thickener underflow maximum concentration g l

Underflow Solids Red Mud Thickener Feed Solids -

Hydrocyclone overflow and flotation unit underflow solids are removed in a high-rate thickener. The thickener also receives horizontal vacuum belt filtrate that is rich in fine solids. The thickener allows the solids to settle and produces a clarified water stream which can be recycled back to the plant.

CHAPTER 3 SLUDGE THICKENING - Marmara Üniversitesi

concentration (Co) and underflow solids concentration (Cu). This minimum flux is the maximum allowable solids loading for the thickener to work successfully.

thickening-basics.pdf | Chemistry | Physical Sciences

Underflow Arrangements Concentrated solids are removed from the thickener by use of a centrifugal slurry pump. positive displacement pump or by gravity. at the maximum rate at which they will enter the thickener.T H I C K E N I N G Overflow Arrangements Clarified effluent typically is removed in a peripheral launder located inside or outside ...

maximum thickness of sludge thickening -

Dynamic thickening is mainly used on lightweight, hydrophilic sludge: blanket is thicker, evenly spread and, consequently, floated sludge concentration is higher. . It is not always advisable to aim at maximum thickening because this could

Optimise your thickener efficiency for maximum profitability

The higher the density, the less process water is pumped out of the thickener's underflow. The optimisation of water content in the underflow allows for maximum recycling of process water while still keeping the underflow slurry sufficiently liquid to be managed by the underflow pump.

Paste Thickeners - Jacol

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.

On the control of sludge level and underflow concentration ...

Dynamic response: underflow concentartion From Figure 3, it can be seen that the level response has an integral characteristic, while the concentration has an over-damped response.

Thickener performance variability: underflow solids ...

Thickeners that are designed properly with sufficient contingencies and conservatism should be able to deliver the design target underflow solids concentration as an average figure over time, but nevertheless fluctuations of the thickener underflow solids and flowrate are inevitable.

On the control of sludge level and underflow concentration ...

The increase of capacity in many copper concentrators has lead to an increased effort for recovering the maximum amount of water in the solid-liquid separation process. Thickeners work continuously to produce a concentrated underflow and a water overflow free from particulate matter.

GRAVITY THICKENING OF ACTIVATED SLUDGE - UMass Amherst

18. Depth of Thickening Zone as a Function of Underflow Concentration and Suspended Solids Loading at 15.0°C 46 19. Depth of Thickening Zone as a Function of Underflow Concentration and Suspended Solids Loading at 10.0°C 47 20. Depth of Thickening Zone as a Function of Underflow Concentration and Suspended Solids Loading at 5.0°C 48 21.

Flocculants and Rheology Modifiers for Paste Thickening ...

the evolution of the yield stress vs. underflow solids concentration for the two deep thickeners operating in parallel. ° Deep thickener A is flocculated using a conventional high molecu-lar weight polymer. ° 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 ...

AMIT 145: Lesson 6 Dewatering & Clarification – Mining ...

Clarification (Thickeners) The principle objectives of a thickener are to: Clarify water for reuse in the plant; Thickening of the solids. To design a thickener we must know: Total feed volumetric and mass flow; Identity of unwanted solids in the overflow stream; Desired concentration of solids in the underflow stream.

thickener underflow maximum concentration gl

Through the online measurement of the thickener operation parameters including feed flow rate, mud bed level, underflow concentration,etc., an intelligent control strategy for thickener underflow and flocculant addition is proposed based on the mass balance model and expert rules.

Thickener Operation - Zeroday Enterprises

Thickeners are designed to operate continuously with slurry/water consistently flowing into the centerwell with thickener underflow pumping balanced to maintain a mud bed in the thickener. Key to thickener operational efficiency is the solids must be able to settle 2-4 times faster than the nominal water up flow rate.

high rate thickener for minning concentration

Wa Paste Thickener at the Water Corporation facility in Mundairing . and engineering thickeners since 1965 for a range of industrial and mining applications. . Increased flocculation efficiency is employed with a higher settling rate than . are capable of producing an underflow with maximum solids concentration. Chat Online

Thickening - Resource Book

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.

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On the Control of Sludge Level and Underflow Concentration ...

The pulp entering the thickener dilutes spontaneously to the conjugate concentration ' L by mixing with the water coming up through the settling material. This unique concentration depends on the ...

Development Of A New Gravity Sedimentation Process For ...

Periodically, the underflow rate is increased briefly to remove ad- ditional solids from the system at the concentration established by the (pre- viously set) low underflow rate. This mode of operation appears to make it possible to maintain the maximum solids concentration in the underflow.

On the control of sludge level and underflow concentration ...

Dynamic response: underflow concentartion From Figure 3, it can be seen that the level response has an integral characteristic, while the concentration has an over-damped response.

Selecting Thickener Depth Determination

It is expected that the feed rate could increase by as much as 20% for up to 10 hours and decrease by as much as 30% for up to 20 hours. The unit area for this thickener is 3.0 m²/mtpd, the average underflow concentration is 400 g/l and the limiting concentration is found by calculation or graphical methods to be approximately 200 g/l.

A description of the sedimentation process during dynamic ...

A description of the sedimentation process during dynamic thickener operation A.J. Vietti and F. Dunn 4 Paste 2014, Vancouver, Canada rise rate and the available side wall height of the containing tank.

Sedimentation: Tangent and Concentration Essay Example for ...

It is desired that the thicker underflow contain a concentration of 1050 g/L, attained using a feed rate of 50,000 L/day, and an underflow velocity of 3.472 mm/min. Using the Coe and Clevenger method, the area was calculated to be approximately 1.3112m2.

Improve Clarifier and Thickener Design and Operation

The objective is to determine the area of a thickener, the optimum underflow pumping rate, and the corresponding underflow concentration. The following data were taken: Q f = 177,600 kg/h; x f = 5 kg/m 3 ; and [density], p f =1,000 kg/m 3 .

Pulp, paste and putty: thickeners and flocculants for high ...

The cross-sectional area of a thickener, balanced by the slurry feed rate, determines the rise rate which is an important parameter in determining the clarity of the overflow. An inventory or depth of compressed pulp is maintained to reach the desired underflow pulp concentration. A thickener has several basic components: