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Development of equipment for thickening bauxite pulp

Development Of Equipment For Thickening Bauxite Pulp

Apr 16, 2009 A new technology has been developed for the multi-stage leaching of bauxite. The method reduces unit heat consumption in the Bayer cycle by 1012 compared to the traditional one-stage scheme. The key piece of equipment needed to realize the method is a unit that can separate the solid and liquid phases under pressure and operate at high temperatures. Thus, it was decided to

IMPROVED THICKENER FOR RED MUD Peloquin G and

Improved Thickener For Red Mud Peloquin G And

slurry. This paper presents results obtained in the pilot thickener and in a plant thickener. 1. Introduction The economical thickening of red mud slurry always poses a challenge to the alumina industry. The ever-decreasing quality of world bauxite reserves brings about a challenge with larger tonnage of mud to be processed in plants.

Thickener EKCP

Thickener Ekcp

thickener tank EIMCO KCP Thickener tanks are constructed either from bolted steel welded or concrete. Most of the chemical process industries prefer the steel tanks construction since they may be elevated above ground level, allow inspection of the tanks floor for leakages and bring the underflow slurry pumps nearer to the outlet of the ...

Mineral Processing Solutions for Bauxite to Alumina

Mineral Processing Solutions For Bauxite To Alumina

Conversion processes from bauxite to alumina in a Bayer process undergo in a highly alkaline environment. Such extreme pH levels required specific chemistry to be able to function well in a Bayer process. Whether its for faster red mud settling in the settlers amp washers, higher solid content in classifying thickener underflow, or protecting

4 EXISTING WAGERUP REFINERY 41 ALUMINA

4 Existing Wagerup Refinery 41 Alumina

liquor. This is achieved using large clarification vessels mud thickeners, which allow the undissolved bauxite solids to settle out. These bauxite solids are then passed through a counter-current washing train mud washers using water to recover as much of the caustic as possible to enable it to be returned to the recycled caustic liquor ...

Bauxite ALS

Bauxite Als

Bauxite is a mixture of aluminium minerals, clay minerals, and insoluble materials. Three aluminium minerals can occur in ... in thickening tanks. The caustic soda is recovered by washing this bauxite residue red mud through several stages before the

Identification and Description of Mineral Processing

Identification And Description Of Mineral Processing

Free moisture in crude bauxite, as mined, may range from five to 30 percent. To produce dry bauxite , most of the free moisture is removed by heating crude bauxite in rotary drying kilns. Calcined bauxite is produced by heating bauxite to reduce total volatile matter, including chemically combined water, to less than one percent. Approximately

Extraction Process of Aluminium from Bauxite Ore

Extraction Process Of Aluminium From Bauxite Ore

Apr 11, 2016 Metallurgical ContentAlumina Extraction ProblemAluminum Extraction FlowsheetAluminum FactsFrom Bauxite to AluminiumThe Bayer ProcessHall or Heroult Process Aluminum is the most abundant metal in the earths crust and is a constituent of many minerals. However, the material which is highest in aluminum and most free from objectionable impurities is bauxite

PDF Understanding the Thickening Process

Pdf Understanding The Thickening Process

The thickening process is the primary method of producing high solids slurries for the minerals industry. Thickener outputs can accommodate a range of tailings disposal options from low yield ...

Clay Dewatering Clay Flocculation Settling Thickening

Clay Dewatering Clay Flocculation Settling Thickening

Apr 05, 2018 The thickener is funnel shaped the concentrated sludge is removed at a bottom outlet at a controlled rate to maintain the desired density. The flocculant used is a common one unnamed, which Gardinier intends to manufacture itself. Gardinier is building a large-scale test unit utilizing its process. Costing over 20 million, the system ...

CFD modeling of thickeners at Worsley Alumina Pty Ltd

Cfd Modeling Of Thickeners At Worsley Alumina Pty Ltd

Thickeners usually consist of a cylindrical feedwell surrounded concentrically by a large tank which forms the main body of the thickener. ... the bauxite ore is wet ground with hot caustic liquor ...

Canadian Experience in the Application of Paste and

Canadian Experience In The Application Of Paste And

Thickener operating experience has progressed over the years and in 1995 the existing thickener was replaced by an elevated Outokumpu 35 m diameter high rate thickener with 4 m vertical wall and open top. Zinc and copper concentrator tailings solids SG 3.1 are pumped to the thickener

Modern thickener machine for Sludge Separation

Modern Thickener Machine For Sludge Separation

Description of Center Drive Thickener NZ thickener is a center-drive thickener,which is a traditional thickening equipment with a history of earlier application. The thickener with a diameter less than 12m is of manual handle type, and thickeners with a diameter over 12m adopt electric handle devices.

A study of polyacrylate and hydroxamate codosing

A Study Of Polyacrylate And Hydroxamate Codosing

Apr 16, 2009 Typically, the bauxite residue is removed by solidliquid separation in gravity thickeners, utilising high molecular weight water-soluble synthetic polymers flocculants to accelerate the throughput of the residue material within the thickeners.

Bauxite Products TH

Bauxite Products Th

NK-PHPP Thickener. TH supplies a wide range of thickeners for separating solids from liquids using flocculation and sedimentation. These are designed to ensure effective phase separation in mining product treatment, aggregates and environmental processes. View product details

JANUARY 2020 Bauxite Residue BR produced by

January 2020 Bauxite Residue Br Produced By

Figure 3 Thickeners for bauxite residue slurry red mud washing and settling. Since caustic soda is a key input and cost within the extraction process, plants are always concerned to recover as much as possible for reuse within the Bay-er process. Therefore, the

AquaCycle thickener for recycling wash plant water CDE

Aquacycle Thickener For Recycling Wash Plant Water Cde

AquaCycle Thickener. Primary stage water treatment for sand amp aggregates, mining and CampD waste recycling. Request a callback. Maximum water recycling. Minimum space. Up to 90 water recycling with the smallest equipment footprint.

Use of dextran as a filtration aid for thickener overflow

Use Of Dextran As A Filtration Aid For Thickener Overflow

In the Bayer process for producing alumina from bauxite of the type wherein the bauxite is added to a caustic solution to produce a soluble aluminate solution and an insoluble red mud fraction which is then subjected to one or more separation steps to produce a thickener overflow which is then subjected to a Kelly Filter Press to polish the thickener overflow the improvement which comprises ...

US4226714A Thickener control system Google Patents

Us4226714a Thickener Control System Google Patents

The thickener controller adjusts the mass flow rate of the underflow in response to the influent mass flow signal. However, fluctuation of an interface level between clear and unclear areas of the thickener can effect flow rate adjustment. The purpose of such an override is correction for errors in the mass control signal as well as for changes ...

sales mineral machine slurry thickener for tailing used in

Sales Mineral Machine Slurry Thickener For Tailing Used In

Mining Used Thickener, ... Thickener used in the ore tailing dry discharge field with ... Mineral thickening equipment ,deep cone thickener u. XinHai. ... Function Gold Mineral Tailing ... 1 SetSets mining company bauxite ore ... Inquire Now high capacity dewatering thickener for mineral . ore thickener machine iron ore tailing ...

Exploitation of shear and compression rheology in disposal

Exploitation Of Shear And Compression Rheology In Disposal

Marunczyn M. and Laros T.J. 1992 Bauxite residue disposal at Alcoa of Australia using the EIMCO Hi-Density thickener. Proceedings of the International Bauxite Tailings Workshop Perth Western Australia Australia 314 Google Scholar

Aluminum processing Ores Britannica

Aluminum Processing Ores Britannica

Aluminum processing - Aluminum processing - Ores Aluminum is the third most abundant element on Earths surface. Only oxygen and silicon are more common. Earths crust to a depth of 16 km 10 miles contains 8 percent aluminum. Aluminum has a strong tendency to combine with other common elements and so rarely occurs in nature in the metallic form.

US Patent for Treatment of alkaline bauxite residue Patent

Us Patent For Treatment Of Alkaline Bauxite Residue Patent

Oct 27, 2020 A process is disclosed for treating a Bayer process waste comprising a slurry containing bauxite residue and dissolved aluminum. The process comprises supplying the waste to a settling area to cause the bauxite residue to settle out of the slurry, thereby producing a supernatant liquor. The process further comprises neutralizing the supernatant liquor with a solution containing magnesium

HiDensity Paste Thickener

Hidensity Paste Thickener

The HiDensity Thickener offers the advantages of paste and thickened tailings for very large tonnages. Water savings and tailings deposition can be accomplished with fewer tanks and at a lower capital cost than with the equivalent number of Deep Bed paste thickeners. ... Thickening Bauxite Tailings ...

Bauxite processing plants CDE Global

Bauxite Processing Plants Cde Global

Bauxite. Efficiently remove silica and clay from bauxite ore to improve final product quality. Through the introduction of a customised hydrocyclone configuration and our AquaCycle thickener technology we will

ARTICLE Addressing the Challenge of Bauxite Residue

Article Addressing The Challenge Of Bauxite Residue

Mar 11, 2019 The bauxite residue is thickened to a high-density slurry using an advanced thickener, flocculation, and dewatering filtration technologies. The thickened red mud slurry is pumped via pipeline to the storage area and spread in layers, allowing it to de-water through a combination of drainage and evaporative drying.

Management and use of bauxite residue

Management And Use Of Bauxite Residue

methods for thickening and washing of the residues prior to storage, and recovery of decant water during storage, have been developed to increase the recovery of valuable soda and alumina to the ... bauxite residue. BAUXITE.. MarchApril 2016. BAUXITE ...

Flocculants and tailings Process productivity

Flocculants And Tailings Process Productivity

Aug 05, 2020 Maximising thickener underflow solids concentrations. ... The best known example of flocculant choice impacting on overflow quality is in the flocculation of bauxite residue from the Bayer process. For some bauxites the use of flocculants with the hydroxamate functionality which favours interactions with iron oxide surfaces even in highly ...

BAUXITE RESIDUE SAFETY DISPOSAL AND FRIENDLY

Bauxite Residue Safety Disposal And Friendly

From the bauxite and red mud mineralogy, it can be concluded that Sierra Leone bauxite processing implies significant changes in the applied Bayer technology, namely improving bauxite preparation process at source, changing process parameters in milling, desilication and digestion stages, as well as in thickening steps,

AA01 The International Committee for Study of Bauxite

Aa01 The International Committee For Study Of Bauxite

are used to grind the bauxite. The bauxite is fed from the independent mass flow silo through an apron feeder and a belt conveyor to the feed hopper, where the SFL is mixed for wet grinding. Bauxite grinding is facilitated by 80 attrition and 20 impact in the rod mills. This is a wet, open circuit grinding.

BR2015Proceedings for Print copy Red Mud

Br2015proceedings For Print Copy Red Mud

BauxiteResidueValorisationandBestPracticesLeuven5 7710201561PROCESSOPTIONSFORTHEFILTRATIONANDWASHING OFBAUXITERESIDUE ReinhardBOTT1,ThomasLANGELOH ...

Bauxite filler for carpet backings Reynolds Metals Company

Bauxite Filler For Carpet Backings Reynolds Metals Company

Sep 30, 1999 A method according to claim 1, wherein the bauxite is Guyana bauxite or equivalent bauxite with 70-90 gibbsite content. 3. A method according to claim 1, wherein the pH of the naturally occurring bauxite ranges from about 4.5 to 8 when measured at 20 by weight mixture of bauxite in water at 20 to 25 C.

Thickening Bauxite Tailings

Thickening Bauxite Tailings

thickening of bauxite tailings for a solids throughput rate of 360 thr and a flow rate of 5,300 m3hr. The tailings particle size distribution was characterized as D40 minus 60 microns. The clients objective was to maximize water recovery at the plant and dispose of the tailings by stacking without a pond. The results of the testing defined the

US4830507A Method of and apparatus for thickening red

Us4830507a Method Of And Apparatus For Thickening Red

A method of and apparatus for the thickening of mud-like slurries produced during the course of industrial processes, e.g. the thickening of red muds produced during operation of the Bayer process for the production of alumina. The invention involves the step of feeding the slurry, a fluocculating agent and washing liquor to a deep thickening vessel having an underflow outlet for the thickened ...

Paste Thickener Design to Achieve Downstream Requirements

Paste Thickener Design To Achieve Downstream Requirements

This thickener design was accommodates the extreme feed variability of the tailings produced by the beneficiation plant. Bauxite Ore Case Study. The integration process for the paste system at a Brazilian bauxite ore plant identified the following high priority design parameters Greenfield project retaining dam to be constructed