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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 ...
Tailings from coal washing plants; Recycled water from aggregate washing . The Thickener Components. As mentioned previously most of the high-rate thickeners subassemblies are similar to those of conventional thickeners except for lifting devices that .
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.
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.
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,
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.
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.
In high rate thickener (HRT) designs the rise rate or solids loading will dictate the required tank diameter for any given throughput. In high compression (HCT) and paste (PT) applications the bed depth or the mass of solids in the thickener must also be selected to ensure the desired underflow density from the thickener is achieved.
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.
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. ...
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
• 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.
----- 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 ...
Thickener. Hydrocyclone overflow and flotation unit underflow solids are removed in a high-rate thickener. The thickener also receives horizontal vacuum belt filtrate that is rich in fine solids. The thickener allows the solids to settle and produces a clarified water .
The AMIRA P266 'Improving Thickener Technology' series of projects has sought to provide a firm scientific basis for feedwell and thickener design, a requirement as pressures on water usage in the ...
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.
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.
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.
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.
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.
Optimized thickeners in coal preparation plants Using optimized thickeners for level measurement applications in a coal mind can yield safer and more efficient plant control. Level measurement equipment is part of almost every process in a coal mine. You hardly see the
LETTER FROM AUSTRALIA Why high-rate thickeners are now preferred by the gold industry by Allan Waters BHP Research & New Technology, Shortland, NSW High-rate thickeners have shown themselves to be more cost-effective than conventional thickeners in recovering water and cyanide in gold mines, and other mineral processing plants.
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.
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 ...
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