Thickener

The thickener was applied at various concentrations (0, 4, 8, or 12 g/l) in the pretreatment bath to determine the effect of cationization on the optimal level of thickener. The concentrations of soda ash and urea in the pre-treatment were 40 and 100 g/l respectively.The fabrics, untreated cotton and cotton cationized with 100 g/l reactant, …

High-rate Thickener

EIMCO and Dorr-Oliver thickeners are available in both bridge-supported and column-supported designs. We offer beam- or truss-type bridges, depending on thickener diameter. In the bridge-supported design, suitable for thickeners up to 50 m in diameter, the drive is supported by the bridge, driving the rakes with a centre shaft.. Column …

thickener with ne scraper

High Rate Thickener Underflow Cone Scraper Highefficiency deepcone thickener is a new product used in the process of traditional thickeners The underflow concentration is up to 300800 g/L, and thickening tank and raketype mud scraper: The solid particles suspended in the thickener underflow cone scraper manufacturer thickener cone …

Thickeners — Types, Working Principle & Applications

In the 1980's, machines known as "high capacity" or "high rate" thickeners were introduced by various manufacturers. These machines are characterized by a reduction in unit area ...

Thickeners

Figure 18.5 depicts underflow produced by the thickener compared with the relative yield stress of the material. High-rate thickeners produce the lowest density and yield stress (<20 Pa). The highest yield …

SEPARATION RECOVERY OF HIGHLY CLARIFIED LIQUID

ANDRITZ paste thickeners incorporate: • High side walls, steep tank floors and unique feedwell design to enhance settling and promote paste formation to maximize …

HiFlo™ High-Rate Thickeners

PHOENIX HiFlo™ High Rate Thickeners clarify wash plant effluent water while thickening the slurry to 40-45% solids, greatly reducing the underflow slurry rate to the slurry pond. PHOENIX Thickeners use sedimentation …

The solids concentration distribution in the deep cone thickener…

The feed flux of lead/zinc tailings was 0.254 t·h−1· m−2 with a flocculant (high molecular weight anionic polyacrylamide) dose of 20 g/t. The thickened solids bed was sheared by a rotating rake at a rate of 0.2 rpm. The underflow was recirculated at a flux of 0.5 t·h−1·m−2, which can introduce additional shear stresses into the bed.

thickener with cone scraper

The Cone Scraper . Underflow Pumping. Pumping of dense underflows has always been a problem on thickeners that handle slurries such as metallurgical concentrates, potash or phosphate and the position of the pumps in relation to the discharge cone can be very critical. ... Jan 22, 2019· Deep cone thickener (DCT) is key equipment in cemented ...

Paste Thickeners

bed volume to produce high underflow densities. Over the years, this thickening technology has evolved and refined to consistently produce non-settling, non-segregating underflow. The improved underflow density can be in the range of 10 – 15 percentage points higher than underflow from a high-rate thickener.

Thickening

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 rotating rake arm ... cone is mounted directly below the feed well. The purpose of the distributor ...

(PDF) Understanding the Thickening Process

100 have been observed for selected materials in high rate thickeners. Whilst these ... with shapes ranging from a flat base to a deep cone thickener with a cone ... and thickener underflow pump ...

Thickeners and Clarifiers

Our uniquely designed clarifier/thickener provides maximum underflow density capability of up to 70% w/w solids content, and maximum flow capacity of up to 7000 GPM. ... Our all-steel high-rate thickeners utilize an elevated inclined floor fitted to a circular tank. Our thickeners are fitted with a proprietary designed feed-well and feed ...

AltaFlo™ Ultra High-Rate Thickeners

High underflow solids for reduced or eliminated slurry pond storage area. Low installed cost for minimal capital investment. Internal dilution and settling zone provides optimum, …

Effect of flocculant dosage on the settling properties and underflow …

A large volume of water is consumed during mineral separation. Reducing water consumption and improving water resource management are necessary to achieve environment-friendly development (Klemeš 2012).The dilute suspension is fed into the thickener to obtain high-concentration underflow under the effect of gravity and …

Sludge treatment − gravity thickening | Sludge Processing

Gravity thickeners generally retain 80−90% of the solids in the thickened product stream, depending on the sludge characteristics and the efficiency of the preceding conditioning stage. The sludge characteristics also govern the solids loading rate (SLR), which is the rate in kg/d at which the sludge dry solids enter the process per unit …

Proper thickener underflow densities

Proven thickeners that deliver desired underflow density Thickeners work on the operating principles of gravity and particle interactions, with solids settling downwards and liquids rising to the top as they separate. The design of the thickener focuses on providing a high-density underflow while maintaining an acceptable overflow clarity.

CCD and High-Density Thickeners-No-Brainer? A Doddle?

Paste and high density thickeners are designed to produce high underflow solids. By extension, the additional water removed from the underflow reports to the overflow. Hence, these thickeners ...

Deep Cone® Thickeners

somachineryhttps://somachinery/diefenbach-thickeners

Diefenbach Thickeners | Southern Machinery Company

WEBThese thickeners feature a fabricated sag steel floor on larger diameter tanks and provide open access under the tank for efficient underflow pumping. For …

CCD & High-Density Thickeners

Suspended Solids in Thickener Underflow 45 wt% Weight of Wash per Weight of Solids 2.5 ... Table 8 - CAPEX comparison of thickener costs High-Rate Deep Cone Diff. % Incr ) )

Constrained model predictive control of an industrial high-rate thickener

High-rate thickeners are used in the mining industry to improve water recovery from slurries and increase their solids ratio. High-rate thickeners operate under strict constraints and several disturbances. ... rake torque, and cone pressure as additional state variables. It takes feed slurry and flocculant flow rates as manipulated inputs and ...

AltaFlo™ Ultra High-Rate Thickeners

The PHOENIX AltaFlo™ Thickener is a rake-less thickener that provides ultra high-rate mixing, flocculation, and internal dilution followed by clarification and positive sludge collection and removal in a single tank. The Thickener's unique internal geometry, a deep sidewall and steep conical bottom provides underflow concentration comparable ...

The Development of Paste Thickening and Its Application to …

The development of paste thickening and high density technologies have changed the economics used in evaluating the benefits of increased thickener underflow density. This comes at a time of increasing competition for scarce water resources and a tightening regulatory framework in both water use and impoundment. These and other …

High Rate Thickeners

There are two basic types of high rate thickener units: Lamina or tube settlers and solids recirculation units Lamina Thickeners They contain space-cutting baffles that intercept settling paths at many …

High Rate Thickeners

The High-Rate thickeners became popular in the mid 1980's and are relatively newcomers to the sedimentation line of equipment. ... That the raking arms will not cause "doughnutting" of the settled solids while …

THICKENER DESIGN, CONTROL AND DEVELOPMENT

Like the High Rate thickener, ... flocculant dosage and flu x rate on thickener underflow and . ... Shahrebabak Copper Complex Deep Cone Thickeners." IMPC, 20 12, Paper 98.

Underflow concentration prediction based on improved …

In the practical thickener cone systems, the underflow concentration is hard to measure through physical sensors while there exist the high cost and significant measurement delay. This paper presents a novel and deeply efficient long short-time memory (DE-LSTM) method for concentration prediction in the deep cone thickener …

Thickener Spiral Rake Blade

We build our spiral rake assembly for thickeners in a high-strength tubular construction that in and of itself will enable an increase in underflow density of 2 to 3 wt%, compared …

Sizing and Operating Thickeners

Many thickeners are operated to give a constant underflow concentration using an underflow density gauge to control the underflow pumping rate. In this case, if the feed solids rate is increased from 10.0 to 11.9 metric tons/day, the operating point at steady-state moves from no. 1 to no. 6.

Thickener

EIMCO-K.C.P. High Rate Thickeners are designed to maximize the flocculation efficiency, self-dilution and settling rates. EIMCO-K.C.P. High rate thickeners are designed to provide high underflow concentration with smaller diameter. The high velocity feed is split to two compartments with opposite tangential inlets that are positioned in two ...

Clarifier

The recirculation may be either internal or external to the clarifier and often results in higher throughputs, albeit at the expense of greater mechanical complexity. By way of example, internal recirculation is used in the Eimco E-™ high-rate clarifier, which has a typical diameter between 4 and 12 m (see Figure 1.8).

DEWATERING * CONVENTIONAL AND HIGH-RATE THICKENERS

HIGH-RATE THICKENERS. ... The lower portion of the compaction zone is plowed by the rakes toward the discharge cone at the base of the thickener. When the thickener is operating properly and has an adequate depth of solids, the underflow density is high. The density (percent solids) of the thickener underflow is a good indicator of the balance ...

When To Use A High-Density Thickener

Underflow from a High-Rate Thickener will have a yield stress of 10-30 Pa and look like tomato ketchup, while underflow from a High-Density Thickener will have a yield stress of 30-100 Pa and resemble molasses. The Paste Thickener underflow will have a yield stress of 200-250 Pa and look like toothpaste. How to select a Thickener

DEWATERING * CONVENTIONAL AND HIGH-RATE …

The density of the thickener underflow is a good indicator of the balance between the feed rate and the discharge rate. A high density is achieved by allowing the sludge bed in the …

Theory and Application of Thickener Design

A thickener operating with such an underflow velocity should have an underflow concentration Cu as shown. By material balance, the underflow solids flux should be Gu as given ... ofthe rakes, particularly at relatively high underflow rates. This is sometimes attributed to rake action, but it can easily be shown (Hassett, 1958) by material ...

Review of Equipment for Mine Waste: From the conventional Thickener to

The high density underflow in the (HDT) thickeners beg an to replacing the conventional thickeners and HCT`s in the manag ement of mining waste, as treatment needs g rew with large m ineral ...