bauxite residue. For every tonne of aluminium, approximately 1.6 up to 3.0 tonnes of bauxite residue is generated depending on the content and composition of the starting material.

Properties and Assessment of Applications of Red Mud ...

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 traditionally hindered due to the extreme alkalinity ...

Physical, chemical, and surface charge properties of ...

12%A detailed understanding of the composition, buffering capacity, surface charge property, and metals leaching behavior of bauxite residue is the key to improved management, both in reducing the environmental impact and using the material as an industrial by-product for other applications. In this study, physical, chemical, and surface charge properties of …

Vedanta signs MoU with research institutes for value ...

Bhubaneswar: Vedanta, India's largest producer of aluminium and its value-added products,has signed a memorandum of understanding (MoU) with research institutes for value-creation from bauxite residue (red mud), which is a by-product generated during processing of bauxite into alumina using the Bayer process. Bauxite is the primary ore for aluminium, that undergoes an …

Bauxite Residue In Australia - World Aluminium

Bauxite residue, sometimes referred to as 'red mud', is the by-product of the Bayer process – an industrial chemical process for refining aluminium-containing ores in alumina (aluminium oxide), the raw material used to produce aluminium metal.

Vedanta signs MoU with research institutes for value ...

New Delhi, 12 th April 2021: Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is a by-product generated during processing of bauxite into alumina using the Bayer process.Bauxite is the primary ore for aluminium, that undergoes an intermediate refining …

Phosphogypsum stabilization of bauxite residue: Conversion ...

The SEM image of bauxite residue (0.1–0.5 mm) illustrated particles were dispersed and of variable shapes (Fig. 5a). The raw sample included amorphous substances and these particles were of variable size. With the application of phosphogypsum, the loose particles disappeared and the aggregate particles were of uniform distribution (Fig. 5b).

A database for dealing with bauxite residue - Chemical ...

Bauxite residue (red mud) is generated as a by-product during the processing of alumina (the feedstock for aluminum production) from bauxite ores. With no successful large-scale commercial uses found thus far, the majority of the residue produced continuously during the 117-year-long history of the alumina industry has ended up stored on land ...

Vedanta signs MoU for reuse of bauxite residue - The Hindu ...

Vedanta, one of the largest producers of aluminium and its value-added products, has signed a memorandum of understanding for value-creation from bauxite residue (red mud), which is …

Bauxite residue uses: successes, failures and

16 Scale of the problem • Alumina production in 2015 was 115 million t/y - 95% via Bayer process • Bauxite residue produced per tonne of alumina –range 0.5 to 4 t/t alumina • Annual arising –over 155 million tonnes and growing • Number of active alumina refineries –about 80 • Number of closed residue disposal sites –over 50 • All disposal in estuaries and the sea ceased at ...

bauxite residue - sources of technology & market report

Bauxite residue, also referred to as 'red mud',is the by-product of the Bayer process – an industrial chemical process for refining aluminum-containing ores in alumina, the raw material used to produce aluminum metal. The properties of bauxite residues are determined by the type of …

Vedanta signs MoU with research institutes for value ...

Vedanta, India's largest producer of aluminium and its value-added products, has signed a memorandum of understanding (MoU) for value-creation from bauxite residue (red mud), which is a by-product generated during processing of bauxite into alumina using the Bayer process.

UNDERSTANDING THE HYDROGEOLOGY OF BAUXITE RESIDUE …

understanding the hydrogeology of bauxite residue disposal areas at the worsley alumina refinery, collie, western australia Wright, R.F., Davidge, S.C., Speechly, A.M., Johnston, P.B. Detailed hydrogeological characterisation of a bauxite residue disposal area (BRDA) at Worsley Alumina's Collie Refinery has been used to support closure design ...

TITLE: suggestion Understanding the Hydrogeology of ...

UNDERSTANDING THE HYDROGEOLOGY OF BAUXITE RESIDUE DISPOSAL AREAS AT THE WORSLEY ALUMINA REFINERY, COLLIE, WESTERN AUSTRALIA R. F. Wright, S. C. Davidge, A. M. Speechly, P. B. Johnston 1. INTRODUCTION 1. General Worsley Alumina Pty Ltd (WAPL) has bauxite mining and refining operations in the Darling Range, near Collie, Western Australia.

TECHNOLOGY ROADMAP MAXIMISING THE USE OF BAUXITE …

As alumina production increases so too will the production of bauxite residue (BR), which is generated by the extraction of alumina from bauxite during the Bayer process. The composition of BR is dictated by the bauxite source and the extraction conditions. Further infor-mation is available in Appendix A.