LABORATORY TESTING FOR DESIGN OF THICKENER CIRCUITS Joseph M. Keane K D Engineering Co., Inc. 1844 W. Grant Road, Suite 106 Tucson, Arizona 85745 Introduction Feed dilution or solids-liquid weight The English word "sedimentation" ratio is derived from the Latin verb "sedere" Size and shape of the particulate meaning to sink down.
An extension of a previous method for designing continuous thickeners is presented. The previous method was based on data obtained for batch testing, where the discontinuity heights corresponding to the supernatant-suspension and to the top of the sediment are known at different values of time.
Aug 23, 2019· Numerous methods have been employed to achieve reliable bed-level measurement, including bed pressure, ultrasonic, capacitance, nuclear, vibrating probes, divers, and floats (to name just a few). They are typically limited to measuring the level at one location in the thickener and they range from being very expensive to reasonably affordable.
Design Data For Thickener How to Size a Thickener - Mineral Processing & Metallurgy. Knowing how to size a thickener and determine the capacity required to handle a pre-determined tonnage of a certain pulp, by overflowing a clear solution and obtaining the desired pulp density of thickener discharge, depends upon the settling rate of that particular pulp.
Mar 28, 2017· Figure 2, below, shows computational fluid dynamics comparisons of feedwells and their impact on thickener distribution. To highlight the variables in designing a CCD circuit, we will consider different recovery estimates based on an ore leach followed by CCD. Table 1 outlines the base data for a three-stage CCD with high-rate thickeners.
using this new mathematical mode l to predict thickening behavior, design of thickeners as well as design for the thickening function of clarifiers can now be conducted on a wholly rational basis. The model can also be useful in predicting the impact of operational variations on the performance of existing thickeners and clarifiers.
Thickening or dewatering may be defined as the removal of a portion of the liquid from a pulp or slime made up of a mixture of finely divided solids and liquids. The early methods of thickening employed plain, flat-bottomed tanks into which the pulp was fed until the tank was full. The solids were then allowed to settle as long as required, the top liquid was decanted, the settled solids were ...
The cost-effectiveness of sludge thickening should be considered prior to treatment and/or disposal. 22.214.171.124 Capacity Thickener design should provide adequate capacity to meet peak demands. 126.96.36.199 Septicity Thickener design should provide means to prevent septicity during the thickening process.
specific design data. Gravity Flow Systems Southwest, Inc. accepts no responsibility for any operational or design data not submitted in writing directly from Gravity Flow Systems Southwest, Inc. Sludge Type 0.5-1.5% Average Volume Reduction 80% 70% 80% 65% 65% GFS LATERAL FLOW™ THICKENER PERFORMANCE STATISTICS Dripping Springs, Tx.
On the method of thickener area calculation based on the data of batch-settling test (Received 7 May 1985, accepted in evised form 3 October 1985) Nearly all of the current methods for the thickener area calculation stem from the work of Cot and Clevenger (1916).
stack drive design upto 40M diameter and above Peripheral Drive Unit Manual / semi-automatic / automatic rake lifting (Optional) Designs upto 30M diameter (Full Bridge) and ... CLARIFIERS & THICKENERS - SYSTEMS FOR EVERY NEED. Employs principle of Floating the solids to the tank surface by millions of tiny air bubbles, forming a
The authors review the literature and discuss the application of methods to the design of thickeners for ilocculated metallurgical pulps. The use and evaluation of flocculents is described. Experimental data show that design based upon laboratory settling data is acceptable. The economic aspect of design is also discussed. INTRODUCTION For many years there has been...
Ionic Lamella plate clarifier configuration ensures laminar flow conditions, which results in hydraulic uniformity and high effluent quality. It permits great reduction in the space needed for clarification equipment and allows the compact equipment to be located indoors if desired, or to be easily relocated at
ever, is not enough for sufficient thickening of mixed liquer having sludge volume index in the rage of 200-500 ml/gm. Thus, the calcula-tions of area requirements should not be based solely on clarification data. It seems obvious in the design of secondary clarifiers that their thickening function be evaluated in conjunction with their ...
A design method for thickeners and clarifiers known as the batch flux curve technique was developed over 20 years ago, but still is not well-known in design and operating circles. An informal survey of major clarifier and thickener manufacturers found that none of the firms surveyed use this method for sizing and maximizing operating conditions.
Knowing how to size a thickener and determine the capacity required to handle a pre-determined tonnage of a certain pulp, by overflowing a clear solution and obtaining the desired pulp density of thickener discharge, depends upon the settling rate of that particular pulp. The settling rate of any pulp is easily determined by simple laboratory tests such as outlined below: Laboratory Test ...
The AMIRA P266 'Improving Thickener Technology' series of projects has sought to provide a firm scientific basis for feedwell and thickener design, a requirement as pressures on water usage in the ...
Beginners Guide to Thickeners; Beginners Guide to Thickeners. Thickening is a process where a slurry or solid-liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water (or liquor in leaching processes).
1 Dynamic Modelling and Analysis of Sedimentation-Consolidation Model in a Paste Thickener Chee Keong Tan 1, Ridwan Setiawan 1, QingYang Lei, Jie Bao, Götz Bickert 2 1School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052 ([email protected]) 2GBL Process Pty Ltd, Federal, NSW, 2480 ([email protected]) ABSTRACT The introduction of paste thickener …
----- Case studies and generalized experiences will be discussed in detail to emphasize the numerous sludge treatment and disposal alternatives. Data will be presented to assist the design engineer in selecting the optimum unit processes for inclusion in a particular conceptual design.
Outotec® Thickening technologies Leading edge technologies for thickening and clarifying Outotec is a global leader in the design, fabrication and supply of thickening and clarifying solutions for the minerals industry. The revolutionary Outotec® High Rate Thickener has pioneered and redefined thickening and clarifying methods around the world.
HydroFlo LS Series Clarifiers come standard with a horizontal hopper bottom with integral sludge thickener. This design will break up compacted sludge and direct the sludge to the center discharge point. This design also allows for the maximum amount of sludge storage below the plates for a given height (three time as much as a cone bottom design).
Dec 20, 2013· Experimental determination of thickening parameters and instruments for their determination are presented. Old and new methods for thickening design are reviewed and software for the design and simulation of batch and continuous thickening are presented. Finally, strategies for the operation and control of industrial thickening are discussed.
Why McLanahan Thickeners? McLanahan offers a range of thickener types and scope of supply that is tailored to an individual application. Most (but not all) incorporate a low profile rake design with or without dewatering pickets.
Why McLanahan Paste Thickeners. McLanahan has provided Paste Thickeners both with and without pickets and rakes depending on the process outcomes sought by producers. By employing a series of proprietary design tools, McLanahan process engineers will test and design the Paste Thickener to achieve the appropriate value for each operation.
International Mining's monster April issue, including the annual paste supplement is now with the printer. One article for which there was insufficient space is by Outotec's Andrew McIntosh. He notes that "the sizing of equipment which achieves design requirements and is not conservatively oversized can influence both the financing of a project as well as its long term operational ...
MIP Thickener Design The following is a short cut to designing your own thickener: (a) Size of Thickener As a first stab we can either use the thickener flux (m. 2 /tpd) or the rise rate, depending if solids loading is the dominant (eg.
The design involves selecting a typical solids flux and calculating the required surface area by dividing the anticipated solids feed by the flux . Area of the thickener: 2. Design based on Iaboratory data First Approach: It is the best technique if the Iaboratory data is available. Typical test is done by using a 1000mL-graduated cylinder.
Water Research Pergamon Press 1972. Vol. 6, pp. 499-502. Printed in Great Britain STUDIES ON THE DESIGN DATA OF GRAVITY THICKENING K.-H. KALBSKOPF Emschergenossenschaft, D-43 Essen, FRG PHYSICAL processes are important for thickening.
offered to enhance performance of existing thickeners and clarifiers. tHiCkener design MIP Thickeners and Clarifiers are designed to operate continuously for 24 hours per day. Process selections are based on test work coupled with our vast experience in the field of thickening. It is our belief that a thickener should not be designed on the ...