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Clarification & Settling

The first stage of clarification is to separate the solids (bauxite residue) from the pregnant liquor (sodium aluminate remains in solution) via sedimentation. Chemical additives (flocculants) are added to assist the sedimentation process. The bauxite residue sinks to the bottom of the settling tanks, then is transferred to the washing tanks, where it undergoes a series of washing stages to recover the caustic soda (which is reused in the digestion process).

Further separation of the pregnant liquor from the bauxite residue is performed utilising a series of security filters. The purpose of the security filters is to ensure that the final product is not contaminated with impurities present in the residue.

Depending on the requirements of the residue storage facility, further thickening, filtration and/or neutralisation stages are employed prior to it being pumped to the bauxite residue disposal area.

Our Offerings

KREBS® millMAX-e Slurry

We have optimised the millMAX design to bring increased wear life and higher efficiency to your plant processing application with our millMAX-e Slurry Pump.
 
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PIACS® DC4 Controller

With PIACS® DC4 Controller we increase the efficiency of dust particles removal from flue gas of your electrostatic precipitator
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KREBS® gravelMAX™ slurry and dredge pump

The gravelMAX design features a wider, larger diameter impeller and a large cutwater clearance that increases the maximum passing size. Excellent for dredge, aggregate and coal applications.
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Essa® Pulverising Mills

Without good sample preparation, laboratory analysis is wasted. Correct preparation is critical to obtaining appropriate and correct results. Essa® Ring Mills are built for high productivity and long lifespans allowing you to produce accurate and reliable results for your laboratory – day in, day out.
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KREBS® slurryMAX™ Pump

We designed the slurryMAX Pump to replace less efficient pumps easily and safely, providing you with significant water savings, less downtime and better energy efficiency
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Mobile Insights App

Bring the control room with you with the FLSmidth SiteConnect Mobile Insights App that provides real-time access to equipment health and performance data, wherever and whenever you need it.
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Essa® Sample Dosing Units

With limited operator intervention required, our dosing units eliminate errors and variations in dosing and weighing, improving the precision and reliability of your sampling.
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Press filters

Get simple and reliable dewatering with the Shriver® Filter Press
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Ball mill for cement grinding

A ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering. It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell.
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SAG Mill

Your operation requires cutting-edge solutions with high throughput to enhance productivity and profits. We have designed our AG and SAG Mills with your specific needs in mind. Our team of highly-skilled engineers continually upgrades designs for the consistently most cost effective and robust AG and SAG Mill solutions for your operating needs.
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Hi-Chrome Wear Segments

High quality. Re-usable. Recyclable. Hi-Chrome Wear Segments offer a long-lasting, flexible, and environmentally-friendly wear solution for our vertical roller mills.
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OK™ Pro+ Ceramic Wear Segments

Our best-in-class OK™ Mills  for raw materials, cement and slag grinding deserve a best-in-class wear liner solution. Our OK Pro+ ceramic wear segments take care of that. By eliminating the risks posed by ill-fitting or substandard third-party solutions, our OK Pro+ wear segments help make sure mill performance continues to meet original specifications.
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OK™ Raw and Cement Mill

Our best-in-class OK™ Mill is a globally successful vertical roller mill solution for grinding raw material, cement and slag. Its cutting-edge design features consistently deliver the highest quality ...
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KREBS® Ball-Check Valves

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AFT® filter bags

At FLSmidth, we help customers in the cement, minerals, power and metals industries control air pollution and emissions. How? By providing long-lasting industrial filter bags. Your baghouse will collect dust efficiently when using our baghouse filter bags that meet environmental regulation standards.
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Electrostatic precipitators (ESP)

Engineered to deliver efficient dust emission control down to 5mg/Nm3, our ESP solutions are not just successful, they are not affordable, offering the lowest total cost of ownership. With more than 4,000 ESPs installed in a wide range of industries and applications, we offer bespoke solutions for every application.
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LUDODECK® Polyurethane Tension Mats

For greater screening accuracy and a longer life, choose LUDODECK® Polyurethane Tension Mats, custom designed to suit your operations.
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LUDODECK® Polyurethane Tension Mats

For greater screening accuracy and a longer life, choose LUDODECK® Polyurethane Tension Mats, custom designed to suit your operations.
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KREBS® Technequip® TG Knife Gate Slurry Valve

Your harsh operating conditions are a breeze for our TG knife gate slurry valve. This heavy-duty, bi-directional slurry valve has a full flanged body with massive rubber sleeves that provide you with a reliable seal.
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KREBS® TGW Knife Gate Slurry Valve

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LUDODECK® PIPO™ Two Perforated Plate Panels

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KREBS® Vacuum Breaker Valve

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KREBS® slurryMAX™ XD Split-case Slurry Pumps

The slurryMAX XD has found success all over the world, in the most aggressive applications, for more than a decade. Extremely thick elastomer liners and a heavy-duty impeller provide this pump with ...

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KREBS® millMAX™ slurry pumps

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KREBS® UMD™ Ultimate Mill Discharge Pump

Our KREBS UMD™ centrifugal slurry pump is the most advanced heavy-duty slurry pump available for mill discharge applications. Optimized hydraulic design delivers the highest efficiency and even wear.
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