thickener operation flocculant application
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thickener operation flocculant application

Beginners guide to thickeners - Outotec

The operation of the thickener must accommodate fluctuations – control for disturbances – in the process feed stream to deliver a clear overflow and thickened underflow. This control is achieved by manipulating both the flocculant addition and the rate of underflow withdrawal (typically pumping). The flocculant addition should be adjusted ...

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(PDF) THICKENER DESIGN, CONTROL AND

Thickener control strategies and shortcomings in current thickener operations are discussed, including the strengths and weaknesses of the given field instrument options and their application in ...

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Tailings Thickeners, Supplementary Control for

We can also determine when flocculant dosing has failed. Setting problems occur within the Thickener when Ore bodies are changed in the process. One of the biggest problems to an efficiently operating Tailings Thickener is the lack of automatically dosing the flocculant, to

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Outotec Thickening technologies

2017-2-6 · flocculant are added, provides enhanced mixing and energy dissipation. This maximizes flocculant adsorption, eliminates the possibility of coarse/fines segregation and ensures all particles are aggregated together by the flocculant. Efficient operation is

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Most common problems in thickener operations (part 1)

Thickener area. The thickener area depends on the mineral sedimentation rate (m2/t/d) or the specific feed rate (t/h/m2) which are determined by laboratory or pilot testing. These tests are carried out with representative samples of mineral and different granulometry. The tests also evaluate different dosages of flocculant.

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Thickening - Resource Book

2015-8-13 · • Demonstrate an understanding of Thickener operation and operator control ... underflow solids density, underflow withdrawal rate, flocculant dosage, solids inventory in the tank, solids feed rate, and mechanical torque limit restriction of rotating rake arm ... application, usually having two long rakes with an option for two short rake arms.

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(PDF) Understanding the Thickening Process

the operation of the thickener is limited by permeability alone in that any enhancement in the permeability of 6 Paste 2006, Limerick, Ireland Understanding the Thickening Process B.J. Gladman, et al.

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Thickener optimization to reduce production costs ...

Thickener optimization to reduce your production costs ... Promass F 200 or Dosimass coriolis flow meter doses flocculant in relation to bed mass. ... The underflow density is important in maintaining stable operation and avoiding tailings block in the thickener discharge outlet.

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Optimise your thickener efficiency for maximum ...

Energy and flocculant costs is a major contributor to process costs. ... producing a stream of clarified water from the top of the thickener overflow and a thick sludge of settled solids (underflow) from the bottom. ... This more straightforward measurement principle offers a greater ease of operation.

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Flocculants and Rheology Modifiers for Paste Thickening ...

2012-7-22 · ° Deep thickener D is flocculated using a blend of DRYFLOC D and an anionic polymer. As can be seen from the graph, the mud pumped from D Deep thickener exhibits a significantly lower yield stress than the mud pumped from A Deep thickener. Thus the application of DRYFLOC D in combination with our trial thickener polymer has enabled the plant:

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Thickener - an overview | ScienceDirect Topics

The control parameters used to maintain stable operation in high-rate thickeners are underflow solids density, underflow withdrawal rate, flocculant dosage, solids inventory in the tank, solids feed rate, and mechanical torque limit restriction of the rotating rake arm mechanism. Lower-yield stress muds, as produced in a high-rate thickener ...

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Case Study: Thickening solutions - Outotec

2017-6-14 · Application: Mineral sands Project: Thickener feedwell retrofit Solution: TM Vane Feedwell Results: Project delivered on time, on budget Increased underflow density by 2% Reduced flocculant costs by 20% Increased water recovery More stable thickener operation Case Study: Thickening solutions Vane Feedwell™ – significant

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THICKENERS AND CLARIFIERS

2020-10-26 · Thickener experience, Roytec is privately owned by ... improve Thickener operation, reduce flocculant usage, achieve high underflow densities, improve overflow quality and allow ... Roytec has a wealth of thickening application knowledge and we partner with clients to ensure the best fit solution.

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Flocculants and tailings – Process productivity

The yield stress obtained from a thickener (and hence where you are on such curves) depends on the thickener type (dimensions, rakes and rake drive), operating conditions (bed height, throughput) and the aggregation state. For the latter, the curve is always pushed left to lower solids, as represented by ‘Flocculant 1’ for typical operation.

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Thickeners | McLanahan

Thickeners. Thickeners — or Clarifiers, depending on the application — can be used to recover immediately reusable process water, as well as extract fines and other materials. Thickeners are used by mineral and aggregate producers, as well as by environmental contractors in industries such as wastewater management, to separate solids from liquid in a slurry.

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DEBOTTLENECKING OF THICKENERS IN A CHANGING

2017-6-14 · rates (tph or m3/hr) per square meter of thickener surface area. For existing thickeners, these two parameters are effectively predetermined as the available surface area depends on the thickener’s diameter. Hence, while better control and operation is able to improve the average performance of an existing thickener,

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Thickener optimization to reduce production costs ...

Thickener optimization to reduce your production costs ... Promass F 200 or Dosimass coriolis flow meter doses flocculant in relation to bed mass. ... The underflow density is important in maintaining stable operation and avoiding tailings block in the thickener discharge outlet.

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ThickenerDesignandControl.pdf - See discussions

operate. In cases where flocculant might be exorbitantly expensive or deleterious to the downstream process, the conventional thickener remains as a viable option. As an example of a conventional thickener, Taggart (1945) records the Mt Lyell copper concentrate thickener as being 6 metres diameter by 3 metres high, and processing 150 ton per day to give a solids flux rating of 0.2 t/m2/h.

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TRAINING OUTOTEC THICKENERS

2020-2-11 · the type of application, ore, flocculant and duty of the thickener, will bring our customer’s the best results. OUTOTEC® THICKENERS - TRAINING OUTLINE MODULE A Introduction INTRODUCTION & OPERATION • General safety procedures • Basic theory of dewatering and thickening • Types of thickeners & function

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Case Study: Thickening solutions - Outotec

2017-6-14 · Application: Mineral sands Project: Thickener feedwell retrofit Solution: TM Vane Feedwell Results: Project delivered on time, on budget Increased underflow density by 2% Reduced flocculant costs by 20% Increased water recovery More stable thickener operation Case Study: Thickening solutions Vane Feedwell™ – significant

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(PDF) Increasing efficiency of thickener operation in ...

Increasing efficiency of thickener operation in concentrate plant of iron ore mine using coagulation-flocculation Seyed Morteza Moosavirad1 1 Department of Mining Engineering, Higher Education Complex of Zarand, Zarand, Iran Original Article Abstract Thickener is a main and fundamental step in modern mining separation processes.

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Flocculants and tailings – Process productivity

The yield stress obtained from a thickener (and hence where you are on such curves) depends on the thickener type (dimensions, rakes and rake drive), operating conditions (bed height, throughput) and the aggregation state. For the latter, the curve is always pushed left to lower solids, as represented by ‘Flocculant 1’ for typical operation.

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THE DEAL WITH DILUTION - Outotec

2017-6-26 · In cases where thickener feed dilution is required, the slurry feed to the thickener is commonly diluted in the . thickener feed system. This improves both the mixing and contact of the solid particles with the flocculant in the thickener feed as contact and adsorption of those parti-cles is essential for flocculation to occur.

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TRAINING OUTOTEC THICKENERS

2020-2-11 · the type of application, ore, flocculant and duty of the thickener, will bring our customer’s the best results. OUTOTEC® THICKENERS - TRAINING OUTLINE MODULE A Introduction INTRODUCTION & OPERATION • General safety procedures • Basic theory of dewatering and thickening • Types of thickeners & function

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Research on Flocculating Agent in Operation of High ...

High efficient thickener is a widely used thickener, which is improved according to traditional thickener. After upgrading, this thickener is equipped with NC reagent feeder.Generally, the purpose of dosing is to improve water quality and accelerate flocculation efficiency, such as flocculating agent.

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process gold plant flocculant - aladine.be

Thickener Operation and Flocculant Application. Table of ContentsFloccule DestructionFlocculant DilutionFeed Solids At start-up, the relatively high level of feed solids, 17-20%, called for in design led to difficulties in achieving the degree of flocculation necessary to meet required settling rates.

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Thickener optimization to reduce production costs ...

Thickener optimization to reduce your production costs ... Promass F 200 or Dosimass coriolis flow meter doses flocculant in relation to bed mass. ... The underflow density is important in maintaining stable operation and avoiding tailings block in the thickener discharge outlet.

Read More

ThickenerDesignandControl.pdf - See discussions

operate. In cases where flocculant might be exorbitantly expensive or deleterious to the downstream process, the conventional thickener remains as a viable option. As an example of a conventional thickener, Taggart (1945) records the Mt Lyell copper concentrate thickener as being 6 metres diameter by 3 metres high, and processing 150 ton per day to give a solids flux rating of 0.2 t/m2/h.

Read More

THICKENER_图文_百度文库

2018-1-14 · Pilot Paste Thickener :Testing The following is an example of the application of a paste thickener to fine coal dewatering. In a coal preparation plant 260 mt/hr of fines (40 wt% less than 20 microns diameter) are thickened in a 35m diameter conventional thickener to 35 wt% which becomes the feed to a vacuum filter.

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