Alunorte, which has been fined because of the red mud spill, is in dialogue with authorities as well as the local community about the incident, and also met local and regional media on April 30. The company has already increased the height of the drainage channel that was flooded in the unusually strong rainfall to prevent spillage from ...

ALUNORTE disposes of red mud residue by this dry-stacking method. This storage solution, however, is economically problematic due to the costs of construction and maintenance of the disposal structures and creates environmental problems for the storage sites, mainly due to the caustic nature of the mud, which could pose hazards to living ...

Alunorte's red mud spill happened after an unusually heavy and long rainfall in April 2009. At its most intense, the region had 105 millimeters of rain in just 90 minutes. The extreme rain made water containing red mud from the deposit seep into the Murucupi river. In 2010, Alunorte was fined nearly BRL 20 million after the spill, but has not ...

Let's talk about Red Mud (Bauxite Residue) Global annual production of red mud (bauxite residue) is about 150 million tonnes.It contains raw materials for the production of iron, silicon and aluminium, and is dumped as waste in spite of …

Summary This chapter contains sections titled: Introduction Alunorte's DRS Concept New Technology for Red Mud Filtration Residue Disposal Capabilities A New Technology for Dry Disposal of Alunorte's Bauxite Residue - Light Metals 2013 - Wiley Online Library

Dagens Næringsliv writes that the company was also issued a total prohibition against using their red mud dump. The Norwegian state owns 34% of shares in Hydro, which is one of Norway's largest companies. The same newspaper writes in another issue: Alunorte is a refinery for bauxite, the most important raw material needed for creating aluminum.

Studies at Alunorte indicate that compared to dry stacking technology, the benefits of dry disposal would be an increase of the red mud solids content …

[Using a Statistical Model in the Red Mud Filtration to Predict the Caustic Concentration in the Red Mud Borges A. and Aldi J. Alunorte Light Metals 2009, pp. 117–119] The effect of rotational speed. The capacity of a trough-feed rotary vacuum filter is a bit less than proportional to the square root of the speed. So, doubling the speed (×2 ...

The red mud disaster in Hungary strength-ened the belief that better management of solid residue from alumina refineries is a ... Alunorte, with a production of 6.3 million tpy is the world's largest alumina refinery. The nearby CAP project, although recently post-poned, foresees the construction of a similar

2018 and OP authorizes the operation of the aluminum refinery and the red mud deposit DRS1. Following a massive rainfall event on February 16-17, 2018, which caused floods in the region of Barcarena, there have been allegations that effluent from Alunorte's red mud deposits had spilled to

Table 1 Annual output of red mud in some countries (mt/year) China Australia Brazil India Russia America Canada 105.16 28.00 10.60 10.00 3.78 2.24 2.10 1 (2011~2018)[11]

This study was conducted at the Alumina do Norte do Brasil S.A (ALUNORTE) alumina plant, located in Pará, Brazil, in one of the six filters at the plant. Results show that the condensate is the primary factor in caustic red mud concentrations, followed …

Hydro Alunorte currently uses vacuum drum filters for red mud filtration and Giulini dry stacking technology for residue storage. Studies have been completed and Hydro is now implementing new technology with a new filtration plant using fast opening filter presses and changing to dry residue storage. The new system, now under construction, will ...

The red mud wash water consumption will be reduced from 5.5 ton/ton mud to 3 ton/ton mud, with just loss of 0.001 to 0.005 tonne caustic / tonne alumina. 3. Conclusions . Energy consumption in both digestion and evaporation will change when the molar ratio is adjusted and the evaporation economy is improved.

2 million m 3 of mud, containing water and clay ("red mud") the mud flow left about 4000 residents of the cities of Miraí and Muriaé in the Zona da Mata homeless. Crops and pastures were destroyed and the water supply was compromised in cities in the states of Minas Gerais and Rio de Janeiro. 2006, Nov. 6 Nchanga, Chingola, Zambia

red mud is to discharge it into deposit lakes constructed for this purpose. An alternative method, which has environmental advantages, is to pump back the sludge in order to recover and reuse the caustic solution. In older installations, however, this is usually not done for reasons of cost. Only the Alumar

To produce alumina with high quality, competitive costs and high efficiency on caustic recover with low flocculant consumption has been a challenge for the filtration area in Alunorte. This area has 3 chains each with 5 washers for 7 production lines where together, handles about 4,4 Mtpy of red mud. Specifically at production lines 6 & 7, the washer chain has only high rate settlers …

Alunorte (Brazil), Distomon (Greece), Gardanne, Kwinana, Seydisehir (Turkey) and many plants in China have already adopted or plan to adopt plate and frame filter ... of caustic red mud slurry inundated the village of Kolontar and flowed into the Torna Creek, Marcal and Raba rivers had a significant effect on the alumina

2.1 Red mud The alkaline red mud used in this study has been obtained from Alunorte S.A. plant (Pará-Brazil). Freshly samples had pH 11.0 and the microanalysis revealed its principal chemical components as Fe 2O 3 (45.8%), Al 2O 3 (19.8%), Na 2O (10.8%), SiO 2 (29.28%), TiO 2 (5.9%) and traces of CaO. The BET method indicated that the

Figure 1. Red Mud Vacuum Filter at Alunorte As mentioned earlier, the refinery has been expanded three times since starting production. Consequently there are four trains of red mud washing. The first two trains have conventional CCD washers and the last two trains have more modern Alcan deep CCD washers which produce the higher underflow ...

Alunorte, which has been fined because of the red mud spill, is in dialogue with authorities as well as the local community about the incident, and also met local and regional media on April 30. The company has already increased the height of the drainage channel that was flooded in the unusually strong rainfall to prevent spillage from occurring in the future.