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Thickened tailings water balance dealing with excess water

The amount of water that comes mixed in the slurry exiting the thickener is usually reported as a fraction of the total weight of the slurry, we refer to this ratio as ‘solids content’ (Cw) where Cw = dry weight of solids/total weight of slurry. For a given slurry, the amount of water is dependent on the specific gravity (SG) of the tailings from one side and on the tailings tonnages produced from the other. Variation in

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Thickeners or thickener plants--optimizing the

2017-12-19  Advances in thickener design have improved the degree of separation possible from tailings streams, however limiting the selection criteria to just the thickener can constrain the operation potential. Integrating ancillaries, automation and operator

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Paste Thickener Design to Achieve Downstream

2021-6-19  Starting with the deposition design, pumping and pipe and thickener design were evaluated in an iterative fashion to design a system based on the same rheology. The thickening study identified significant variations in the particle size distribution

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Commissioning and Operational Experience of a

by mass of 70 % was considered sufficient for deposition at a slope of up to 3 %. The objective is to present and discuss the performance of the thickening, transportation and deposition systems during the commission stages and first years of operation.

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High Density Thickener – Amstar Corporation

Amstar’s high density 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. Reduced viscosity associated with the underflow concentrations of the high ...

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Perceived and realized benefits of paste and thickened ...

2013-1-21  Perceived and realized benefits of paste and thickened tailings for surface deposition ... stress of thickener underflow tailings and that of the material deposited at the TSF, as they can differ significantly as a ... density, high-rate, deep-cone, paste, etc.

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Film Deposition and Consolidation During Thin Glove ...

tial rapid rate of dry film build-up that decreased as dwell time increased, giving a departure from the t1/2 dependence. The departure was more apparent with the lower (50 wt %) TSC compounds and was evident with and without applying a correction for the thickness of the straight dip. The paper of Stewart14 contained a theoretical treatment of

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Automatic Control of High Efficiency Sludge Thickener

2021-5-18  Automatic control of high-efficiency sludge thickener. The automatic control of the thickener can improve the efficiency of concentration, ensure a higher underflow and a satisfactory overflow, and keep the underflow uniformly discharged. Main control items 1. The amount of flocculant added

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thickener mining tailing - triple-helix.co.za

Thickened tailings, as the name suggests, involves the mechanical process of dewatering low solids concentrated slurry (Fourie 2003). This is normally achieved by using compression (or high rate) thickeners or a combination of thickeners and filter presses. Inquire Now.

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Slurry flows in metallurgical process engineering ...

2014-6-5  = Flow velocity at the limit of solids deposition (m/s) V 50 = Flow speed in which 50% of solids are suspended by fluid (m/s) η = Coefficient of rigidity, or non-Newtonian viscosity, or plastic viscosity (Pas) ρ l = Density of the carrier liquid (kg/m 3) ρ l = Density of water (kg/m3) ρ m = Density of the mixture, or slurry (kg/m 3) ρ s

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High Density Thickener – Amstar Corporation

High Density Thickener Overview Amstar’s high density 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

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Thickening Bauxite Tailings

rate. The uniform drying is due to the angle of repose that the surface stack has which allows the rain water to leave the surface, as to not restrict the drying of the stack. Cracking begins days following the deposition. PasteThick™ Associates designed the paste thickener to produce underflow based on the identified limits of pumping

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Comparison of Carbopol 934 and 941 as Thickener on ...

2019-1-31  Aim: This study aimed to compare the diffusion rate of ketoconazole in microemulsion containing carbopol 934 or carbopol 941 as a thickener. Methods: Ketoconazole microemulsion was made into 7 formulas with various concentrations in each type of thickener, i.e 0.1%, 0.2%, 0.3%, and one formula without thickener.

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Perceived and realized benefits of paste and thickened ...

2013-1-21  Perceived and realized benefits of paste and thickened tailings for surface deposition ... stress of thickener underflow tailings and that of the material deposited at the TSF, as they can differ significantly as a ... density, high-rate, deep-cone, paste, etc.

More

thickener mining tailing - triple-helix.co.za

thickener for ores low price. How a Thickener Works 911 MetallurgistJul 13, 2016 . Power requirements are low, about ½ hp. for thickeners less than 50 ft. in diameter. .. the settling rate of ore ... Inquire Now; sale flotation separator for beneficiation SomSmi . Feeding Conveying.

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Solid Concentration - an overview ScienceDirect Topics

Results are usually expressed as a rate of deposition; e.g. μg SO 3 /cm 2 h. Deposition of sulphuric acid is rectilinearly dependent on time in the range 10 s to 120 min, and on velocity in the range 5 to 20 m/s. As the probe is of all-metal construction, it survives the rigorous conditions of plant testing, and is in routine use on large ...

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Thickener sizing and the importance of testwork ...

2010-3-23  Thickener sizing methods . Depending on the stage of the project, and whether or not samples of indicative feed material are available, a number of different methods can be used to determine thickener sizing. In general, these can be classified as: rule of thumb sizing, cylinder settling tests, and, lastly, dynamic thickener testwork.

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Case Study: Paste thickening optimises tailings

2015-7-30  The two high-rate thickeners operate as clarifiers, returning the bulk of the clarified water to the main plant at the combined hydraulic flow rate of 14,866 to 17,981 cubic metres per hour.

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Sedimentation - ScienceDirect

2019-1-1  In these circumstances, there will be a wide range of concentrations for which the constant rate sedimentation is followed by a period of falling rate. 8.2.4. The Thickener. The thickener is the industrial unit in which the concentration of a suspension is increased by sedimentation, with the formation of a clear liquid.

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Slurry flows in metallurgical process engineering ...

2014-6-5  Aalto University, P.O. BOX 11000, 00076 AALTO aalto.fi Abstract of master's thesis II Author Ville Roitto Title of thesis Slurry flows in metallurgical process engineering – Development of tools and guidelines Department Biotechnology and Chemical Technology Professorship Plant design Code of professorship KE-107

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Thickening Bauxite Tailings

rate. The uniform drying is due to the angle of repose that the surface stack has which allows the rain water to leave the surface, as to not restrict the drying of the stack. Cracking begins days following the deposition. PasteThick™ Associates designed the paste thickener to produce underflow based on the identified limits of pumping

More

STUDY OF DECOMPOSITION BEHAVIOUR OF BINDERS

2011-5-16  (2) Thickener: A thickener is used to increase the apparent viscosity of the processing system. e.g. an alkali-soluble, polyacrylate thickener is used as ceramic tile adhesive. (3) Suspension Aid: A binder may help to reduce settling of particles in a suspension. e.g. microgels are used during processing of aqueous alumina.

More

Perceived and realized benefits of paste and thickened ...

2013-1-21  Perceived and realized benefits of paste and thickened tailings for surface deposition ... stress of thickener underflow tailings and that of the material deposited at the TSF, as they can differ significantly as a ... density, high-rate, deep-cone, paste, etc.

More

Comparison of Carbopol 934 and 941 as Thickener on ...

2019-1-31  Aim: This study aimed to compare the diffusion rate of ketoconazole in microemulsion containing carbopol 934 or carbopol 941 as a thickener. Methods: Ketoconazole microemulsion was made into 7 formulas with various concentrations in each type of thickener, i.e 0.1%, 0.2%, 0.3%, and one formula without thickener.

More

Thickener sizing and the importance of testwork ...

2010-3-23  Thickener sizing methods . Depending on the stage of the project, and whether or not samples of indicative feed material are available, a number of different methods can be used to determine thickener sizing. In general, these can be classified as: rule of thumb sizing, cylinder settling tests, and, lastly, dynamic thickener testwork.

More

Paste Thickener Pilot

2020-9-17  Paste Thickener Pilot Pilot Plant The WesTech paste thickener pilot plant is designed to evaluate paste options by producing larger volumes of non-Newtonian underflow for use in proof-of-concept tests such as deposition or pumping studies. The paste thickener pilot plant is self-contained and includes: • Full electrical control panel

More

The effect of cation and organic addition on the settling ...

2009-11-20  deposition facility are the volume consumed by the slimes ... The settling rate during solid-liquid separation within a thickener is important as this influences the size of the thickener required and the rate at which water can be recycled back to the plant.

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Inorganic Thickeners - Attapulgite 20 Microns

Inorganic Thickeners – Attapulgite. Attapulgite, a naturally occurring mineral, is a crystalline hydrated magnesium alumino silicate with a three dimensional chain structure that gives it unique colloidal and sorptive properties. Fully hydrated attapulgite grades thickens liquids without swelling. Highly thermally activated grades combine ...

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Deposition techniques Sustainability Gold Fields

The spigot pipes are laid along the main wall, allowing deposition to occur from any point on the crest. In the course of a deposition cycle, a batch of adjacent spigots is opened, sufficient to cater for the slurry flow rate (Figure 1b). Spigots break up the tailings delivery stream into smaller streams, thus causing a drop in stream velocity.

More

Thickening Bauxite Tailings

rate. The uniform drying is due to the angle of repose that the surface stack has which allows the rain water to leave the surface, as to not restrict the drying of the stack. Cracking begins days following the deposition. PasteThick™ Associates designed the paste thickener to produce underflow based on the identified limits of pumping

More

THE EFFECTS OF FLOCCULANTS ON THICKENER SCALING

particularly in the more quiescent locations within the thickener. Another factor in scale formation is the rate of gibbsite deposition on the surfaces of the vessel. Some laboratory experiments were conducted to determine whether HXPAM's have any contribution to the deposition rate. In these experiments, samples of aluminate liquor were

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Development and Implementation of Thickened Tailings ...

2017-6-3  Deposition velocities were determined to be in the range of 1.5-2.0m/s. Deposition tests were conducted at densities of 68%, 72% and 75%. The test work indicated that a target density to achieve successful high density tailings pumping and deposition was in the order of 74-76% solids.

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The effect of cation and organic addition on the settling ...

2009-11-20  deposition facility are the volume consumed by the slimes ... The settling rate during solid-liquid separation within a thickener is important as this influences the size of the thickener required and the rate at which water can be recycled back to the plant.

More

Comparison of Carbopol 934 and 941 as Thickener on ...

2019-1-31  Aim: This study aimed to compare the diffusion rate of ketoconazole in microemulsion containing carbopol 934 or carbopol 941 as a thickener. Methods: Ketoconazole microemulsion was made into 7 formulas with various concentrations in each type of thickener, i.e 0.1%, 0.2%, 0.3%, and one formula without thickener.

More

Thickener sizing and the importance of testwork ...

2010-3-23  Thickener sizing methods . Depending on the stage of the project, and whether or not samples of indicative feed material are available, a number of different methods can be used to determine thickener sizing. In general, these can be classified as: rule of thumb sizing, cylinder settling tests, and, lastly, dynamic thickener testwork.

More

STUDY OF DECOMPOSITION BEHAVIOUR OF BINDERS

2011-5-16  (2) Thickener: A thickener is used to increase the apparent viscosity of the processing system. e.g. an alkali-soluble, polyacrylate thickener is used as ceramic tile adhesive. (3) Suspension Aid: A binder may help to reduce settling of particles in a suspension. e.g. microgels are used during processing of aqueous alumina.

More

Paste Thickener Pilot

2020-9-17  Paste Thickener Pilot Pilot Plant The WesTech paste thickener pilot plant is designed to evaluate paste options by producing larger volumes of non-Newtonian underflow for use in proof-of-concept tests such as deposition or pumping studies. The paste thickener pilot plant is self-contained and includes: • Full electrical control panel

More

Deposition techniques Sustainability Gold Fields

The spigot pipes are laid along the main wall, allowing deposition to occur from any point on the crest. In the course of a deposition cycle, a batch of adjacent spigots is opened, sufficient to cater for the slurry flow rate (Figure 1b). Spigots break up the tailings delivery stream into smaller streams, thus causing a drop in stream velocity.

More

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