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Aug 08, 2018· Working of a Thickener. Let us understand in detail about how thickeners work. To start with, it works on the principle of Gravity sedimentation and the most common construction of a thickener ...
Thickeners. Thickeners — or Clarifiers, depending on the application — can be used to recover immediately reusable process water, as well as extract fines and other materials. Thickeners can be used by mineral and aggregate producers, as well as by environmental contractors in industries such as wastewater management.
• High Rate thickener (special feed well design) • High Density thickeners (deeper sidewall and more robust drive) • Paste thickeners • Ultra high rate thickeners Our units are available in a variety of sizes starting from 3ft diameter pilot scale to 300ft diameter. We have standard "off the shelf" designs available.
The affect of PSD variations is that the yield stress curve will shift to lower wt% or high wt% depending on if the PSD is coarser or finer. The PSD is the variable that changes the most at any mineral processing plant. This fact is less important to high rate thickeners but very critical for paste thickeners.
Most thickeners operate with all three regimes present – certainly in any high rate thickener where feed dilution is used. One of the regimes will be the 'rate determining step' and this, together with the requirements of the process performance, will be the factor that determines the size and design of the equipment. 16.2.2.
White paper: Debottlenecking of Thickeners in a Changing Environment 2 In assessing the decision to modernize, we consider the elements of an upgrade and the advances in thickening technology that allow operators to meet new challenges. Finally, we will discuss the process of modernizing a thickener so as to achieve the client's stated outcomes.
HiFlo™ High-rate Thickeners Overview: WesTech HiFlo™ high-rate thickeners are used in many types of process circuits to separate liquids and solids at very high rates. They are highly effective in coal refuse thickening, gold recovery, CCD circuits, copper leaching, molybdenum processing and other mining and chemical flowsheets.
The Delkor Paste Thickener takes all the knowledge and experience of over 30 years providing thickeners . Shear Thinning System Available . Flocculant dosing is controlled by means of a bed level detection device . Conventional, High Rate, High Density, Ultrasep and Paste Thickeners treat a variety of materials in a . »More detailed
MIP Thickener Design The following is a short cut to designing your own thickener: (a) Size of Thickener As a first stab we can either use the thickener flux (m2/tpd) or the rise rate, depending if solids loading is the dominant (eg.
Both high-rate thickeners and dewatering centrifuges are used in the application of dewatering coal tailings. Both applications are well advanced and accepted as means to dewater coal. This paper compares a high-rate thickener to a solid bowl centrifuge with respect to numerous process, mechanical, electrical,
----- Factor TABLE 2 FACTORS AFFECTING GRAVITY THICKENING PERFORMANCE Effect Nature of the solids feed Freshness of feed solids High volatile solids concentrations High hydraulic loading rates Solids loading rate Temperature and variation in temperature of thickener contents High solids blanket depth Solids residence time Mechanism and rate of solids withdrawal Chemical treatment Presence of ...
Say, we have a coal tailings application and testwork shows a rise rate of 2 m/h with a pulp feed flow rate of 200 m. 3 /h. ... A factor (Z‐Factor) is used based ... Therefore for a 12m diameter high rate thickener with the coal tailings duty, we can use medium duty (K‐Factor of 15) ...
Care needs to be taken with the nomenclature of conventional or high rate thickeners. The critical difference is the use of feed dilution and flocculation in high rate thickeners over conventional thickeners; however, the high rate thickener has become so ubiquitous in the mining industry it has become the 'conventional' choice.
Jan 18, 2018· The concept of bolted thickeners is growing in popularity as a fit-for-purpose, high quality dewatering solution with reduced project construction risk and duration. The benefits offered by bolted thickeners have resulted in FL securing an order in July 2017 for a 24 m diameter high-rate thickener from a South African iron ore mining company.
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 outlet for pumping away.
In Table I of the July article, "improve Clarifier and Thickener Design and Operation," by Joel Christian (pp. 50-56), the titles Vi and TSS are reversed. The first TSS is 3.1 and the first Vi is 6.045. In the overloaded case on p. 55, the underflow c oncentration should be 240 kg/m 3, not 140. Also, the dashed line in Figure 9 is not used in ...
100 have been observed for selected materials in high rate thickeners. Whilst ... Understanding the Thickening Process B.J ... that one or more of the above factors may be prevalent. ...
High Rate Thickeners High rate thickeners are designed specifically to maximise the flocculation efficiency of flocculants. They differ from conventional thickeners in feed well design, size and control. Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener is below.
Determining these equivalent shape factors is an important achievement in mineral processing. Researchers can simply put these factors in chein's equation to calculate settling velocity and design thickener instead of doing time consuming experiments and modeling.
A high density thickener produces thickened tailings. The difference between a high rate and a high density thickener is the underflow will not segregate—that water remains bound into the mixture. A deep cone, or deep bed, thickener produces paste. Both high density and deep cone thickeners depend on retention time rather than area.
In underground mining, the WesTech Deep Bed™ Paste Thickener is an emerging option to the conventional solution of high-rate thickener/vacuum filter for paste backfill applications. There can be a number of factors which make paste thickening an attractive alternative.
Unformatted text preview: MIP Thickener Design The following is a short cut to designing your own thickener: (a) Size of Thickener As a first stab we can either use the thickener flux (m2/tpd) or the rise rate, depending if solids loading is the dominant (eg. Platinum Tailings) or feed flow rate (e.g. Clarification or low feed solids). Say, we have a coal tailings application and testwork ...
Paste and high rate thickening are emerging as a significant way to maximise water efficiency in Australia's coal industry. Outotec has designed and installed the first-ever paste thickener in Australia's coal industry and has won five further orders recently for paste and high rate thickeners.
How a Thickener Works. Previous Next ... Factors affecting Thickening rates. ... High Rate Thickeners. Gallery High Rate Thickeners . BUY Laboratory & Small Plant Process Equipment We have all the laboratory and plant equipment you need to test or build/operate your plant.
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