A waste by product of the Bayer process for producing al oxide from the bauxite ore, red mud contains toxic heavy metals and its high alkalinity makes it extremely corrosive and damaging to soil and life forms, presenting a massive problem for disposal.
bayer process red mud disposal
Red mud removal requires the use of flocculants effective in bridging and entrapping fine red mud solids to rapidly separate the solids from the saturated liquor. This separation process occurs via decantation and subsequently in multiple counter current washing stages to reclaim soluble alumina and soda.
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A method of treating Bayer process red mud slurries to improve or facilitate the handling thereof, comprising adding to such a slurry a minor porportion of humic acids or humates effective to reduce the viscosity of the slurry.
Read "5607598 Treatment and disposal of red mud generated in the bayer process, Journal of Cleaner Production" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Bauxite(Residue(ValorisationandBest(Practices((|((Leuven(|((5 77/10/2015(355(IMPROVED EFFICIENCY! OF RED MUD PROCESSING THROUGHSCANDIUMOXIDERECOVERY !
A process for recovery of valuable products from Bayer process red mud comprises the steps: (a) digesting red mud with sulphur dioxide in the presence of water to dissolve soda, alumina and silica therein; (b) heating the product of step (a), with or without prior removal of insolubles, to selectively precipitate silica, and removing solids including the precipitated silica, to produce a ...
Red mud or bauxite residue is a solid waste generated from the Bayer process. The disposal of red mud leads to a serious environmental threat because of its tiny particle size and high alkaline value.
Jun 18, 2010· Karl Bayer's original patent suggests that the red mud residue could be used in the production of iron. However, so far, there have been very few successes in this endeavour. Currently, there are some initiatives to pursue the idea of exploiting red mud as a construction material for example (see ).
Disposal of aluminium industry waste, chiefly the bauxite residue called red mud is a worldwide concern. The high alkalinity of red mud and the presence of toxic materials in it pose a serious ecological hazard. Which is why the aluminium industry has been brainstorming to overcome the problem associated with red mud disposal. The remedies […]
Red mud or bauxite residue is a solid waste generated from the Bayer process. The disposal of red mud leads to a serious environmental threat because of its tiny particle size and high alkaline value. The utilisation and recycling of red mud is currently a crucial issue and needs to …
Red mud is the waste product generated by bayer's process in the aluminium industry. Extraction of aluminium from bauxite is called as bayer's process. Enormous quantity of red mud is generated worldwide every year posing a very serious environmental problem. Further, disposal of large quantities of red mud dumped, poses increasing problems of
The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer.Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al 2 O 3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be purified before it can be refined to ...
US6033579A - Red mud dewatering and washing process - FIELD OF THE INVENTION. The invention covers a process for filtration and washing of red mud, if applicable with addition of sand, in particular from the Bayer process for aluminum production from bauxite, in which filters are used and caustic is washed out on the filter.
Abstract – The Bayer Process for the production of alumina from Bauxite ore is characterized by low energy efficiency and it results in the production of significant amounts of dust like, high alkalinity bauxite residues known as red mud. Disposal of large quantities of red mud; a solid-waste generated at the Aluminum plants all over the ...
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