spiral separator for fine coal
Modeling and optimization of spiral concentrator for …
ResultSpiral separators are used globally in the mineral and coal industry. This consists of an open trough that twists downward in helix configuration about a central axis. ... to determine the operating parameter values needed to achieve optimum separation performances while treating ultra fine coal in a conventional …
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A case study of the modification potential of using spiral separators
ResultKillmeyer et al. (2001) examined the cleaning of fine anthracite coal using spiral separators. The results revealed that a single-stage spiral cleaning procedure with a wide size fraction was not capable of achieving the clean coal ash and yield that the specifications required. However, Benusa and Klima (2009) evaluated the …
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Enrichment of residual carbon from coal gasification fine …
ResultDeveloping a technology to utilize coal gasification fine slag and recover the residual carbon is becoming essential for an eco-friendly coal …
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Modeling and optimization of spiral concentrator for …
ResultThe experimental results show that the spiral separator is efficient to remove ash and enriched carbonaceous components in coal gasification fine slag by separating feed () into concentrate (81.2%), middlings (8.8%), and tailings (10.08%), where the ash content in tailings is up to 90%, accounting for 18.5% of …
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Structural properties of residual carbon in coal gasification fine …
ResultCoal gasification fine slag (FS) is a typical solid waste generated in coal gasification. Its current disposal methods of stockpiling and landfilling have caused serious soil and ecological hazards. Separation recovery and the high-value utilization of residual carbon (RC) in FS are the keys to realizing the win-win …
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Low-density Separation Techniques Recover Valuable Coal …
ResultThere are three ways to make a lower cut in the fines circuit: the use of a teetered-bed separator (TBS) or a REFLUX Classifier (RC), low-density spiral …
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Comparative Study of Separation Performance of a Spiral …
ResultSpiral separators and dense-medium cyclones (DMCs) are widely used for separation of −1 + 0.125 mm fine coal. In this study, testing was carried …
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Getting the Most from Spiral Separators
ResultSpiral separators are used to recover the fine coal fraction (2-mm to minus 325 mesh). They are expected to recover fine coal over a wide particle …
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Performance Evaluation of Spiral Separator for Coal …
ResultThe performance study of spiral separator is carried out with the help of computational results by analyzing the two-phase flow field and influence of process parameter, i.e., feed rate on the distribution of coal slurry. The size of the coal is kept −0.5 mm and the feed rate is varied as 4, 6 and 8 m 3 /hr.
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Enrichment of residual carbon from coal gasification fine …
ResultThe experimental results show that the spiral separator is efficient to remove ash and enriched carbonaceous components in coal gasification fine slag by separating feed () into concentrate (81.2%), middlings (8.8%), and tailings (10.08%), where the ash content in tailings is up to 90%, accounting for 18.5% of …
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Coal Processing
ResultThrough the flotation process, the mineral matter is separated from the fine coal (which is smaller than 0.5 mm in size). The underflow reports to spiral separators/concentrators, which separate the lighter-density coal from the heavier-density material. The use of dewatering screens is generally the first step in the …
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Optimization of a Compound Spiral for Cleaning High Sulfur Fine …
ResultThe fine coal is typically upgraded by watered based density separators like spirals and water-only cyclones. Ultrafine coal is cleaned using flotation or discarded to waste pond (Zhang, 2008) .
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Enhanced gravity separators: New alternatives for fine coal …
ResultThe efficiency of cleaning fine coal by gravity separation methods for particle sizes less than 0.250mm is low. Units such as water washing cyclones and spirals have been successfully employed for the coarser size fractions, but significant losses of fine coal have been observed in these applications.
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New flotation flowsheet for recovering combustible matter from fine
ResultFlotation is an effective separation method for fine coal recovery that is based on the differences in the surface hydrophobicity of organic matter and mineral matter (Tian et al., 2018, ... with the spiral separator, 46.28% spiral clean coal with 26.50% ash content was obtained and 53.72% spiral tailings with …
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Some design considerations for spiral separators
ResultPergamon Minerals Engineering, Vol. 8, No. 11, pp. 1381-1395, 1995 Elsevier Science Ltd Printed in Great Britain 0892-6875(95)00104-2 0892-6875/95 S9.50+0.00 SOME DESIGN CONSIDERATIONS FOR SPIRAL SEPARATORS A. B. HOLLAND-BATT Mineral Technologies Division, Clyde Industries Limited, P.O. …
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Spiral beneficiation boost for coal industry
ResultSX10 SPIRAL SEPARATOR SX10 SPIRAL SEPARATOR The Multotec SX10 spiral that provides a lower cut point of between 1.5 – 1.55 g/cm³'s testwork …
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Cleaning of fine and ultrafine coal
ResultThe flow sheet of a typical fine coal cleaning circuit used in coal preparation plants is shown in Fig. 13.2.The underflow stream from the deslime screen which is nominally finer than 1 mm is combined in a sump with recycle streams from sieve bends used to deslime the spiral product.The material from …
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Multiobjective optimisation of spiral concentrator for …
ResultChromite beneficiation plants generate large amount of tailings with significant amounts of ultrafine chromite minerals. In the present investigation, Box−Behnken experimental design was used to model the effects of feed rate, feed pulp density and splitter position on the performance of a spiral concentrator for …
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Enrichment of residual carbon from coal gasification fine …
ResultDOI: 10.1016/j.jenvman.2022.115149 Corpus ID: 248464986; Enrichment of residual carbon from coal gasification fine slag by spiral separator. @article{Yu2022EnrichmentOR, title={Enrichment of residual carbon from coal gasification fine slag by spiral separator.}, author={Wei Yu and Hanlin Zhang …
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Some design considerations for spiral separators
ResultNew model spiral separators have now been developed that are specifically designed to treat material finer than 0.1 mm. Design features are discussed and performance data on a variety of ore types are presented to illustrate the effectiveness of gravity separation on material below 0.1 mm in size using fine …
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Application of response surface methodology for modeling …
ResultConventional spiral separator has had limitation with respect to particle size in the size range of 3 mm–75 μm [28]. During the operation on conventional spiral separator, very fine particles of size below 75 μm are swept up in the highly turbulent outer region due to poor trough design and are lost to …
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Low-density Separation Techniques Recover Valuable Coal …
ResultLow-density separation techniques are the big driver in fine coal recovery for met coal producers worldwide, Bethell explained. "Traditionally, in the last 30 years, spiral circuits would make a cut point in the 1.7-1.8 range, which means incrementally 35% ash material would report to the product stream," …
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Ultrafine coal cleaning using spiral concentrators
ResultIn coal preparation, simpler lower cost alternatives to froth flotation, such as the coal dense medium separator and spiral separators, have been adapted for cleaning …
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Spiral Separators | Hoffman Manufacturing
ResultAvailable in single or double separators. Hoffman Heavy-Duty Double Spiral Separator offers quality construction, welded, galvanized steel to withstand heat and vibration and both direct and hopper feeds. Four separating turns are standard, with fourteen flight sizes available from one and a half to eight inches.
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KREBS® Coal Spirals for fine coal cleaning
Spiral coal concentrators use the specific gravity of materials with different densities to separate coal, and produce a low-ash coal product at high efficiency. Our high-performance Coal Spirals deliver a feed capacity of 2 STPH to 3 STPH (1.8 mtph to 2.7 mtph) per start, dependent on raw coal quality and refuse amount to be discarded.
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Impact of spiral separator geometrical parameters on the …
ResultCoal slurries of particle size diameter below 1 (0.5) mm were subjected to beneficiation tests with the use of the following methods: centrifugal separator, hydrocyclone, Reichert spiral separator ...
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Application of Enhanced Gravity Separators for Fine Particle …
ResultAbstract Beneficiation of low-grade ore is of critical importance in order to meet the growing demand for coal and mineral industries. But, low-grade ores require fine grinding to obtain the desired liberation of valuable minerals. As a result, production of fine particles makes the beneficiation process difficult through …
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Mathematical modeling of separation characteristics of a coal …
ResultBecause of the paucity of force equilibrium data in the literature for washing of coal using a spiral separator, the validation of the model was attempted with the published data for a spiral used for processing of heavy mineral. ... A Study of the Potential for Improved Separation of Fine Particles by Use of Rotating …
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Impact of spiral separator geometrical parameters on …
Resultgeometrical parameters of three types of spiral separators (Krebs 2.85, Reichert LD-54, Reichert LG-7) on the efficiency of separation of various fine-grained materials. The practical application of this study was to select highly efficient spiral separator for the concentration of coal from coal waste slurries deposited in …
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"Application and evaluation of spiral separators for fine coal …
ResultEight buckets of wet coal samples were collected from Shade Coal Preparation Plant, including the feed, clean coal, refuse, and middlings for fine spiral and coarse spiral, respectively. Float-sink analysis was performed on these size intervals using LMT (Lithium Metatungstate) liquids. Size distribution analysis is conducted for …
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