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1

Role of maceral groups in coal beneficiation : A short review

An Ping, Liu Xinran, Xia Wencheng, Peng Yaoli, Xie Guangyuan

Physicochemical Problems of Mineral Processing

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2024

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Vol. 60, iss. 1

art. no. 183765

EN

Macerals are the basic constituents of coal that can be distinguished and identified under the microscope. Depending on the difference in optical properties, the macerals are divided into four maceral groups, including liptinite, vitrinite, huminite and inertinite. These maceral groups not only affect coal mining and utilization but also play different roles in coal beneficiation. According to the different properties of maceral groups, they can be separated (or enriched) to provide high-quality raw materials for the coal industry. This review briefly introduces the international maceral classification system and reviews in detail the role of maceral groups in coal beneficiation combined with their properties.

2

Optimization of flotation conditions in the beneficiation of PGMs tailings

Hlotse Daphney, Mbaya Richard K.K., Shongwe Mxolisi B.

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 6

art. no. 176859

EN

For several years, mining waste has shown a negative impact on both the environment and human health. The mining industry remains the backbone of the economic growth. Different technologies have been implemented to beneficiate and recover platinum group metals from tailings. The recycling of tailings has been a point of research interest due to their extensive applications. Flotation has been the primary process of upgrading and recovering PGMs. The focus of this study was to optimize flotation conditions in the beneficiation of PGMs for particular small-scale mine tailings. This was done to obtain the most favourable conditions for the small-scale mine tailings to improve operating conditions of specific particle sizes. PGMs tailings obtained from a small-scale mine were characterized using XRD, XRF, SEM/EDS, and ICP - OES to understand the properties of the tailings prior to mineral processing. Flotation batch tests were conducted. The results showed that the chosen particle size was 75 µm, and the favorable reagent dosages were 150 g/Mg and 100 g/Mg for SIBX (collector) and Starch(depressant), respectively. At favourable conditions, the recovery was 65.75% (Pt = 70.38%, Pd = 59.33%, Ru = 34.56%), and the grade was 31.46 g/Mg (Pt = 21.43 g/Mg, Pd = 9.62 g/Mg, Ru = 0.41 g/Mg). It can be concluded that all the flotation parameters are related; lower particle sizes yield high recoveries and better grades due to the exposure of the particle surface to the reagents responsible for the flotation of the PGMs. It was observed that the high collector dosages produce high recoveries with low grades of PGMs. High depressant dosages produce low recoveries with high grades of PGMs. The relationship between the collector and the depressant is of essential importance in the flotation process.

3

Mineralogical characteristic and beneficiation evaluation of rare earth carbonate wall rock

Gao Chunqing, Yan Guoying, Wang Hailiang, Luo Hongzhen, Zhang Lin, Yang Hanxu, Xu Jian

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 1

art. no. 161300

EN

In order to rationalize the development and utilization of the wall rock discarded during rare earth mining, chemical analysis, inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction analysis, artificial panning, optical microscope analysis, mineral liberation analysis and energy-dispersive spectroscopy were used to study the process mineralogy of the wall rock. The results show that the main useful elements in the rare earth wall rock were iron, light rare earth elements, fluorine and niobium. Iron was mainly occurrence as magnetic iron in magnetite, rare earth elements in bastnaesite and monazite, fluorine as a independent mineral in fluorite and niobium in columbite. The main useful minerals were finely disseminated, with magnetite (48.16%), bastnaesite (49.04%), monazite (42.18%), fluorite (39.30%) and columbite (63.26%) distributed in -0.030 mm particle size. The useful minerals were evaluated separately for beneficiation based on the process mineralogical characteristics of the rare earth wall rock, and the results showed that magnetite, rare earth and fluorite resources could be effectively recovered using magnetic separation, flotation, gravity concentration and leaching enrichment methods. The sequential recovery of iron, rare earth, fluorine and niobium elements produces iron concentrate (65.40% TFe at recovery of 38.03%), rare earth concentrate (50.66% REE at recovery of 62.73%), fluorite concentrate (95.23% CaF2 at recovery of 40.34%) and niobium iron ore concentrate (1.63% Nb2O5 at recovery of 5.56%). This study provides recommendations for the rational development and utilization of rare earth wall rock and provides reasonable levels of recovery predictions.

4

Magnetic separation of lunar regolith as its beneficiation for construction effort on the Moon

Kobaka Janusz, Katzer Jacek, Seweryn Karol

Artificial Satellites : Journal of Planetary Geodesy

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2023

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Vol. 58, Special Issue 1

203--213

EN

A concept of magnetic separation of regolith for production of lunar aggregate is presented in the paper. Future construction effort on the Moon will require significant amounts of concrete-like composites. The authors formulate a hypothesis that magnetic separation of regolith would be a very efficient beneficiation procedure solving multiple civil engineering problems associated with properties of raw lunar soil. For the research program, 10 lunar soil simulants were used. The magnetic separation was feasible in majority of cases. Acquired lunar aggregate would be useful for both concrete-like composite production and covering the surface of a habitat. The aims of future research are pointed out in the paper.

5

Mining energy consumption as a function of ore grade decline: The case of lead and zinc

Ricardo Magdalena, Valero Alicia, Palacios Jose-Luis, Valero Antonio

Journal of Sustainable Mining

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2021

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Vol. 20, iss. 2

109--121

EN

Demand for raw materials is increasing exponentially. To satisfy that demand, more minerals need to be mined from the Earth's crust. As a result, minerals are being exhausted, and ore grades decline. Lower ore grade mines also mean more energy, which in turn entails fossil fuel emissions and more climate change. This paper estimates the specific energy for the beneficiation process of metals lead and zinc as case studies. The evaluation is performed with specialized software, HSC Chemistry which assesses the specific energy for every stage: comminution, flotation, and refining. Different scenarios have been established to simulate the behavior of a mine when it approaches depletion. Preliminary results show that energy consumption for lead would increase by five times when compared to the current situation if ore grades decrease until the level of tailings, while for zinc by almost two.

6

Expanded vermiculite-reached product obtained from mining waste: the effect of roasting temperature on the agronomic properties

Kremenetskaya Irina, Alekseeva Svetlana, Slukovskaya Marina, Mosendz Irina, Drogobuzhskaya Svetlana, Ivanova Liubov

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 1

102--112

EN

This article explores the possibility of using the vermiculite-lizardite granular product with 30% of vermiculite content for the potential agronomic application. The vermiculite-lizardite product was obtained by beneficiation of phlogopite mining waste (Kovdor, Murmansk region, Russia). The beneficiation scheme included a hydro separator, a spiral separator, and concentrating tables. The output of vermiculite-lizardite product was about 35%. The effect of roasting temperature on the hydrophysical and agrochemical properties of the vermiculite-lizardite material and the mono-mineral vermiculite was studied. Heat treatment of materials was performed in the laboratory shaft furnace. Based on the differential thermal analysis results, a temperature of 700℃ was selected as the upper limit and the temperature of 400℃ - as the lower limit of the temperature range in order to obtain an expanded vermiculite-reached product containing lizardite. For samples obtained in this temperature range with a step of 25℃, a set of data such as bulk density, water saturation, surface area, volume and average pore diameter, Eh, pH suspensions in water and KCl solution, chemical resistance in ammonium acetate solution buffered at pH 4.65 were obtained. The temperature range of 500-600℃ of the vermiculitelizardite granular product was determined as favorable for agronomic application.

7

Beneficiation potential of a low-grade coal from the Emalahleni (Witbank) coalfield

Nyoni Sancho, Bwalya Murray, Chimwani Ngonidzashe

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 5

849--859

EN

The challenge of coal depletion has, among other resolutions, forced countries such as South Africa which depend heavily on coal-generated electricity to consider low-grade coal to meet their energy requirements. The Emalahleni Coalfield has an abundance of low-grade coal in-situ and in discards obtained from the No. 4 seam. This research thus seeks to give a technical assessment of the beneficiation potential of such coal for use in power stations linked to the coalfield. To that end, gravimetric and flotation beneficiation techniques were used, and their demineralisation capacities were assessed using physicochemical and petrographic analysis techniques. The results obtained showed that demineralisation of the coal was possible; with 29.1 and 33.6% ash obtained for an ~50% mass yield from gravimetric and flotation beneficiation techniques, respectively, against a thermal ash content requirement of 25–34% for coal-generated electricity.

8

Simulations of mono-sized solid particles in the reflux classifier under continuous process conditions

Syed Naveedul Hasan, Khan Naseer Ahmed

Physicochemical Problems of Mineral Processing

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2019

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Vol. 55, iss. 3

631--642

EN

In this study, a fluidized bed separator incorporating inclined channels, the Reflux Classifier (RC), was modeled to describe the transport behavior of mono-sized solid particles using a 2D computational segregation-dispersion model. The model is a volume flux-based model comprising the dispersion and segregation fluxes. Simulations were performed to examine variations in the solid volume fraction of particle species of size 0.163 mm and density 2450 kg/m3 by altering variables such as fluidization velocity, underflow rate and water flux in the feed. The system achieved a maximum solid volume fraction of 0.50 (v/v) near the base at a fluidization velocity 0.00020 m/s, that reduced to 0.20 at the fluidization velocity 0.0060 m/s. Overall, the results showed a decrease in the average solid volume fraction from 0.37 to 0.21 for the corresponding fluidization velocities. Simulation results also successfully demonstrated the capacity of the RC in retaining the solid particles at a superficial fluidization velocity 0.020 m/s, significantly higher than the terminal settling velocity, 0.015 m/s, of the solid particles, due to the presence of an inclined channel. Similarly, with increasing the underflow rate, the average solid volume fraction decreased from 0.29 to 0.055 due to the discharge of a larger quantity of solid particles from the base. Furthermore, a higher concentration of solid particles was observed in the inclined section at lower water flux in the feed stream. Additionally, flux balance calculations were carried out at different points within the RC to ensure the accuracy of the model predictions.

9

Developing an optimum beneficiation route for a low-grade chromite ore

Can İlkay Bengü, Özsoy Büşra, Ergün S. Levent

Physicochemical Problems of Mineral Processing

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2019

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Vol. 55, iss. 4

865--878

EN

In this study, an optimum beneficiation route was developed for an existing concentrator that processes low-grade chromite deposits. This objective is challenging as the grade of the ore under consideration is approximately 5%, which is the lowest grade processed in Turkey. Detailed characterization, process mineralogy and liberation studies were performed. The optimum fineness of grind was found to be 100% finer than 0.4 mm after the initial beneficiation tests. Laboratory test work was performed using a combination of a teetered bed separator (TBS), spiral concentrator and shaking table. Two different circuit alternatives including a TBS followed by only shaking tables and a combination of a spiral concentrator, TBS, and shaking tables were compared. It was found that an alternative comprising a spiral concentrator, TBS, and shaking table provided better results, required less equipment, etc. Considering these results, a provisional flowsheet was developed, and a total final concentrate of 6.8% by weight with 49.5% Cr2O3 grade and 71.51% Cr2O3 recovery could be obtained. The detailed laboratory test work was followed by plant-scale trials for the verification of the experimental findings with different circuit configurations. From roughing and scavenging spiral groups, ~85% of chromite could be obtained prior to the shaking table concentration, and this led to a minimum increase of 20% in the total recovery with less footprint of the plant, reduced water usage, and lower operating costs.

10

The Effect of Beneficiation on Some Properties of Osun State Ceramic Raw Materials

Abiolaa Oluranti Adetunji, Oke Adekola Olayinka, Omidiji Babatunde Victor, Adetan Dare Aderibigbe

Journal of Casting & Materials Engineering

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2019

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Vol. 3, no. 3

62--66

EN

Clay, feldspar and silica sand are important industrial minerals which often need treatment commonly known as beneficiation to improve the quality of ceramic tiles produced from these materials. The different minerals, after sorting, were treated separately in distilled water, alcohol and hydrochloric acid before being crushed in a ball mill; they were then characterized using a pelletron accelerator. The results show an increased silicon content for clay, silica sand and feldspar; and reduced aluminum content for clay and silica sand but not for feldspar. Iron impurity and its oxide are also shown to reduce by over 50% in all the minerals while potassium was found to be the dominant element in feldspar among the defining elements. In conclusion, the increased quartz in the mineral will improve the hardness, density, porosity, and rigidity of ceramic tiles as well as providing support and controlling shrinkage. Furthermore, increasing the mineral quotient in feldspar will enhance its fluxing potential.

11

Evaluation by Multi Gravity Separator (MGS) of a Low Grade Chromite Tailing From Yesilova-Burdur (Turkey)

Deniz Vedat

Inżynieria Mineralna

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2019

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R. 21, nr 1/2

101--106

EN

In this study, concentrability by a Multi-Gravity-Separator (MGS) of the chromite tailings with content 23.84% Cr2O3 from Yeşilova-Burdur (Turkey) is investigated. Mineralogical analyses showed that the chromite tailings contain chromite and serpentine which formed as a result of alteration of serpantine group minerals such as olivines, chrysotile and talc. The tailings generated from chromite beneficiation plants in Turkey are generally concentrated by slime tables (Deister shaking tables) for producing the desirable saleable grade. However, slime tables are concentrating with low recovery for chromite minerals which are very fine particle size. MGS is an efficient method for separation of minerals by gravity at very fine particle size. In experimental studies, the effects of feed rate, washwater rate, drum speed and tilt angle, which are important for operating parameters of MGS observed for the low grade chromite tailings were investigated. As a result of the experimental studies performed, it was obtained a concentrate with saleable chromite grade and recovery from the tailings which is having size fraction under 0.075 mm.

PL

W artykule przedstawiono wzbogacalność w separatorze grawitacyjnym (MGS) odpadów chromitowych o zawartości 23,84% Cr2O3 z Yeşilova-Burdur (Turcja). Analizy mineralogiczne wykazały, że odpady chromitowe zawierają chromit i serpentyn, które powstały w wyniku zmian minerałów z grupy serpenitu, takich jak oliwiny, chryzolit i talk. Odpady wytwarzane w zakładach wzbogacania chromitu w Turcji są na ogół wzbogacanie na stołach koncentracyjnych dla drobnych ziaren (stoły wytrząsające Deister) w celu uzyskania produktu nadającego się do sprzedaży. Jednak stoły koncentracyjne się charakteryzują się z niskim uzyskiem minerałów chromitowych o drobnym uziarnieniu. MGS to skuteczna metoda wydzielania grawitacyjnego bardzo drobnych cząstek. W badaniach eksperymentalnych zbadano wpływ prędkości podawania, prędkości wody do wzbogacania, prędkości bębna i kąta pochylenia, które są ważne dla parametrów operacyjnych MGS badanych odpadów chromitowych niskiej jakości. W wyniku przeprowadzonych badań eksperymentalnych uzyskano z odpadów o uziarnieniu poniżej 0,075 mm koncentrat chromitu o jakości handlowej.

12

Beneficiation of Talc-Magnesite Ore with Cu-Co Mineralization

Brezani Ivan, Sisol Martin, Marcin Michal, Sykora Maros, Matasovsky Michal, Varga Peter

Inżynieria Mineralna

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2019

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R. 21, nr 1

141--144

EN

Magnesite ore with a low chalcopyrite – cobaltite mineralization was subjected to a series of separations designed to evaluate the possible concentration of the two accessory minerals. Although the Cu-Co grade in the ore (> 0.01% Co, > 0.1% Cu) is significantly lower than the typical economic grades, content of the main valuable mineral for which the ore is mined and processed in combination with a listing of cobalt as a critical raw material, coupled with their higher price might compensate for the additional beneficiation stages. The ore was first crushed and subsequently classified to -100 μm and +100 -400 μm size fractions. The fine fraction was upgraded by froth flotation processing in laboratory froth flotation cell. The coarser fraction was processed in several separation stages including gravity separation on shaking table, magnetic separation and corona electrostatic separation. The same procedure was also repeated with a higher-grade sample as a verification of the procedures. Preliminary results suggest that the accessory minerals can be separated from the talc-magnesite ore and individual mineral concentrates with about 19% Co and 28% Cu were prepared. However, further work must be done to achieve desirable recoveries for the processing to be economically viable.

PL

Ruda magnezu o niskiej mineralizacji chalkopirytu – kobaltytu została poddana serii separacji mających na celu ocenę możliwego uzysku dwóch minerałów towarzyszących. Chociaż zawartość Cu-Co w rudzie (> 0,01% Co,> 0,1% Cu) jest znacznie niższy niż wartości opłacalne ekonomicznie, zawartość głównego cennego minerału (magnezytu) , dla którego ruda jest wydobywana i przetwarzana w połączeniu z zawartością kobaltu jako surowca krytycznego może zrekompensować koszt dodatkowych etapów wzbogacania. W pierwszym etapie rudę kruszono, a następnie klasyfikowano do frakcji o wielkości -100 μm i +100 -400 μm. Drobną frakcję poddawano flotacji pianowej w laboratoryjnej maszynce flotacyjnej. Grubsza frakcja była przetwarzana w kilku etapach, w tym separacja grawitacyjna na stole wstrząsanym, separacja magnetyczna i separacja elektrostatyczna. Ta sama procedura została powtórzona z próbką o wyższych zawartościach. Wstępne wyniki sugerują, że minerały towarzyszące można oddzielić od rudy talku i magnezytu i zyskano koncentraty mineralne z zawartością około 19% Co i 28% Cu. Jednakże konieczne są dalsze prace w celu osiągnięcia pożądanych uzysków, aby przetwarzanie było opłacalne ekonomicznie.

13

Predictive control of the iron ore beneficiation process based on the hammerstein hybrid model

Porkuian Olga, Morkun Vladimir, Morkun Natalia

Acta Mechanica et Automatica

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2019

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Vol. 13, no. 4

262--270

EN

Non-linear, dynamic, non-stationary properties characterize objects of the iron ore beneficiation line. Therefore, for their approximation, it is advisable to use models of the Hammerstein class. As a result of comparing the three models of Hammerstein: simple, parallel and recursive-parallel, it was shown that the best result for identifying the considered processes of magnetic beneficiation of iron ore by the minimum error criterion was obtained using the Hammerstein recursive-parallel model. Hence, it is recommended for the identification of beneficiation production objects.

14

Wzbogacalniki strumieniowo-zwojowe do wydzielenia substancji węglowych z miałów

Friebe P.

Maszyny Górnicze

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2018

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R. 36, nr 2

28--38

PL

W artykule przedstawiono charakterystykę procesu wzbogacania na wzbogacalnikach strumieniowo-zwojowych, omówiono zasadę działania wzbogacalnika, w szczególności siły działające na ziarno płynące w korycie zwojowym. Dokonano przeglądu aktualnie stosowanych wzbogacalników strumieniowo-zwojowych oraz przedstawiono koncepcję wzbogacalnika strumieniowo-zwojowego typu KOMAG. Zaprezentowano schematy technologiczne ciągów technologicznych z wykorzystaniem wzbogacalników strumieniowo-zwojowych, w polskich warunkach, dla węzłów: osadzarkowego i flotacyjnego.

EN

Characteristics of beneficiation process in stream-and- spiral separators is presented. Principle of the separator operation, especially the forces acting on grains flowing in a spiral trough is discussed. Currently used stream-and-spiral separators are reviewed and a concept of KOMAG stream-andspiral separator is presented. Diagrams of technological lines of the process with use of stream-and-spiral separators in Polish conditions for jig and flotation nodes are given.

15

Technologia odzysku koncentratu węglowego z odpadów pogórniczych poprzez wdrożenia urządzeń typu KOMAG

Matusiak P., Kowol D.

Maszyny Górnicze

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2017

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R. 35, nr 2

42--52

PL

W artykule przedstawiono proces wdrażania klasyfikatorów pulsacyjnych na składowisku odpadów pogórniczych w Przezchlebiu. Zaprezentowano również wyniki skuteczności rozdziału klasy ziarnowej 30-5 mm w klasyfikatorze pulsacyjnym. Omówiono problemy związane z zanieczyszczeniem wody obiegowej stosowanej w procesie odzysku koncentratu węglowego z odpadów.

EN

The implementation process of pulsatory jigs at the mine waste in Przezchlebie is presented. Results of effectivness of sepatation of different grain size 30-5 mm in pulsatory jig are presented. Problems of polluting the water used in the process of recycling coal from the coal waste is discussed.

16

Możliwości inżynierii mineralnej w badaniach nad przygotowaniem węgli do zgazowania naziemnego w gazogeneratorze fluidalnym

Gawenda T., Krawczykowski D., Marciniak-Kowalska J.

Przegląd Górniczy

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2014

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T. 70, nr 11

107--119

PL

W artykule przedstawiono wyniki badań nad przygotowaniem węgli do procesu zgazowania w gazogeneratorze fluidalnym. W oparciu o analizy składu ziarnowego i chemicznego węgli wybranych do badań, dokonano analizy efektywności procesów rozdrabniania w różnych urządzeniach i oceny pracy różnych urządzeń rozdrabniających pod kątem rozkładu parametrów jakościowych węgl, co umożliwiło dobór urządzeń oraz warunków rozdrabniania i klasyfikacji węgli. Opracowano procedury optymalizacji produkcji paliwa – węgla przeznaczonego do procesu zgazowania fluidalnego. Przedstawiono innowacyjne rozwiązania układów technologicznych przygotowania węgli (rozdrabniania i wzbogacania węgli) na drodze przeróbki mechanicznej dla procesu zgazowania węgla w złożu fluidalnym.

EN

This paper presents the results of study on coal preparation to gasification process conducted in the fluidized bed gas generator. On the basis of the particle size distribution and chemical composition of coals selected for the research, the analysis of comminution efficiency was performed for various devices, and the evaluation of their operation was made considering distribution of coal qualitative parameters. That allowed to select proper devices and conditions for coal comminution and classification. The procedures of fuel – coal destined to the fluidized gasification process – production optimization were elaborated. The innovative solutions of technological systems of coal preparation (comminution and beneficiation) were presented by mechanical processing of coal gasification in the fluidized bed.

17

Assessment of coal slurry deposits energetic potential and possible utilization paths

Lutynski A., Lutynski M.

Physicochemical Problems of Mineral Processing

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2014

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Vol. 50, iss. 1

159--168

EN

Coal-slurries and post-flotation mud have the highest carbon content among other mine waste produced during coal mining and preparation. Therefore, coal slurries deposited in impoundments can be regarded as potential fuel. In the article methods of energetic potential assessments of raw and beneficiated coal slurry deposits were discussed. Results of such assessment for 21 impoundments were presented and the loss of energetic potential due to the imperfection of beneficiation method was discussed. The lowest losses were observed for beneficiation by froth flotation where the loss of energetic potential was on average 15%. The highest loss was observed for beneficiation in centrifugal separators where on average it was 68%. Possible paths of utilization of such slurries in Polish national fuel balance were studied using the SWOT analysis. The results of the SWOT analysis indicate that the internal factors, i.e. the ones related to the coal slurry processing technology have much lower impact on the possibility of using coal slurry deposits in the national fuel balance. Instead, according to the experts, external factors have much greater impact.

18

Interrelation of the fuerstenau upgrading curve parameters with kinetics of separation

Bakalarz A., Drzymala J.

Physicochemical Problems of Mineral Processing

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2013

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Vol. 49, iss. 2

443--451

EN

It was shown in the paper that kinetic equations relating recoveries of two components in separation products and time, when combined together to eliminate the time parameter, provide mathematical equations which relate recoveries of the two considered components in concentrate. The obtained one-adjustable-parameter type equations are very useful for approximation of the separation results plotted as the so-called Fuerstenau upgrading curves. Most empirical mathematical formulas presently used for the Fuerstenau plots were derived using various kinetic equations while some are still awaiting for their kinetic derivation.

19

Impact of quantitative and qualitative differentiation of feed on effectiveness of jig beneficiation process

Kowol D., Łagódka M.

AGH Journal of Mining and Geoengineering

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2012

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Vol. 36, no. 4

49-56

EN

Effectiveness of operation of pulsatory jigs depends on their design solutions and adjustment of operational parameters to the characteristics of beneficiated material and production quality requirements. Proper preparation (blending, feeding) of the material for beneficiation is a very important issue. Results of laboratory tests aiming at determination of impact of quantitative-and-qualitative differentiation of feed on effectiveness of its separation in a pulsatory jig are presented in the paper. The tests showed that irregular feeding of material along entire operational trough to a pulsatory jig causes a significant reduction of beneficiation effectiveness. It was found that quantitative irregularity of feeding has bigger impact on a beneficiation result.

PL

Skuteczność działania osadzarek pulsacyjnych uzależniona jest od ich rozwiązań konstrukcyjnych oraz dostosowania parametrów pracy do charakterystyki wzbogacanego materiału i wymogów jakościowych procesu produkcyjnego. Niezwykle istotnym zagadnieniem jest odpowiednie przygotowanie (uśrednienie, wprowadzenie) materiału przeznaczonego do wzbogacania. W artykule zamieszczono wyniki badań laboratoryjnych zmierzających do określenia wpływu zróżnicowania ilościowo-jakościowego nadawy na skuteczność procesu jej rozdziału w osadzarce pulsacyjnej. Badania wykazały, że nierównomierne wprowadzanie materiału, na całej szerokości koryta roboczego, do osadzarki pulsacyjnej powoduje znaczne zmniejszenie skuteczności procesu wzbogacania. Stwierdzono, że większy wpływ na wynik procesu wzbogacania ma nierównomierność ilościowa wprowadzania nadawy.

20

Zalety krzywej uzysk-uzysk (Fuerstenaua) do technologicznej analizy i oceny wzbogacania surowców

Drzymała J., Łuszczkiewicz A.

Przegląd Górniczy

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2011

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T. 67, nr 7-8

122--128

PL

W pracy opisano krzywe wzbogacania uzysk-uzysk, nazywane również wykresem Fuerstenaua. Wykres ten, przedstawiający zależność uzysków składników nadawy w produktach separacji, jest bardzo użytecznym narzędziem do analizy, oceny i porównywania wyników procesów rozdzielczych traktowanych jako wzbogacanie. Krzywa Fuerstenaua pozwala na matematyczny opis wyników wzbogacania oraz określenie selektywności procesu, a po przyjęciu kryterium, także optymalnego punktu wzbogacania. Jest to także bardzo użyteczny wykres do porównywania wyników separacji przy zmiennej jakości nadawy, gdyż jest on tak zwaną alfa-nieczułą krzywą wzbogacania. Ponadto, dzięki nikłemu podobieństwu parametrów osi wykresu, krzywa Fuerstenaua nadaje się do statystycznej oceny wyników separacji opartej na współczynniku determinacji R2.

EN

In the work the recovery-recovery beneficiation curves, called also the Fuerstenau’s plot, have been described. This plot, presenting the relationship of recoveries of feed components in separation products is a very useful tool for the analysis, assessment and comparison of results of distribution processes treated as beneficiation. The Fuerstenau’s curve allows the mathematical description of beneficiation results and determination of process selectivity, and after criterion adopting it enables also to determine the optimum beneficiation point. This is also a very useful plot for comparing the separation results under changeable feed quality, because it is the so- called alpha-insensitive beneficiation curve. Moreover, owing to the hardly perceptible similarity of plot axis parameters, the Fuerstenau’s curve is suitable for the statistical assessment of separation results on the basis of the determination coefficient R2.