high rate thickener flocculant feed pipe
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high rate thickener flocculant feed pipe

Thickening - Resource Book

High Rate Thickeners High rate thickeners are designed specifically to maximise the flocculation efficiency of flocculants. They differ from conventional thickeners in feed well design, size and control. Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener is below.

High Rate Thickener - Metso Outotec

This maximizes flocculant adsorption, eliminates the possibility of coarse/fines segregation, and ensures all particles are aggregated by the flocculant. Efficient operation is maintained in this upper zone over varying feed rates. The lower zone promotes gentle mixing for continued aggregate growth, with the option for secondary flocculant dosing.

(PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT

demonstrate the likely effects of feed rate, flocculant dosage and flu x rate on thickener underflow and . ... Figure 3 Forced-dilution devices on the feed line to a 42 m high rate thickener.

HIGH RATE THICKENERS - McNally Sayaji

The key advantages of a High Rate Thickener over a conventional thickener are as follows: Some of key features of the MBE High Rate Thickener are • The HRT is designed specificallyto operate with flocculantsand hence optimises flocculant consumption. • The HRT has a special “ McTurbo“ feed well design combined with automatic feed

High Capacity Thickener

Jan 12, 2019  A high dilution of the flocculant was found to be unnecessary, due, apparently, to the rapid rate of blending with the slurry. Reagent concentrations of 0.1 to 0.25% were normal, and in some cases, using water emulsion reagents, solution concentrations as high as 5% could be used.

High Capacity Thickeners / Clarifiers Enviro-Clear ...

Enviro-Clear - Manufacturer of clarifiers, thickeners, horizontal belt vacuum filters, pronto pressure filters, linear screens, and replacement drives. High capacity, high rate, and conventional thickeners / clarifiers provided for liquid solid separation for mining, chemical processing and industrial applications.

Thickener Operation - Zeroday Enterprises

Jan 26, 2015  High feed solids recoveries reporting to the bottom of the thickener ensures high solids recovery and high overflow clarity levels. Modern thickeners are designed based on use of highly effective synthetic (polyacrylamide) flocculants, ensuring high solids capture and adequate settling rates.

High Rate Thickeners - Solid Liquid Separation

The Feed Pipe. Thickeners are almost always operating on slurries in the 3rd category of mass subsidence and hindered settling so high feed solids concentration yields slow settling rates and vice versa. On the other hand slurries in the 1st category of free and unhindered settling exhibit high settling rates of the solids in the suspension.

MIP Process Corporation USA Products Servicves ...

During thickener operation, feed enters the feedwell, via a feed pipe or open launder. In order to promote settling, it is increasing to dissipate this energy. In some cases, flocculants or coagulants are added to the feed to agglomerate particles and improve settling. Feed dilution may also take place.

High Capacity Thickener

Jan 12, 2019  A high dilution of the flocculant was found to be unnecessary, due, apparently, to the rapid rate of blending with the slurry. Reagent concentrations of 0.1 to 0.25% were normal, and in some cases, using water emulsion reagents, solution concentrations as high

Difference Between Clarifier and Thickener

Nov 19, 2020  High rate thickeners; HOW THICKENERS WORK. Feed enters the velocity break box where excess energy is removed from the slurry prior to entering the Thickener feed pipe. Flocculant is added into the feed pipe and mixes with the solids, forming larger agglomerations, that will rapidly settle to the bottom of the Thickener.

(PDF) Metalliferous Mining -Processing Juan Giglio ...

Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener is below.High rate thickener feed wells are designed to disperse flocculants thoroughly into the feed end to admit the flocculated slurry into the settling zone of the thickener without destruction of the newly formed floccules.

Thickeners and clarifiers Complete range of reliable and ...

High-rate thickeners are designed to provide roughly 12 times ... The bridge supports the feed pipe or feed open launder. At the tank perimeter, the full-radius rake ... Low operating costs, low flocculant consumption High-density thickeners By adding depth and torque to a high-rate design, high-density ...

High rate thickener HR-THK - ANDRITZ

High-rate thickener ANDRITZ process engineering will determine the optimum percentage of feed solids for the specific application during laboratory or pilot plant test work. The optimum percentage of feed solids will ensure proper flocculation and achievement of maximum fluxes (t/m 2 /d).

Beginners guide to thickeners - Metso Outotec

Jun 16, 2017  Feedwells and flocculant dosing control have a significant influence on thickener performance. Flocculation is controlled by varying the flocculant pump speed to achieve a consistent flocculant dosage rate per ton of dry solids feed. Care should be taken to ensure that flocculant dilution is maintained with changes in flocculant dosing rate.

Outotec Thickening technologies

settling, high rate thickening and/or clarifying, high compression and also paste thickening. A feed rate of 1-8m3/h (4.4-35.2 US gpm) of pulp is required for the pilot plant thickener/clarifier. Testing is required for the selection of correct thickener or clarifier size and configuration for each customer’s application.

Uses and Benefits of Flow Measurement in the Operation

independent variables such as flocculant rate, underflow flow-rate, and feed rate. Figure 3 Common thickener configuration with independent and dependent variables Thickener feed Thickeners are commonly fed from a distribution tank. The line that feeds the thickener often has a slight incline and the flow is driven by gravity.

(PDF) Optimising Flocculation and Thickener Performance ...

The aggregate structure at high flocculant dosage was ... of the feed rate to 650 m 3 h-1 sees the ... and involve broad shear rate distributions. The use of a linear pipe reactor provides ...

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 ...

Thickeners and Clarifiers - TAKRAF GmbH

With units of up to 100 m in diameter having been installed, the benefits of our DELKOR conventional, high-rate, high-density and paste thickeners include their low capital cost, smaller footprint, effective use of flocculants and advanced automation.

Thickeners – MIP Process Technologies (Pty) Ltd

During thickener operation, feed enters the feedwell, via a feed pipe or open launder. In order to promote settling, it is increasing to dissipate this energy. In some cases, flocculants or coagulants are added to the feed to agglomerate particles and improve settling. Feed dilution may also take place.

MIP Process Technologies Thickening and Clarification

Thickener Operation During thickener operation, feed enters the feedwell, via a feed pipe or open launder. In order to promote settling, it is increasing to dissipate this energy. In some cases, flocculants or coagulants are added to the feed to agglomerate particles and improve settling. Feed

THICKENER PERFORMANCE OPTIMIZED WITH UPGRADE,

Due to high feed velocities, air entrainment in ... with the residual flocculant in the thickener liquor and settle. This option was considered favourably due to ... The feed pipe sat relatively close to the thickener surface, with a flange in the feed pipe, with ~20 mm clearance from top of liquor. Ultimately, four booms

THE DEAL WITH DILUTION - Outotec

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

Instrumentation and Control of Sedimentation Equipment

Flow rate Flow rates for feed and underflow lines are usefull, particularly when combined with density measurements in order to generate solids mass flow rates. Since flocculant is usually dosed on a solids mass basis, knowing the mass flow rate is very useful for flocculant control, providing a

(PDF) Optimising Flocculation and Thickener Performance ...

The aggregate structure at high flocculant dosage was ... of the feed rate to 650 m 3 h-1 sees the ... and involve broad shear rate distributions. The use of a linear pipe reactor provides ...

Thickeners

•the Thickener feed pipe. Flocculant is added into the feed pipe and mixes with the solids, forming larger agglomerations, that will rapidly settle to the •bottom of the Thickener. The feed well is oversized allowing entrapped air, contained within the feed slurry, to rise and dissipate so it does not enter the main settling zone within ...

Magra - Global leader in High-Rate Thickeners

GLOBAL LEADER IN HIGH-RATE THICKENERS. 100+ times smaller footprint with comparable flocculant consumption to conventional rake thickeners and no moving parts. Feed densities up to 55 % discharging underflow at 70 % (solution could be halved) – no other thickener can compare.

Thickener Startup Shutdown Procedure

Mar 17, 2017  Flocculant is added to the thickener feed pipe. The operator must adjust the addition rates to give optimum solid settling with minimum flocculant consumption. Flocculant must also be used to give a clear overflow from the thickener. The thickener should be run to give 60% solids or as high an underflow density as can conventionally be achieved.

MIP Process Technologies Thickening and Clarification

Thickener Operation During thickener operation, feed enters the feedwell, via a feed pipe or open launder. In order to promote settling, it is increasing to dissipate this energy. In some cases, flocculants or coagulants are added to the feed to agglomerate particles and improve settling. Feed

Thickening and clarifying - FLSmidth

Poor solid-liquid separation functions can threaten the overall performance of your processing plant. With our efficient feed dilution and flocculation technology, we provide superior thickening performance in the form of better overflow clarity and higher underflow densities, while minimising your operating expenses.

High Density red mud residue thickeners - ScienceDirect

Nov 01, 1991  This is high rate thickeners for example. slurry, either by regulating a variable usually done by limit switches operated speed drive on the underflow pump or by a sliding shaft on the worm gear. thickener underflows resulting from Letter from Australia flocculated pulps. ... flocculant pipes to a point closer to designed high density ...

US4226714A - Thickener control system - Google Patents

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 in flocculant feed rate. This invention can be adapted to operate a system containing multiple solid-liquid ...

Isodry™ Thickeners Reliable Tailings Management Weir ...

Isodry™ thickeners are available as part of a wide range of solutions, from standalone units up to full solutions with hydrocyclones, filter presses and decanter centrifuges. Intelligent automation can be added to optimise the thickener’s performance in applications with a variable feed solid percentage and variable flow rate.

Thickener performance optimized with upgrade, service and ...

Jul 16, 2019  The feed pipe sat relatively close to the thickener surface, with a flange in the feed pipe, with ~20 mm clearance from top of liquor. Ultimately, four booms had to be installed with allowances in one of the pieces of the ring to accommodate the feed pipe, without lowering the

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