process of continuous sedimentation. It is employed mainly in design calculations to determine the required thickener area, the most important design parameter, and ultimately the maximum steady state underflow concentration that is possible for a given solids throughput. In …
thickeners, design seems to fall into a spectrum of options. Conventional thickeners were dev eloped following the pioneering wor k by Hazen ... continuous test results, ...
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...
1-11-1996· In accordance with that deduced previously (Font, 1988, 1990) and considering the material bal- ances, for a characteristic line of a specific volume fraction solids ~b~z in Fig. 3(a), the corresponding parameters of the design of a continuous thickener that has a volume fraction of solids equal to ~b~2 in the Continuous thickeners from semi-batch sedimentation tests 5009 BATCH TEST LI : nt ta ...
1-1-1993· SIMULATION OF BATCH AND CONTINUOUS THICKENERS R. FONT and F. RUIZ Departamento de Ingenieria Quimica, Universidad de Alicante, Apartado 99, Alicante, Spain (Received tO March 1992; accepted for publication 22 September 1992) Abstract The design of continuous thickeners from batch tests is considered on the basis of numerical simulations corresponding to both …
Thickeners vary widely in size and configuration, but they all comprise: a. a vessel to provide volume and area needed for thickening, with the area being large enough to allow the solids to settle at a velocity faster than the upward velocity of the liquid; b. a system for introducing the feed and directing it into the flow paths that best utilize the vessel volume and area; c. an overflow ...
1-11-1996· In accordance with that deduced previously (Font, 1988, 1990) and considering the material bal- ances, for a characteristic line of a specific volume fraction solids ~b~z in Fig. 3(a), the corresponding parameters of the design of a continuous thickener that has a volume fraction of solids equal to ~b~2 in the Continuous thickeners from semi-batch sedimentation tests 5009 BATCH TEST LI : nt ta ...
the process of thickening, two types of continuous thickeners may be used: Laboratory columns varying from 0.5 - 2 ft. in diameter, and pilot plant thickeners, usually with diameters greater than 5 ft. Both types attempt to portray the real operation and therefore should have the same height as standard tanks. 1-3 Thickening of Non-flocculent ...
Thickeners vary widely in size and configuration, but they all comprise: a. a vessel to provide volume and area needed for thickening, with the area being large enough to allow the solids to settle at a velocity faster than the upward velocity of the liquid; b. a system for introducing the feed and directing it into the flow paths that best utilize the vessel volume and area; c. an overflow ...
Likewise, thickeners are often used for storage to facilitate the continuous feeding of downstream filters or centrifuges. Historically thickeners were introduced to the mining industry in 1905 when the beneficiation of ores by froth flotation was invented in Australia.
Limiting Operating Conditions for Continuous Thickeners. 2017/03/20· [Show abstract] [Hide abstract] ABSTRACT: The design of continuous thickeners from batch tests is considered on the basis of numerical simulations corresponding to both operations. The method proposed in other ...
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.
Thickeners Design Calculation Pdf. Thickener design 911 metallurgist thickener design a continuous thickener is to be designed to deal with the effluent from the last question it will treat calculate tcu from operating data and draw a tangent to batch flux curve to give 0075 vv which converts to 019 by get price
Thickeners, equipped with the patented spiral scrapers and angle rakes are a distinct improvement over all types of mechanical raking devices now in use. Specifications and thickener rake design All Thickeners have the same general specifications, varying only as to type of machine.
Drive heads for both bridge and column type thickeners may be driven by up to 4 electric motors of hi-slip design which can reach 5-8 percent slip without loss of power nor overheating. This special design is required to ensure that the load on the main gear is balanced so that each primary reducer, and subsequently the entire reduction train, is subjected to an equal strain.
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 ...
Limiting Operating Conditions for Continuous Thickeners. 2017/03/20· [Show abstract] [Hide abstract] ABSTRACT: The design of continuous thickeners from batch tests is considered on the basis of numerical simulations corresponding to both operations. The method proposed in other ...
Likewise, thickeners are often used for storage to facilitate the continuous feeding of downstream filters or centrifuges. Historically thickeners were introduced to the mining industry in 1905 when the beneficiation of ores by froth flotation was invented in Australia.
Further development of software for the design and simulation of industrial thickeners Article (PDF Available) in Chemical Engineering Journal 111(2):135-144 · August 2005 with 326 Reads
Thickeners – PROC/ES – Norman B. Keevil Institute of Mining …. Thickening is the most widely applied dewatering technique in mineral processing, and is a relatively cheap, …Thickeners may be batch or continuous units, … »More detailed
Equations On Continuous Thickeners. The equations governing consolidation in a continuous-flow gravity thickener are developed based on the assumption that a flocculated suspension possesses a compressive yield stress P y (ϕ) that is a function of local volume fraction only. These equations are used to model the steady state operation of a ...
13-9-2013· be batch or continuous units, and consist of rela- tively shallow tanks from which the clear liquid is taken off at the top, and the thickened suspen-
continuous improvements for thickener and clarifier designs. Feedwell technology, feed dilution systems E-Volute™ The EIMCO E-Volute feedwell is our latest evolution of feedwell design. With its patent-pending, advanced involute design, E-Volute evenly distributes feed within the thickener and minimises flocculant shearing.
Drive heads for both bridge and column type thickeners may be driven by up to 4 electric motors of hi-slip design which can reach 5-8 percent slip without loss of power nor overheating. This special design is required to ensure that the load on the main gear is balanced so that each primary reducer, and subsequently the entire reduction train, is subjected to an equal strain.
The high time for thickeners was in the 60's when the metallurgical industries were booming and sizes of up to 150 m diameter were constructed. Such jumbo thickeners, when centrally driven, require for most demanding applications extra heavy duty drive heads some of which reach a continuous operating torque of 3.300.000 Nm.
Continuous thickeners have undergone several modifications that have resulted from the development of a wide variety of organic polymeric flocculants. As a result, there are now two basic types of continuous thickeners: Conventional and High-rate. Conventional Thickeners These thickeners differ in the way they are built.
