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 ...
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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 ...
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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 …
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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.
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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.
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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 …
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ANDRITZ paste thickeners incorporate: • High side walls, steep tank floors and unique feedwell design to enhance settling and promote paste formation to maximize …
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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 …
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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 …
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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A key component of most thickener operations is the motion of a thickened sediment across the floor of the tank to an underflow, usually located centrally. In most conventional thickeners and in many high rate and paste thickeners, this transport is aided by a set of two or four rake arms (see the schematics in Fig. 1, Fig. 3).
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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 …
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The design of the thickener focuses on providing a high-density underflow while maintaining an acceptable overflow clarity. To that end, our spiral rake arm and blade assembly increases residence time for solids in the mud bed, which creates higher underflow density, as compared to a traditional rake arm.
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High Rate Thickeners. Previous Next. Field Proven. Zero Failures after 50 installations. ... Consistent and high-density underflow. Careful cone scraper design provides optimal "live" underflow pump feed. Feed Dilution and Froth Removal (FRAD). We have eradicated the guesswork out of feed dilution. Our dilution system used our Solvent ...
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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 ...
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Two full-radius rake arms and two half-radius rake arms, complete with a cone scraper & MechProTech high-efficiency constant velocity rakes. ... The HI-RATE THICKENER feed well height is adjustable to allow for control of the secondary dilution and levelling thereof so that there is even water flow over the total circumference of the feed well ...
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Conventional Thickeners are generally incorporated in heavy duty applications when the underflow density is high and substantial torques are required to convey the settled solids from the periphery to the central …
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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 …
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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 …
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to high- or ultrahigh-rate thickeners. The further enhance-ment of the underflow into largely nonsettling, nonsegregat-ing paste results in paste thickeners (deep-cone or deep-bed thickeners of same meaning according to different termino-logy used by manufacturers) [17–18], which are generally
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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 ...
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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, …
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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).
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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, …
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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 …
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