Thickening
Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener is below. High rate thickener feed wells are designed to disperse flocculants thoroughly into the feed end to admit the flocculated slurry into the settling zone of the thickener without destruction of the newly formed floccules.
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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 ...
Thickeners Rev 2
thickeners. Thickener diameters up to 35 m are available with the rake mechanism supported off the bridge by structural steel at the tank walls. Wa design thickener tanks and walls for upset conditions where the tank is filled with a density of between 15% and 45% solids above the normal underflow concentration as demanded by the …
Proper thickener underflow densities
Proven thickeners that deliver desired underflow density Thickeners work on the operating principles of gravity and particle interactions, with solids settling downwards and liquids rising to the top as they separate. The design of the thickener focuses on providing a high-density underflow while maintaining an acceptable overflow clarity.
Application of the FL Deep Cone Technology to the Fertilizer
These improve water recovery and minimize tailings impoundment requirements. High density thickeners can typically achieve 5 â€" 10 wt% higher underflow densities compared with a high rate thickener, achieving densities that can still be moved with centrifugal pumps and pumped to the tailings impoundment without …
Thickener parts
Instruments are used to measure parameters for safe operation and control of the thickener, including measurements of the feed density, overflow clarity, feed flow rate, rake height and solid settling. The below …
Thickeners and clarifiers Complete range of reliable and …
High-density thickeners By adding depth and torque to a high-rate design, high-density thickeners improve underflow densities at a substantially lower cost than deep cone thickeners. Paste/high-density thickeners, ultra-high-rate clarifier-thickeners With more installations in more applications than all of our competitors combined, we are the ...
Mechanical model of scraper rake torque in deep-cone thickener
Finally, adopting the model, the driving parameters of a deep-cone thickener used in a mine were checked. The results show that the max torque is 633.8086 kN·m, which exceeds the shutdown ...
Thickener parts
Deflector cone and scraper; Break tank; ... Froth can also reduce thickener process performance (overflow clarity/underflow density) and impact the efficiency of adjacent processes such as flotation and filtration. ... High Rate Thickeners are the result of continuous development and innovations, enabling guaranteed process performance and ...
Thickeners
Thickeners are often rated on lbs. of solids per square foot of surface area. Briefly, its functioning can be explained with Scraper blades or "rakes" that are used in a thickener, which rotate slowly over the bottom of the tank, and slope down towards the centre and move the material settled on the bottom to a central opening or discharge.
Thickeners — Types, Working Principle & Applications
In the 1980's, machines known as "high capacity" or "high rate" thickeners were introduced by various manufacturers. These machines are characterized by a reduction in unit area ...
High-rate Thickener | FL
EIMCO and Dorr-Oliver thickeners are available in both bridge-supported and column-supported designs. We offer beam- or truss-type bridges, depending on thickener diameter. In the bridge-supported design, suitable for thickeners up to 50 m in diameter, the drive is supported by the bridge, driving the rakes with a centre shaft.. Column-supported design …
Deep Cone® Thickeners | FL
Key Benefits. Higher underflow density. Exceptional overflow clarity. Low OPEX. Stay updated on your industry. Effective solid-liquid separation is critical to your plant's overall …
SEPARATION RECOVERY OF HIGHLY CLARIFIED LIQUID
encompasses a unique underflow cylinder scraper to ... the thickeners to be installed in various challenging applications where the highest underflow densities are required. 8. 9 High-rate bolted thickener for iron ore, 18 m in diameter ... • Easily replaceable discharge cone High-rate bolted thickener for Pb/Zn tailings, 35 m in diameter. 10
DualLSTM: A novel key-quality prediction for a hierarchical cone thickener
The hierarchical cone thickener is a critical device for paste filling in the mining industry ( Fang et al., 2022, Huan et al., 2019, Tan et al., 2015 ). The current mining and paste-filling industry still faces some thorny challenges. For example, the underflow concentration of the cone thickener system (CTS) directly determines the quality of ...
ANDRITZ thickening and clarification systems
CCD dilution pump/mixers allowing flat design and elimination of elevation differences between CCD thickeners; Maximized soluble recovery thanks to inter-stage mixing; High levels of closed-circuit dilution counteract the …
Flocculation, dewatering and sedimentation behaviour of …
The more obvious difference is in the front part, that is, the high-concentration underflow via thickeners. ... Achieve a 3% increase in ore recovery rate and a 2% reduction in mining dilution rate. FL Deep Cone® Thickener • High concentration (79–81%) long-distance (5188 m) metal mine paste gravity-driven flow transportation ...
The solids concentration distribution in the deep cone thickener…
The feed flux of lead/zinc tailings was 0.254 t·h −1 · m −2 with a flocculant (high molecular weight anionic polyacrylamide) dose of 20 g/t. The thickened solids bed was sheared by a rotating rake at a rate of 0.2 rpm. The underflow was recirculated at a flux of 0.5 t·h −1 ·m −2, which can introduce additional shear stresses into ...
Thickener Spiral Rake Blade | FL
The spiral design of our thickener rake arm assembly offers a number of unique benefits that traditional rake arms cannot provide. By delivering a consistent, low-torque action in the high-density underflow, the spiral rake arm reduces power peaks and valleys, and reduces the ratholing that conventional straight rake arms can create.
CCD & High-Density Thickeners
Footprint can become a significant CAPEX consideration when excavation costs are elevated. To illustrate, we will assume our high-rate thickeners in Table 8 cost $1 million each. Therefore, all ...
High Rate Thickeners | Dewatering Plant
Filtaquip Conventional High Rake Thickeners, ideal for large water flows, have a limited height and a large surface area. Equipped with a peripheral scraper bridge …
Efficiency of raking in gravity thickeners
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).
Thickeners and Clarifiers
High Flow Clarifiers/Thickeners. Our uniquely designed clarifier/thickener provides maximum underflow density capability of up to 70% w/w solids content, and maximum flow capacity of up to 7000 GPM. Our design effectively separates the settling, dewatering and compaction functional volumes effectively eliminating the high torque conditions ...
Conventional Thickeners
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 …
HiFlo™ High-Rate Thickeners | PHOENIX Process Equipment
PHOENIX HiFlo™ High Rate Thickeners clarify wash plant effluent water while thickening the slurry to 40-45% solids, greatly reducing the underflow slurry rate to the slurry pond. PHOENIX Thickeners use sedimentation technology to maximize the water recovery rate, providing clarified overflow water that can be recycled and reused in the process.
High Rate Thickeners
Description. The High-Rate thickeners became popular in the mid 1980's and are relatively newcomers to the sedimentation line of equipment. As already discussed previously Thickeners are a major component in a plant layout and occupy large spaces which may be saved by introducing high-rate machines. Furthermore, they are normally positioned …
SOLUBLE METAL RECOVERY IMPROVEMENT USING …
a High Rate Thickener. As one can see in Figure 3, the continuous simulation achieved an underflow suspended solids concentration of 59 wt% when the mud residence time is between 4 and 6 hours. This residence time is normally associated with High Density thickeners (High Rate thickeners have residence times less than this).
SEPARATION RECOVERY OF HIGHLY CLARIFIED LIQUID
ANDRITZ paste thickeners incorporate: • High side walls, steep tank floors and unique feedwell design to enhance settling and promote paste formation to maximize underflow …
(PDF) Design and Operation of the Kupol Project …
In some applications, underflow with the co nsistency of paste can be achieved b y high rate, high rate rakeless, or high density machines. However, deep thickeners are cur rently the best ...
High Rate Thickeners
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 levels. Solids settle out onto the baffles and are removed from suspension after settling only a short distance. Where and to the extent …