Laboratory evaluation of electrokinetic dewatering of bauxite …
In this context, this study conducts electrokinetic dewatering tests on fine bauxite tailing, using samples with initial solid content by weight ranging from 20 to 30%; final values between 43 and ...
Dealkalization processes of bauxite residue: A comprehensive review
Generally, 1–2 tons of bauxite residue generated while producing 1 ton of alumina mainly depending on the bauxite quality and production process (Zhao et al., 2009; Jones et al., 2012; Deihimi et al., 2018; Borra et al., 2015).According to the statistics of the International Aluminium Institute (Aluminium, 2019), Fig. 1 illustrated the world alumina …
Statistical Modelling of Operating Parameters on …
for the complete optimization of the bauxite dewatering plant operating parameters, aiming to preserve its full pro-duction capacity after the modification of slurry top size and pH to mitigate pipeline metal thickness loss. The HBF operates continuously while filter cake is dis-charged onto conveyors through reciprocating knife gate
Bauxite Beneficiation Reject Dewatering and Disposal
This bauxite must be washed prior being fed in the refinery, and so, the beneficiation plant will dispose 3.0 million tons (dry basis) of bauxite reject. The moisture of this material, at the moment of disposal, may vary from 88% to 25%, depending on the dewatering method.
Optimization of fluoride removal using calcined bauxite: …
Geogenic contamination of groundwater due to elevated fluoride (F −) concentrations is a significant issue worldwide (including in Tanzania).The present study focussed to assess the adsorption capacity of thermally treated (calcined) bauxite to remove the F − from contaminated water. Characterization of bauxite by X-ray …
Decanter Centrifuge for Dewatering Bauxite Tailings
The equipment tested was the Decanter 620 MX-V2, supplied by Lindner Techno Systems LTDA, with a bowl diameter of 620 mm and 2.800 mm of length. The centrifuge parameters during the pilot test presented the best results were 1.500 G and a variation between 35 m 3 /h and 50 m 3 /h of volumetric feed rate.
Optimization of open-pit mine design and production …
Open-pit mining plans include implementing operations throughout the entire life of the mine. In addition to geometric and geotechnical constraints, it is important to ensure an uninterrupted ore feed by optimizing production plan. In order to achieve this and at the same time maximize the net present value, the most well-known method is "Parametric …
Statistical Modelling of Operating Parameters on …
These results were useful to complement those obtained in the laboratory for the complete optimization of the bauxite dewatering plant operating parameters, …
Microwave Dewatering of Gibbsite-Type Bauxite Ores: …
The thermal dewatering of bauxite ores mainly involves the removal of the loosely bound water at low temperatures, and this is followed by the more strongly bonded water as the temperature increases.
Performance Changes in Alunorte Bauxite Dewatering
The objective of this study is to evaluate the dewatering performance parameters and quality parameters of the bauxite that has been pumped since 2019, using historical …
A review of the characterization and revegetation of bauxite residues
Approximately 85 % of bauxite is converted to alumina (Al 2 O 3) for aluminum metal production (Liu et al. 2009), and the majority of bauxite ores are used for the production of alumina via the Bayer process.The Bayer process is the principal industrial means of refining gibbsite bauxite. Globally, more than 90 % of alumina is produced by …
(PDF) Laboratory Evaluation of Electrokinetic Dewatering of Bauxite …
Soils and Rocks, São Paulo, 38(2): 135-147, May-August, 2015. Laboratory Evaluation of Electrokinetic Dewatering of Bauxite Tailings in which z is the zeta potential in V (usually negative for clay soils), e is the soil electric permittivity (F/m in SI 2 units), m is the fluid viscosity (N.s /m in SI units) and n is the soil porosity.
Research progress in improving sludge dewaterability: …
Operational optimization of electrochemical dewatering. In addition to the mechanical dewatering operations such as pressure, processing time, and cake thickness, the performance of electrochemical dewatering is closely associated with electric field conditions including voltage and current (Bai et al., 2019; Zhang et al., 2022c).
Deep dewatering of bauxite residue via the synergy …
Polycarboxylate superplasticizer (PCE) significantly improved BR dewaterability and decreased the water content from 45.85% to 36.71% (2%) …
Statistical Modelling of Operating Parameters on Bauxite …
These results were useful to complement those obtained in the laboratory for the complete optimization of the bauxite dewatering plant operating parameters, aiming to preserve its full production capacity after the modification of slurry top size and pH to mitigate pipeline metal thickness loss.
Utilization of Decanter Centrifuge for Dewatering of …
Typically, bauxite beneficiation has the following steps [2]: Comminution for handling and exposure of clay minerals; Disaggregation of clay minerals with water; Separation of clay …
Bauxite Residue/Red Mud | SpringerLink
Dewatering options, filtration theory is described in detail and the benefits that can be achieved using various filter types. The management and storage of bauxite …
Optimization of iron and aluminum recovery in bauxite
Recovering iron and aluminum efficiently is the key route to utilize low-grade high-iron bauxite. Aiming to optimize the iron separating process and elevate both Fe and Al recovery ratio, three different Fe–Al recovery processes with different magnetic roasting (R), Bayer leaching process (L) and magnetic separation (S) orders were investigated. …
(PDF) Microwave Dewatering of Gibbsite-Type Bauxite Ores
The thermal dewatering of bauxite ores mainly involves the removal of the loosely bound water at low temperatures, and this is followed by the more strongly bonded water as the temperature increases.
Treatment of alumina refinery waste (red mud) through …
Satpathy BK, Chaddha MJ, Sharma RJ, et al. (2011) Preparation and characterization of bricks using bauxite residue- an innovative approach. In: International seminar on bauxite residue (ICSOBA -2011), Goa, 17–19 October 2011. International Committee for Study of Bauxite, Alumina and Aluminium, pp.227–234.
Deep dewatering of bauxite residue via the synergy of …
1. Introduction. Large amounts of bauxite residue (BR) are inevitably generated during alumina production, which must be disposed of in an economically and environmentally acceptable manner [1].It is estimated that 1–1.5 tons (t) of BR is generated when 1 t of alumina is produced [2], [3].The global BR reserves have exceeded 4.0 billion …
Application of skeleton builders to sludge dewatering and …
Over the last two decades, many researches have been conducted on technique development and mechanism probe of various sludge dewatering processes such as advanced oxidation, acid-base, flocculation-precipitation, electro-dewatering methods, and skeleton builder process (Fig. 1) (Beata and Jurand, 2021; Liu et al., …
BX03
Efforts to remove reactive silica from bauxite ore prior to shipment have largely focused on gravitational methods such as washing, screening and the use of hydrocyclones. The …
Critical review on dewatering of sewage sludge
The engineering implication of dewatering is extended from disposal to high-value sludge re-utilization. Through the review, we expect that sludge dewatering can be systematically and compendiously understood from fundamentals to implementations. 2. Water occurrence states in bio-flocs of sewage sludge
Research progress on desulfurization technology of high-sulfur bauxite
Results showed that when roasting at 650 °C for 120 s, the desulfurization efficiency was up to 76.98%, while the residual sulfur in the roasted ore was found to be 0.07%. HU et al [24] roasted high-sulfur bauxite ore at 600 °C for 60 min, and the dissolution test was performed at 240 °C and roasted for 60 min.
Toward sustainable green alumina production: A critical …
Bauxite distribution (a) Guinea [36] and (b) Australia [37]. ... resulting in the difficulty of mineral sorting in red mud and in the optimization of the agglomerate structure in the subsequent soilization process. The third problem is the resource utilization of red mud. Red mud has a low content of valuable elements and a complex structure ...
Statistical Modelling of Operating Parameters on …
for the complete optimization of the bauxite dewatering plant operating parameters, aiming to preserve its full pro-duction capacity after the modification of slurry top …
Technospheric Mining of Rare Earth Elements from Bauxite …
About 0.7–2 tons of bauxite residue is generated for each ton of alumina produced 11, and the annual global production of bauxite residue is about 140 million tons 12, while 2.7 × 10 9 tons ...
Article Microwave Dewatering of Gibbsite Type Bauxite …
Keywords: bauxite ore; dewatering; permittivities; strength indices; microwaves; heating; pisoids 1.Rhamdhani Introduction In the metallurgical industry, bauxite ores are the main source of alumina, which is the primary feedstock for aluminum production. The majority of the world's bauxite is
Deep Dewatering of Bauxite Residue via the synergy of …
Complex surface properties and high fineness of bauxite residue (BR) make it hard to compact and settle, which reduces the solid content of the BR cake and solid-liquid separation efficiency.
