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tailing thickener bed level probe

Optimising performance of bed level thickeners PACEDec 19, 2008· When Endress+Hauser asked its mining customers about the major process problems they face, high on their priority list was the ability to accurately and reliably monitor the “bed level” and “bed mass” in the tailings thickening process and in the other

instrumentation and control of sedimentation equipmentthere is not a standard bed level sensor that we can recommend for all applications. ultrasonic bed level sensors work by sending a pulse down from just under the surface, which in the thickener supervisor monitors the performance of the thickeners in the tailings dewatering circuit and specifically controls polymer dosage and dischargeportable sludge blanket level detectordissolved air flotation (daf) tanks/thickeners (floating bed) sedimentation basins lagoons tailing ponds the sludge gun® is used wherever solids are separated from liquids. marklands popular sludge gun® portable sludge blanket level detector makes everyone an expert at sludge level interface detection.tailings thickeners hawk measurement systemslevel technology choice pressure transmitter, rake torque, sonar transmitter. tailings thickeners are extremely important, to the efficient operation of concentrators and coal preparation plants etc. tailings thickeners are used to settle out suspended solids and return the clear water back to the process. if the return water to the process has high suspended solids loading, then it can totally affect thickener design, control and developmentthickeners for tailings densificat ion need to suppliers need to take current thickener designs to the next level and into the 21st century. the thickening process is dominated by the bedthickener optimization to reduce production coststhickener optimization to reduce your production costs integrated online monitoring improves concentrator performance easy monitoring of data from all critical measuring points at a concentrator will help you increase plant availability, process safety and energy savings.beginners guide to thickeners outotecjun 16, 2017· beginners guide to thickeners. thickening is a process where a slurry or solidliquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water (or liquor in leaching processes). the driving force for the separation is gravitational, where the differences in phase densities drive theadvanced thickener control outotecjun 13, 2017· with pid loop control the thickener inventory can be controlled through feedback from either bed level or clarometer and flocculant dosing can be controlled against mass flow with feedback from bed level. by controlling flocculation and solids inventory, the thickening process is stabilized and consistent, optimum; underflow density can bef locculant m ixing systems thickening, filtering, ccdthat thickener was run with a very high and stable bed mass (those loops worked well) and at about 130% of design throughput (it is a supaflo hrt thickener "floc miser" feed well). any potential "pump wear" of a mono pump running on floc would be slow enough for the feedback loop to deal with.

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Advantages of tailing thickener bed level probe

thickener optimization to reduce production costsliquiline cm44x with up to 8 sensors (4 bed level+4 other) turbimax cus71d submersible ultrasonic level sensor with cleaning assembly. turbimax cus51d particle settling rate sensor. orbipac cpf81d ph sensor with cya 112 mounting assembly. indumax cls50d conductivity sensor for sulphuric acid concentration measurementthickener optimization to reduce production costsinstrumentation for level, pressure and flow. prosonic t fmu30 ultrasonic level sensor measures and controls the rake height. cerabar m monitors the rake torque. promass f 200 or dosimass coriolis flow meter doses flocculant in relation to bed mass. cerabar m pmc51 with retractable cleaning assembly monitors bed massstudies on parameter estimation and model predictiveapr 01, 2015· thickening by providing high volume of bed depth (which is the case for paste thickeners) is considered more economical than those require greater area with a rather swallow bed level (which is the case for conventional and high rate thickeners) . therefore, paste thickeners have attracted considerable attentions from the mineral processingcontrol strategies for thickeners rhosonicsmar 11, 2021· control actions for thickeners. there are different targets to optimize thickener performance an underflow density target is used to ensure optimum solids content in the tailings impoundment, and optimum water relcaim for the mill; a bed/mud level target is used to obtain optimum loading in the thickener without overloading the drive mechanism online bed height and solids concentration sensorthickeners are important units for water recovery in various industries. in this study, a semiindustrial pilot plant thickener similar to the tailing thickener of the sarcheshmeh copper mine was online bed height and solids concentration sensorthe use of intrusive conductivity probes is common practice in the field of mineral processing for monitoring the bed height in thickeners (taverra et al., 1998;vergouw et al., 2004; acuna et althickener optimization to reduce your production costsfor effective thickener control, six measurements are critical bed mass inventory, bed level, underflow density and flow, flocculent dosing and overflow clarity. instrumentation for analytical liquiline transmitter cm42 (2wire with 2 sensor input) or liquiline cm44x with up to 8 sensors (4 bedmudmax bedlevel monitoring systemmultiple sensors located in the active bedlevel area directly detect and accurately measure bed levels. with a simple design that attaches to the rake arm, this practical, longterm solution uses a series of pipemounted differentialpressure sensors that continuously measure and wirelessly transmit the drag forces of compacting solids as the rake arm moves through the beds operating zone.modernization of chinalco toromocho copper tailingsfigure 2 toromocho four tailings thickener underflow wt% solids, 23month trend improvement of the underflow wt% solids has been a focus of the plant. the approach used, was to increase the bed inventory in the thickener to give increased solids residence time. each thickener is equipped with two bed mass pressure gauges. one is located near the

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The case of tailing thickener bed level probe

optimising performance of bed level thickeners pacedec 19, 2008· when endress+hauser asked its mining customers about the major process problems they face, high on their priority list was the ability to accurately and reliably monitor the bed level and bed mass in the tailings thickening process and in the other thickening processes, because if these could be measured, the efficiency of the thickeners could be improved. the bed level is thethickener level controller sludge thickening, filteringthis probe was mounted 1/3 inwards point on the feedwell bridge and was stationary in the thickener bed being connected between the bridge and the rakes. as this was a tailing thickener with the rakes and the feedwell bridge being driven together from a motor/drive on the outside of the thickener. this was in the late 1990s, so about 15 years ago.pore connectivity and dewatering mechanism of tailings bedpaste and thickened tailings (ptt) technology can improve the utilization and management of tailings from processing plants. the pore size distribution (psd) and microstructure evolution affected by the rake shear in thickening tailings beds are essential to produce a highdensity tailings underflow. continuous thickening and computed tomography (ct) scanning tests were conducted to study the5 ways to measure bed level in thickeners precisionthe term bed level is widely used in the industry to refer to different settling phases in the thickener (figure 1). some people use this term to describe the mud level, others use it to refer to the interface level or layer. to avoid any confusion, this article will use the terms mud level and interface levelcommissioning and operational experience of a thickenedthe slurry density from the thickener was measured in a separate loop before the pumps. for the outgoing slurry, a sonarbased flow meter was found to be unreliable. the bed level was estimated with an acoustic pulsebased sensor and overflow water recovered was generally of very good quality with a suspended solids content well below 0.1 kg/m 3.a precise approachimproving the efficiency of the tailings thickener in coal prep plants using a hawk orca sonar transmitter to monitor the heavy compact bed level and the hindered interface layer provides online process feedback to the control room, programmable logic controller, etc, on how well the tailings thickener is operating.

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