The effective collision of ultrafine tailings particles in suspension with … Expand. 30. 1 Excerpt; ... and the water is recovered in downstream operations in the high rate thickener (HRT) and vacuum belt filtration (VBF). Clean coal ... Solid flux density determination by ultra-flocculation. F. Concha N. Rulyov J. Laskowski. Engineering ...
In order to develop rational methods of measurement and laboratory testing, it becomes necessary to study the general phenomena of settling rates. Since it was desired to give the public the benefit of these methods at as early a date as possible, together with the knowledge of the general principles of slime settling necessary for a ... ="Measuring …
The thickening process is the primary method of producing high solids slurries for the minerals industry. Thickener outputs can accommodate a range of tailings disposal options from low yield ...
The High rate thickener are equipped with a Sedicontrol system that monitors continuously the flocculation and adapt the polyelectrolyte dosing according to the right settling speed. In this way the thickener plant is able to guarantee automatically constant settling performance. High rate Thickener in mine. The feed well of the Cogede High ...
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.
Thickener design provides water clarification while thickening slurry from wash plants; High underflow solids for reduced or eliminated slurry pond storage area; …
Table 1 Pre-feasibility and feasibility engineering study thickener design parameters Parameter Unit Value Feed - Tailings Thickener type - High Rate Numbers of thickeners - 1 Thickener diameter m 100 Nominal tailings throughput t/d 54,000 % +25 % t/d 67,500 % 57 % Design factor Design tailings throughput Nominal underflow solids concentration ...
Ultra High Rate Thickeners – AltaFlo™ ... 502-499-6198; HiFlo™ High Rate Thickeners / Clarifiers. 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 AltaFlo™ ultra high-rate thickener is a rake-less thickener that provides mixing, flocculation and internal dilution followed by clarification and positive sludge collection and removal in a single tank.
The upper section of a Paste Thickener is identical to a High-Rate Thickener and relies on achieving optimum flocculation conditions in the proprietary feed system. The optimum feedwell solids are commonly determined by testwork. Care needs to be taken to ensure exit velocities from the feedwell do not cause excessive shear and fracturing of …
The concept of an ideal suspension and ideal thickener was presented for the first time by Shannon and Tory and ... High-density and paste thickeners are similar to conventional or high rate thickeners, but with steeper cones and much higher cylindrical tanks. The additional height produces more pressure on the sediment at the bottom of …
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, …
McLanahan offers a range of thickener types, including High-Rate, Ultra Rakeless, High-Density and ... High-Rate Thickeners are used by the aggregate and mining industries, as well as environmental contractors, to recover approximately 85% of water for reuse. This high-level of water recovery keeps water consumption at sustainable levels, as ...
Key Benefits. Maximum capacity. Improved control. Increased underflow density. Lower flocculant dose. Better slimes management. Stay updated on your industry. Improve your …
Hi-Rate Thickeners. The HI-RATE THICKENER is a MechProTech OEM product manufactured in-house. It has a structurally grated walkway across the top. Suspended from the walkway at the top of the tank is the drive assembly consisting of a gearbox driven by an electric motor and the hydraulic lifting system.
High-Density Thickeners separate liquids from solids using gravity settling. A key requirement is to contact the solids with added chemicals under the right shear conditions for building large floccules. The efficiency of flocculation contributes to an enhanced settling rate. Once settled in the bottom of the tank, the deep mud bed is further ...
Thickener Sizing Calculator valid for settling thickeners, high rate thickeners, and clarrifiers. Exit Thickener Calculator. Process Input. Parameters. Value Units. Solids Feed: [t/h] Overflow Flowrate: [m3/h] Settling Properties. Parameters. Value. Value. Rise Rate:
Abstract: To overcome the problems of long dissolution time and high investment in surface facili-. ties of powder thickeners in hydraulic fracturing, a novel suspension of a thickener as a ...
High-rate thickeners Ultra-high rate Paste thickeners Maximum pumpable underflow Decreased area Slow settling Large area Better settling Smaller area, improved underflow density Fig. 1. Evolution process of paste thickener [19]. 350 Int. J. Miner. Metall. Mater., Vol. 28, No. 3, Mar. 2021
High Rate Thickener (ENG) - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
Ultra-high-rate thickeners mainly consider just hydraulic loading, which compares the rise rate of water to the settling rate of solids. The industry standard is to scale the initial settling rate, measured in a bench test, by a factor of 0.7. ... helping to keep all solids in suspension. Neither system can impart the same kind of agitation ...
Fix a narrow strip of paper on one side of the container. Mix pulp thoroughly. Draw a line on the paper at the top of the pulp and mark "0" minutes. For five minutes, at one-minute intervals, mark the point to which the solids have settled. This determines the free settling rate of the solids at the initial density.
Polyacrylamide (HPAM) is commonly used as a thickener in water-based fracturing fluids due to its good solubility and thickening ability. However, drawbacks such as the formation of high temperature and high salinity in oil and gas production currently limit its use as a thickening agent for fracturing fluids. To solve this problem, a …
Acceleration of pulp thickening at high-rate clarification of water discharge is efficient with ... Ultra-flocculation of suspension reduces the flocculation time span 100 times and improves flocculation efficiency. ... Figure 5 shows residual concentration of mini-thickener discharge versus the ultra-flocculation treatment rate (velocity ...
Thickener design provides water clarification while thickening slurry from wash plants; High underflow solids for reduced or eliminated slurry pond storage area; Low installed …
High Rate Thickeners. Perhaps the most significant design optimisation effort in thickening in the last twenty years has been in developing ways to more effectively use the horizontal cross sectional area of the thickener. The introduction of polymeric flocculants gave an impetus to development of High Rate Thickeners.
4 FLS — Thickeners and Clarifiers High-rate thickeners High-rate thickeners are designed to provide roughly 12 times the throughput of conventional machines of similar size. The key features for high-capacity thickeners are the feedwell design and the feed slurry dilution method. Our patented E-Volute™ feedwell offers Computational Fluid ...
A hydrophobically associating copolymer (HPAOS) with synergistic interactions between the monomers, 2-acrylamido-2-methylpropanesulfonic acid, octadecyl methacrylate, octadecyldimethylallyl ammonium chloride, and acrylamide was synthesized by free radical polymerization, followed by hydrolysis. Fourier transform infrared …
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 …
Ultra-high viscosity alginates were extracted from the brown seaweeds Lessonia nigrescens (UHV N, containing 61% mannuronate (M) and 2% guluronate (G)) and Lessonia trabeculata (UHV T, containing 22% M and 78% G).The viscoelastic behavior of the aqueous solutions of these alginates was determined in shear flow in terms of the …
resulting in better thickener operability and improved response to process changes. It also enables improved overflow clarity with higher underflow density. Flocculant usage is one of the highest running costs for a thickener. Reactorwell™ features are proven to lower thickener running costs. The improved Autodil™
AltaFlo ultra high-rate thickeners perform well as tailings thickeners, in CCD circuits, as concentrate thickeners, and in leaching circuits. The low CAPEX economics of an AltaFlo also make it a perfect solution for …
The AltaFlo™ ultra high-rate thickener is a rake-less thickener that provides mixing, flocculation and internal dilution followed by clarification and positive sludge collection and removal in a single tank. The …
World's largest and highest capacity bridge and column mounted thickeners. High-rate and standard thickeners. High-density thickeners. Deep cone paste thickeners. …
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 ...
On the other hand, very low flux rates could result in a thickener with a very high area. Therefore, non-segregable niobium ore tailings could be achieved with thickeners from a 0.5 (t/h)/m 2 flux rate and a 0.5 m bed height, which generated an underflow with a 66.8% solids content, a yield stress higher than 40 Pa, a 67.1% slump, …
The AltaFlo™ ultra high-rate thickener is a rake-less thickener that provides mixing, flocculation and internal dilution followed by clarification and positive sludge collection and removal in a single tank. The principles of flocculation have been further adapted to a new design that will thicken slurries at an even higher rate than a ...
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 …
Applications. Rake-less design with no moving parts or wear items. Internal automatic dilution circuit. Small footprint. Simple design. The WesTech AltaFlo High-Rate …